JPH05278935A - Facsimile equipment - Google Patents

Abstract

PURPOSE:To restrain the temperature rise of a motor, avoid unnecessary delay of writing speed, and prevent a white stripe in an image and prevent noise from being generated due to the uneven feed of sheets to be recorded. CONSTITUTION:This facsimile equipment 11, which is equipped with a storage box 13 for storing sheets 12 to be recorded, a carrier mechanism for carrying the sheets to be recorded, a stepping motor 18 for driving the carrier mechanism, and a control means 19 for controlling pulse rate which excites the stepping motor, is provided with a remaining amount sensor 24 which detects the remaining amount of the sheets to be recorded in the storage box, and a temperature sensor 23 which detects the temperature of the motor in the stepping motor. The control means is constituted so as to change the pulse rate which excites the stepping motor, based on a pulse rate table which sets pulse rate corresponding to the remaining amount detected by the remaining amount sensor when the motor temperature exceeds a prescribed value, and keeps changing of the pulse rate while the motor temperature is more than the prescribed value.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile apparatus, for example, an image recording apparatus and an image printing apparatus, and more particularly to a facsimile apparatus using a stepping motor as a driving source for conveying recording paper.

[0002]

2. Description of the Related Art As a conventional facsimile apparatus, for example, there is one described in JP-A-2-220561. This is to reduce the heat generation and the consumption current of the motor of the drive source by controlling the drive current when the rotation of the motor is stopped to be smaller than the drive current when the rotation is performed in the facsimile apparatus having the normal configuration.

[0003]

However, in such a conventional facsimile apparatus, since the drive current is limited to a small value only when the apparatus is stopped, the motor is not driven when the apparatus is continuously driven and the rotational drive continues for a long time. No consideration is given to the calorific value. It is also known that when the motor is energized, the internal temperature of the motor rises due to the resistance of the motor coil. In this case, the driving current value, the driving frequency, and the excitation time increase in proportion to the pulse rate. That is, as shown in FIG. 9, the temperature rise is large when the current value is large, and the temperature rise is small when the drive current is small. Further, there is a problem that the temperature rise becomes large when the pulse rate is high. In a facsimile machine, it is necessary to suppress the temperature rise of the motor to a constant value due to various factors.

The present invention has been made against the background of such a conventional technique, and a remaining amount sensor for detecting the remaining amount of recording paper, a temperature sensor for detecting the motor temperature of a stepping motor, or a motor temperature prediction. When a motor temperature predicting means is provided and the motor temperature exceeds a predetermined value,
The motor temperature rise is suppressed by changing the motor excitation current value, excitation time, and motor drive slew-up time according to changes in the remaining amount of recording paper and the control status, and unnecessary writing speed delays. SUMMARY OF THE INVENTION An object of the present invention is to provide a facsimile apparatus which can avoid the above and can prevent the generation of white streaks in an image and noise due to uneven feeding of recording paper.

[0005]

The invention according to claim 1 is
A storage box for storing the recording paper wound in a roll, a transport mechanism for transporting the recording paper to the recording unit, a stepping motor for driving the transport mechanism, and a pulse rate which is an excitation time for exciting the stepping motor. And a control device for controlling the recording medium, and a facsimile apparatus that conveys the recording paper by intermittently driving a stepping motor according to a reception state of image information at the time of reception, and detects the remaining amount of the recording paper in the storage box. In addition to providing a remaining amount sensor, a temperature sensor for detecting the motor temperature of the outer peripheral portion of the stepping motor is provided, and the control means responds to the remaining amount detected by the remaining amount sensor when the motor temperature exceeds a predetermined value. Based on the pulse rate table in which the pulse rate for It is characterized in changing the slate.

According to a second aspect of the present invention, in addition to the configuration of the first aspect, a slew-up table is provided in which a slew-up time for motor drive corresponding to the remaining amount of the recording paper and the pulse rate is set, and the control is performed. The means changes the slew-up time based on the slew-up table when the detected motor temperature exceeds a predetermined value and the pulse rate for exciting the stepping motor is changed.

According to a third aspect of the invention, a storage box for storing the recording paper wound in a roll shape, a transport mechanism for transporting the recording paper to the recording section, a stepping motor for driving the transport mechanism, A facsimile device for controlling the exciting current value for exciting the stepping motor, which conveys the recording paper by intermittently driving the stepping motor in accordance with the reception state of image information at the time of reception. A remaining amount sensor for detecting the remaining amount of the recording paper is provided, and a temperature sensor for detecting the motor temperature of the outer peripheral portion of the stepping motor is provided, and when the motor temperature exceeds a predetermined value, the control means Based on the current value table in which the exciting current value corresponding to the remaining amount detected by the sensor is set, the stepping motor is operated while the motor temperature is equal to or higher than a predetermined value. It is characterized in that to change the excitation current value to be magnetized.

According to a fourth aspect of the present invention, in addition to the structure of the third aspect, a slew-up table is provided in which a slew-up time for motor drive corresponding to the remaining amount of the recording paper and the exciting current value is set. The control means changes the slew-up time based on the slew-up table when the motor temperature exceeds a predetermined value and the exciting current value for exciting the stepping motor is changed.

According to a fifth aspect of the present invention, a storage box for storing the recording paper wound into a roll, a transport mechanism for transporting the recording paper to the recording unit, a stepping motor for driving the transport mechanism, And a control unit for controlling a pulse rate, which is an excitation time for exciting the stepping motor, wherein the stepping motor is intermittently driven according to a reception state of image information at the time of reception to convey the recording paper. The box is provided with a remaining amount sensor for detecting the remaining amount of the recording paper, and motor temperature predicting means for predicting the motor temperature from the driving state of the stepping motor is provided, and the controlling means predicts the motor temperature to a predetermined value. When the above is reached, based on the pulse rate table that sets the pulse rate corresponding to the remaining amount detected by the remaining amount sensor, the motor Degree is of between less than a predetermined value, characterized in that to change the pulse rate for exciting the stepping motor.

According to a sixth aspect of the present invention, in addition to the configuration of the fifth aspect, a slew-up table is provided in which a slew-up time of motor drive corresponding to the remaining amount of the recording paper and the pulse rate is set, and the control is performed. Means for changing the slew-up time based on the slew-up table when the predicted motor temperature exceeds a predetermined value and the pulse rate for exciting the stepping motor is changed. ..

According to a seventh aspect of the present invention, there is provided a storage box for storing the recording paper wound in a roll shape, a transport mechanism for transporting the recording paper to the recording section, a stepping motor for driving the transport mechanism, In a facsimile apparatus for transporting the recording paper by intermittently driving the stepping motor in accordance with a reception state of image information at the time of reception, a control unit for controlling an exciting current value for exciting the stepping motor is provided. A remaining amount sensor for detecting the remaining amount of the recording paper is provided, and a motor temperature predicting means for predicting the motor temperature from the driving state of the stepping motor is provided, and the controlling means makes the predicted motor temperature equal to or higher than a predetermined value. When the motor temperature is equal to or higher than a predetermined value based on the current value table that sets the exciting current value corresponding to the remaining amount detected by the remaining amount sensor, It is characterized in that to change the excitation current value for exciting the stepping motor.

According to an eighth aspect of the present invention, in addition to the configuration of the seventh aspect, a slew-up table is provided in which a slew-up time for motor drive corresponding to the remaining amount of the recording paper and the exciting current value is set. The control means changes the slew-up time based on the slew-up table when the predicted motor temperature becomes equal to or higher than a predetermined value and the exciting current value for exciting the stepping motor is changed. Is.

[0013]

According to the first aspect of the invention, a recording paper remaining amount sensor and a temperature sensor for detecting the motor temperature of the stepping motor are provided, and based on the pulse rate table set corresponding to the remaining amount of recording paper, Since the control means for changing the pulse rate for exciting the stepping motor is provided, when the motor temperature exceeds a predetermined value by setting the pulse rate in the pulse rate table so as to suppress the heat generation of the motor. The control means drives the motor at a pulse rate according to the remaining amount of recording paper, and suppresses heat generation of the motor.

According to a second aspect of the present invention, in addition to the configuration of the first aspect, a slew-up table is provided to set a slew-up time of motor drive corresponding to the remaining amount of recording paper and the pulse rate, and controls these. When the motor temperature exceeds a predetermined value, the control means responds to the change of the pulse rate and controls the slew-up time based on the slew-up table.

According to the third aspect of the present invention, a remaining amount sensor for the recording paper and a temperature sensor for detecting the motor temperature of the stepping motor are provided, and based on the current value table set corresponding to the remaining amount of the recording paper, Since the control means for changing the exciting current value for exciting the stepping motor is provided, by setting the exciting current value in the current value table so as to suppress the heat generation of the motor, the motor temperature becomes the predetermined value or more. At this time, the control means drives the exciting current value motor according to the remaining amount of the recording paper, and heat generation of the motor is suppressed.

According to a fourth aspect of the present invention, in addition to the configuration of the third aspect, a slew-up table is provided in which a slew-up time of motor drive corresponding to the remaining amount of recording paper and the exciting current value is set. Since the control means for controlling is provided, when the motor temperature becomes equal to or higher than the predetermined value, the control means controls to change the slew-up time based on the slew-up table corresponding to the change of the exciting current value.

According to the fifth aspect of the present invention, a recording paper remaining amount sensor and a motor temperature predicting means for predicting the motor temperature of the stepping motor are provided, and based on the pulse rate table set corresponding to the remaining amount of the recording paper. Therefore, control means for changing the pulse rate for exciting the stepping motor is provided.Therefore, by setting the pulse rate in the pulse rate table so as to suppress the heat generation of the motor, the motor temperature becomes equal to or higher than a predetermined value. At this time, the control means drives the motor at a pulse rate according to the remaining amount of recording paper, and heat generation of the motor is suppressed.

According to a sixth aspect of the invention, in addition to the configuration of the fifth aspect, a slew-up table in which a slew-up time of the motor drive corresponding to the remaining amount of recording paper and the pulse rate is set is provided, and these are controlled. When the motor temperature exceeds a predetermined value, the control means responds to the change of the pulse rate so as to change the slew-up time based on the slew-up table.

According to a seventh aspect of the present invention, a recording paper remaining amount sensor and motor temperature predicting means for predicting the motor temperature of the stepping motor are provided, and based on a current value table set corresponding to the remaining amount of recording paper. Therefore, the control means for changing the exciting current value for exciting the stepping motor is provided. Therefore, by setting the exciting current value in the current value table so as to suppress the heat generation of the motor, the motor temperature becomes equal to or higher than a predetermined value. Then, the control means drives the motor with an exciting current value according to the remaining amount of the recording paper, and heat generation of the motor is suppressed.

According to the invention described in claim 8, in addition to the configuration described in claim 7, a slew-up table in which the slew-up time of the motor drive corresponding to the remaining amount of recording paper and the exciting current value is set is provided. Since the control means for controlling is provided, when the motor temperature becomes equal to or higher than the predetermined value, the control means controls so as to change the slew-up time based on the slew-up table in response to the change of the exciting current value.

[0021]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing an embodiment of a facsimile apparatus according to claim 1 of the present invention. First, the configuration will be described. In FIG. 1A, 11 is a facsimile machine, and the facsimile machine 11 is a roll of recording paper.
It has a storage box 13 for storing 12 and a transport mechanism 15 for transporting the recording paper 12 below the thermal head 14 which is a recording unit for printing on the recording paper 12. Also, the facsimile machine 11
Is provided with a stepping motor 18 that drives the transport mechanism 15, and a control unit 19 (see FIG. 1B) that controls a pulse rate that is an excitation time for exciting the stepping motor 18.

The transport mechanism 15 is composed of a gear and a pulley for transmitting the driving force of the drive shaft 17 to the platen shaft 21A of the platen roller 21 which contacts the lower side of the thermal head 14 via the recording paper 12. The stepping motor 18 is controlled by the pulse rate (excitation time) and the excitation current value by the control means 19 so as to be driven intermittently according to the reception state of the image information at the time of reception, and the recording paper 12 is conveyed to the lower side of the thermal head 14. It is supposed to do. The recording paper 12 to be conveyed is given a constant tension by the paper guide 22.

A paper sensor 24 is a remaining amount sensor according to the present invention. The paper sensor 24 is provided on the side wall of the storage box 13 and detects the remaining amount of the recording paper 12. Reference numeral 23 denotes a thermistor which is a temperature sensor. The thermistor 23 is provided in the vicinity of the case of the stepping motor 18, detects the motor temperature Tm of the outer peripheral portion 18a of the case of the stepping motor 18, and transmits a detection signal. The present invention constantly monitors the motor temperature Tm of the stepping motor 18 by the thermistor 23, and when the motor temperature Tm reaches a predetermined value To, for example, 50 ° C. or more, the recording paper detected by the paper sensor 24.
The pulse rate for exciting the stepping motor 18 is changed by the control means 19 based on the remaining amount of 12.

FIG. 1B is a block diagram of a motor control system including the control means 19 according to the present invention. In FIG. 1B, the system bus 26 connected to the CPU (Central Processing Unit) 25 controls the drive of the thermistor 23, the paper sensor 24, the pulse rate table 27, and the stepping motor 18 in addition to the control parts normally used. A control part such as a motor controller 29 having a mechanism to operate is connected. The CPU 25 monitors and controls each control part connected to the system bus 26 according to a predetermined program. The system bus 26 is a signal line for exchanging various control signals and data between the control parts described above in the motor control system.

The pulse rate table 27 is a ROM (Read Only Me) that stores a remaining amount corresponding to the roll diameter of the recording paper 12 and an optimum pulse rate table corresponding to this remaining amount.
mory). That is, as the remaining amount of the recording paper 12 increases, the pulse rate increases, and in order to suppress the heat generation of the motor, the pulse rate is set to be smaller than the initial pulse rate in advance. , Has been set.

Next, the operation will be described. When receiving,
The stepping motor 18 is intermittently driven by a motor controller 29 at a predetermined pulse rate and exciting current according to the reception state of image information, and when the stepping motor 18 starts driving, the stepping motor 18 drives the carrying mechanism 15 to carry the paper. Mechanism 15 drives the platen shaft 21A
Then, the platen roller 21 rotates while contacting the thermal head 14 to convey the recording paper 12 from the storage box 13 to the lower side of the thermal head 14.

The CPU 25 of the control means 19 monitors the thermistor 23, and when the motor temperature Tm reaches a predetermined value To, for example, 50 ° C. or higher, the paper sensor 24 provided in the storage box 13
Detects the remaining amount corresponding to the roll diameter of the recording paper 12 on the roll, reads the optimum pulse rate corresponding to the remaining amount of recording paper 12 from the pulse rate table 27, and the motor controller 29 The stepping motor 18 is controlled to be driven at the pulse rate of. Therefore, the driving of the stepping motor 18 is changed by the motor controller 29 from the initial pulse rate to the optimum pulse rate. This optimum pulse rate is proportional to the remaining amount of the recording paper 12 and is set so as to suppress the heat generation of the motor, so that the motor temperature Tm decreases. And the motor temperature T
It continues until m becomes equal to or less than the constant value To. Motor temperature T
When m falls below a certain value To, it is controlled to return to the initial pulse rate. This operation is repeated every predetermined time. By driving the stepping motor 18 as described above, the platen roller 21 is optimally rotated, and the recording paper 12 is conveyed to the lower side of the thermal head 14 by optimal paper feeding.

When the stepping motor 18 is driven for a long time, it is expected that the motor temperature Tm of the stepping motor 18 will increase.
According to 19, the motor temperature Tm is monitored, and when the motor temperature Tm becomes equal to or higher than the constant value To, the motor is driven according to the remaining amount of the recording paper 12 and at the optimum pulse rate for suppressing heat generation of the motor. Heat generation of the motor is suppressed. Also, changing the pulse rate does not depend on the state of the drive system of the motor,
Since the drive is not performed uniquely but is driven at the optimum pulse rate according to the remaining amount of the recording paper 12, the motor temperature Tm can be effectively reduced without unnecessarily slowing the writing speed, and Optimal paper feed can be maintained.

FIG. 2 is a block diagram showing a motor control system including a control means 33 of a facsimile apparatus 31 which is an embodiment of the facsimile apparatus according to the invention of claim 2.
The same components as those in the embodiment shown in (b) are designated by the same reference numerals, and the description thereof will be omitted. Further, the entire configuration of the facsimile device 31 is the same as that shown in FIG. 1A except for the motor control system, and the description thereof will be omitted.

In the control means 33 shown in FIG. 2, 35 is a slew-up table, and the slew-up table 35 is
It is a ROM (Ramdom Access Memory) in which a motor drive corresponding to the remaining amount of the recording paper 12 and a pulse rate to be changed at that time is set as a table with an optimum slew-up time for suppressing white streaks and noise of an image. Further, when the motor temperature Tm detected by the thermistor 23 becomes equal to or higher than the predetermined value To and the pulse rate P for exciting the stepping motor 18 is changed, the control means 33 determines the optimum slew-up time based on the slew-up table 35. It is designed to be changed to.

Next, the operation will be described. 1A and 2, when the control means 33 monitors the thermistor 23 and the motor temperature Tm is equal to or higher than a predetermined value To, a motor that drives the stepping motor 18 based on the pulse rate table 27 and the slew-up table 35. Since the controller 29 is controlled, the controller 33 controls the thermistor 23 when the motor temperature Tm of the stepping motor 18 exceeds a predetermined value To.
When the optimum pulse rate P is read from the pulse rate table 27 by the detection signal from, the slew-up table 35 is referred to at the same time, and the stepping motor 18 is driven by the optimum pulse rate P and the slew-up time.

As described above, in this embodiment, since the stepping motor 18 is driven with the optimum slew-up time according to the motor driving state, the paper feeding is appropriate even if the motor driving state is changed, and White lines or noise can be suppressed. FIG. 3 is a block diagram showing a motor control system including a control means 43 of a facsimile machine 41 which is an embodiment of the facsimile machine according to the invention described in claim 3. The above-mentioned embodiment shown in FIG. Fax machine
In the motor control system of No. 11, a current value table 44 is provided instead of the pulse rate table 27, the same configurations are given the same reference numerals, and description thereof will be omitted. Further, the entire configuration of the facsimile device 41 is the same as that shown in FIG. 1A except for the motor control system, and the description thereof will be omitted.

In the control means 43 shown in FIG. 3, the current value table 44 is a ROM for storing the optimum exciting current value corresponding to the remaining amount detected by the paper sensor 24 as a table. The exciting current value is set to increase as the remaining amount of the recording paper 12 increases, and the stepping motor 18 is excited at a current value smaller than the initial exciting current value to suppress heat generation of the motor. It is set. Further, the control means 43 constantly monitors the thermistor 23, and when the motor temperature Tm detected by the thermistor 23 becomes a predetermined value To or more and the exciting current value D for exciting the stepping motor 18 is changed, the current value table 44 is displayed. Based on this, the excitation current value D is changed to the optimum value.

Next, the operation will be described. 1A and 3, the control means 43 monitors the thermistor 23 and controls the motor controller 29 that drives the stepping motor 18 based on the current value table 44 when the motor temperature Tm is equal to or higher than a predetermined value To. Therefore, the control means 43 constantly monitors the thermistor 23 of the stepping motor 18, and when the motor temperature Tm of the stepping motor 18 becomes equal to or higher than a predetermined value To, the detection signal from the thermistor 23 is used to optimize the remaining amount of the paper sensor 24. The exciting current value D is read from the current value table 44, and the motor controller 29 controls so that the stepping motor 18 is driven with the specified optimum exciting current value D which is smaller than the initial exciting current value D. Since the optimum exciting current value D is set so as to suppress the heat generation of the motor, the motor temperature Tm of the stepping motor 18 decreases and finally becomes equal to or lower than the predetermined value To. However, when the remaining amount of the recording paper 12 is large and it is not appropriate to drive the stepping motor 18 with the exciting current value D smaller than the initial exciting current value D, the driving of the stepping motor 18 is stopped at that time. , On the protocol, it sends a busy signal (busy) and stops sending data from the other party. After that, the motor temperature Tm is the predetermined value T
This state is maintained until the temperature becomes equal to or lower than o, and when the motor temperature Tm becomes equal to or lower than the predetermined value To, the initial exciting current value D is restored.

When the stepping motor 18 is driven for a long time, the motor temperature Tm of the stepping motor 18 is expected to increase.
43, the motor temperature Tm is monitored, and when the motor temperature Tm becomes equal to or higher than the constant temperature predetermined value To, the optimum exciting current value D is determined according to the remaining amount of the recording paper 12 and suppressing the heat generation of the motor. Since it is driven, heat generation of the motor is suppressed. Further, the change of the exciting current value D does not change uniquely regardless of the state of the drive system of the motor, but is driven by the optimum exciting current value D according to the remaining amount of the recording paper 12, so that the writing is performed. The motor temperature Tm can be effectively reduced and the optimum paper feed can be maintained without unnecessarily slowing down the speed.

FIG. 4 is a block diagram showing a motor control system including a control means 53 of a facsimile machine 51 which is an embodiment of the facsimile machine according to the invention of FIG.
The same components as those of the embodiment shown in FIG. The overall configuration of the facsimile machine 51 is shown in FIG.
Except for the motor control system, it is the same as that shown in (a), and description thereof is omitted.

In the control means 53 shown in FIG. 4, 55 is a slew-up table, and the slew-up table 55 is
Remaining amount of recording paper 12 and exciting current value D to be changed at that time
It is a ROM in which the optimum slew-up time for suppressing the white streaks and noises of the image of the motor drive corresponding to is set as a table. Further, when the motor temperature Tm detected by the thermistor 23 becomes equal to or higher than the predetermined value To and the exciting current value D for exciting the stepping motor 18 is changed, the control means 53 makes an optimum slew up based on the slew up table 55. It is designed to change in time.

Next, the operation will be described. 1A and 4, the control means 53 monitors the thermistor 23 and drives the stepping motor 18 based on the current value table 44 and the slew-up table 55 when the motor temperature Tm is equal to or higher than a predetermined value To. Since the motor controller 29 is controlled, the controller 53 controls the thermistor 23 when the motor temperature Tm of the stepping motor 18 becomes equal to or higher than a predetermined value To.
When the optimum excitation current value D is read from the current value table 44 by the detection signal from the
55, the stepping motor 18 is driven by the optimum exciting current value D and slew-up time.

As described above, in this embodiment, since the stepping motor 18 is driven in the optimum slew-up time according to the motor driving state, the paper feeding is appropriate even if the motor driving state is changed, White lines, noise, etc. can be suppressed. FIG. 5 is a diagram showing an embodiment of the facsimile apparatus according to the invention described in claim 5, and the same components as those of the embodiment shown in FIG.

In the facsimile device 61 shown in FIG. 5, instead of detecting the motor temperature Tm of the stepping motor 18 by the thermistor 23 of the facsimile device 11 shown in FIG.
The motor temperature predicting means 66 for constantly predicting the motor temperature Tm from the driving state of the stepping motor 18 is used. The temperature rise ΔT of the motor temperature predicting means 66 is the following equation ΔT = K × R ^0.85 (1) where R is the internal loss (copper loss) of the stepping motor 18 and K is the atmospheric pressure of the motor. It is a coefficient that changes. It is set by further studying with reference to, for example, it is mounted in the memory in the CPU and is adapted to predict the motor temperature Tm of the stepping motor 18. It is approved by the Institute of Electrical Engineers of Japan, 1990, and is described in the abstracts on pages 7-162.

FIG. 5B is a block diagram showing a motor control system including the control means 63 of the facsimile apparatus 61. In the motor control system shown in FIG.
The motor temperature predicting means 66 described above is mounted in the memory in the CPU instead of 23. The same components are designated by the same reference numerals and the description thereof will be omitted. Control means 63 is motor temperature prediction means
The motor temperature Tm of the stepping motor 18 is constantly monitored by 66, and when the motor temperature Tm exceeds a predetermined value To, the pulse rate table 27 is used by the pulse rate table 27 based on the remaining amount of the recording paper 12 detected by the paper sensor 24. It is designed to change to the optimum pulse rate for exciting 18.

Next, the operation will be described. FIG. 5 (a),
In (b), the control means 63 constantly monitors the motor temperature Tm of the stepping motor 18 by the motor temperature prediction means 66, and when the motor temperature Tm is equal to or higher than a predetermined value To, based on the pulse rate table 27 and the paper sensor 24. Since the motor controller 29 for driving the stepping motor 18 is controlled, the control means 63 constantly monitors the motor temperature Tm of the stepping motor 18 by the motor temperature predicting means 66, and the motor temperature Tm of the stepping motor 18 is set to the predetermined value Tm.
When the temperature exceeds o, the optimum pulse rate P corresponding to the remaining amount of the paper sensor 24 is read from the pulse rate table 27 by the signal from the motor temperature predicting means 66, and the motor controller 29 becomes smaller than the initial pulse rate P. ,
The stepping motor 18 is controlled to be driven at the designated optimum pulse rate P. Since the optimum pulse rate P is set so as to suppress the heat generation of the motor, the motor temperature Tm of the stepping motor 18 decreases and finally becomes equal to or lower than the predetermined value To.

When the stepping motor 18 is driven for a long time, the motor temperature Tm of the stepping motor 18 is expected to increase.
To monitor the motor temperature Tm, and when the motor temperature Tm becomes equal to or higher than a constant temperature predetermined value To, to drive at an optimum pulse rate P according to the remaining amount of the recording paper 12 and suppressing heat generation of the motor. The heat generation of the motor is suppressed. Further, the pulse rate P is not changed uniquely regardless of the state of the drive system of the motor, but is driven at the optimum pulse rate P according to the remaining amount of the recording paper 12, so the writing speed is Without unnecessarily slowing down the motor temperature T
m can be effectively reduced, and optimum paper feeding can be maintained.

FIG. 6 is a block diagram showing a motor control system including a control means 73 of a facsimile machine 71 which is an embodiment of the facsimile machine according to the invention of claim 6 and is shown in FIG. The same configurations as in the example are given the same symbols,
The description is omitted. Further, the entire configuration of the facsimile device 71 is the same as that shown in FIG. 5A except the motor control system, and the description thereof will be omitted.

In the control means 73 shown in FIG. 6, reference numeral 75 is a through-up table, and the through-up table 75 is
This is a ROM in which the motor drive corresponding to the remaining amount of the recording paper 12 and the changing pulse rate P at that time is set as a table with an optimum slew-up time for suppressing white streaks and noise of an image. Further, when the motor temperature Tm predicted by the motor temperature predicting means 66 becomes equal to or higher than the predetermined value To and the pulse rate P for exciting the stepping motor 18 is changed, the control means 73 optimizes based on the through-up table 75. It is designed to change the slew-up time.

Next, the operation will be described. In FIGS. 5A and 6, the control means 73 is a motor temperature predicting means 66.
Constantly monitors the motor temperature Tm predicted by
When m is equal to or greater than the predetermined value To, the stepping motor 18 is determined based on the pulse rate table 27 and the paper sensor 24.
When the motor temperature Tm of the stepping motor 18 becomes equal to or higher than a predetermined value To, the control means 73 controls the motor controller 29 that drives the motor controller 29.
When reading from 27, refer to the paper sensor 24 at the same time,
The stepping motor 18 is driven by the optimum pulse rate P and slew-up time.

As described above, in this embodiment, since the stepping motor 18 is driven in the optimum slew-up time according to the motor driving state, the paper feeding is appropriate even if the motor driving state is changed, and White lines, noise, etc. can be suppressed. FIG. 7 is a facsimile apparatus as an embodiment of the facsimile apparatus according to the present invention.
FIG. 9 is a block diagram showing a motor control system including a control means 83 of 81, in which a current value table 84 is provided instead of the pulse rate table 27 in the motor control system of the above-mentioned embodiment 61 shown in FIG. 5B. Therefore, the same components are denoted by the same reference numerals and the description thereof will be omitted. Further, the entire configuration of the facsimile device 71 is the same as that shown in FIG. 5A except for the motor control system, and a description thereof will be omitted.

In the control means 83 shown in FIG. 7, the current value table 84 is a ROM for storing the optimum exciting current value corresponding to the remaining amount detected by the paper sensor 24 as a table. The exciting current value is increased as the remaining amount of the recording paper 12 is large, and by exciting the stepping motor 18 with a current value smaller than the initial exciting current value, to suppress heat generation of the motor, It is set. Further, the control means 83 constantly monitors the motor temperature predicting means 66, and the motor temperature Tm predicted by the motor temperature predicting means 66 becomes equal to or higher than a predetermined value To, and changes the exciting current value D for exciting the stepping motor 18. At this time, the optimum exciting current value D is changed based on the current value table 84.

Next, the operation will be described. In FIGS. 5A and 7, the control means 83 is a motor temperature predicting means 66.
Is constantly monitored, and when the motor temperature Tm is equal to or higher than a predetermined value To,
Since the motor controller 29 that drives the stepping motor 18 is controlled based on the current value table 84, the control means
83 constantly monitors the motor temperature predicting means 66 of the stepping motor 18, and when the motor temperature Tm of the stepping motor 18 becomes equal to or higher than a predetermined value To, an optimum signal corresponding to the remaining amount of the paper sensor 24 by a signal from the motor temperature predicting means 66. The exciting current value D is read from the current value table 84, and the motor controller 29 controls so that the stepping motor 18 is driven at the optimum exciting current value D which is smaller than the initial exciting current value D. Since the optimum exciting current value D is set so as to suppress the heat generation of the motor, the motor temperature Tm of the stepping motor 18 decreases and finally becomes equal to or lower than the predetermined value To. However, when the remaining amount of the recording paper 12 is large and it is not appropriate to drive the stepping motor 18 with the exciting current value D smaller than the initial exciting current value D, the driving of the stepping motor 18 is stopped at that time. , On the protocol, it sends a busy signal (busy) and stops sending data from the other party. Thereafter, this state is maintained until the motor temperature Tm becomes equal to or lower than the predetermined value To, and when the motor temperature Tm becomes equal to or lower than the predetermined value To, the initial exciting current value D is restored. When the stepping motor 18 is driven for a long time, the motor temperature Tm of the stepping motor 18 is expected to increase. As described above, the control means 83 monitors the motor temperature Tm and the motor temperature Tm. When the temperature exceeds a predetermined value To, the motor is driven in accordance with the remaining amount of the recording paper 12 and at the optimum exciting current value D that suppresses heat generation of the motor, so that heat generation of the motor is suppressed. Further, since the change of the exciting current value D is not made to change uniquely regardless of the state of the drive system of the motor, the exciting current value D is driven by the optimum exciting current value D according to the remaining amount of the recording paper 12, Without slowing down the writing speed unnecessarily,
The motor temperature Tm can be effectively reduced and optimum paper feeding can be maintained.

FIG. 8 is a block diagram showing a motor control system including a control means 93 of a facsimile machine 91 which is a facsimile machine according to an eighth aspect of the present invention, and has the same construction as the embodiment shown in FIG. 5B. Are denoted by the same reference numerals and description thereof will be omitted. Further, the entire configuration of the facsimile device 91 is shown in FIG.
The configuration is the same as that shown in (a) except for the motor control system, and description thereof will be omitted.

In the control means 93 shown in FIG. 8, 95 is a through-up table, and the through-up table 35 is
This is a ROM in which a motor drive corresponding to the remaining amount of the recording paper 12 and a pulse rate to be changed at that time is set as a table with an optimum slew-up time for suppressing white streaks and noise of an image. The control means 93 is a motor temperature predicting means.
When the motor temperature Tm detected by 66 becomes equal to or higher than the predetermined value To and the exciting current value D for exciting the stepping motor 18 is changed, the optimum slew-up time is changed based on the slew-up table 95. ing.

Next, the operation will be described. In FIGS. 5A and 8, the control means 93 is a motor temperature predicting means 66.
Is constantly monitored, and when the motor temperature Tm is equal to or higher than a predetermined value To,
Since the motor controller 29 that drives the stepping motor 18 is controlled based on the current value table 84 and the slew-up table 95, the controller 93 predicts the motor temperature when the motor temperature Tm of the stepping motor 18 becomes equal to or higher than a predetermined value To. When the optimum exciting current value D is read from the current value table 84 by the signal from 66, the paper sensor 24 is referred to at the same time, and the stepping motor 18 is driven by the optimum exciting current value D and the slew-up time.

As described above, in this embodiment, since the stepping motor 18 is driven in the optimum slew-up time according to the motor driving state, the paper feeding is appropriate even if the motor driving state is changed, and White lines, noise, etc. can be suppressed.

[0054]

As described above, according to the present invention as set forth in claim 1, the motor temperature Tm is monitored by the control means, and when the motor temperature Tm exceeds the predetermined value To, the recording paper 12 remains. The heat generation of the motor is suppressed by driving the motor according to the amount and at the optimum pulse rate for suppressing the heat generation of the motor. Further, the pulse rate is not changed uniquely regardless of the state of the motor drive system, but is driven at an optimum pulse rate according to the remaining amount of the recording paper 12, so that the writing speed is not changed. Without slowing you down,
The motor temperature Tm can be effectively reduced and optimum paper feeding can be maintained.

According to the second aspect of the present invention, in addition to the above-mentioned function and effect, the stepping motor 18 is driven for an optimum slew-up time according to the state of motor driving, thereby changing the state of motor driving. However, the paper feeding is appropriate, and it is possible to suppress image white lines, noise, and the like. According to the third aspect of the invention, the motor temperature Tm is monitored by the control means, and the motor temperature Tm is the predetermined value T.
When it becomes equal to or more than 0, the heat generation of the motor is suppressed by driving the motor 12 according to the remaining amount of the recording paper 12 and the optimum excitation current value D for suppressing the heat generation of the motor. Further, since the change of the exciting current value D is driven by the optimum exciting current value D according to the remaining amount of the recording paper 12, the writing speed is not unnecessarily slowed down, and the motor temperature Tm can be effectively reduced. And, the optimum paper feeding can be maintained.

Further, according to the invention described in claim 4, in addition to the above-mentioned function and effect, the stepping motor 18 is driven for an optimum slew-up time according to the state of the motor drive, thereby changing the state of the motor drive. However, the paper feeding is appropriate, and it is possible to suppress image white lines, noise, and the like. According to the fifth aspect of the invention, the control means constantly monitors the motor temperature Tm, and when the predicted motor temperature Tm becomes equal to or higher than the constant temperature predetermined value To, the recording paper
The heat generation of the motor is suppressed by driving the motor in accordance with the remaining amount of 12 and at the optimum pulse rate P for suppressing the heat generation of the motor. Further, the pulse rate P is not changed uniquely regardless of the state of the drive system of the motor, but is driven at the optimum pulse rate P according to the remaining amount of the recording paper 12, so the writing speed is The motor temperature Tm can be effectively reduced and the optimum paper feed can be maintained without unnecessarily slowing down.

According to the sixth aspect of the present invention, in addition to the above-described effects, the stepping motor 18 is driven in an optimum slew-up time according to the motor driving state, so that the motor driving state is changed. However, paper feeding is appropriate,
Image white streaks, noise, etc. can be suppressed.
Further, according to the invention of claim 7, the motor temperature Tm is always predicted, and when the predicted motor temperature Tm becomes equal to or higher than a constant temperature predetermined value To, depending on the remaining amount of the recording paper 12, and Since the driving is performed with the optimum excitation current value D that suppresses heat generation of the motor, heat generation of the motor is suppressed. Further, since the change of the exciting current value D is driven by the optimum exciting current value D according to the remaining amount of the recording paper 12, the writing speed is not unnecessarily slowed down, and the motor temperature Tm can be effectively reduced. And, the optimum paper feeding can be maintained.

According to the invention of claim 8, in addition to the above-mentioned effects, the stepping motor 18 is driven in an optimum slew-up time according to the state of motor driving, so that the state of motor driving is changed. However, paper feeding is appropriate,
Image white streaks, noise, etc. can be suppressed.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of a facsimile apparatus according to the present invention as set forth in claim 1, (a) is a schematic front view thereof,
(B) is a block diagram showing the motor control system.

FIG. 2 is a block diagram showing a motor control system of an embodiment of a facsimile apparatus according to the present invention.

FIG. 3 is a block diagram showing a motor control system of an embodiment of a facsimile apparatus according to the invention of claim 3;

FIG. 4 is a block diagram showing a motor control system of an embodiment of a facsimile apparatus according to the present invention.

5A and 5B are views showing an embodiment of a facsimile apparatus according to the invention of claim 5, wherein FIG. 5A is a schematic front view thereof, and FIG.
FIG. 3 is a block diagram showing the motor control system.

FIG. 6 is a block diagram showing a motor control system of an embodiment of a facsimile apparatus according to the invention of claim 6;

FIG. 7 is a block diagram showing a motor control section showing an embodiment of a facsimile apparatus according to the invention of claim 7;

FIG. 8 is a block diagram showing a motor control section showing an embodiment of a facsimile apparatus according to the present invention.

FIG. 9 is a graph showing the relationship between the temperature rise of the motor temperature of a conventional stepping motor and the exciting current value.

[Explanation of symbols]

 11, 31, 41, 51, 61, 71, 81, 91 Facsimile device 12 Recording paper 13 Storage box 14 Thermal head (recording section) 18 Stepping motor 19, 33, 43, 53, 63, 73, 83, 93 Control means 23 Thermistor (temperature sensor) 24 Paper sensor (remaining amount sensor) 35, 55, 75, 95 Through-up table 44, 84 Current value table 66 Motor temperature predicting means Tm Motor temperature To predetermined value P Pulse rate D Exciting current value

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI Technical indication H04N 1/00 108 M 7046-5C

Claims (8)

[Claims] 1. A storage box for storing recording paper wound in a roll shape, a transport mechanism for transporting the recording paper to a recording unit, a stepping motor for driving the transport mechanism, and an excitation for exciting the stepping motor. And a control unit for controlling a pulse rate, which is a time, in a facsimile apparatus that intermittently drives a stepping motor in accordance with a reception state of image information to convey the recording paper at the time of reception, and stores the recording paper in the storage box. A remaining amount sensor for detecting the remaining amount is provided, and a temperature sensor for detecting the motor temperature of the outer peripheral portion of the stepping motor is provided, and the control means detects the remaining amount sensor when the motor temperature exceeds a predetermined value. Based on the pulse rate table in which the pulse rate corresponding to the remaining amount is set, the stepping motor is operated while the motor temperature is equal to or higher than a predetermined value. Facsimile apparatus characterized by changing the pulse rate to be excited. 2. A slew-up table in which a slew-up time of motor driving corresponding to the remaining amount of the recording paper and the pulse rate is set is provided, and the control means makes the detected motor temperature equal to or higher than a predetermined value. 2. The facsimile apparatus according to claim 1, wherein when the pulse rate for exciting the stepping motor is changed, the slew-up time is changed based on the slew-up table. 3. A storage box for storing recording paper wound into a roll, a transport mechanism for transporting the recording paper to a recording unit, a stepping motor for driving the transport mechanism, and an excitation for exciting the stepping motor. Control means for controlling the current value,
In a facsimile apparatus that conveys the recording paper by intermittently driving a stepping motor in accordance with a reception state of image information at the time of reception, with a remaining amount sensor that detects the remaining amount of the recording paper in the storage box, A temperature sensor for detecting the motor temperature of the outer peripheral portion of the stepping motor is provided, and the control means sets the exciting current value corresponding to the remaining amount detected by the remaining amount sensor when the motor temperature exceeds a predetermined value. A facsimile apparatus, wherein an exciting current value for exciting the stepping motor is changed while the motor temperature is equal to or higher than a predetermined value based on a current value table. 4. A slew-up table in which a slew-up time of motor drive corresponding to the remaining amount of the recording paper and the exciting current value is set is provided, and the control means sets the motor temperature to a predetermined value or more, and the stepping is performed. 4. The facsimile apparatus according to claim 3, wherein when the exciting current value for exciting the motor is changed, the slew-up time is changed based on the slew-up table. 5. A storage box for storing recording paper wound in a roll shape, a transport mechanism for transporting the recording paper to a recording unit, a stepping motor for driving the transport mechanism, and an excitation for exciting the stepping motor. And a control unit for controlling a pulse rate, which is a time, in a facsimile apparatus that intermittently drives a stepping motor in accordance with a reception state of image information to convey the recording paper at the time of reception, and stores the recording paper in the storage box. A remaining amount sensor for detecting the remaining amount is provided, and a motor temperature predicting unit for predicting a motor temperature from the driving state of the stepping motor is provided, and the control unit, when the predicted motor temperature becomes a predetermined value or more,
A facsimile apparatus characterized in that the pulse rate for exciting the stepping motor is changed while the motor temperature is equal to or higher than a predetermined value based on a pulse rate table in which a pulse rate corresponding to the remaining amount detected by the remaining amount sensor is set. .. 6. A slew-up table in which a slew-up time of motor drive corresponding to the remaining amount of the recording paper and the pulse rate is set is provided, and the control means makes the predicted motor temperature equal to or higher than a predetermined value. 6. The facsimile apparatus according to claim 5, wherein when the pulse rate for exciting the stepping motor is changed, the slew-up time is changed based on the slew-up table. 7. A storage box for storing recording paper wound in a roll shape, a transport mechanism for transporting the recording paper to a recording unit, a stepping motor for driving the transport mechanism, and an excitation for exciting the stepping motor. Control means for controlling the current value,
In a facsimile apparatus that conveys the recording paper by intermittently driving a stepping motor in accordance with a reception state of image information at the time of reception, with a remaining amount sensor that detects the remaining amount of the recording paper in the storage box, A motor temperature predicting means for predicting a motor temperature from a driving state of the stepping motor is provided, and the control means excites an amount corresponding to a remaining amount detected by a remaining amount sensor when the predicted motor temperature exceeds a predetermined value. A facsimile apparatus, wherein an exciting current value for exciting the stepping motor is changed while the motor temperature is equal to or higher than a predetermined value based on a current value table in which current values are set. 8. A slew-up table in which a slew-up time of motor drive corresponding to the remaining amount of the recording paper and the exciting current value is set is provided, and the control means makes the predicted motor temperature equal to or higher than a predetermined value. 8. The facsimile apparatus according to claim 7, wherein when the exciting current value for exciting the stepping motor is changed, the slew-up time is changed based on the slew-up table.