JPH1135221A - Heating device and its control method as well as book binding device and its energization control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To feed the optimum quantity of heat depending on conditions in regard to a heating device and is control method and a book binding device and its energization control method, in which energization timing for a plurality of heating means heating members to be heated, is controlled by the heating device and its control method. SOLUTION: The control of a CPU 426 allows both side heaters 36 and 37 out of a plurality of heaters 35 through 37 heating book binding material, to be energized, when temperature detected by temperature detectors 401 through 403 is found to have not been lowered as specified as compared with temperature measured before heating the hook binding material was started. When temperature is lowered down as specified, the heaters 35 through 37 are kept under control in such a way as to be heated. Besides, when temperature detected by the temperature detectors 401 through 403 after heating the book binding material has been over, is found to have not been lowered as specified as compared with temperature measured before heating was started, both the side heaters 36 and 37 are thereby energized, and when temperature is found to have been lowered as specified, the heaters 35 through 37 are kept under control in such a way as to be energized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating device, a method for controlling the power supply thereof, and a bookbinding device and a method for controlling the power supply thereof. The present invention relates to an energization control method, a bookbinding device, and an energization control method.

[0002]

2. Description of the Related Art Staples are often used to bind a copy made by a copier or a printed matter by a printer into a simple bookbinding material. However, the number of important documents or a bundle of paper is small. In many cases, a bookbinding tape with a hot-melt adhesive is heated and adhered to the back of the paper bundle by a heater.

In a bookbinding apparatus connected online to an image forming apparatus such as a copying machine or a printer, an alignment tray for sequentially stacking and aligning image-formed sheets discharged from an image forming apparatus upstream in the transport direction and storing the sheets. A clamp arm for clamping the aligned sheet bundle, and a binder unit for binding the sheet bundle by pressing the hot melt adhesive on the bookbinding tape while heating it with a heater.

[0004] Conventionally, a heater used as a heating means has a heat-generating resistance by a heating wire such as a nichrome wire inside a metal heat conductor such as aluminum having good heat conductivity or stainless steel having good heat storage property. The body was housed via an insulator.

However, the heater having the above-described structure has a large heat capacity as a whole, and the heater in a state near room temperature is heated from the time when the heating wire is started to be supplied to the temperature at which bookbinding can be performed. Required a considerable amount of waiting time.

Further, in a bookbinding apparatus connected online to a copying machine, a printer, or the like, in order to enable the bookbinding process at any time, even when the apparatus is not used, the heater is constantly energized by heating the heating wire at a predetermined temperature. There is a need to stand by, which is disadvantageous in terms of power saving.

In order to solve these problems, it has been proposed to use a ceramic heater as a heating means instead of the heater having the above-described structure. this is,
The ceramic heater uses a thin ceramic plate of alumina or the like as a heater substrate, and the surface of the substrate is, for example, Ag / Pd.
(Electric resistor paste) such as (silver palladium) or RuO ₂ , TA ₂ N, etc., is printed and baked to form an energizing heating resistor, which is energized to generate heat. is there.

Such a ceramic heater has a small heat capacity as a whole and has an excellent thermal conductivity unique to ceramics, so that the temperature of the entire ceramic substrate including the energized heating resistor can be increased in a very short time with energization. Therefore, if a ceramics heater is used as the heating means, the wait time from when power is supplied to the heater at a temperature near room temperature to when the temperature rises to a temperature at which bookbinding can be performed becomes extremely short. Further, it is not necessary to constantly heat the heater to a constant temperature to perform standby, and power saving can be realized when the apparatus is not used.

[0009]

However, in a bookbinding apparatus connected online to an image forming apparatus such as a copying machine or a printer as described above, the hot melt adhesive on the bookbinding tape is pressed while being heated by a heater. The time to be kept, that is, the contact time of the heater with the book material, is determined by the number of sheets included in the book material, and the contact time can be optimally controlled according to the temperature, specific heat, etc. of the book material. Absent. Therefore, bookbinding failure due to insufficient heating may occur.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problem, and energization is performed so as not to cause a bookbinding failure without changing a heater contact time uniquely determined by the number of sheets. An object of the present invention is to provide a bookbinding apparatus and a power supply control method thereof.

It is another object of the present invention to provide a heating apparatus for energizing so as not to cause a heating failure according to the condition of a material to be heated, and a method for controlling the energization.

[0012]

In order to achieve the above object, in the apparatus according to the present invention, a plurality of heating means for heating a material to be heated and at least one of the plurality of heating means are provided. A heating apparatus comprising: a temperature detection unit that detects a temperature; and a temperature control unit that controls an energization timing to the plurality of heating units based on the detected temperature to control the material to be heated to a predetermined temperature. When the temperature detected by the temperature detection unit at the start of heating the material to be heated does not decrease by a predetermined temperature from before the start of heating, the temperature control unit energizes a part of the plurality of heating units. It is characterized in that when the temperature is lowered, control is performed such that power is supplied to more heating means than a part of the plurality of heating means.

Here, in the apparatus according to the present invention, the temperature detected by the temperature detecting means after the heating of the material to be heated by the temperature control means does not decrease by a predetermined temperature as compared with before the start of the heating. At this time, it is also possible to control so as to energize a part of the plurality of heating means and to energize more heating means than part of the plurality of heating means when the temperature decreases. Here, in the apparatus according to the third aspect of the present invention, the plurality of heating units include a first heater that heats a substantially central portion of the material to be heated and a plurality of second heaters that heat other portions. The temperature control means supplies electricity to the first heater and the plurality of second heaters at a predetermined timing when the temperature decreases, and the plurality of second heaters when the temperature does not decrease. The heater can be controlled in a time-sharing manner.

Here, in the apparatus according to the present invention, the predetermined timing is such that the plurality of second heaters are energized in a time-sharing manner, and the first heater is supplied to the plurality of second heaters.
It is also possible to set the timing for energizing independently of the heater.

In order to achieve the above object, according to the method of the present invention, a plurality of heating means for heating a material to be heated and a temperature detecting means for detecting at least one temperature of the plurality of heating means are provided. Means, a power supply control method for a heating apparatus, comprising: a temperature control means for controlling the power supply timing to the plurality of heating means based on the detected temperature to control the material to be heated to a predetermined temperature. When the temperature detected by the temperature detecting means at the start of heating the material to be heated does not lower by a predetermined temperature than before the start of the heating, power is supplied to a part of the plurality of heating means. It is characterized in that more heating means are energized than a part of the heating means.

Here, in the method according to the present invention, when the temperature detected by the temperature detecting means after the heating of the material to be heated is not lower by a predetermined temperature than before the start of the heating, the plurality of heating methods are performed. It is also possible to energize a part of the means and to energize more heating means than a part of the plurality of heating means when the temperature decreases.

Here, in the method of the present invention as set forth in claim 7, a substantially central portion of the material to be heated is heated by a first heater of the plurality of heating means, and a plurality of the plurality of heating means are heated. The other portion is heated by the second heater, and when the temperature decreases, the first heater and the plurality of second heaters are energized at a predetermined timing. When the temperature does not decrease, the plurality of second heaters are heated. The second heater can be energized in a time-sharing manner.

Here, in the method according to the present invention, the predetermined timing is such that the plurality of second heaters are energized in a time-sharing manner, and the first heater is supplied to the plurality of second heaters.
It is also possible to set the timing for energizing independently of the heater.

In order to achieve the above object, in the apparatus according to the present invention, a plurality of heating means for heating the bookbinding material and a temperature detecting means for detecting at least one temperature of the plurality of heating means are provided. And temperature control means for controlling the timing of energization to the plurality of heating means based on the detected temperature to control the bookbinding material to a predetermined temperature, and contacting the plurality of heating means with the bookbinding material. A bookbinding apparatus that performs bookbinding by, when the temperature detected by the temperature detection unit at the time of starting heating of the bookbinding material does not decrease by a predetermined temperature from before the start of heating by the temperature control unit. It is characterized in that a part of the plurality of heating means is energized when a part of the plurality of heating means is energized and the temperature is reduced.

Here, in the apparatus according to the present invention, when the temperature detected by the temperature detecting means after the end of heating of the bookbinding material by the temperature control means does not decrease by a predetermined temperature compared to before the start of heating. It is also possible to control so that a part of the plurality of heating means is energized, and when the temperature is reduced, more heating means are energized than a part of the plurality of heating means.

In the apparatus according to the present invention, the plurality of heating means may include a first heater for heating a substantially central portion of the bookbinding material and a plurality of second heaters for heating other portions.
The temperature control means, when the temperature is reduced, the first heater and the plurality of second heaters are energized at a predetermined timing, and when the temperature is not reduced, the plurality of heaters are supplied. The second heater can be energized in a time-sharing manner.

Here, in the apparatus according to the present invention, the predetermined timing is such that the plurality of second heaters are energized in a time-sharing manner, and the first heater is supplied to the plurality of second heaters. The timing of energizing independently of the heater may be set.

Here, in the apparatus according to the present invention, the plurality of heating means may include a ceramic heater.

In order to achieve the above object, in the method according to the present invention, a plurality of heating means for heating the bookbinding material and a temperature detecting means for detecting at least one temperature of the plurality of heating means are provided. And temperature control means for controlling the timing of energization to the plurality of heating means based on the detected temperature to control the bookbinding material to a predetermined temperature, and contacting the plurality of heating means with the bookbinding material. A method of controlling the power supply of a bookbinding apparatus that performs bookbinding by causing a part of the plurality of heating means when the temperature detected by the temperature detection means at the start of heating of the bookbinding material does not decrease by a predetermined temperature before the start of heating. And when the temperature decreases, more than one of the plurality of heating means is energized.

Here, in the method according to the present invention, when the temperature detected by the temperature detecting means does not decrease by a predetermined temperature after the heating of the bookbinding material before starting the heating, the plurality of heating means are used. May be energized, and when the temperature falls, more energizing means may be energized than a part of the plurality of heating means.

Here, in the method of the present invention according to claim 16, a substantially central portion of the material to be heated is heated by a first heater among the plurality of heating means, and a plurality of heating means are provided. The other portion is heated by the second heater, and when the temperature decreases, the first heater and the plurality of second heaters are energized at a predetermined timing. When the temperature does not decrease, the plurality of second heaters are heated. The second heater can be energized in a time-sharing manner.

Here, in the method according to the present invention, the predetermined timing is such that the plurality of second heaters are energized in a time-sharing manner, and the first heater is supplied to the plurality of second heaters. The timing of energizing independently of the heater may be set.

[0028]

Embodiments of the present invention will be described below in detail with reference to the drawings.

(First Embodiment) FIG. 1 is a sectional view showing a configuration of an online bookbinding apparatus according to a first embodiment of the present invention.

As shown in FIG. 1, the bookbinding apparatus 1 of the present embodiment is connected to a copying machine 11 online. The bookbinding apparatus 1 includes an alignment tray 2 for stacking and aligning sheets (recording media) discharged from a fixing device 12 of a copying machine 11. Then, the aligned sheet bundle 15 is clamped by being clamped by a pair of clamp arms 3. The binder unit 9 presses a bookbinding tape with a hot melt adhesive on the back of the sheet bundle 15 while heating it with a plurality of ceramic heaters.
Bind.

The sheet discharged from the fixing device 12 of the copying machine 11 is conveyed to a matching tray 2 in the bookbinding device 1 by a well-known conveying mechanism. When the number of sheets to be bound is stacked and aligned on the alignment tray 2, the sheet bundle 15
Is clamped by a clamp arm 3 whose clamping pressure is preset by a torque limiter.

The sheet bundle 15 clamped by the clamp arm 3 is moved while being clamped to the binder unit 9 by a well-known drive mechanism. In the binder unit 9, a plurality of heaters hot-melt the bookbinding tape while pressing the back and side surfaces of the sheet bundle 15 reaching a predetermined position at a constant pressure so that the bookbinding tape is pressed in a U-shape. The bookbinding tape and the sheet bundle 15 are bonded by heating and melting the adhesive at a constant temperature according to the properties of the adhesive.

FIG. 2 is a sectional view of the bookbinding tape used in the present embodiment.

The bookbinding tape 20 has a three-layer structure as shown in FIG. The base layer 22 is a paper cloth, and the A layer 26 and the B layer 24 are EVA-based hot melt adhesives.
The thickness of each layer is, for example, about 0.4 mm for the A layer 26 and about 2 mm for the B layer 2.
4 is about 0.05 mm, and the base layer 22 is about 0.15 mm. The softening point of each of the A layer 26 and the B layer 24 is required to be as fast as possible during the bookbinding operation and not to be melted in the bookbinding tape storage environment.

Next, the bookbinding operation in the binder unit 9 will be described with reference to FIG.

When the bookbinding tape 20 is inserted into the tape guides 30a and 30b by a well-known transport mechanism and a portion corresponding to a substantially center of the bookbinding material starts to be heated by the center heater 35, the bookbinding tape 20 is clamped by the clamp arm 3 (see FIG. 1). The sheet bundle 15 is moved to a position shown in FIG. 3A by a well-known driving mechanism while being clamped.

After a lapse of a predetermined time, for example, 4 seconds, FIG.
As shown in (B), the tape binding margin is bent by the upper and lower side heaters 36 and 37. Then, as shown in FIG. 3C, the upper and lower side heaters 36 and 37 perform a sandwiching operation, so that the tape binding margin is adhered to the sheet bundle 15.

In the bookbinding operation described above, when the tape binding margin is bent by the upper and lower side heaters 36 and 37,
It is necessary that the A layer 26 (see FIG. 2) is already softened and easily bent. Therefore, the temperature of the center heater 35 is set to a temperature much higher than the softening point of the A layer 26, for example, 180, in order to quickly melt the A layer portion within a predetermined time.
It is set to ° C. The upper and lower side heaters 36, 3
7, since the binding margin of the bookbinding tape 20, which has already been heated to some extent by the center heater 35, is bonded to the sheet bundle 15, each heat generation amount may be considerably smaller than that of the center heater 35. Therefore, the upper and lower side heaters 3
The set temperatures of 6, 37 were 120 ° C.

FIG. 4 is a block diagram showing a circuit of a heater temperature control system according to this embodiment.

In FIG. 4, 35 is a center heater, 36
Denotes an upper side heater, and 37 denotes a lower side heater. Each heater consumes 500 W of electric power with respect to the voltage of the commercial power supply of AC 100 V. Reference numerals 401, 402, and 403 denote temperature detectors for detecting the temperatures of the center heater, the upper side heater, and the lower side heater, respectively. The temperature detection signals from these temperature detectors are A / D converters 41, respectively.
The signals are converted from analog signals to digital signals by 1, 412, 413 and output to the CPU circuit unit 425.

The CPU circuit unit 425 includes a central processing unit (hereinafter abbreviated as CPU) 426 for performing calculations by a predetermined program and controlling the entire processing unit, and a ROM and a signal processing unit for storing programs and predetermined data. A storage unit 427 including a RAM or an IC card or a floppy disk for temporarily storing data according to the program, and a program and data, and an I / O control unit 430 for transmitting and controlling input / output signals. Be composed. Also. The CPU 426 is provided with a timer for counting time, and the CPU 426 or the I / O control unit 430 is provided with a plurality of registers, which are used for temporarily storing and reading data signals.

Reference numerals 408, 409, and 410 denote SSR1, SSR2, and SSR3 for switching the energization of the center heater, the upper side heater, and the lower side heater, respectively.
These are controlled by control signals from the CPU circuit unit 425, respectively.

Next, a method of controlling the heater energization in the heater temperature control system will be described.

As described above, each of the heaters 35 to
The power consumed by 37 is 500W. However,
In any case, it is impossible to energize all three heaters at the same time in any case for the purpose of suppressing the total power consumption of the entire bookbinding apparatus including the motor and the like to 1500 W or less. At the time of waiting until the heater is heated up (increased in temperature) to the respective set temperature when the power is turned on, if the power consumption of the other parts than the heater is less than 500 W, 2
It is possible to energize the heaters 3 simultaneously.

FIG. 5 is a timing chart showing an example of the energizing sequence.

As shown in FIG. 5, the center heater 35 having the highest set temperature of 180 ° C. is always energized by the SSR1 operation signal from the start of energization of the heater until the temperature reaches the set temperature. On the other hand, the upper and lower side heaters 36 and 37 whose set temperature is 120 ° C. are energized in a time-sharing manner by the SSR2 and SSR3 operation signals at different timings. These two
The heaters 36 and 37 are energized alternately every 200 msec, and energization control is performed so that both are not energized simultaneously. In the experiment according to the present embodiment, when the sequence shown in FIG. 5 was used, the time required for each heater to reach each set temperature was almost the same.

When all the heaters reach the set temperature, the binder unit 9 is ready for bookbinding.
In consideration of the fact that the power consumption other than the heaters of the drive system and the like during the bookbinding operation becomes large, the center heater 35 and the upper and lower side heaters 36 and 37 are used when not necessary, in order to minimize the instantaneous power consumption at the time of bookbinding. Is time-divisionally controlled, and as shown below, two or more heaters are not energized at the same time, that is, the sequence shifts to a sequence shown in FIG.

The CPU 426 inputs the temperature of the center heater 35 detected by the temperature detector 401 via the A / D converter 411 and the I / O control unit 430. CP
U426 is the temperature of the center heater 35 and the set temperature (18
(0 ° C.), and if the temperature is lower than the set temperature, an operation ON signal is output to the SSR1 408 to energize the center heater 35 (the SSR1 operation signal in FIG. 6 is set high). After a lapse of 200 ms from the output of the operation ON signal, the CPU 426 outputs an operation OFF signal to the SSR1 408 to stop energizing the center heater 35 (turns the SSR1 operation signal of FIG. 6 low). If the temperature of the center heater 35 is higher than the set temperature, power is not supplied and the apparatus waits for 200 ms.

Next, the CPU 426 compares the temperature of the upper side heater 36 detected by the temperature detector 402 with the A / D
The data is input via the converter 412 and the I / O control unit 430.
The CPU 426 compares the temperature of the upper side heater 36 with the set temperature (120 ° C.). If the temperature is lower than the set temperature, the SSR 24 is used to energize the upper side heater 36.
The operation ON signal is output to the CPU 09 (the SSR2 operation signal in FIG. 6 is set high). 100 after output of operation ON signal
After a lapse of ms, the CPU 426 outputs an operation-off signal to the SSR2 409 to stop energization of the upper side heater 36 (sets the SSR2 operation signal in FIG. 6 to low). If the temperature of the upper side heater 36 is higher than the set temperature, the power is not supplied and the process waits for 100 ms.

Next, the CPU 426 sets the temperature of the lower side heater 37 detected by the temperature detector 403 to A / D
CPU 42 via converter 413 and I / O control unit 430
Enter 6 The CPU 426 compares the temperature of the lower side heater 37 with the set temperature (120 ° C.), and outputs an operation ON signal to the SSR3 410 to energize the lower side heater 37 if the temperature is lower than the set temperature (FIG. 6). S
Set the SR3 operation signal to high). After a lapse of 100 ms from the output of the operation ON signal, the CPU 426 outputs an operation OFF signal to the SSR3 410 to stop energizing the lower side heater 37 (turns the SSR3 operation signal of FIG. 6 low). If the temperature of the lower side heater 37 is higher than the set temperature, the power is not supplied and the process waits for 100 ms.

Then, returning to the beginning, the above processing is repeated.

Incidentally, the sheet bundle 1 is supplied to the heater during the bookbinding operation.
When the sheet bundle 5 and the bookbinding tape 20 contact each other, heat is taken by the sheet bundle 15 and the bookbinding tape 20, so that the heater temperature temporarily drops below the set temperature.

The amount of temperature decrease depends on conditions such as the heat capacity (determined by the thickness and specific heat) of the sheet bundle 15 and the bookbinding tape 20 and the temperature, but when the amount of heat taken away is large, the amount of temperature decrease is large. Therefore, the center heater 35
If the power is supplied to both the side heaters 36 and 37 in a time-sharing manner as described above, the amount of heat required for bookbinding may not be supplied. In addition, during the continuous bookbinding operation of a large amount of heat to be taken, the heater temperature may not have recovered to the set temperature at the time when each bookbinding operation starts.

FIG. 7 shows the center heater 3 during the continuous bookbinding operation.
5 is a graph showing a typical example of the temperature transition of FIG.

When the center heater 35 starts abutting on the sheet bundle 15 and the bookbinding tape 20 (hereinafter referred to as bookbinding material) and starts heating, the bookbinding material deprives the heat and the temperature of the center heater 35 once becomes minimum. After decreasing to the value, it gradually increases. When the bookbinding operation is completed and the bookbinding material is separated from the heater, the heater temperature returns to the set temperature of 180 ° C. In the experiment using the system according to the present embodiment, the temperature of the center heater 35 shows the minimum value on average about 0.5 seconds after the start of contact. The temperature transition of the side heaters 36 and 37 also shows a tendency similar to that of the center heater 35, but the set temperature and the amount of temperature decrease are low, and the contact time is shorter than that of the center heater 3.
5, the description is omitted here, and a sequence of energizing the heater based on the temperature of the center heater 35 will be described below with reference to FIG.

In FIG. 8, when the temperature T1 of the center heater 35 detected by the temperature detector 401 is 160 ° C. or less when 0.5 seconds have elapsed from the start of the contact, the power supply to the center heater 35 is controlled by the SSR1. The two side heaters 36 and 37 are controlled independently of each other by an operation signal in a time division manner by an SSR2 operation signal and an SSR3 operation signal.

Here, the temperature detector 401 every 200 ms
The temperature of the center heater 35 detected by the
CPU 4 via a D converter 411 and an I / O control unit 430
The CPU 426 compares the temperature of the center heater 35 with the set temperature (180 ° C.). If the temperature is lower than the set temperature, the CPU 426 sets the SSR1 operation signal to high for 200 ms to energize the center heater 35, If it is higher, the power is not supplied while it is kept low, and the operation waits for 200 ms. Also, the same timing as the center heater temperature detection,
That is, the temperature of the upper side heater 36 detected by the temperature detector 402 every 200 ms is used as the A / D converter 412.
Is input to the CPU 426 via the I / O control unit 430. The CPU 426 compares the temperature of the upper side heater 36 with the set temperature (120 ° C.). If the temperature is lower than the set temperature, the SSR2 operation signal is set high for 100 ms to energize the upper side heater 36, and if the temperature is higher than the set temperature. While the power is kept low, the power is not supplied, and the apparatus waits for 100 ms.

Next, 100 minutes from the detection of the center heater temperature.
After a lapse of ms, the temperature of the lower side heater 37 detected by the temperature detector 403 is input to the CPU 426 via the A / D converter 413 and the I / O control unit 430. CPU 426
Compares the temperature of the lower side heater 37 with the set temperature (120 ° C.), and if the temperature is lower than the set temperature, sets the SSR3 operation signal to high for 100 ms to energize the lower side heater 37; No power is supplied, and the process waits for 100 ms. The above processing is repeated every 200 ms.

As described above, the two side heaters 36 and 37 are not energized simultaneously, but one of them may be energized simultaneously with the center heater 35.

If the center heater temperature T1 after 0.5 seconds from the start of contact is higher than 160 ° C., the energization to the center heater 35 and all the heaters of both side heaters 36 and 37 is controlled in a time-division manner. Is done. That is, 2
The power supply sequence is controlled as shown in FIG.

The temperature T when the bookbinding operation is completed
When 2 is 165 ° C. or lower, the energization control of the center heater 35 is performed independently of the side heaters 36 and 37. That is, the energization control is performed as shown in FIG. 8, and the two side heaters 36 and 37 are controlled in a time-division manner. When the temperature of the center heater 35 reaches the set temperature, energization to the center heater 35 and both side heaters 36 and 37 is controlled in a time division manner as shown in FIG.

As described above, according to the present embodiment, the energization control method for switching the energization timing to each heater of the bookbinding apparatus according to the conditions is employed, so that the processing speed of the entire system is not reduced. In this case, an optimum amount of heat can be supplied so as not to cause a bookbinding defect, and the effect that instantaneous power consumption can be suppressed to a necessary minimum can be obtained.

(Second Embodiment) In the above-described first embodiment, the temperature T1 when a predetermined time (0.5 seconds) elapses from the start of contact with the center heater 35 or the bookbinding operation. Although the switching control of the energization timing to each heater is performed based on the temperature T2 at the time of termination, the energization timing may be switched and controlled based on the minimum temperature of the center heater 35 detected as described below.

That is, the temperature of the center heater 35 is set to 2
The minimum value of the temperature during the bookbinding operation is detected while sampling every 00 ms. If the detected minimum value is 160 ° C. or lower, the energization control of the center heater 35 is performed independently of the two side heaters 36 and 37, and both side heaters 36 and 37 are controlled in a time-division manner. Center heater 35
When the temperature rises and reaches the set temperature, the power supply to all of the center heater 35 and both side heaters 36 and 37 is controlled in a time-division manner.

If the detected minimum value of the temperature of the center heater 35 is higher than 160 ° C.,
5 and the energization to both side heaters 36 and 37 are time-divisionally controlled.

According to this embodiment, the same effects as those of the first embodiment can be obtained. In addition. The set temperature is not limited to the above value.

In each of the above embodiments, an example of controlling the power supply to the heater when the bookbinding apparatus heats the bookbinding material has been described. However, the present invention is applicable to another heating apparatus that controls the temperature by heating the material to be heated by a plurality of heating means. The present invention can also be applied to the present invention.

The method of the present invention may be applied to a system composed of a plurality of devices or an apparatus composed of one device. Needless to say, the method of the present invention can also be applied to a case where the method is achieved by supplying a program to a system or an apparatus. In this case, by reading out a storage medium storing a program represented by software for achieving the method of the present invention into a system or an apparatus, the system or apparatus can receive the effects of the method of the present invention. Become.

[0069]

As described above, according to the present invention, when the temperature detected by the temperature detecting means at the start of heating of the material to be heated is not lower than the predetermined temperature before the start of heating, a plurality of heating materials for heating the material to be heated are provided. A part of the means is energized, and if the temperature is lowered, the heating means is controlled so as to energize more heating means. When the temperature does not decrease by more than a predetermined value, a part of the plurality of heating means is energized, and when the temperature is decreased, the heating means is controlled so as to energize more heating means. Without this, it is possible to supply an optimum amount of heat to the material to be heated so as not to cause a heating failure, and it is possible to obtain an effect that instantaneous power consumption can be suppressed to a minimum.

According to the present invention, when the temperature detected by the temperature detecting means at the time of starting the heating of the bookbinding material does not decrease by a predetermined temperature compared to before the start of the heating, electricity is supplied to a part of the plurality of heating means for heating the bookbinding material. When there is a decrease in the temperature, control is performed so as to energize more heating means, and when the temperature detected by the temperature detection means after the end of heating of the bookbinding material does not decrease by a predetermined temperature than before the start of heating. Electricity is supplied to a part of the plurality of heating means, and when the temperature is reduced, control is performed so as to supply more electric power to the heating means, so that bookbinding defects do not occur without reducing the overall processing speed. Thus, it is possible to supply an optimal amount of heat to the bookbinding material, and it is possible to obtain an effect that instantaneous power consumption can be minimized.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a structure of a bookbinding apparatus according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view illustrating a structure of a bookbinding tape made of a two-layer hot melt adhesive.

FIG. 3 is a diagram illustrating an outline of a bookbinding operation in a binder unit.

FIG. 4 is a block diagram illustrating a circuit of a heater temperature control system according to the first embodiment.

FIG. 5 is a timing chart showing an example of an energizing sequence when a heater is heated up.

FIG. 6 is a timing chart showing another example of an energizing sequence when the heater is heated up.

FIG. 7 is a graph showing a typical example of a temperature transition of a center heater during a continuous bookbinding operation.

FIG. 8 shows a center heater 35 when the heater is heated up.
6 is a timing chart showing an energization sequence to the heater based on the temperature of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bookbinding apparatus 2 Alignment tray 3 Clamp arm 9 Binder unit 11 Copy machine 12 Fixing device 15 Sheet bundle 30 Tape guide 20 Bookbinding tape 401, 402, 403 Temperature detector 35 Center heater 36 Upper side heater 37 Lower side heater 408, 409, 410 SSR 411 A / D converter 425 CPU circuit unit 426 CPU 427 Storage unit 430 I / O control unit

Claims (17)

[Claims] A plurality of heating means for heating a material to be heated;
Temperature detecting means for detecting at least one temperature of the plurality of heating means, and temperature control for controlling the timing of energizing the plurality of heating means based on the detected temperature to control the material to be heated to a predetermined temperature. Means for heating the material to be heated, when the temperature detected by the temperature detecting means at the start of heating of the material to be heated does not decrease by a predetermined temperature from before the start of heating. A heating device, wherein a part of the heating means is energized, and when the temperature is lowered, the heating means is controlled so as to energize more heating means than a part of the plurality of heating means. 2. When the temperature detected by the temperature detecting means does not decrease by a predetermined temperature after the heating of the material to be heated by the temperature control means before the start of heating, a part of the plurality of heating means is energized. 2. The heating apparatus according to claim 1, wherein when the temperature decreases, control is performed such that power is supplied to more heating means than a part of the plurality of heating means. 3. The plurality of heating means includes a first heater for heating a substantially central portion of the material to be heated and a plurality of second heaters for heating other portions. When the temperature decreases, the first heater and the plurality of second heaters are energized at a predetermined timing, and when the temperature does not decrease, the plurality of second heaters are energized in a time-sharing manner. The heating device according to claim 1 or 2, wherein 4. The method according to claim 1, wherein the predetermined timing is the plurality of second timings.
4. The heating device according to claim 3, wherein the heater is energized in a time-division manner, and the first heater is energized independently of the plurality of second heaters. 5. A plurality of heating means for heating a material to be heated,
Temperature detecting means for detecting at least one temperature of the plurality of heating means, and temperature control for controlling the timing of energizing the plurality of heating means based on the detected temperature to control the material to be heated to a predetermined temperature. Means for controlling the energization of the heating device, comprising: when the temperature detected by the temperature detecting means at the start of heating the material to be heated does not decrease by a predetermined temperature before the start of the heating, the plurality of heating means A power supply control method for a heating device, comprising supplying power to a part of the plurality of heating means and supplying power to a part of the plurality of heating means when the temperature decreases. 6. When the temperature detected by the temperature detecting means after the heating of the material to be heated is not lower by a predetermined temperature than before the start of heating, power is supplied to a part of the plurality of heating means,
6. The method according to claim 5, wherein when the temperature decreases, more than one of the plurality of heating units is energized. 7. A first heater of the plurality of heating means heats a substantially central portion of the material to be heated, and a plurality of second heaters heats another portion of the plurality of heating means. When the temperature decreases, the first heater and the plurality of second heaters are energized at a predetermined timing, and when the temperature does not decrease, the plurality of second heaters are energized in a time-sharing manner. The method for controlling the energization of a heating device according to claim 5. 8. The method according to claim 1, wherein the predetermined timing is determined based on the plurality of second
8. The energization control of the heating device according to claim 7, wherein the heater is energized in a time-division manner, and the first heater is energized independently of the plurality of second heaters. Method. 9. A plurality of heating means for heating the bookbinding material, a temperature detection means for detecting at least one temperature of the plurality of heating means, and an energization timing for the plurality of heating means based on the detected temperature. Temperature control means for controlling the bookbinding material to a predetermined temperature to control the bookbinding material, the bookbinding apparatus to make the plurality of heating means abut against the bookbinding material, the bookbinding device, wherein the temperature control means, the bookbinding When the temperature detected by the temperature detecting means at the time of starting the heating of the material does not lower by a predetermined temperature than before the start of the heating, electricity is supplied to a part of the plurality of heating means, and when the temperature decreases, the plurality of heating means A bookbinding apparatus characterized in that it controls so as to energize more than a part of the heating means. 10. When the temperature detected by the temperature detector after the heating of the bookbinding material does not decrease by a predetermined temperature from before the start of heating by the temperature controller, a part of the plurality of heaters is energized. 10. The bookbinding apparatus according to claim 9, wherein when the temperature is lowered, control is performed such that power is supplied to more heating units than a part of the plurality of heating units. 11. The plurality of heating units include a first heater that heats a substantially central portion of the bookbinding material and a plurality of second heaters that heat other portions. When the temperature decreases, the first heater and the plurality of second heaters are energized at a predetermined timing, and when the temperature does not decrease, the plurality of second heaters are energized in a time-sharing manner. The bookbinding apparatus according to claim 9 or 10, wherein: 12. The predetermined timing is a timing at which the plurality of second heaters are energized in a time-division manner and the first heater is energized independently of the plurality of second heaters. The bookbinding device according to claim 11, wherein: 13. The bookbinding apparatus according to claim 9, wherein said plurality of heating means include a ceramic heater. 14. A plurality of heating means for heating the bookbinding material,
Temperature detecting means for detecting at least one temperature of the plurality of heating means, and temperature control means for controlling the timing of energizing the plurality of heating means based on the detected temperature to control the bookbinding material to a predetermined temperature. A method of controlling the power supply of a bookbinding apparatus that performs bookbinding by bringing the plurality of heating means into contact with the bookbinding material, wherein the temperature detected by the temperature detection means at the start of heating the bookbinding material is before the heating is started. When the temperature does not decrease by more than a predetermined value, electricity is supplied to a part of the plurality of heating means, and when the temperature is decreased, electricity is supplied to more heating means than a part of the plurality of heating means. A method for controlling the energization of the device. 15. When the temperature detected by the temperature detecting means after the end of heating of the bookbinding material is not lower by a predetermined temperature than before the start of heating, power is supplied to a part of the plurality of heating means,
15. The method according to claim 14, wherein when the temperature decreases, more than one of the plurality of heating units is energized. 16. A substantially central portion of the material to be heated is heated by a first heater of the plurality of heating means, and another portion is heated by a plurality of second heaters of the plurality of heating means. When the temperature decreases, the first heater and the plurality of second heaters are energized at a predetermined timing, and when the temperature does not decrease, the plurality of second heaters are energized in a time-sharing manner. Claim 14 or 1
6. The method for controlling power distribution of a bookbinding apparatus according to item 5. 17. The predetermined timing is a timing at which the plurality of second heaters are energized in a time-sharing manner, and the first heater is energized independently of the plurality of second heaters. The method for controlling power distribution of a bookbinding apparatus according to claim 16, wherein: