JPS6198365A - Copying machine - Google Patents

Abstract

PURPOSE:To release a preheating mode without a specific operation and to improve the handling of a copying machine by forming a control means for releasing the preheating mode and setting a control means for releasing the preheating mode and setting a waiting mode when a detecting signal is outputted from a platen opening/closing detecting means at the selection of the preheating mode. CONSTITUTION:When a routine is executed and any one of keys on an operation display part is depressed at the time of the preheating mode, a control part of the machine body releases the preheating mode. Namely, if the platen PB is opened, an original to be copied is set on a contact glass 101 and then the platen PB is closed to execute copying when the copying machine 100 is not used and waited at the preheating mode, the preheating mode is automatically released. When the original is extracted from the contact glass 101 after the end of copying, the platen PB is opened/closed at a mode other than the preheating mode. If the result of decision 21 is YES and the result of decision 22 is NO, the control part inhibits left original alarming buzzer processing for alarming the unremoval of the original from the contact glass 101 after the end of copying.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a copying machine having a standby mode and a preheating mode.

[Prior Art] In recent years, copying machines equipped with a preheating mode in addition to a standby mode have been put into practical use in order to reduce power consumption during non-copying operations. In this preheating mode, the temperature of the fixing roller in the fixing section is lowered, and the display on the operation display section, which forms the man-machine interface (user interface) between the operator and the copying machine, is turned off.

Reduces power consumption.

However, with such a copying machine, it is not possible to immediately move to copying operation from the state where the preheating mode is selected.
It is necessary to press the preheating mode key to cancel the preheating mode setting and then return to the normal standby mode, which requires extra effort and is inconvenient to use, creating a burden on the operator.

In addition, it is easy to cancel preheating mode, especially if the preheating mode display is difficult to see or if the preheating mode key is installed in a location that is difficult to see.)1o□7o/<L
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There was also a problem.

[Purpose] The present invention was made in order to solve the above-mentioned drawbacks of the prior art, and an object of the present invention is to provide a copying machine that allows canceling the preheating mode without any special operation and improves usability. shall be.

[Configuration] In order to achieve this object, the present invention provides a pressure plate opening/closing detection means for detecting opening/closing of the document pressure plate that brings the document into close contact with the document from the back side, and cancels the preheating mode even when the pressure plate is opened or closed. As a result, the preheating mode is automatically canceled when the operator performs a preliminary operation for using the copying machine.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows a copying machine according to an embodiment of the present invention. In this embodiment, a copying machine 100 has a configuration in which a paper collating device (hereinafter referred to as a sorter) 200 is attached.

In the copying machine 100, 101 is a contact glass on which a copy original is placed, 102 is an optical system that scans the copy original on the contact glass 101, and this optical system 1102
・The image of the copy original in the range 1 arbitrary 1 of 50 to 141%
It has a function to change the magnification.

Inside 103 is a drum-shaped photoreceptor, 104 is a charger that uniformly charges the surface of the photoreceptor 103, and 105 is an eraser for removing surface charges of the photoreceptor 103 in areas that do not correspond to the original image. The surface of the body 103 is the optical system 1
02, and an electrostatic latent image corresponding to the original image is formed.

This electrostatic latent image is developed with toner by a developing device 106.

107 and 108 are paper feed cassettes that respectively store different copy sheets; 109 and 110 are paper feed rollers that send out copy sheets from the paper feed cassettes 107 and 108, respectively; 11
Reference numeral 1 denotes a registration roller that feeds the copy paper to the photoreceptor 103 at a predetermined timing, and 112 a transfer charger that transfers the toner image on the photoreceptor 103 onto the copy paper.

Reference numerals 113 and 114 denote a separation charger and a separation claw for separating the copy paper from the photoreceptor 103, 115 a conveyor belt for conveying the separated copy paper, and 116 a fixing device for fixing the toner image by heat-pressing the copy paper. , 117 is a transport roller that sends out the copy paper after fixing to the sorter 200, 118 is a discharge sensor that detects that the copy paper is being discharged, and 119 is a conveyance roller that sends the copy paper to the sorter 200.
This is a guide board to guide you.

Further, 120 is a cleaner for removing residual toner on the surface of the photoreceptor 103, 121 is a static elimination lamp for removing residual charges on the surface of the photoreceptor 103, and 122, 123, 1
24, 125, 126 and 127 are guide plates for guiding the copy paper along the conveyance path.

Note that the sorter 200 is not directly related to the present invention, so
A detailed explanation thereof will be omitted.

Further, as shown in detail in FIG. 2, a pressure plate PB is attached to the upper surface of the housing of the copying machine 100 for pressing the original from the back side and bringing it into close contact with the contact glass 101.

In order to detect that this pressure plate PB is opened and closed.

Magnet MG attached to pressure plate PB and contact glass 1
A pressure plate opening/closing detector consisting of a reed switch LS attached to the upper surface of the housing of the copying machine 100 near the copying machine 100 is provided. The output signal of this reed switch LS is applied to a main body control section 100a of the copying machine 100, which will be described later.

FIG. 3 shows the detailed structure of the chest 120.

In the figure, 120a is a pre-cleaning charger that eliminates residual toner, 120b is a fur brush that rotates in the same direction as the photoreceptor 103 and removes foreign matter such as paper dust,
120c is a cleaning blade for scraping off residual toner from the surface of the photoreceptor 103, and 120d is a blade cleaner for removing dirt such as paper powder adhering to the cleaning blade 120a.

Further, this cleaning blade 120c is used in the copying machine 10.
When the power is turned on at 0, pressure is applied to the photoreceptor 103 by a solenoid and a link mechanism (not shown), and when the power is turned off or in preheating mode, it is retracted in the direction of the arrow to the position shown by the broken line in the figure. Furthermore, during this evacuation, the tip of the cleaning blade 120c is attached to the blade cleaner 120d.
The cleaning blade 120c is scrubbed to remove dirt from the cleaning blade 120c.

FIG. 4 illustrates the control system of this embodiment.

In the figure, a main body control section 100a of a copying machine 100 and a control section 200a of a softer 200 are both microprocessors and ROMs (read-only memories) that store control programs corresponding to each device.

RAM (random access,
(memory), and input/output circuits corresponding to each device.

The operation display section 100b also includes various input keys for inputting the operation mode of the copying machine 100, variable magnification, selection of paper cassette, designation of the number of copies, start of printing, etc.
The copier 1 is equipped with various indicators to display the setting status.
It is attached at an appropriate location on the top surface of the 00 housing.

FIG. 5 shows an example of the operation display section 100b.

In the figure, 130 is a preheating mode key for selecting a preheating mode that lowers the temperature of the fixing device 116 and turns off the display on the operation display section 100b to reduce power consumption during standby; 131 is a preheating mode key for reducing the temperature of the copy document This is a blue erase key for removing ruled lines, and when you turn on this blue erase key 131 and select the blue erase mode, the light in the optical system 102 (the power supply voltage of the source lamp becomes slightly higher and the amount of light emitted increases; □1 Well, with this, the blue ruled lines will disappear from the copied image.

132 is a print key for inputting a copy start instruction to the main body control unit 100a, 133 is a numeric keypad for inputting the number of copies, etc., 133a is a clear/stop key for canceling the input of the numeric keypad 133, and 134 is a split key. An interrupt key 135 is used to select the dark mode, a density decrease key 135 is used to reduce the copy density, and a density increase key 136 is used to increase the copy density. When the density decrease key 135 and the density increase key 136 are turned on once, the copy density changes by one step, and if they are kept on, the density changes by one step every unit time.

Reference numeral 137 is a paper feed selection key for switching the selection state of the paper feed cassettes 107 and 108, and each time this paper feed selection key 137 is turned on, the selection state of the paper feed cassettes 107 and 108 is switched. The size of the copy paper stored in each of the paper feed cassettes 107 and 108 and the paper feed cassette selected by the paper feed selection key 137 are as follows.

It is displayed on the display 170.

138 is the original selection for setting the copy original size.
! This is a selection key, and each time this original selection key 138 is turned on, the set original size changes from ^3 → B4 → A4 →
It changes cyclically as B5→A5→B6→A3→...

139 is the same size key for setting the copy magnification to the same size, 1
40 is a reduction key for setting the reduction copy mode and its magnification, and 141 is an enlargement key for setting the enlargement copy mode and its magnification. Shrink? c-14
Each time 0 is turned on, the reduction ratio is 93% → 87% → 82% →
It changes cyclically as 71%→61%→50%→93%→... Also, each time the enlargement key 141 is turned on, the enlargement ratio changes from 115% to 122% to 141%.
→115%→... It changes cyclically.

142 is a page continuous shooting key for selecting a page continuous shooting mode. In this page continuous copying mode, images of a copy document placed vertically on the contact glass 101 are
In this mode, the image is divided into two parts and each image is copied onto copy paper of a size smaller than the original size. Therefore, two sheets (two sets) of copy sheets on which different images are copied are obtained from one copy original.

143 is a stack key for selecting a stack mode of the sorter 200, and 144 is a sort key for selecting a sort mode of the sorter 200. Operation signals of these stack keys 143 and sort keys 144 are transmitted from the main body control unit 100a to the sorter. The information is transmitted to the control unit 200a of the sorter 200 and the operation mode of the sorter 200 is selected.

145 is a binding margin right selection key for setting the binding margin to the right, and 146 is a binding margin left selection key for setting the binding margin to the left. This binding margin is provided by shifting the image by changing the paper feeding timing of the registration rollers 111 back and forth from a predetermined state. In addition, when providing a regular binding margin,
A reduction rate of 93% is often set to prevent the image from being missing, and the amount of binding margin is set using the numeric keypad 133.

147 is a zoom down key + that decreases the magnification ratio by 1%,
Reference numeral 148 is a zoom up key that increases the magnification ratio by 1%, and the zoom down key 147 and the zoom up key 14g have a function of changing the magnification ratio by 1% every unit time when the zoom down key 147 and zoom up key 14g are kept on. ing.

Additionally, a preheating mode key 130. Blue Erase Ski-13
1. When the page continuous copy key 142, stack key 143, sort key 144, binding margin right selection key 145, and binding margin left selection key 146 are in the ON state, the light emitting diode 150.
151, 152, 152, 154, 155 and 156
are displayed respectively. In addition, print key 13
2 has green and red light emitting diodes built into the key tops, which light up in green when printing is possible and red when printing is not possible.

By the way, this copying machine 100 does not have a double-sided copying function, but since this operation display section 100b is used in common with a copying machine that also has a double-sided copying function (the path shown), three types of duplex modes can be set. A double-sided L key 161, a double-sided 2 key 162, and a double-sided 3 key 163 are also provided.

When the double-sided 1 key 161 is turned on, the light emitting diode 164
lights up and an image is formed on only one side1
Duplex l mode is selected to copy the images of two originals (generally of the same size) onto the front and back sides of one copy paper. When the 0 duplex 2 key 162 is turned on, the light emitting diode 165 lights up. At the same time, the duplex 2 mode is selected, in which the image of the document, on which images are formed on both sides, is copied onto both sides of one sheet of copy paper. 3 keys on both sides 16
When 3 is turned on, the light emitting diode 166 lights up, and the image of a document placed vertically or an open book is displayed as 2.
Divide into. Three duplex modes are selected in which each image is copied onto the front and back sides of one sheet of copy paper.

In this embodiment, the unused portions corresponding to the duplex mode keys 161 to 163 and the light emitting diodes 164 to 166 are fitted with blind plates or the like.

In addition to the paper feed selection status and paper feed size, the display 170 also displays the number entered from the numeric keypad 133, the number of copies, the amount of binding margin adjustment, and an error message when an error is discovered during self-diagnosis. Interrupt mode display, warning display indicating that the number of settings has become excessive, message indicating whether copy is possible, operation of the optical system 102, running display, copy density display, oil end display, toner end display, jam/unload display, etc. It provides various displays such as door open display, paper cassette remaining amount display, pepper end display, and variable magnification.

With such a configuration, the main body control section 100a executes the routine shown in FIG. 6 in the standby state to set/cancel the preheating mode. Note that this routine
This is a part of the copying machine control main routine executed by the main body control unit 100a, and the main routine is executed cyclically while the power is turned on. executed repeatedly.

First, when the preheating mode key 130 is not turned on (the result of determination 11 is No), the main body control section 100a performs the following steps.

The preheating mode key set flag FKPH for determining the ON timing of the preheating mode key 130 is reset (process 12), and the process immediately returns to the original routine.

When the preheating mode key 130 is turned on (result of judgment 11 is YES), it is determined whether or not the preheating mode key set flag FKPH is set (determination 13), and if it is not set (result of judgment 13 is NO). After setting the preheating mode key set flag FKPH (process 14), the preheating flag F indicating that the preheating mode is in progress is set.
P) Determine the state of l (decision 15).

If the result of determination 15 is No, that is, immediately after the preheating mode key 130 is turned on during the normal standby mode,
Sets the preheating flag FPI (and lights up the light emitting diode 150 to indicate that it is in the preheating mode (process 16)), lowers the temperature of the fixing device 116 by a predetermined value, retracts the cleaning blade 120c from the photoreceptor 103, Furthermore, a preheating mode process 17 is executed to turn off the display on the operation display section 100b other than the preheating display.

When the result of judgment 15 is YES, that is, when the preheating key 130 is turned on again while the preheating mode is set, the preheating flag FPH is reset and the light emitting diode 150 is turned off to cancel the preheating mode display. Process 18), return the temperature of the fixing device 116 to the fixing temperature, pressurize the cleaning blade 120C against the photoreceptor 103,
Further, a preheating mode cancellation process 19 is executed to restore the display on the operation display section 100b other than the preheating display.

Note that while the preheating mode key 130 is on, the result of judgment 13 is YES, so the process 14 and subsequent steps are not executed and the process immediately returns.

Further, the main body control section 100a executes the routine shown in FIG. 7, and cancels the preheating mode when any key on the operation display section 100b is operated during the preheating mode.

That is, the main body control unit 100a first determines whether or not the reed switch LS forming the pressure plate opening/closing detector is turned on or off and the pressure plate PB is opened or closed (21).
If the result is YES, it is determined whether the preheating flag FPH is set (determination 22), and this determination 22
If the result is YES, the preheating flag FPH4 is reset and the light emitting diode 150 is turned off to cancel the preheating mode display (23), and the fixing device 1161
Return the temperature to the fixing temperature, and then remove the cleaning blade I.
□' 120c is applied to the photoreceptor 103,
Further, a preheating mode cancellation process 24 is executed to restore the display on the operation display section 100b other than the preheating display.

Therefore, for example, when the copying machine 100 is in use and waiting in the preheating mode, the operator opens the pressure plate PB to make a copy, sets the copy original on the contact glass 101, and closes the pressure plate PB. , preheating mode is automatically canceled.

Furthermore, if the pressure plate PB is opened or closed in a state other than the preheating mode, this is the case when the operator takes out the document from the contact glass 101 after copying is completed, and at this time, the result of 1 judgment 21 is YES and the result of judgment 22 is YES. NO and 1
The main body control unit 100a prohibits the document forgetting buzzer process for warning that the document has not been removed from the contact glass 101 after copying is completed (process 25).

In this way, if the operator performs a preliminary operation for copying during the preheating mode, the preheating mode is automatically canceled and the normal standby mode is restored, so the operator does not have to manually cancel the preheating mode each time. No need to worry.
1. In 1 and above, the explanation of the copy control processing etc. executed by the main body control unit 100a is omitted for the sake of brevity. The pressure plate opening/closing detector that detects opening/closing of the pressure plate is not limited to the configuration in the above-described embodiment, and may have another configuration.

[Effects] As explained above, according to the present invention, when the operator performs a preliminary operation for copying during the preheating mode, the preheating mode is automatically canceled and returns to the normal standby mode. There is no need to manually cancel the preheating mode each time, and the usability of the copying machine is improved.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram showing a copying machine according to an embodiment of the present invention, FIG. 2 is a partial perspective view showing how the pressure plate is attached,
Fig. 3 is a sectional view showing details of the cleaner, Fig. 4 is a block diagram showing an example of the control system, Fig. 5 is a front view illustrating the operation display section, and Fig. 6 is a main body control section executed. Flowchart showing the control processing routine. FIG. 7 is a flowchart showing another control processing routine executed by the main body control section. 100... Copying machine, 100a... Main body control unit, 10
0b...Operation display section Pa...Press plate, MG...Magnet, LS...Reed switch. '-re9

Claims (1)

[Claims] In a copying machine equipped with a preheating mode and a standby mode, a pressure plate opening/closing detection means detects whether a document pressure plate that brings the document into close contact with the back side is opened or closed; and when the preheating mode is selected, the pressure plate opening/closing detection means detects. A copying machine characterized by comprising a control means for canceling a preheating mode and setting a standby mode when a signal is output.