JPH05139588A - Heating device - Google Patents

Abstract

PURPOSE:To provide a heating device having a control means for changing the conveying speed of an endless film, and a control means for changing the film biasing movable range of a film biasing control means in accordance with a control speed from the conveying speed changing control means. CONSTITUTION:A heating device for heating a film using an endless film 11, comprises a film biasing control means 23 for changing the biasing direction of the film so as to endlessly reciprocate the film in a predetermined film biasing movable range in accordance with a detected data from a means 16 for detecting the widthwise biasing position of the film. Irrespective of the participation in the factor of control instability, the control means 23 substantially maintains the frequency of control reciprocation of film biasing within a predetermined range so as to minimize damage to the film caused by excessive stress to the film. Accordingly, the biasing control and conveyance of the film can be stably controlled, thereby it is possible to enhance the reliability of the heating device.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has an endless heat-resistant film which is rotated and conveyed, and a heating element which is arranged on the inner surface side of the endless film. A heating device of a film heating type, in which the heat of the heating body is applied to the material to be heated through the film by closely adhering to each other and conveying and passing the position of the heating body with the film.

[0002]

2. Description of the Related Art A heating device of the film heating type as described above is known from Japanese Patent Application Laid-Open No. 63-313182, and an image heating fixing device in an image forming device such as an electrophotographic copying machine, a printer, a fax machine, That is, electronic photography
Directly on the surface of the recording material (electrofax sheet, electrostatic recording sheet, transfer material sheet, printing paper, etc.) by using toner composed of heat-meltable resin by means of image forming process means such as electrostatic recording and magnetic recording. It can be utilized as an image heating and fixing device that heat-fixes an unfixed visible image (toner image) corresponding to the target image information formed by an indirect (transfer) method as a fixed image on a recording material carrying the image. Further, for example, it can be used as an apparatus for heating a recording material carrying an image to modify the surface properties of gloss and the like, an apparatus for post-process adhesion, and the like.

Regarding the film heating type fixing device, in comparison with other heat fixing type devices such as a heat roller type, a hot plate type, a flash fixing type and an oven fixing type. Since a low-heat-capacity linear heating element can be used as the heating element and a thin heat-resistant film having a thickness of, for example, about 40 μm can be used as the heating element, it is possible to shorten the rise time to a predetermined fixing temperature and save power. Since the fixing point and the separation point between the film and recording material can be set separately, toner offset can also be prevented.
It is advantageous in that it has advantages such as solving various drawbacks of other type devices.

As described above, the film may be of an endless type so that it may be rotated and conveyed to be repeatedly used, or an apparatus structure may be used in which an end-rolled film is fed and run. it can.

In a film heating type heating device using an endless type film, since the film moves in the width direction (direction orthogonal to the rotational transfer direction of the film) in the rotational transfer process of the film, Measures are taken to regulate the leaning movement.

[0006] As the deviating movement restricting measure, by restricting with ribs or flange members or forming the film suspending / conveying roller into a crown shape, for example, the film is a thin film and the material is made of polyimide or the like having a low elasticity. In some cases, it is difficult to regulate the shift of the film, and it is difficult to ensure stable rotational transport of the film.

Therefore, means for detecting the shift position of the film is provided, and when it is detected that the shift of the film to one side in the width direction reaches a predetermined limit position, the shift of the film is returned in the return direction. Actuating the means for displacing the film suspension conveyance roller so as to change to the other side in the film width direction, and conversely, when it is detected that the shift movement of the film to the other side in the width direction has reached a predetermined limit position, Rotating and transporting an endless film by providing a film displacement control mechanism that operates the means for displacing the film suspension transport roller so as to change the displacement of the film to one side in the film width direction, which is the return direction. A shift movement control mechanism is used which makes the shift movement in the film width direction in the process infinitely reciprocating within a predetermined constant range.

[0008]

However, a film heating type heating device using an endless film provided with the above-mentioned film shift movement control mechanism (hereinafter, described as a fixing device of an image forming apparatus) is also provided. ,
As described below, there is an instability in the film deviation control depending on the conditions.

(A) In recent image forming apparatuses, there are some types of toner materials for forming an image, for example, toners of different colors are used, and in this type of apparatus, the fixing condition depending on the characteristic difference of each toner is dealt with. Therefore, the passage time of the recording material to the fixing device, that is, the recording material conveying speed is made variable, and the toner having poor fixing ability is switched to the slow conveying speed, and conversely, the toner having good fixing ability and the high temperature offset property is switched to the fast conveying speed. It corresponds by that.

In this case, as a matter of course, since the recording material conveying speed and the film conveying speed are equal, the deviation speed generated in the conveyed film varies due to the speed change.

The above-mentioned film shift movement control mechanism detects the film shift position within a certain range and controls the film shift movement by reciprocating the film within that range, so that the film transport speed can be switched. When the shift speed of the film is increased, the frequency of the reciprocating motion of the film is naturally increased, which causes problems such as wrinkles and folds as damage to the film.

Further, when a film detection failure or a driving means for displacing the film suspending / conveying roller, for example, a solenoid is used, the driving frequency of the solenoid is increased and the solenoid itself may be heated more than necessary.

Regarding these condition settings, it is possible to optimize them in the initial state by the accuracy and adjustment of parts.
The above-mentioned film shift speed is an unstable element because it is expected to change due to durability and the like.

Especially, unlike the general film (belt) conveyance, since this device is a heating device, it is 150 to 150
Since the temperature reaches about 200 ° C, consider that the normal temperature state changes the initial film deviation conditions due to the coefficient of friction of the film transport means, the surface of the heating element, and the thermal expansion of the parts themselves such as the film suspension transport roller. I have to.

Further, in a film heating type heating device, since the film is conveyed while sliding on a fixedly supported heating body, it is also known to apply a fluorine-based heat-resistant grease to the inner surface of the film as a lubricant. However, this type of grease viscosity has a large temperature dependency, and this is also a factor that makes the conditions near the film unstable.

It is also considered that if the film is always reciprocated in the same region, the abrasion of the heating body surface, the heating body supporting member and the film conveying means is stopped.

That is, it suffices if it is possible to cope with the difference in the film transfer switching speed under the initial condition. Since the temperature is about 150 to 200 ° C., the friction coefficient changes (generally decreases) on the conveying means and the heating body surface, secondly, the temperature distribution of the heating body itself, and the non-sheet passing portion when passing a small-sized recording material. Deflection change due to thermal expansion difference in the longitudinal direction when temperature rises, thirdly wear of the film inner surface due to durability, conveying means, surface of heating body, fourth, sliding on inner surface of film with heating body When lubricating a fluorine-based heat-resistant grease for the purpose of preventing vibrations of the parts and reducing torque, it is necessary to consider deviation factors such as temperature dependence of grease viscosity and changes in grease application state after initial and endurance.

Therefore, it was difficult to find a condition that satisfies the above conditions even when switching the film transport speed itself.

(B) In order to form an optimum image on a plurality of types of toner, for example, different color toner materials and special recording materials, the pressing force of the pressure member of the fixing device, that is, the endless film is used. By changing the pressing force of the pressure member that brings the recording material into close contact with the heating element, stable fixing properties may be obtained.

In such a case, since the pressing force is a large load factor for the film conveyance, the switching of the pressing force has a great influence on the shift movement of the film. That is, when the pressing force of the pressurizing member is large, the shift speed of the film is reduced, and there is a high risk that stable reciprocating motion control for keeping the shift movement of the film within a predetermined range is broken.
Further, if the film shift speed is set in accordance with the case where the pressing force is large, the film shift speed increases at once when the pressing force is reduced.

Therefore, also in this case, the same thing as the above (A) can be said in relation to the pressing force, and there is an instability in the film deviation control.

(C) The set fixing temperature is switched so as to obtain the optimum fixing condition in accordance with the type of toner and the type of recording material used, or the set fixing temperature is switched when the apparatus is cold in the morning or the like. In such a case, the shift speed of the film changes depending on the set fixing temperature.

Therefore, in this case as well, the relationship with the fixing temperature is the same as in (A) above, and there is instability in the control of the film deviation.

(D) Kind of toner to be used For example, in the case of a color toner or when a recording material having a special processing is used, in order to form an optimum fixed image,
In the case where the heating value of the heating element is made variable, the same thing as the above (A) can be said in relation to the heating value (heat factor), and the film deviation control is unstable.

The present invention relates to a film heating type heating device using an endless film, which is equipped with the above-mentioned film shift movement control mechanism.
Despite the control instability factors such as (D), wrinkles and folds as film damage do not occur, and film detection errors are prevented in advance, enabling stable film deviation control and conveyance. The purpose is to improve the reliability of the device.

[0026]

The present invention is a heating device characterized by the following constitutions.

(1) It has an endless film and a heating body arranged on the inner surface side of the endless film, and an object to be heated is brought into close contact with the outer surface side of the endless film to convey and pass the position of the heating body together with the film. It is a heating device of the film heating system that gives the heat of the heating body to the heated object through the film, and when the direction orthogonal to the transport direction of the endless film is the film width direction, in the transport process of the endless film. According to the detection information of the film position detection means for detecting the film shift position in the width direction and the detection information of the film position detection means, the shift movement direction of the endless film is switched to make the shift movement of the film endless within a predetermined shift movement range. A film deviation control means for reciprocating motion, a variable control means for transporting the endless film, and a speed variable control means. Heating device, characterized in that it comprises a control means for changing the film toward the moving range of the film shift control means in accordance with the control speed of the unit.

(2) It has an endless film and a heating body arranged on the inner surface side of the endless film, and a heated body is brought into close contact with the outer surface side of the endless film to convey and pass the heating body position together with the film. It is a heating device of the film heating system that gives the heat of the heating body to the heated object through the film, and when the direction orthogonal to the transport direction of the endless film is the film width direction, in the transport process of the endless film. According to the detection information of the film position detection means for detecting the film shift position in the width direction and the detection information of the film position detection means, the shift movement direction of the endless film is switched to make the shift movement of the film endless within a predetermined shift movement range. Film reciprocating control means for reciprocating movement, and pressing for bringing the heated material into close contact with the heating body through the endless film Variable control means and a heating device characterized in that it comprises a control means for changing the film toward the moving range of the film shift control means in response to control the pressing force of the pressing force variable control means.

(3) It has an endless film and a heating element arranged on the inner surface side of the endless film, and an object to be heated is brought into close contact with the outer surface side of the endless film to convey and pass the position of the heating element together with the film. It is a heating device of the film heating system that gives the heat of the heating body to the heated object through the film, and when the direction orthogonal to the transport direction of the endless film is the film width direction, in the transport process of the endless film. According to the detection information of the film position detection means for detecting the film shift position in the width direction and the detection information of the film position detection means, the shift movement direction of the endless film is switched to make the shift movement of the film endless within a predetermined shift movement range. A film deviation control means for reciprocating, a temperature measuring means for detecting the temperature of the heating body, and a temperature measuring means for responding to temperature information of the temperature measuring means. The said heating body having a predetermined Te 1, second and
The heating device is characterized by having temperature control means for controlling the set temperature of .. and control means for changing the film shift movement range of the film shift control means according to the set temperature of the temperature control means. (4) An endless film and a heating element arranged on the inner surface side of the endless film are provided, and a heating object is brought into close contact with the outer surface side of the endless film, and heating is performed by conveying and passing the position of the heating element together with the film. A heating device of a film heating system for applying heat of the body to a heated object through a film, wherein a width direction is a direction orthogonal to a conveying direction of the endless film, and the width direction in a conveying process of the endless film. A film position detecting means for detecting a film shift position to the film and an endless film shift direction is made to endlessly reciprocate within a predetermined shift range according to detection information of the film position detection means. A film deviation control means, a heat generation amount control means for varying the heat generation amount of the heating element, and a fill amount according to the control heat generation amount. Heating apparatus characterized by having a film closer variable speed control means for varying the deviation rate of.

(5) A heating amount control means for varying the heating amount of the heating member to control the heating member to a predetermined first, second, ... Set temperature is provided. Heating device.

(6) It has an endless film and a heating body arranged on the inner surface side of the endless film, and a heated body is brought into close contact with the outer surface side of the endless film to convey and pass the heating body position together with the film. It is a heating device of a film heating system that gives the heat of the heating body to the object to be heated through the film, and when the direction orthogonal to the transport direction of the endless film is the film width direction, in the transport process of the endless film. According to the detection information of the film position detection means for detecting the film shift position in the width direction and the detection information of the film position detection means, the shift movement direction of the endless film is switched to make the shift movement of the film endless within a predetermined shift movement range. Film reciprocating control means for reciprocating movement, and pressing for bringing the heated material into close contact with the heating body through the endless film A heating device comprising a variable force control means and a film shift speed variable control means for changing the film shift speed in accordance with the control pressing force.

(7) It has an endless film and a heating element arranged on the inner surface side of the endless film, and an object to be heated is brought into close contact with the outer surface side of the endless film to convey and pass the position of the heating element together with the film. It is a heating device of the film heating system that gives the heat of the heating body to the heated object through the film, and when the direction orthogonal to the transport direction of the endless film is the film width direction, in the transport process of the endless film. According to the detection information of the film position detection means for detecting the film shift position in the width direction and the detection information of the film position detection means, the shift movement direction of the endless film is switched to make the shift movement of the film endless within a predetermined shift movement range. A film deviation control means for reciprocating motion, a variable control means for transporting the endless film, and a speed variable control means. Heating apparatus characterized by having a film closer variable speed control means for varying the deviation speed of the film in accordance with the control speed of the unit.

(8) The film side speed variable control means is
The heating device according to any one of (4) to (7), wherein the film shift speed is varied by changing the position of the film transport means.

(9) The film shift speed variable control means is
The heating device according to any one of (4) to (7), wherein the deviation speed of the film is varied by changing the tension on the film.

(10) The film shift speed variable control means changes the film shift speed by changing the position of the film contact member other than the film transport means. The heating device according to any one of claims.

[0036]

[Action]

a. As described in (1) above, depending on the transport control speed of the endless film, b. Alternatively, as described in (2) above, depending on the control pressing force, c. Alternatively, as described in (3) above, the film moving speed, the pressing force, or the temperature is changed by changing the “film moving range” in the film moving control according to the set temperature. Also, it is possible to suppress the film shift control reciprocating frequency within a predetermined substantially constant range.

Also, d. As described in (4) above, depending on the heating value of the heating element, e. Alternatively, as described in (6) above, depending on the control pressing force, f. Alternatively, as described in (7) above, by changing the "film shift speed" in the film shift control according to the transport control speed of the endless film, the heating value of the heating element, the pressing force, or the Even if the film transport speed changes, it is possible to keep the frequency of reciprocating film shift control within a predetermined substantially constant range.

As a result, excessive stress on the film can be prevented and wrinkles can be eliminated. In addition, the false detection of the film and the temperature rise of the solenoid can be suppressed to a minimum, and the sliding distance of the film, the heating element, and the heating element supporting member is reduced due to the shift of the moving distance. You can extend the life.
It can be performed without complicating and increasing the size of the film shift control mechanism, and can realize stable film shift control / conveyance for a film heating type heating device using endless film, improving the reliability of the device. Can be made

[0039]

Embodiments <First Embodiment> (FIGS. 1 to 12) This embodiment is an embodiment of the invention described in claim 1.

That is, the apparatus has a variable speed control means for the endless film transport speed and a control means for changing the film shift range of the film shift control means according to the control speed of the speed variable control means.

FIG. 1 is a plan view of an example of a heating device according to the present invention, which is omitted in the middle, FIG. 2 is a side view, and FIG. 3 is a schematic configuration diagram of an example of an image forming device incorporating the heating device as a fixing device.

(A) Configuration of Example of Image Forming Apparatus (FIG. 3) The image forming apparatus shown in FIG. 3 is a reciprocating platen type / rotary drum type / transfer type electrophotographic copying machine. -Because the image forming process, etc. are known, only a brief explanation will be given.

Reference numeral 152 denotes an upper surface plate 151 of the copier machine housing 150.
It is a reciprocating-type original platen glass disposed above, and is reciprocally driven in the left-right direction by a driving mechanism (not shown). The original 153 is placed at a predetermined position on the upper surface of the original platen glass 152 with the image surface to be copied facing downward, and the original is pressed and set by the original press plate 154.

The downward image surface of the set original 153 is subjected to slit illumination scanning by sequentially passing through the illumination unit 155 during the forward or backward movement of the original table glass 52. 1
Reference numeral 56 indicates an illumination light source.

Then, the downward document surface reflected light of the slit illumination light is sequentially image-formed and exposed on the surface of the photosensitive drum 158 which rotates in synchronism with the scanning of the document image by the imaging lens (short-focus image-forming element array) 157.

The photosensitive drum 158 is subjected to a uniform positive or negative charging process by the discharger 159, and then subjected to the above-mentioned image forming exposure, whereby an electrostatic latent image corresponding to the original image is sequentially formed on the drum peripheral surface. Is formed in.

Next, the photosensitive drum 15 on which the latent image is formed
The eight surfaces sequentially pass the position of the developing device 160 and undergo sequential development of latent images. The developed image on the surface of the photosensitive drum 158 reaches the transfer discharger 161 position by the subsequent rotation of the photosensitive drum.

On the other hand, one transfer material P is fed from the transfer material cassette 162 into the copying machine by the paper feed roller 163,
At that time, the pair of registration rollers 1 is in a rotation stopped state
The tip of the nip portion 64 is received. Here, the rotational driving of the registration roller pair 164 is started at a predetermined timing synchronized with the rotation of the photosensitive drum 158,
As a result, the transfer material P is guided by the guide member and is fed toward the photosensitive drum 158, is introduced to the transfer portion between the photosensitive drum 158 and the transfer discharger 161, and is sequentially transferred onto the surface of the photosensitive drum 158. The developed image is transferred.

The copying material P which has received the image transfer is the photosensitive drum 15
The eight surfaces are sequentially separated by separation means (not shown), introduced into the fixing device 1 by the conveying device 165 and subjected to image fixing, and discharged as an image formed product (copy) to the discharge tray 167 outside the machine by the discharge roller 166. To be done.

The surface of the photosensitive drum 158 after the image transfer is cleaned by the cleaning device 168 and is repeatedly used for image formation.

(B) Fixing device 1 (FIGS. 1 and 2) In FIGS. 1 and 2, 13 and 12 are a pair of left and right endless film driving rollers disposed substantially parallel to each other, and a driven roller which also serves as a tension roller. , 11 are endless films suspended between the rollers 13 and 12, and the driving roller 13 is rotated by a driving system including a driving motor 25 in the clockwise direction as indicated by the arrow to indicate the time indicated by the arrow a. Is driven to rotate at a predetermined peripheral speed in the direction.

The film 11 is a heat resistant film having a total thickness of 100 μ, more preferably less than 40 μ. In this embodiment, an endless film having a thickness of about 20 μm such as polyimide, polyetherimide, PES, PFA or the like as a base film and a release layer such as PTFE coated on the image contact surface by about 10 μm is used.

Reference numeral 14 denotes a heating element fixedly arranged (fixedly supported by the fixing device) on the inner surface side of the descending film portion of the endless film 11. This heating element is film 11
Low heat capacity linear heating element (hereinafter referred to as heater) having a longitudinal direction that intersects with the plane movement direction of the film, that is, the film width direction
And generates heat when energized.

Numeral 15 is a pressure roller having a rubber elastic layer having a good releasing property such as silicone rubber.
The film portion on the descending side of the endless film 11 is sandwiched between and by an unillustrated urging means, for example, a total pressure of 4 to 5
The film is brought into pressure contact with a contact pressure of kg, and as the film moves, it rotates in the forward direction in the film moving direction at a peripheral speed substantially the same as the film speed.

A transfer device 165 from the transfer portion 161 (FIG. 3).
The transfer material P having the unfixed toner image t (heat-melting toner) carried to the fixing device 1 on the upper surface is guided to the entrance guide 10 and heated by the heater 14 with the endless film 11 interposed therebetween. The film 11 at the pressure contact portion (fixing nip portion) N formed by the pressure roller 15 and the pressure roller 1
5 and the unfixed image surface comes into close contact with the surface of the film 11 in the state of surface movement in the same direction at substantially the same speed as the conveyance speed of the transfer material P and the fixing nip N in the overlapping state with the film 11. Pass through while receiving the clamping pressure. In this process, the toner image bearing surface of the transfer material P is heated by the heat of the heater 14 through the film 11, and at least the surface layer portion of the toner image t is completely softened and melted and heat-fixed to the surface of the transfer material P. .. When the transfer material P that has passed through the fixing nip portion N then passes through the position of the film driving roller 13, the roller 1
The curvature of the film 11 along 3 separates it from the surface of the film 11.

(C) Film shift control mechanism (see FIGS.
6) The driving roller 13 and the driven roller 12 of the endless film 11 are the side plate 1 on the front side of the fixing device 1 as shown in FIG.
A bearing is disposed between the rear side plate 18 and the rear side plate 18.
Reference numerals 21 and 20 denote a bearing on the front end side and a bearing on the rear end side of the driven roller 12.

Here, the driving roller 13 and the driven roller 1
2, parallelism of heater 14, and pressure roller 15 (X
Unless the accuracy in the axial direction, the Y-axis direction, and the Z-axis direction) is set to ± 0, when the drive roller 13 is driven to rotate the film 11 in the direction of arrow a, the film 11 suspends it. Due to the positional relationship between the three members of the wound rollers 13 and 12 and the heater 14 (variation in each direction of the X, Y, and Z axes), the roller 13 Along the length of the film 12, the film is moved to the right or left in the film width direction, and the side plate 18 or the side plate 19 is rubbed against the edge of the film and damaged.

Therefore, in this embodiment, the bearing 20 on the rear end side of the driven roller 12 is indicated by arrows A and B with respect to the side plate 18.
Is supported with a degree of freedom of movement in the front-rear direction, and is normally urged to move in the forward direction A by the compression spring 22.
Position it with the stopper (not shown)
In addition, the plunger of the solenoid 23 is connected so that the bearing 20 is pulled in the backward direction B against the compression spring 22 when the solenoid 23 is energized to be displaced to the second position indicated by the chain double-dashed line. There is.

That is, energization ON / OFF of the solenoid 23
Drive roller 13 and heater 1 of driven roller 12
The parallelism with respect to 4 can be changed.

In the case of this example, when the solenoid 23 is OFF and the bearing 20 is in the first position shown by the solid line, the rotating film 1
1 is on the suspension tension members 13, 12, and 14 along the length thereof, to the left in the film width direction as a whole, that is, the rollers 13 and 1.
The solenoid 23 turns ON as it moves toward the rear end side of 2
When the bearing 20 is in the second position indicated by the chain double-dashed line, the rotating film 11 moves to the right in the film width direction, that is, toward the front end side of the rollers 13 and 12, contrary to the above.

Reference numeral 16 is a photo sensor for detecting the shift position of the film. Further, as shown in FIG. 1, the end portion 3 on the front side of the film 11 is masked as shown by hatching so as to shield the light from the photosensor 16 around the entire edge.

In this embodiment, the photo sensor 16
Although a photo interrupter is used for the above, when a reflection type photo sensor is used here, the end portion 3 of the film 11 needs to be treated with a reflecting member that reflects light. Further, it may be read by a photo sensor via a movable piece that moves along the edge of the film 11.

In this embodiment, the masking or the like is applied to only one end portion of the film 11, but it goes without saying that it may be applied to the entire film.

Reference numeral 4 denotes a cleaning member at the end of the film, which is constantly cleaned so as to prevent misreading when a reflection type sensor is used due to dirt on the end of the film. There is something. Although felt is used in this embodiment, any kind of felt may be used as long as it has a cleaning effect.

FIG. 4 shows the outer shape of the film 11. This film is an endless belt as described above, and its diameter is φM. Also, as shown in the figure, film 1
One end (end on the front side) of 1 is cut diagonally,
Let Lmax be the length of the longest part and Lm be the length of the shortest part.
If it is in, the dimension of the diagonally cut portion (diagonal cut portion) of the film 11 is obtained by Lmax-Lmin, and here it is designated as ΔL (diagonal film cut amount). As shown in FIG. 1, the oblique cut portion is arranged on the front side of the fixing device so that the photo sensor 16 detects the position of the film 11.

FIG. 5 shows the photo sensor 16 and the film 11.
3 is a detailed view of the positional relationship of FIG. In this embodiment, the photo sensor 16 is a transmissive photo interrupter.
The detection position is indicated by b. This is the photo sensor 16 when the film 11 is on the back side of the position of b.
Will be turned on, and will be turned off when it is on the front side of the position of b. Further, the diagonal cut portion of the film 11 is configured to be at the detection position b.

That is, the film 11 has the arrow a shown in FIG.
The photo sensor 16 repeats ON / OFF by rotating in the direction, and the ON / OFF cycle ratio (dut) varies depending on the film position (closer position).
The y ratio) will be variable.

The film position shown in FIG. 5 represents a reference position where the center of the oblique cut portion of the film 11 is located at the detection position b of the photo sensor 16. The film position and the O of the photo sensor 16 are centered around the reference position of the film.
The graph of FIG. 6 shows the relationship between FF times.

As shown in FIG. 6, when the film 11 is at the reference position b, the OFF time of the photo sensor 16 is c seconds, and the film 11 is located at the front side of the reference position b for ΔL / 2 or more. At this time, the OFF time of the photo sensor 16 is 0 second.

On the other hand, when the film 11 is located at the back side of the reference position b by ΔL / 2 or more, the photo sensor 16
Will continue to be turned off.

O when the position near the film 11 is immediately before the position where the photo sensor 16 is kept off.
The FF time is d seconds, which can be considered to be almost equal to the time it takes for the film 11 to make one round, and the OFF time c second at the reference position b is the center of the film diagonal cut portion. The time is almost half of d seconds.

(D) Film shift control circuit (FIG. 7) FIG. 7 is a schematic diagram of a control system.

Reference numeral 26 is a microcomputer, and the photosensor 16 is connected to its input terminal IN1. The solenoid 23 is connected to the output terminal OUT1. A rotation control signal for the motor 27 that drives the main body of the copying machine is output to the output terminal OUT2.

A + 5V power source is connected to the VDD terminal,
The GND terminal is connected to the ground.

Although not shown, the copying machine using the fixing device 1 is provided with other input and output signal terminals, and the microcomputer 26 is provided with terminals for copying operation of the copying machine. In addition to a ROM and a RAM in which a sequence program and the like are programmed, a nonvolatile RAM that retains the stored contents even if the power supply to the microcomputer 26 is cut off is built in.

Reference numeral 28 is a control circuit for controlling the film speed (film rotation conveyance speed) of the fixing device 1, and controls the speed of the motor 25 to control the film speed. The motor 25 is configured to drive the film 11 independently of the main motor 27 of the copying machine body.

The signal 31 is a film drive control signal input from the microcomputer 26 to the control circuit 28, and drives the film as required in the copying sequence.

The signal 30 is a signal indicating the film speed control state performed by the control circuit 28. When the signal 30 is "H",
The control circuit 28 indicates that the control is performed at the film speed 1, and when "L", the control is performed at the film speed 2 slower than the film speed 1. Microcomputer 26 receives signal 30 at input port IN2 to determine film speed. The control circuit 28 switches the film speed according to a condition signal such as toner (not shown).

(E) Control program (FIGS. 8 to 12) FIGS. 8 to 11 show the flow charts of the film shift movement control program of the fixing device 1.

This program is also programmed in the built-in ROM in the above-mentioned microcomputer 26, and is executed by a main sequence program or the like at fixed time intervals or as needed. It is like this.

First, after the start, in step 1 (FIG. 8), it is judged whether or not the motor 25 is ON. If the motor 25 is turned on here,
The process proceeds to step 2, and a subroutine for determining the film deviation control range according to the paper size (transfer material width size) is called. If the motor 25 is off, the process returns to step 1 and waits until the motor 27 is turned on.

Next, in step 2, it is judged whether or not the film has been controlled so far so as to be closer to the front side. This sets the content of a predetermined address on the non-volatile RAM in the microcomputer 26 as a front side flag, and when the state of the memory is 1, that is, when the front side has been controlled so far, step 3, the solenoid 23 is turned on, the deviation control is set to the front side, and the step 4
Move to. In step 2, the front side flag is 0.
In the case of, since the film has been controlled so far so as to approach the back side, the process proceeds to step 4 as it is.

In step 4, it is judged whether or not the sensor 16 is OFF. If the sensor 16 is ON, the process proceeds to step 8, and if it is OFF, the process proceeds to step 5.

In step 5, the value of the error timer is reset to 0, measurement is started, and the process proceeds to step 6.

In step 6, it is judged whether or not the sensor 16 is ON. If it is not ON, step 7
Move to.

In step 7, the error check routine is executed and the process returns to step 6.

The contents of the error check routine will be described with reference to FIG. 10. First, in step S1, it is determined whether or not the motor 27 is ON. If the motor 27 is ON, the process proceeds to step S2. 1
3 (FIG. 9).

In step S2, it is judged whether or not the error timer value is larger than d seconds, and if it is smaller, the process goes to the exit of this routine. If the error timer value is greater than d seconds in step S2, the process proceeds to step S3. In step S3, an error flag is set and the routine exits.

Next, if the sensor 16 is ON in step 6, the process proceeds to step 8, the value of the error timer is reset to 0, measurement is started, and the process proceeds to step 9.

In step 9, it is judged whether or not the sensor 16 is OFF. If it is not OFF, the process proceeds to step 10, the error check routine is executed, the process returns to step 9, and if the sensor 16 is OFF, the step is performed. 11, the value of the timer 1 is reset to 0, measurement is started, and the process proceeds to step 12 (FIG. 9).

In step 12, it is judged whether or not the motor 25 is ON. If it is ON, step 14
Move to.

In step 14, it is judged whether or not the sensor 16 is ON. If it is not ON, the process proceeds to step 15 to execute an error check routine and returns to step 14, and if it is ON, the process proceeds to step 16. ..

In step 16, the measured value of timer 1 is
The comparison is made to see if it is smaller than the front side reversal position.
This front-side reversal position is a value that is determined by a subroutine described later and indicates a position at which the film 11 is switched from the front-side direction to the back-side direction. If the timer 1 is small here, it can be determined that the film 11 is located on the front side, and therefore the process proceeds to step 17, the solenoid 23 is turned off to switch the deviation direction of the film 11 to the back side, and the front flag is reset to 0. Then, the process proceeds to step 20.

If the measured value of the timer 1 is not smaller than the front side reversal position in step 16, step 1
Move to 8.

At step 18, the measured value of the timer 1 is
A comparison is made as to whether or not it is larger than the back side reversal position, and the back side reversal position here indicates the position at which the film is switched from the back side to the front side. Step 2 if not large
When it is larger than 0, it can be determined that the film 11 is located on the back side. Therefore, the process proceeds to step 19, the solenoid 23 is turned on to switch the deviation direction of the film 11 to the front side, and the front flag is set to 1. Step 20
Move to.

At step 20, the value of the error timer is set to 0.
Then, the measurement is started and the process proceeds to step 21.

In step 21, it is judged whether or not the sensor 16 is off. If not, the process proceeds to step 22 to execute an error check routine,
Return to step 21.

If the sensor 16 is OFF in step 21, the process proceeds to step 23, in which the value of the timer 1 is reset to 0 and measurement is started, and the process returns to step 12.

When the motor 27 is off in step 12, the process proceeds to step 13 and the timer 1
Stop the measurement of and reset the measured value to 0,
Next, the solenoid 23 is turned off, and the process returns to step 1.

Next, a subroutine for determining the above-mentioned front side reverse position and back side reverse position will be described. The subroutine shown in FIG. 11 is a subroutine called as needed, and first, in step S4, the value of the input port IN2 is determined.
When IN2 is "H" in step S4, that is, the control circuit 2
When the control unit 8 controls the film speed at 1, the process proceeds to step S5.

In step S5, the rear side inversion position is set to 3 / 4d.
Then, set the front side reversal position to 1 / 4d and exit to the exit.

Further, when it is "L" in step S4, that is, when the control circuit 28 is controlling at the film speed 2, the process proceeds to step 6.

In step 6, the rear side inversion position is set to 3 / 5d.
Then, set the front side reversal position to 2 / 5d and exit to the exit.

FIG. 12 shows a flow chart of a film abnormality processing program which is a part of the main program. Here, it is determined in step 24 whether or not the error flag is set, and if it is not set, the process goes to the exit and the next main sequence program is executed.

If the error flag is set in step 24, the process proceeds to step 25, all outputs of all devices (copiers in this embodiment) are turned off, and then the process proceeds to step 26. Abnormality is displayed and step 26 is set as a permanent loop so that the main program cannot be executed.

As described above, the fixing film is infinitely reciprocated within the control range corresponding to the film speed.

According to this embodiment, by providing the control means for varying the film deviation control range in accordance with the film conveying speed, even if the film deviation speed changes due to the change of the film conveying speed, Stable deviation control is possible without giving excessive stress to the film.

In the present embodiment, a transmissive photosensor was used as the sensor 16, but the same applies to the case where a sensor such as a microswitch or a reflective photosensor is used. You can have it.

Although this embodiment has a non-volatile RAM, the volatile R is controlled by controlling in a predetermined direction when the power is turned on.
You can go by AM.

The back side inversion position and the front side inversion position may be changed at independent timings depending on the film speed.

In this embodiment, the film speeds are 1 and 2 respectively, but a large number may be set depending on the conditions of the toner and the like. In that case, the same can be done by having the signal 30 in a plurality of pits.

Although the control circuit has been described as a microcomputer, it may be composed of other logic circuits.

In this embodiment, from the film speed control circuit,
Although the control state signal is output, the drive roller 13 may be provided with an encoder and the speed of the drive roller 13 may be detected by a microcomputer for control.

Further, instead of providing an encoder on the driving roller 13, a pattern for detecting the speed at the edge of the film,
The same applies when the film speed is detected by the sum of the ON time and the OFF time of the sensor 16.

The same applies when the film speed control circuit and the shift control circuit (including the microcomputer 26) are configured in the same manner.

The same applies not only to a copying machine that varies only the film speed, but also to a device that varies with the speed of the copying machine main body.

<Second Embodiment> (FIGS. 13 to 14) This embodiment is another example of the film position detecting means.

FIG. 13 is a plan view of the fixing device 1 with the intermediate portion omitted. The same members and portions as those of the above-described device of FIG.

103/104/105/106/107
Numeral 108 is a photo sensor for detecting the position of the film.

The sensors 105 and 106 are the sensor 103.
The sensor 107.1 is installed so as to detect the film position inside the film detection position of 104.
08 is installed so as to detect the film position outside the film detection positions of the sensors 105 and 106.

The both ends 3 and 3'of the film 11 are masked so as to block the light of the photosensor.

In this embodiment, a photo interrupter is used as the photo sensor, but when a reflection type photo sensor is used here, both end portions 3 and 3 of the film 11 are
It is necessary to process the reflective member so as to reflect light at the part '. Further, in the present embodiment, the masking process is performed only on both ends, but it goes without saying that it may be applied to the entire film. Further, it may be read by a photo sensor via a movable piece that moves along the edge of the film. 101 and 102 are cleaning members for the edge of the film.

Other structures are the same as those in the <first embodiment>.

FIG. 14 shows a deviation control flow chart of this embodiment. This program is designed to be executed at fixed time intervals as in the case of the <first embodiment>, or when called by a main sequence program or the like as needed.

After the start, it is first determined in step 201 whether the motor 25 is ON. When the motor 25 is ON, the process proceeds to step 202.

In step 202, it is determined whether the front flag is ON. When ON, it is controlled to move to the front side. If it is ON, the process proceeds to step 203.

At step 203, the sensor 107 is turned on.
Judge whether or not. When it is ON, it is determined that it has moved to the back side regardless of the control to the front side, the process proceeds to step 204, the error flag is set, and the process proceeds to step 214.

At step 214, the solenoid 23 is turned off.
F, reset the front flag and exit to the exit. If the sensor 107 is OFF in step 203, the process proceeds to step 206.

At step 206, the state of the input IN2 of the signal 30 indicating the film speed is judged. If IN2 is "H", the process proceeds to step 207.

At step 207, the sensor 106 is turned off.
Judge whether N or not. When the sensor 106 is OFF, it exits to the exit. When the sensor 106 is ON, it is determined that the vehicle has come closer to the front side, the process proceeds to step 209, the solenoid 23 is turned on, the front flag is reset, and the process exits to the exit.

When IN2 is "L" in step 206, the process proceeds to step 208. In step 208, it is determined whether the sensor 104 is ON. When it is off, it exits to the exit. If it is ON, it is determined that the vehicle has come closer to the front side, and the process proceeds to step 209.

In step 202, the front flag is turned off.
If so, the process proceeds to step 205. In step 205, it is determined whether the sensor 108 is ON. When it is ON, it is determined that it has moved to the front side even though it is controlled to the back side, the process proceeds to step 204, an error flag is set, and the process proceeds to step 214.

In step 205, the sensor 108 is turned off.
In the case of, the process proceeds to step 211. In step 211, the state of the input IN2 of the signal 30 indicating the film speed is judged. If IN2 is "H", the process proceeds to step 212.

At step 212, the sensor 105 is turned on.
Determine whether or not. When the sensor 105 is OFF, it exits to the exit. When the sensor 105 is ON, it is determined that the vehicle has come to the back side, and the process proceeds to step 214.

At step 214, the solenoid is turned off.
Then set the front flag and exit to the exit. When IN2 is "L" in step 211, the process proceeds to step 213.

At step 213, the sensor 103 turns off.
Judge whether N or not. When it is off, it goes through the exit.
If it is ON, it is judged that the vehicle has come to the back side, and step 21
Go to 4.

In the present embodiment, as in the first embodiment, even if the film shift speed changes due to the change in the film transport speed, stable shift control can be performed without giving excessive stress to the film.

<Third Embodiment> (FIGS. 15 and 16) This embodiment is an embodiment of the invention of claim 2.

That is, in a device having a pressing force variable control means for bringing the heated body into close contact with the heating body via the endless film, and a control means for changing the film displacement movement range of the film displacement control means in accordance with the pressing force. is there.

FIG. 15 shows the film 11 or the film 1.
1 shows an example of a variable control means of the pressing force (pressing force) that brings the recording material into close contact with the heating body 14 via 1.

The pressure roller 15 is biased by a pressure lever 33 that rotates with one end as a fulcrum 33a and a pressure spring 35 provided at the other end of the pressure lever 33. The pressure spring 35 is linked to the lever 34. The lever 34 is rotationally driven by the motor 32, and when the motor 32 rotates in the C direction, the pressing force decreases. Also, D
When it rotates in the direction, the pressing force increases.

When the applied pressure is large, the load of film transport increases, and the film shift speed decreases. or,
On the contrary, when the pressing force is small, the shift speed of the film becomes faster.

Example of image forming apparatus (FIG. 3), fixing device 1
(FIGS. 1 and 2), a structure other than the pressing force variable control means portion, a film-side movement control mechanism (FIGS. 1, 2, 4, 5, ...
The configuration of 6) is the same as the above-mentioned <first embodiment>.

FIG. 16 is a schematic diagram of an electric control system in the present embodiment. The parts common to those in FIG. 7 are designated by the same reference numerals and their repeated description will be omitted.

In FIG. 16, reference numeral 36 is a control circuit for controlling the pressing force, which controls the rotational position of the motor 32 to control the pressing force.

The signal 37 is a signal indicating the pressing force control state performed by the control circuit 36. When the signal 37 is "H", it indicates that the control circuit 36 is controlling with the pressing force 1, and when it is "L", it is controlling with the pressing force 2 which is stronger than the pressing force 1. The microcomputer 26 inputs the signal 37 at the input port IN2 to judge the applied pressure. Control circuit 36
Switches the pressing force according to a condition signal such as toner (not shown).

The film shift control program is the same as that shown in FIGS. 8 to 12 of the <first embodiment>. However, in the subroutine for determining the front side inverting position and the back side inverting position in FIG. 11, the “H” and “L” signals are the same as those in FIG.
The pressure control circuit 36 of FIG.

That is, in FIG. 11, first, in step S
At 4 the value of the input port IN2 is determined. Step S4
When IN2 is “H”, that is, the control circuit 36 (FIG. 16)
Is controlled by the pressing force 1, the process proceeds to step S5.

In step S5, the rear side inversion position is set to 3 / 4d.
Then, the front side reversal position is set to 1 / 4d and the vehicle exits to the exit.

Further, when it is "L" in step S4, that is, when the control circuit 36 is controlling with the pressing force 2, step S6.
Move to.

In step 6, the reverse position on the back side is set to 3 / 5d.
Then, set the front side reversal position to 2 / 5d and exit to the exit.

As described above, the fixing film is reciprocated infinitely within the control range according to the pressure applied by the fixing device.

By providing a control range in which the film deviation control range is variable according to the pressing force of the fixing device, even if the film deviation speed changes due to the difference in the pressing force, the film deviation control reciprocation is performed. The frequency can be suppressed within a substantially constant range, and stable deviation control can be performed without applying excessive stress to the film.

In this embodiment, there are two pressures, 1 and 2, but a large number may be set depending on the conditions of the toner and the like. In that case, the same can be done by having the signal 37 with a plurality of bits.

Although the control circuit has been described as a microcomputer, it may be composed of other logic circuits.

In this embodiment, from the film speed control circuit,
Although the control state signal is output, a sensor for detecting the position of the lever 34 or the pressure lever 33 may be provided to control the pressure by determining the pressure.

The same applies when the pressurizing force control circuit and the shift control circuit (including the microcomputer 26) are configured in the same manner.

<Fourth Embodiment> (FIGS. 13 and 14) This embodiment is also an embodiment of the invention described in claim 2, and the film position detecting means shown in FIG. 13 of the above-mentioned <Second Embodiment>. 14 is controlled by the shift control flow of FIG. 14, in step 206, the state of the input IN2 of the signal 37 (FIG. 16) indicating the pressing force is determined.

Also in step 211, the state of the input IN2 of the signal 37 indicating the pressing force is judged.

Other than that, the control is the same as in the second embodiment.

Also in this embodiment, similarly to <Third Embodiment>, even if the film shift speed changes due to the difference in the pressing force of the fixing device, stable shift control is possible without giving excessive stress to the film. Becomes

<Fifth Embodiment> (FIG. 17) This embodiment is an embodiment of the invention of claim 3.

That is, the temperature measuring means for detecting the temperature of the heating body, and the temperature control means for controlling the heating body to the predetermined first, second, ... Set temperature according to the temperature information of the temperature measuring means. And a means for changing the film shift range of the film shift control means according to the set temperature of the temperature control means.

Example of image forming apparatus (FIG. 3), fixing device 1
(Figs. 1 and 2) configuration, film shift control mechanism (Fig. 1
The configuration of (2, 4, 5, 6) is the same as that of the above-mentioned <first embodiment>, and thus the repetitive description will be omitted.

FIG. 17 is a schematic diagram of an electric control system in the present embodiment. The parts common to those in FIG. 7 are designated by the same reference numerals and their repeated description is omitted.

In FIG. 17, reference numeral 38 denotes a control circuit for controlling the temperature of the heater (heating body) 14 of the fixing device,
The value of the thermistor TH1 for detecting the temperature of the heater 14 is input by the analog input AN1, and the control signal 40 is output to the heater energizing circuit 39.

A signal 41 is a temperature control signal input from the microcomputer 26 to the control circuit 38, and is adapted to energize the heater 14 as necessary in the copying sequence.
The signal 42 is a signal indicating the heater temperature control control state performed by the control circuit 38.

When the signal 42 is "H", it indicates that the control circuit 38 is controlling at the controlled temperature 1, for example, 180 ° C.
When "L", the temperature control temperature 2 is higher than the temperature control temperature 1, for example, 2
This indicates that the control is performed at 00 ° C.

The microcomputer 26 inputs the signal 42 through the input port IN2 and judges the temperature control temperature. The control circuit 38 switches the temperature-controlled temperature according to a condition signal such as the type of toner or the morning (not shown).

When the controlled temperature is high, the temperatures of the driving roller 13 and the driven roller 12 are high, and the coefficient of friction with the film 11 is low. As a result, the shift speed of the film becomes slow. On the contrary, when the temperature control temperature is low, the shift speed becomes faster.

The film shift control program is the same as in FIGS. 8 to 12 of the <first embodiment>. However, in the subroutine for determining the front side inverting position and the back side inverting position in FIG. 11, the "H" and "L" signals are the signals of the temperature control temperatures 1 and 2 described above in this embodiment.

That is, in FIG. 11, first, in step S
At 4 the value of the input port IN2 is determined. Step S4
When IN2 is “H”, that is, the control circuit 38 (FIG. 17)
Is controlled by the temperature-controlled temperature 1, the process proceeds to step S5.

In step S5, the rear side inversion position is set to 3 / 4d.
Then, the front side reversal position is set to 1 / 4d and the vehicle exits to the exit.

Further, when it is "L" in step S4, that is, when the control circuit 38 controls the temperature control temperature 2, the step S4 is performed.
Go to 6.

At step 6, the rearward reversal position is set to 3 / 5d.
Then, set the front side reversal position to 2 / 5d and exit to the exit.

As described above, the fixing film is reciprocated infinitely within the control range according to the temperature controlled by the heater 14 of the fixing device.

By providing a control means for varying the film deviation control range in accordance with the temperature control temperature of the heating element, the film deviation speed changes due to the friction coefficient change and the grease viscosity change due to heat factors. Even if the film shift control reciprocation frequency can be suppressed within a substantially constant range, stable shift control can be performed without applying excessive stress to the film.

In this embodiment, there are two temperature control temperatures 1 and 2, but a large number may be set depending on the conditions of the toner and the like. In that case, the same can be done by having the signal 42 with a plurality of bits.

The same applies when the film speed control circuit and the shift control circuit (including the microcomputer 26) are constructed in the same manner.

<Sixth Embodiment> (FIGS. 13 and 14) This embodiment is also an embodiment of the invention described in claim 3, and the film position detecting means shown in FIG. 13 of the above-mentioned <second embodiment>. 14 is controlled by the deviation control flow of FIG. 14, in step 206, the state of the input IN2 of the signal 42 (FIG. 17) indicating the controlled temperature is determined.

Also in step 211, the state of the input IN2 of the signal 42 indicating the controlled temperature is judged.

Other than that, the control is similar to that of the <second embodiment>.

Also in this embodiment, similarly to the <fifth embodiment>, even if the film shift speed changes due to the difference in the temperature control temperature of the fixing device, stable shift control can be performed without giving excessive stress to the film. It will be possible.

<Seventh Embodiment> (FIGS. 18 to 33) This embodiment is an embodiment of the invention of claims 4 and 5.

That is, the apparatus has heat generation amount control means for changing the heat generation amount of the heating element and film shift speed variable control means for changing the film shift speed according to the control heat generation amount.

The example of the image forming apparatus and the like are the same as those in the <first embodiment>, and therefore the repetitive description will be omitted. (1) First, various types of film-side speed varying control means will be exemplified. The same components and parts as those in FIGS. 1 and 2 of the above-mentioned <first embodiment> are designated by the same reference numerals, and the repetitive description thereof will be omitted.

(A) Part 1 (FIGS. 18 and 19) In FIGS. 18 and 19, a swing lever (fork lever) for displacing the roller 12 is provided at the shaft end 12a of the tension roller (driven roller) 12. 43 is rotatably provided, and the swing lever 43 is driven by a stepping motor 44. This stepping motor 44
Is rotated in the clockwise direction, the tension roller 12 is displaced in the direction of the arrow P, and is rotated in the counterclockwise direction to be displaced in the direction of the arrow Q. At this time, depending on the displacement direction of the tension roller 12, the fixing film 11 shifts in the direction of arrow P in the direction of arrow P and in the direction of arrow Q in the direction of arrow C. As a result, although not shown in the drawing, the position of the fixing film 11 is detected by the film position detecting means (film shift movement control mechanism) including the same sensor 16 as in the above-described <first embodiment>, and the film shift direction is detected. Infinite reciprocation of the film is performed by changing the. This is the basic configuration of the deviation control.

It is known that the deviating speed of the fixing film 11 becomes faster when the displacement amount is increased and becomes slower when the displacement amount is decreased. Therefore, in this example, as shown in FIG. 19, the swing lever 43 in FIG.
Set so that the slide can be switched in the direction of. That is, as shown in FIG. 19A, if the swing lever 43 is moved in the direction of arrow D, the amount of displacement of the tension roller 12 is increased, and the film shift speed can be increased, and FIG.
As shown in the figure, if the swing lever 43 is moved in the direction of arrow E, the amount of displacement of the tension roller 12 is reduced, and the film shift speed can be reduced.

Although the mechanism for switching the swing lever 43 to slide between the D and E directions is omitted, a mechanism including the stepping motor (63) may be used.

However, when the amount of heat generated by the heating element (heater) 14 (hereinafter referred to as "controlled temperature") is high, as described above, the driving roller 13 and the tension roller 12 are used.
Temperature becomes higher, and the coefficient of friction with the film 11 is further lowered. Then, if the displacement amount shown in FIG. 19 is uniform,
The film shift speed decreases or runs backwards.

On the contrary, when the temperature control temperature is low, the friction coefficient does not decrease, so that the strong offset force, that is, the film offset speed increases. In particular, when grease is present on the inner surface of the film, it becomes more remarkable. Therefore, when the temperature control temperature is high, the swing lever 43 is controlled to move in the direction of arrow D in FIGS. 18 and 19 (a), and when the temperature control temperature is low, the movement is controlled to move in the direction of arrow E. The film is reciprocated with a substantially constant deviation control while suppressing the above-mentioned thermal change in the film deviation speed as much as possible.

(B) Part 2 (FIG. 20) In this example, the swing lever 46 is driven via the solenoid 45. The rotation fulcrum 46a of the rocking lever 46 can be moved by the movement of the fulcrum member 47, whereby the displacement amount of the tension roller 12 can be changed.

Although the displacement amount is changed in the vertical direction in the first example of (A) and this example, it is of course effective to change only one side and adjust the deviation speed of only one side. Yes, especially when passing small size paper on the one-sided basis, the non-paper-passing side heats up, and the balance of the film deviation speed is disturbed.In this case, it is necessary to adjust by changing the displacement amount on one side. is there. Furthermore, in the first example of (A), even if the rotation angle of the stepping motor 44 is changed by an appropriate control means, the displacement amount of the tension roller 12 can be changed.

(C) Part 3 (FIG. 21) In this example, the tension roller 12 is displaced by rotating the rotation lever 48 that holds both ends of the tension roller 12. This example can be said to be a more effective method because the displacement amount occurs in both the front side and the back side as compared with the case of the first example.

(D) Part 4 (FIG. 22) This example uses the eccentric cam 49. That is,
A rotatable eccentric cam 49 is provided at the shaft end of the tension roller 12, and the displacement amount of the tension roller 12 is controlled by the stop position of the eccentric cam 49. A drive switching means such as a clutch (not shown) is provided on the rotary shaft of the eccentric cam 49, and the projection 50 for switching control is controlled by the solenoid 51 to determine the stop position of the eccentric cam 49.

By driving the solenoid 51 from the position shown in FIG. 22 (a), the protrusion 50 moves to the control lever 5
2 is disengaged, and at that time, the eccentric cam 4 is driven by the drive switching means.
The drive to 9 is transmitted, and it rotates in the direction of arrow F. Next, when the solenoid 51 is released, the control lever 52 engages with the protrusion 50 and the rotation of the eccentric cam 49 stops,
(B) Locked at the position shown.

By providing a large number of the projections 50, the stop position of the eccentric cam 49 can be locked in multiple stages, whereby the displacement amount can be set in multiple stages.

(E) Part 5 (FIG. 23) In this example, the eccentric cam 49 is directly driven by the stepping motor 44 to stop it continuously.

(F) Part 6 (FIG. 24) In this example, the eccentric cam 49 and the swing lever 43 are combined.

(G) Part 7 (FIG. 25) In this example, the guide portion 54 provided with the rack 53 is displaced by the pinion gear 55 to displace the tension roller 12.

(H) Part 8 (FIG. 26) In this example, the tension roller 12 is displaced by driving the lever 57 by the wire rope 56.

(I) Part 9 (FIG. 27) In this example, the cam 49 and the pressing spring 58 are used to change the film tension difference of the fixing film 12.

(J) Part 10 (FIG. 28) In this example, the axial distance between the drive roller 13 and the tension roller 12 is changed by the stepping motor 44 and the fork 59.

(K) Part 11 (FIG. 29) In this example, the stepping motor 44 and another deviation control roller 60 which is also used as a film surface cleaning roller and which is swung by the fork 59 are used.

(L) Part 12 (FIG. 30) In this example, the tension roller 12 is displaced by the solenoid 61.

(M) Part 13 (FIG. 31) In this example, the tension roller 12 is displaced by the solenoid 61 via the swing lever 62. (2) Control (FIGS. 32 and 33) In this example, the film variable control means shown in FIGS. 18 and 19 is used.

The electrical control unit of this embodiment will be described. Figure 32
FIG. 4 is an electric control block diagram of the present embodiment.

Reference numeral 26 is a microcomputer, which has a sensor 1 for detecting the film position at its input port IN1.
6 (FIG. 1, FIG. 2, FIG. 5) are connected. OUT1 has a stepping motor 4 for rotating the swing lever 43.
The control signal 4 is output, and the rotation direction is determined by the OUT1 excitation signal. Swing lever 4 for OUT2
A stepping motor 63, which has a mechanism for sliding 3 in the direction of D⇔E, is connected. Further, it has terminals for other input signals and other output signals of the copying machine using the fixing device, and performs the copying operation of this copying machine.

Reference numeral 64 denotes a control circuit for controlling the temperature (controlled temperature) of the heating body 14 of the fixing device. The heating circuit 14 is energized through the energizing circuit 65 and is placed close to the heating body 14. The temperature of the heating element is controlled by the thermistor 66.

A signal 67 is a temperature control signal for the heating element 14 which is input from the microcomputer 26 to the control circuit 64 so that the heating element is energized as necessary in the copying sequence. The signal 68 is a signal indicating the temperature control control state of the heating body 14 performed by the control circuit 64.

When the signal 68 is "H", it indicates that the control circuit 64 is controlling at the controlled temperature 1, and when it is "L", it is controlled at the controlled temperature 2 lower than the controlled temperature 1. It is shown that. The control circuit 64 switches the temperature control temperature according to a condition signal such as toner (not shown).

Further, the microcomputer 26 moves the motor 44 so that the tension roller 12 is displaced in the Q direction (FIG. 18) when it is judged by the signal of the sensor 16 that the film is closer to the front side. At this time, the motor 44 is moved until it hits the end. Also, sensor 1
When it is determined by 6 that the film is closer to the back side, the motor 44 is moved so that the tension roller 12 is displaced in the P direction.

Next, the control of the stepping motor 63 of the microcomputer 26 will be described. FIG. 33 is a control flowchart of the stepping motor 63. This program is a subroutine called by the copier sequence program as needed or at regular intervals.

First, at step 1, it is judged whether the main body of the copying machine and the main motor (not shown) for driving the film are ON. When it is OFF, the process returns to step 1. When it is ON, the process proceeds to step 2.

Step 2 is a subroutine for performing the initial operation of the stepping motor 63. The motor 63 is moved so that the swing lever 43 moves in the E direction ((b) of FIGS. 18 and 19), and the swing lever 43 is moved. It abuts against the abutting member and causes the motor 63 to lose synchronization. Hereinafter, the step position of the motor 63 is controlled with this position as the origin.

The process proceeds to step 3 and the input IN2 is "H".
Judge whether or not. When it is "H", it is judged that the temperature is controlled by the controlled temperature 1, and the process proceeds to step 4.

In step 4, the swing lever 43 is moved in the D direction (see FIG. 1) until the step position of the motor 63 reaches 40 steps.
8, and move to (a) of FIG. Then, the temperature control flag is set and the process proceeds to step 8. When IN2 is "L" in step 3, the process proceeds to step 6. In step 6, the step position of the motor 63 is moved to 20,
The temperature control flag is reset and the process proceeds to step 8.

At step 8, it is determined whether the main motor is ON. When it is OFF, the procedure returns to step 1. At this time, all the phase excitation of the stepping motor 63 may be turned off. When it is ON in step 8, the process proceeds to step 9.

At step 9, it is determined whether the temperature adjustment flag and the direction of IN2 are the same. At the same time, the process returns to step 8 to determine whether the main motor is ON. When they are not the same in step 9, the process proceeds to step 10.

In step 10, the stepping motor 6
The initial operation of No. 3 is performed, the process returns to Step 3, and the step position of the motor 63 is controlled according to the new temperature adjustment.

As described above, the amount of displacement of the tension roller 12 can be controlled by controlling the temperature.

That is, according to the change in the amount of heat generated by the heating element 14,
Equipped with a means for controlling the film deviation speed varying means, it minimizes deviations due to thermal factors such as friction coefficient changes and grease viscosity changes, and always provides a stable deviation speed and film conveyance. It was effective in realizing.

In this embodiment, there are two temperature control temperatures 1 and 2, but a large number may be set depending on the conditions of the toner and the like. In that case, the same can be done by having the signal 68 (FIG. 32) in a plurality of pits.

In this embodiment, the rocking lever 43 is moved by the stepping motor 63 so as to move D / E. However, since the motor 44 for rotating the rocking lever 43 is a stepping motor, the step position of the motor 44 is directly controlled. May be.

The same applies when the motor 44 is a stepping motor and the step position is controlled in the configuration of FIG.

In the configuration of FIG. 22, instead of controlling the position of the stepping motor 63, the solenoid 51
The same can be realized by controlling the position of the eccentric cam by controlling the number of times of turning on.

Although the control circuit is described as a microcomputer, it may be configured by another logic circuit.

<Eighth Embodiment> (FIGS. 34 to 36) This embodiment is an embodiment of the invention of claim 6.

That is, the pressing force variable control means for bringing the recording material P as the material to be heated into close contact with the heating body (heater) 14 through the endless film 11, and the deviation speed of the film depending on the control pressing force. It is an apparatus having a film shift speed variable control means.

The image forming apparatus is described above in the first embodiment.
Is the same as.

(1) Mechanism Configuration (FIG. 34) In FIG. 34, the same reference numerals are given to the same components and parts as those in FIGS. 1 and 2 of the <first embodiment>, and the repetitive description will be omitted. To do.

The recording material P is placed on the heating element 1 through the film 11.
The pressure roller 15 as a pressure member that is in pressure contact with the pressure roller 4 is biased by a pressure lever 33 that rotates about one end 33a as a fulcrum and a pressure spring 35 provided at the other end of the pressure lever 33. Has been done.

A swing lever 43 for displacing the tension roller (following roller) 12 is rotatably provided as a film deviation control means, and a stepping motor 44 is provided.
Driven by. That is, by this, one end of the tension roller 12 is vertically displaced as in the case of FIG. 19 and the film position detecting means similar to the above-mentioned <first embodiment> allows the film 11 to move infinitely. It controls the reciprocating motion.

Further, the stepping motor 44 is provided so as to be slidable with respect to the guide portion 69 as shown in FIG. The displacement can be increased by sliding in the D direction as shown in (a), and can be reduced by sliding in the E direction as shown in (b). The amount of displacement and the deviation speed change in a proportional relationship.

The stepping motor 44 is set to D⇔E.
Although the mechanism for switching the slide in the direction is omitted, a mechanism including a stepping motor (63) may be used.

The stepping motor 44 is connected to one arm of the pressure switching lever 70.
Is rotatable about a pressure adjusting knob 71 as a fulcrum, and the other arm 70a of the lever 70 is engaged with the other end of the pressure spring 35 of the pressure lever 33. A stepping motor 73 rotates the pressure adjusting knob 71.

By rotating the knob 71 in the clockwise direction as shown in (a), the pressing force increases and the displacement increases,
By rotating it counterclockwise as shown in (b), the pressing force is reduced and the displacement amount is also reduced.

In other words, when the applied pressure is large and the load on the film conveyance is large, the tension roller 12
It is possible to increase the displacement amount of, and to reduce the displacement amount in the opposite case, and as a result, even if the pressing force is changed,
It is possible to make the film shift speed substantially constant.

Needless to say, the mechanism for switching the pressing force is not limited to this embodiment, and the setting of the pressing force and the displacement amount can be easily determined by each device. The film shifting speed varying means may be configured by the swing lever 43, the stepping motor 44 and the like in this example, and may also be configured as shown in FIGS.

(2) Control (FIGS. 35 and 36) FIG. 35 is an electric control block diagram of this embodiment. 26
Is a microcomputer, and its input port IN1
The film position sensor 16 (Figs. 1 and 2)
5) is connected. Swing lever 43 for OUT1
A control signal of the stepping motor 44 for rotating the is output, and the rotation direction is determined by the OUT1 excitation signal. A mechanism 63 for sliding the swing lever 43 in the D↔E direction is connected to OUT2.

Further, the copying machine using this fixing device has terminals for other input signals and other output signals, and performs the copying operation of this copying machine.

Reference numeral 72 denotes a control circuit for controlling the pressing force of the fixing device, which controls the step position of the motor 73 for rotationally driving the pressure adjusting knob 71 to control the pressing force of the fixing device.

A signal 74 is a signal indicating the fixing device pressure control state performed by the control circuit 72. When the signal 74 is "H", it indicates that the control circuit 72 is controlling with the pressing force 1, and when it is "L", it is controlling with the pressing force 2 which is weaker than the pressing force 1.

The control circuit 72 switches the pressing force according to a condition signal such as toner (not shown). Further, the microcomputer 26 moves the motor 44 so that the tension roller 12 is displaced downward when it is determined by the signal of the sensor 16 that the film is closer to the front side. At this time, the motor is moved until it hits the abutting member. or,
When it is determined by the sensor 16 that the tension roller 12 is closer to the back side, the motor 44 is moved so that the tension roller 12 is displaced upward.

Next, the control of the stepping motor 63 of the microcomputer 26 will be described.

FIG. 36 is a control flowchart of the stepping motor 63. This program is a subroutine called by the copier sequence program as needed or at regular intervals.

First, at step 1, it is judged whether the main body of the copying machine and the main motor (not shown) for driving the film are ON. When it is OFF, the process returns to step 1. When it is ON, the process proceeds to step 2.

Step 2 is a subroutine for performing the initial operation of the stepping motor 63. The motor 63 is moved so that the swing lever 43 moves in the E direction, and the stepping motor 63 is caused to abut against the abutting member to step out the motor 63. Hereinafter, the step position of the motor 63 is controlled with this position as the origin.

The process moves to step 3, and the input IN2 is "H".
Judge whether or not. When it is "H", it is judged that the pressure is controlled by 1. When it is "H", it is judged that the pressure is controlled by 1 and the process proceeds to step 4.

In step 4, the swing lever 43 is moved in the D direction until the step position of the motor 63 is 40 steps. Then, the pressure flag is set and the process proceeds to step 8. When IN2 is "L" in step 3, the process proceeds to step 6.

In step 6, the step position of the motor 63 is moved to 20, the pressure flag is reset, and the process proceeds to step 8.

At step 8, it is determined whether the main motor is ON. When it is OFF, the procedure returns to step 1. At this time, all the phase excitation of the stepping motor 63 may be turned off. When it is ON in step 8, the process proceeds to step 9.

At step 9, it is judged whether the pressure flag and the direction of IN2 are the same. At the same time, the process returns to step 8 to determine whether the main motor is ON. When they are not the same in step 9, the process proceeds to step 10.

In step 10, the stepping motor 6
The initial operation of 3 is performed, the process returns to step 3, and the step position of the motor 63 is controlled according to the new pressing force.

As described above, the displacement amount of the tension roller 12 can be controlled by the pressing force of the fixing device.

That is, since the control means for varying the deviation speed in accordance with the switching of the pressing force of the pressing member is provided, it is possible to prevent wrinkles, creases and the like due to the sudden pressing of the film by the pressing force. Therefore, it is possible to always set the optimum deviating speed with respect to the pressing force, and it is possible to suppress the infinite reciprocating motion of the deviating movement of the film 11 within a substantially constant range. Therefore, it is possible to easily perform the shift control that can minimize the damage to the fixing film.

In this embodiment, there are two fixing device pressures 1, 2; however, a large number may be set depending on the conditions such as toner. In that case, the same can be done by having the signal 74 with a plurality of bits.

In this embodiment, the rocking lever 43 is moved by the stepping motor 63. However, since the motor 44 for rotating the lever 43 is a stepping motor, the stepping motor of the motor 44 is used to directly control the step position. Is also good.

The same applies when the motor 44 is a stepping motor and the step position is controlled in the case where the structure of FIG. 21 is used as the means for varying the film shift speed.

Even in the case of adopting the one shown in FIG. 22, it can be similarly realized by controlling the position of the eccentric cam by controlling the number of ON times of the solenoid 51 instead of controlling the position of the stepping motor 63. ..

Although the control circuit has been described as a microcomputer, it may be composed of other logic circuits.

In this embodiment, the control signal is output from the pressure control circuit. However, a sensor for detecting the position of the pressure roller 15 may be provided and the pressure may be detected by a microcomputer for control. Further, instead of providing the sensor on the pressure roller 15, the pressure lever 33 and the pressure switching lever 70 may be provided to detect the applied pressure.

The same applies when the pressurizing force control circuit and the shift control circuit (including the microcomputer 26) are configured in the same manner.

<Ninth Embodiment> (FIGS. 37 to 39) This embodiment is an embodiment of the invention of claim 7.

That is, the apparatus has a variable speed control means for the transport speed of the endless film 11 and a film shift speed variable control means for changing the film shift speed in accordance with the control speed of the speed variable control means.

The image forming apparatus is described above in the first embodiment.
Is the same as.

(1) Mechanism Structure (FIG. 37) In this embodiment, the mechanism shown in FIGS. 18 and 19 is adopted as the film deviation speed variable control means. Note that the mechanism shown in FIGS. 20 to 31 may be adopted.

FIG. 37 is a schematic block diagram of the variable control means for the transport speed of the film 11.

A drive gear 75 is provided at the end of the film drive roller 13. The drive gear 75 includes a first gear 75a for the first transport speed Va and a second transport speed V
It consists of the second gear 75b for b. The first drive from the body
It is transmitted from the idler 76a and the second idler 76b, respectively. These idlers 76a and 76b are drive switching arms 78 that rotate about the center of the drive transmission gear 77.
Is supported by. The figure (a) shows the transfer speed Va, and the figure (b) shows the transfer speed Vb switching state. The speed switching is such that Va <Vb.

Further, the drive switching arm 78 has an elongated hole 78.
a is provided, and the projection 80a of the speed switching lever 80 is provided.
Are fitted. The speed switching lever 80 includes a stepping motor 44, which is a drive unit for the above-described deviation control.
(Fig. 18) is attached. The speed switching lever 80 is slidable in the lateral direction by the long holes 80b and 80b. As shown in FIG. 9A, when the speed switching lever 80 is slid in the direction of arrow D, the deviation control swing lever 43 is displaced in the direction of arrow D, so that the displacement amount can be increased. In the diagram (b), since the displacement is in the direction of arrow E, the displacement amount can be reduced. That is, it is possible to increase the displacement amount when the film transport speed is low and decrease the displacement amount when the transport speed is high.

In this embodiment, the transfer speed is switched in two stages, but it is clear that it is possible to support two or more stages or no stage. Further, the setting of the difference in transport speed and the difference in displacement amount is not particularly limited, and can be set freely according to each device. (2) Control (FIGS. 38 and 39) The electric control unit of this embodiment will be described. FIG. 38 is an electrical control block diagram of this embodiment.

Reference numeral 26 is a microcomputer, which has a sensor 1 for detecting the film position at its input port IN1.
6 (FIG. 1, FIG. 2, FIG. 5) are connected. OUT1 has a stepping motor 4 for rotating the swing lever 43.
The control signal 4 is output, and the rotation direction is determined by the OUT1 excitation signal. Swing lever 4 for OUT2
A stepping motor 63, which has a mechanism for sliding 3 in the direction of D⇔E, is connected. Further, it has terminals for other input signals and other output signals of the copying machine using the fixing device, and performs the copying operation of this copying machine.

Reference numeral 81 denotes a control circuit for controlling the film speed of the present fixing device, which controls the speed of the motor 25 (FIGS. 1 and 2) to control the film speed. The motor 25 is configured to drive the film independently of the main motor of the copying machine main body.

A signal 82 is a film drive signal input from the microcomputer 29 to the control circuit 81, and drives the film as required in the copying sequence. A signal 83 is a signal indicating a film speed driving state performed by the control circuit 81.

When the signal 83 is "H", it indicates that the control circuit 81 is controlling at the film speed 1, and when it is "L",
It shows that the control is performed at the film speed 2 which is higher than the film speed 1. The control circuit 81 switches the film speed according to a condition signal such as toner (not shown).

Further, the microcomputer 26 operates the motor 44 so that the tension roller 12 is displaced in the Q direction (FIG. 18) when it is judged by the signal of the sensor 16 that the film is closer to the front side. At this time, the motor 44 is moved until it hits the end. Also, sensor 1
When it is determined by 6 that the film is closer to the back side, the motor 44 is moved so that the tension roller 12 is displaced in the P direction.

Next, the control of the stepping motor 63 of the microcomputer 26 will be described. FIG. 39 is a control flowchart of the stepping motor 63. This program is a subroutine called by the copier sequence program as needed or at regular intervals.

First, at step 1, it is judged whether or not the main body of the copying machine and the main motor (not shown) for driving the film are ON. When it is OFF, the process returns to step 1. When it is ON, the process proceeds to step 2.

Step 2 is a subroutine for performing the initial operation of the stepping motor 63. The motor 63 is moved so that the swing lever 43 moves in the E direction, the swing lever 43 is abutted against the abutting member, and the motor 63 is moved.
Step out. Hereafter, with this position as the origin, the motor 6
Control the step position of 3.

The process proceeds to step 3 and the input IN2 is "H".
Judge whether or not. When it is "H", it is judged that the temperature is controlled by the controlled temperature 1, and the process proceeds to step 4.

In step 4, the swing lever 43 is moved in the D direction until the step position of the motor 63 reaches 40 steps. Then, the temperature control flag is set and the process proceeds to step 8. When IN2 is "L" in step 3, the process proceeds to step 6. In step 6, the step position of the motor 63 is moved to 20, the temperature adjustment flag is reset, and the process proceeds to step 8.

At step 8, it is determined whether the motor 25 is ON. When it is OFF, the procedure returns to step 1. At this time, all the phase excitation of the stepping motor 63 may be turned off. When it is ON in step 8, the process proceeds to step 9.

At step 9, it is determined whether or not the speed flag and the direction of IN2 are the same. At the same time, the process returns to step 8 to determine whether the motor 25 is ON. When they are not the same in step 9, the process proceeds to step 10.

[0284] In step 10, the stepping motor 6
The initial operation of No. 3 is performed, the process returns to Step 3, and the step position of the motor 63 is controlled according to the new temperature adjustment.

As described above, the displacement amount of the tension roller 12 can be controlled by the film speed.

That is, since there is a variable control means for changing the film shift speed in accordance with the switching of the film transport speed, even if the transport speed changes significantly, the film shift speed itself is kept substantially constant and the reciprocation control frequency is kept constant. Since it is possible to suppress the rise, it is possible to realize the stability of the deviation control. Therefore, there is an effect that the damage of the film can be suppressed to a minimum, and that the transfer speed can be changed.

In this embodiment, the film speeds are two, that is, 1 and 2, but a large number may be set depending on the conditions such as toner.
In that case, the same can be done by having the signal 83 in a plurality of pits.

In this embodiment, the rocking lever 43 is moved by the stepping motor 63 to move D⇔E. However, since the motor 44 for rotating the rocking lever 43 is a stepping motor, the step position of the motor 44 is directly controlled. May be.

The same applies when the motor 44 is a stepping motor and the step position is controlled in the configuration of FIG. Also in the configuration of FIG. 22, instead of controlling the position of the stepping motor 63, the solenoid 51 is turned on.
The same can be achieved by controlling the position of the eccentric cam by controlling the number of times N.

Although the control circuit is described as a microcomputer, it may be configured by another logic circuit.

In this embodiment, the control signal is output from the film speed control circuit. However, an encoder may be provided on the drive roller 13 and the speed of the drive roller 13 may be detected by a microcomputer for control.

The same applies to the case where the film speed is detected by providing a pattern for detecting the speed at the film end or providing an inclination at the film end instead of providing the encoder on the drive roller 13.

The same applies when the film speed control circuit and the shift control circuit (including the microcomputer 26) are configured in the same manner.

The same applies not only to a copying machine that varies only the film speed, but also to a device that varies with the speed of the copying machine main body.

[0295]

As described above, according to the present invention, there is provided a film heating type heating device using an endless film, wherein the film shift according to the detection information of the means for detecting the shift position of the film in the width direction. For those with film deviation control means that switches the direction of the film to infinitely reciprocate the film deviation movement within a predetermined deviation movement range, the frequency of film deviation control reciprocation is approximately constant regardless of the involvement of the deviation control instability factor. It is possible to suppress within the range, it is possible to suppress the film damage to the minimum without giving excessive stress to the film, it can be easily carried out without making the film deviation control means structurally complicated and large, It is possible to constantly control and convey the film in a stable manner, and improve the reliability of the apparatus.

[Brief description of drawings]

FIG. 1 is a plan view of a heating device according to a first embodiment, which is omitted in the middle thereof.

[Figure 2] Side view

FIG. 3 is a schematic configuration diagram of an example of an image forming apparatus using the heating device as a fixing device.

FIG. 4 Outline drawing of endless film

FIG. 5: Relationship between film sensor and film position

FIG. 6 is a graph showing the relationship between film position and film sensor output.

FIG. 7 is a schematic diagram of a control system.

FIG. 8 is a flowchart of a film shift movement control program.

FIG. 9 is a flowchart of a film shift movement control program.

FIG. 10 is a flowchart of a film shift movement control program.

FIG. 11 is a flowchart of a film shift movement control program.

FIG. 12 is a flowchart of a film shift movement control program.

FIG. 13 is a plan view of the heating device according to the second, fourth, or sixth embodiment, which is omitted in the middle thereof.

FIG. 14 is a flowchart of a film shift movement control program.

FIG. 15 is a side view of the heating device according to the third embodiment.

FIG. 16 is a schematic diagram of a control system.

FIG. 17 is a schematic diagram of a control system of the heating device according to the fifth embodiment.

FIG. 18 is a perspective view of a heating device according to a seventh embodiment.

19 (a) and (b) are explanatory views of the operation of the swing lever, respectively.

FIG. 20 is a schematic view of an example of film shift speed varying means (No. 2).

FIG. 21 is a schematic view of an example of film shifting speed varying means (No. 3).

22 (a) and 22 (b) are schematic diagrams and operation explanatory views of an example (part 4) of a film shift speed varying means, respectively.

FIG. 23 is a schematic view of an example of film shifting speed varying means (No. 5).

FIG. 24 is a schematic view of an example (6) of film shifting speed varying means.

FIG. 25 is a schematic view of an example of film shift speed varying means (No. 7).

FIG. 26 is a schematic view of an example of film shifting speed varying means (part 8).

FIG. 27 is a schematic view of an example (9) of film shifting speed varying means.

FIG. 28 is a film shift speed example (part 10)
Schematic of

FIG. 29 is an example of a film shifting speed varying means (Part 11)
Schematic of

FIG. 30 shows an example of a film shifting speed varying means (12)
Schematic of

FIG. 31 shows an example of a film shifting speed varying means (13)
Schematic of

FIG. 32 is a schematic diagram of a control system.

FIG. 33 is a flowchart of a film shift movement control program.

34 (a) and 34 (b) are schematic diagrams and operation explanatory views of a heating device of an eighth embodiment, respectively.

FIG. 35 is a schematic diagram of a control system

FIG. 36 is a flowchart of a film shift movement control program.

37 (a) and (b) are schematic diagrams and operation explanatory views of a heating device of a ninth embodiment.

FIG. 38 is a schematic diagram of a control system.

FIG. 39 is a flowchart of a film shift movement control program.

[Explanation of symbols]

 11 Endless Film 12 Driven Roller 13 Drive Roller 14 Heating Body 15 Pressurizing Roller 16 Film Side Position Detection Sensor

Claims (10)

[Claims] 1. An endless film and a heating body arranged on the inner surface side of the endless film, wherein a heated body is brought into close contact with the outer surface side of the endless film so that the heating body position is conveyed together with the film. In a heating device of a film heating system for applying heat of a heating body to a heated body through a film, when a direction orthogonal to a conveying direction of the endless film is a film width direction, the endless film is conveyed in a conveying process. A film position detection unit that detects the film shift position in the width direction, and switches the shift direction of the endless film in accordance with the detection information of the film position detection unit to infinitely reciprocate the film shift movement within a predetermined shift movement range. A film shift control means for moving, a variable control means for the endless film transport speed, and the speed variable control Heating device, characterized in that it comprises a control means for changing the film toward the moving range of the film shift control means in accordance with the control speed of the stage. 2. An endless film, and a heating body arranged on the inner surface side of the endless film, wherein a heated body is brought into close contact with the outer surface side of the endless film to convey and pass the heating body position together with the film. In a heating device of a film heating system for applying heat of a heating body to a heated body through a film, when a direction orthogonal to a conveying direction of the endless film is a film width direction, the endless film is conveyed in a conveying process. A film position detection unit that detects the film shift position in the width direction, and switches the shift direction of the endless film in accordance with the detection information of the film position detection unit to infinitely reciprocate the film shift movement within a predetermined shift movement range. A film deviation control means for moving the endless film, and a pressing force for adhering the material to be heated to the heating body through the endless film. A heating device comprising: a variable control means and a control means for changing a film-side moving range of the film-side control means in accordance with a control pressing force of the pressing-force changing control means. 3. An endless film, and a heating body arranged on the inner surface side of the endless film, wherein a heated body is brought into close contact with the outer surface side of the endless film to convey and pass the heating body position together with the film. In a heating device of a film heating system for applying heat of a heating body to a heated body through a film, when a direction orthogonal to a conveying direction of the endless film is a film width direction, the endless film is conveyed in a conveying process. A film position detection unit that detects the film shift position in the width direction, and switches the shift direction of the endless film in accordance with the detection information of the film position detection unit to infinitely reciprocate the film shift movement within a predetermined shift movement range. A film deviation control means to be operated, a temperature measuring means for detecting the temperature of the heating body, and First the heating of a predetermined
A heating device having temperature control means for controlling the second set temperature and control means for changing the film shift range of the film shift control means according to the set temperature of the temperature control means .. 4. An endless film, and a heating body arranged on the inner surface side of the endless film, wherein a heated body is brought into close contact with the outer surface side of the endless film to convey and pass the heating body position together with the film. In a heating device of a film heating system for applying heat of a heating body to a heated body through a film, when a direction orthogonal to a conveying direction of the endless film is a film width direction, the endless film is conveyed in a conveying process. A film position detection unit that detects the film shift position in the width direction, and switches the shift direction of the endless film in accordance with the detection information of the film position detection unit to infinitely reciprocate the film shift movement within a predetermined shift movement range. A film deviation control means for moving the film, a heat generation amount control means for changing the heat generation amount of the heating body, and a heat generation amount control means for controlling the heat generation amount. Heating apparatus characterized by having a film closer variable speed control means for varying the deviation rate of the film Te. 5. The heating according to claim 4, further comprising a heating value control means for varying the heating value of the heating element and controlling the heating element to a predetermined first, second ... apparatus. 6. An endless film and a heating body arranged on the inner surface side of the endless film, wherein a heated body is brought into close contact with the outer surface side of the endless film to convey and pass the heating body position together with the film. In a heating device of a film heating system for applying heat of a heating body to a heated body through a film, when a direction orthogonal to a conveying direction of the endless film is a film width direction, the endless film is conveyed in a conveying process. A film position detection unit that detects the film shift position in the width direction, and switches the shift direction of the endless film in accordance with the detection information of the film position detection unit to infinitely reciprocate the film shift movement within a predetermined shift movement range. A film deviation control means for moving the endless film, and a pressing force for adhering the material to be heated to the heating body through the endless film. A heating apparatus comprising: a variable control means, and a film deviation speed variable control means for changing a film deviation speed according to the control pressing force. 7. An endless film and a heating body arranged on the inner surface side of the endless film, wherein a heated body is brought into close contact with the outer surface side of the endless film to convey and pass the heating body position together with the film. In a heating device of a film heating system for applying heat of a heating body to a heated body through a film, when a direction orthogonal to a conveying direction of the endless film is a film width direction, the endless film is conveyed in a conveying process. A film position detection unit that detects the film shift position in the width direction, and switches the shift direction of the endless film in accordance with the detection information of the film position detection unit to infinitely reciprocate the film shift movement within a predetermined shift movement range. A film shift control means for moving, a variable control means for the endless film transport speed, and the speed variable control Heating apparatus characterized by having a film closer variable speed control means for varying the deviation speed of the film in accordance with the control speed of the stage. 8. The film shift speed variable control means changes the shift speed of the film by changing the position of the film transport means.
The heating device according to any one of 1. 9. The heating device according to claim 4, wherein the film deviation speed control means changes the film deviation speed by changing the tension applied to the film. 10. The film shift speed variable control means changes the shift speed of the film by changing the position of a film contact member other than the film transport means. The heating device according to.