JP2795914B2 - Electrostatic recording device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an electrostatic recording device such as a copying machine.

2. Description of the Related Art In general, a desktop electrostatic recording device requires a compact design, and at the same time, operability is regarded as important.
Conventionally, a compact design of this type of electrostatic recording apparatus is disclosed in, for example, JP-A-60-12563. This is provided with a transfer paper feeder that is freely openable and closable in the apparatus main body and forms a part of the apparatus main body cover when the transfer paper is closed. Can be sequentially supplied and copied, so that the whole is reduced in size and weight.

Problems to be Solved by the Invention However, in consideration of the operation, in copying, the power supply switch is turned on after opening the transfer paper feeding table (or in the reverse order) to enable the copy operation and perform the copy operation. Generally, after the power supply is turned off, the transfer paper feeder is closed (or in the reverse order) so that the transfer paper feeder is in an unused storage state. That is, unlike the stationary type, in addition to the need to open and close the transfer paper feeder, the power switch needs to be turned on and off, which is troublesome. In particular, if the power switch is turned on later (this is common),
Although the transfer paper is already set, it takes time to preheat the fluorescent lamp heater, the fixing heater, and the like after the power is turned on, and it takes a long time before copying can be actually performed. Furthermore, the user often forgets to turn off the power switch after use.

Means for Solving the Problems After the surface of the endless belt-shaped photoreceptor is uniformly charged by charging means, the original fed and conveyed by the original feeding and conveying means is exposed by an exposure optical system, and the reflected light is used for the exposure. An electrostatic latent image is formed on the photoreceptor, the electrostatic latent image is visualized by a developing unit, and the visualized image is transferred by a transfer unit onto a transfer sheet fed and transported by a transfer sheet feed unit. Transcribe,
In an electrostatic recording apparatus in which an image transferred to a transfer paper is fixed by a fixing unit, in the vicinity of the photoconductor,
The process units of the charging unit, the document feeding and conveying unit, the exposure optical system, the developing unit, the transferring unit, the fixing unit, and the transfer sheet feeding and conveying unit are arranged and provided in a main body case. A document feeding table is provided in the document feeding section of the document feeding and conveying means so as to be openable and closable, and a transfer paper feeding table is provided in the transfer paper feeding section of the transfer paper feeding and conveying means so as to be openable and closable. A first power switch that is turned on when the paper table is opened to the paper feeding position and a second power switch that is turned on when the transfer paper paper table is opened to the paper feeding position are provided. The power is turned on when both power switches are turned on, and the power is turned off when one of the first power switch and the second power switch is turned off.

The document feed table of the document feed / transport means and the transfer paper feed table of the transfer paper feed / transport means are both provided to be freely openable and closable in a paper feed section. Will be opened intentionally and inevitably. Such intentional and inevitable opening of the table turns on the first and second power switches, so that a separate and exclusive operation is not required for turning on the power, and
The power is not inadvertently turned on, and the operability is improved. Then, the heater preheating or the like can be released prior to the sheet setting on the table. When the table is not used after the recording, the first and second power switches are turned off by closing these tables in the closed storage state, so that forgetting to turn off the power is also prevented.

Embodiment An embodiment of the present invention will be described with reference to the drawings.

First, the overall schematic configuration and operation will be described with reference to FIGS. FIG. 1 is a cross-sectional structure diagram showing an outline of the process configuration, FIG. 2 is a perspective view showing the entire external appearance when not in use,
FIG. 3 is a perspective view showing the appearance of the copying processing standby state. As shown in FIG. 2 and the like, the copying machine of the present embodiment is configured as a vertical / thin copying machine mainly used by leaning along a wall.

As shown in FIG. 2, the copying machine according to the present embodiment has a document feed table 1 which also serves as an external cover serving as a main body case, a front cover 2, and a transfer paper feed table 3 as shown in FIG.
, Left and right side covers 4 and 5 and a back cover 6. A louver 7 is provided on each of the left and right side covers 4 and 5.

In order to shift from such an unused state to a copy processing standby state, first, the handle 8 provided on the upper outer surface side of the openable and closable document feeding table 1 is opened and rotated to the front side, and FIG. Open as shown in FIG. In this open state, the pair of side guides 9 on the inner surface side of the document feed table 1 are exposed and serve as guides for inserting a set of documents. A pair of side guides 9 approach each other
It can be separated and can be adjusted to the width of the original. A size mark 10 indicating a document size and a center position is attached to the innermost portion of the document feed table 1 as a guide for inserting a document. Further, as the document feed table 1 is opened and rotated, the sheet discharge rollers 11 located on the inner surface and the document discharge table 12 also serving as a document transport cover are exposed as shown in FIG.

On the other hand, when the outer surface of the transfer paper feed table 3 provided to be openable and closed is pressed, the lock means (described later) is released, and the transfer paper feed table 3 is linearly opened and rotated by the damper means (described later) provided at the fulcrum. As shown in FIG. 3, the sheet is opened and fixed at a predetermined sheet feedable position. The transfer paper feed table 3 is for loading and setting the transfer paper to be copied on the front surface thereof, and, like the document feed table 1, approaches and separates in conjunction with the paper size and guides the curl of the leading edge of the paper. A pair of side guides 13 is provided. A size mark 14 indicating a paper size and a center position is attached to a position on the front side of the transfer paper feed table 3 as a guide for inserting the transfer paper. Also, the transfer paper feed table 3
A friction pad 16 is provided at the center of the innermost part of the rim. Transfer paper feed table 3
Is opened, the inner cover 17 provided on the inner surface and covering the fixing portion and the like is exposed.

When the document feed table 1 and the transfer paper feed table 3 are opened in this way, the main power supply of the apparatus is activated, and the
Standby in seconds. The operation from the start to the end of copying will be described with reference to FIG.

As shown in FIG. 1, a photoconductor 20 in the form of an endless belt is provided as a basis of an electrostatic recording type copying machine. , The charging charger (charging means) 21, the exposure optical system 22,
Developing device (developing means) 23, transfer charger (transfer means)
24, a fixing device (fixing means) 25, a cleaning device 26, and each process unit of the static elimination LED array 27 are sequentially provided. A document feeding and conveying device (document feeding and conveying means) 28 is provided above the exposure position by the exposure optical system 22, and a transfer paper feeding and conveying device (transfer (Paper feeding and conveying means) 29 is provided. In the present embodiment, the photoconductor 20 is provided at a substantially central position in the case in a vertically elongated state in which the interval between the central portions in the belt is narrow.
Are arranged in order from top to bottom in a narrow state. A cooling fan 30 is also provided below the cleaning device 26.

First, when the document feed table 1 is opened and rotated, the opening is detected by a document feed table open / close switch 31 serving as a first power switch. When the transfer paper feed table 3 is pressed, the lock means is released, and when the transfer paper feed table 3 is opened semi-automatically by the damper means,
This opening is detected by a transfer paper feed table opening / closing switch 32 serving as a second power switch. By taking the AND of these open / close switches 31 and 32, the power of the apparatus is automatically turned on and warm-up is started. Therefore, the copying operation can be directly shifted to without needing the power switch and the power switch turning-on operation separately. At this time, the opening operation of the tables 1 and 3 is intentionally performed by the operator for the copy operation, and it is rare that the power is turned on carelessly. The user is informed by the display and the buzzer sound that the power is turned on and the copying is enabled. In addition, if the tables 1 and 3 are not sufficiently opened, no notification is made, and a setting mistake can be recognized. Here, the fixing heater 33, the fluorescent lamp heater 34 and the cooling fan 30 complete the warm-up after about 20 seconds.
In this state, the transfer paper of the same size as the original or the size to be copied is abutted and set on the transfer paper feed table 3 with the side guide 13 as a guide. Then, the paper presence / absence sensor 36 provided on the transfer paper feed table 3 is turned on, and a message that paper has been set is displayed on the display unit. As a result, the copying machine becomes ready to copy, and waits for the insertion setting of the document.

Then, the document is inserted and set on the document feeding table 1 with the document face down with the side guide 9 and the size mark 10 as guides, and abuts against the pair of document conveying rollers 37 and 38. Such a document insertion set is detected by a document presence / absence sensor 39 provided in front of the entrance roller 37. After this detection, the conveyance rollers 37 and 38 are driven after a certain pulse time, and the conveyance of the document is started. That is, the output of the document presence sensor 39 regulates the drive start time of the transport rollers 37 and 38, and the waiting time causes the leading edge of the document to follow the registration roller. That is, the skew correction time is secured. However, the leading edge of the document is limited to the one perpendicular to the transport direction.

The original conveyed by the conveying rollers 37 and 38 further includes:
The document is conveyed to the back over the contact glass 41 while being pressed by the internal document pressing plate 40. During this transport, the leading edge of the original is located below the contact glass 41.
Detected by 42. In order for the sensor 42 to detect the leading edge of the document, a round hole or notch is formed at a position of the document pressing plate 40 facing the sensor 42.

The exposure optical system 22 is provided downstream of the sensor 42. The exposure optical system 22 includes a fluorescent lamp 43 for exposing the original surface of the original conveyed on the contact glass 41 and a reflecting plate 44 for efficiently reflecting a part of the light of the fluorescent lamp 43 to the original surface.
And a rinse (imaging optical element) 45 for condensing and irradiating the light reflected from the document surface onto the photosensitive member 20.

On the other hand, the original inserted and transported by the transport rollers 37 and 38 is taken over by a pair of transport rollers 46 and 47 provided on the back side of the contact glass 41,
The document is discharged onto a document discharge table 12 by a discharge roller 11 via a reverse conveyance path 50 formed by the outer guide 8 and the outer guide 49. The outer guide 49 is formed by a part of the back cover 6 and also serves as an outer cover. These rollers 11,37,3
The document feeding and conveying device 28 is constituted by 8, 46, 47, the reverse conveying path 50, the tables 1 and 12, and the like.

In synchronization with the drive of the photoconductor 20 being started in conjunction with the drive motor by the document detection by the document presence sensor 39,
Transfer charger 24, static elimination LED array 27 and the fluorescent lamp 43
Is turned on. When the position of the photoconductor 20 corresponding to the position where the leading end of the document reaches the optical axis of the rinse 45 reaches the timing before the drive reaches the position of the charging charger 21, the charging charger 21 is turned on, and the surface of the photoconductor 20 is cleaned. Uniform charging, that is, a uniform potential is applied.

Then, the reflected light from the original is rinsed by the
An image is formed thereon to form an electrostatic latent image. The electrostatic latent image is developed by the developing device 23, and the visualized toner image is transferred onto transfer paper at the position of the transfer charger 24.
After the transfer, the toner remaining on the photoconductor 20 is scraped off by the blade 51 of the cleaning device 26. Further, the residual potential on the surface of the photoconductor 20 is removed by irradiating the charge eliminating LED array 27 with light.

Here, the photoreceptor 20 has a joint, and a reflection mark (not shown) provided on the surface end of the photoreceptor 20 and a lower portion of the developing device 23 so that an image is not formed over the joint position. The home position of the photoconductor 20 is detected by the joint sensor 53, and the belt is driven, that is, the drive motor is turned off.

On the other hand, the drive is transmitted to the clutch on the paper feed table side in conjunction with the drive motor by the detection signal of the document presence sensor 39, the paper feed solenoid is turned on by the detection signal of the document leading edge detection sensor 42, and the clutch shaft is The transfer paper stacked on the transfer paper feed table 3 is fed and conveyed by the paper feed roller 55 and the call roller 15 that are engaged. At this time, only the uppermost one of the stacked transfer papers is separated and conveyed by the friction pad 56 pressed against the paper feed roller 55. Further, the leading end guide 35 is also displaced downward to the lower retracted position at a timing interlocked with the descending sheet feeding operation of the call roller 15.

The transfer paper transported by the paper feed roller 55
It is made up of a guide 57 and an outer guide 58, passes through a reversing conveyance path 59, and moves toward the transfer position of the photoconductor 20 in a reversed state. Here, a registration roller 60 and a driven roller 61 are provided before the transfer position, and the transfer paper is temporarily stopped at these rollers 60 and 61, and the timing is adjusted so that the transfer paper coincides with the leading edge of the image on the photoconductor 20. Controlled. That is, the clutch engaged with the shaft of the registration roller 60 is interlocked with the drive motor similarly to the drive transmission of the above-described paper feed clutch, and is driven and transmitted to the registration roller 60 by the detection signal of the document leading edge detection sensor 42, Synchronization with the visual image is achieved. Further, a detection signal of the seam sensor 53 can be used as the registration start signal.
Further, a paper presence / absence detection sensor 62 for performing jam detection is provided at a position immediately before the registration roller 60.

The transfer paper conveyed at a predetermined timing by the registration roller 60 receives the transfer of the toner image on the photoconductor 20 by the transfer charger 24. Thereafter, the transfer paper is conveyed while being thermally fixed by the pair of the fixing roller 63 and the pressure roller 64 of the fixing device 25, guided by the peeling claw 65, and discharged out of the apparatus by the discharge roller 66. That is, the transfer paper feeding and conveying device of the present embodiment
The transfer paper transport path in 29 is the transfer paper feed table 3,
Recall roller 15, paper feed roller 55 and friction pad 56
Paper feed path of the paper feeding means, a reverse conveyance path 59, a registration roller 60 and a driven roller 61 pair, a transfer path by the transfer charger 24, a fixing roller 63 and a pressure roller 64 pair, and a paper discharge roller 66. Document feed path 28
As in the case of (1), the operation side (front side) is set to be the sheet insertion and sheet discharge side.

That is, the reversing conveyance paths 50 and 59 both reversely convey the paper in the clockwise direction in FIG. 1. The transfer direction of the original and the transfer sheet is made coincident with the photosensitive member movement direction at each operation position by performing the exposure and performing the transfer after the reversal on the transfer sheet feeding / conveying device 29 side. Therefore, all operations on the original and the transfer paper can be performed only on the operation side of the apparatus, and the operability is improved.

At this time, a paper ejection detection sensor 67 provided near the paper ejection roller 66
The jam signal is detected from the sensor 63 in the registration unit using the detection signal of the registration unit, and a signal is supplied to the joint sensor 53 by the OFF signal (at the time of passing the rear end) to detect a reflection mark on the photoconductor 20 and to control the drive motor. Turn off. The transfer charger 24, the static elimination LED array 27, and the fluorescent lamp 43 are synchronized with the drive motor being turned off.
Is turned off.

Further, the charging charger 21 is turned off at the corresponding position of the photoconductor 20 when the position where the document presence detection sensor 39 is turned off reaches the optical axis of the rinse 45. The paper feed solenoid is turned off in synchronization with turning on of the registration solenoid, and the registration solenoid is turned off in synchronization with turning off of the sheet ejection detection sensor 67.

As a result, the copy processing operation is completed, and the apparatus enters a standby state. Therefore, by closing the document feed table 1 and the transfer paper feed table 3 in the state shown in FIG. 2, the respective open / close switches 31 and 32 are turned off and the power is turned off. The fixing heater 33, the fluorescent lamp heater 34, and the cooling fan 30 are turned off.

Incidentally, the photoconductor 20 of this embodiment will be described with reference to FIG. The photoreceptor 20 in the form of an endless belt is supported in a vertically long state in an inverted triangular shape by a plurality of rollers positioned on the inner peripheral side, that is, a driving roller 70, a cleaning roller 71, and a transfer roller 72. The developing roller
By contacting the tension roller 74 and the tension roller 74 in a concave shape, the interval between the central portions in the belt is reduced. When the drive motor 75 is turned on, the drive roller 70
A drive gear (not shown) that engages with the document feeder rotates the photoconductor 20 at a constant speed with the document feed roller 37. Here, the drive roller 70 is made of a material having a large frictional resistance such as a rubber roller or a flocking roller, and is provided downstream of the image forming position of the rinse 45 with respect to the photoconductor 20, but provided at an upstream position of the developing roller 73. I have. By providing the drive roller 70 at such a position, the photoconductor 20 is always provided with a tension for imparting flatness to the image forming position, and the developing roller 73 side is a loose side, and the developing roller 73 and the photoconductor 20 The stress in the nip portion is relieved, and the followability of both is obtained.

The transfer roller 72 is disposed at a position downstream of the developing roller 73 and facing the transfer charger 24. Drive rollers located at approximately the same position on the same vertical line
70, the developing roller 73 and the transfer roller 72
The device is thinner because it is concave and the developing nip of the developing roller 73 is widely secured, and the inner developing roller 73 is cut into the empty space on the inner peripheral side of the photoconductor 20 as much as possible. Is done.

The cleaning roller 71 is disposed at the same height position as the drive roller 70, that is, at a position where the image forming portion of the photoconductor 20 is opposed to the drive roller 70 so as to be orthogonal to the image forming optical axis by the rinse 45. I have. The blade 51 faces the cleaning roller 71. The tension roller 74 is arranged so as to be depressed in a state where the photoconductor 20 is depressed at an intermediate outer peripheral position between the cleaning roller 71 and the transfer roller 72. In this way, the photoreceptor 20 is provided in a vertically elongated state, and is provided in a narrow state in which the central portion is as concave as possible.

Here, the position of the tension roller 74 is downstream of the transfer position and upstream of the charging position, and does not affect the latent image and the visible image on the photoconductor 20. It may be. The transfer roller 72 has a smooth surface and low friction.

Next, the document feeder 28 will be described with reference to FIGS. Document feeder 28 is a photoconductor
It is located at the top, above 20. First, when the document feeding table 1 whose outer surface also serves as the outer cover is manually pushed, the lock 90 provided inside is released. When the grip 8 is gripped and lifted, the relay fulcrum 91, the rotation fulcrum 92, the arm
The document feed table 1 is pivotally displaced through 93, and the document feed table 1 is guided to the set open position.

As shown in FIG. 6, a pair of side guides 9 provided on the document feeding table 1 are respectively connected to rack gears 94 and 95 disposed therein, and these rack gears 94 are located at the center. , 95 and the pinion gear 96 meshing with
When one side guide 9 is moved, the other side guide 9 is also moved in the opposite direction by the same amount.

Inside, transport rollers 37 and 46 rotatably supported by a main body side plate 85 via bearings are provided at front and rear positions of the contact glass 41. These transport rollers 37, 46
The driven rollers 38 and 47 which are driven and rotated are provided on the upper part of the roller. Document holding plate 40 located on contact glass 41
Is rotatably supported by the bearing of the driven roller 47 and is provided so as to be positioned on the contact glass 41 by its own weight. The lower surface of the document pressing surface 40 is white and is made of a low friction material.

The outer guide 49 is formed as a guide fin by a rib of the rear cover 6 of the main body. Further, an inner guide 48 is provided which guides the document conveyed by the pair of rollers 46 and 47 at a certain interval with respect to the outer guide 49 to the sheet discharging side. The original conveyed by the guides 48 and 49 through the reverse conveyance path 50 is fed to the paper discharge roller 11 attached to the document feeder 28 and the paper discharge roller attached to the rear cover 6 of the main body. It is discharged by a plurality of driven rollers 97 that are in pressure contact with 11.

As described above, the document transport / eject path is simplified and shortened.When copying the largest copy document, a trouble occurs during the transport of the transfer paper after the registration position, jam detection occurs, and the drive motor 75 operates. Even if the document is stopped, the document is completely discharged, so that maintenance of the document at the time of the transfer paper jam becomes unnecessary. If a jam occurs during the feeding of the transfer sheet before the registration position of the transfer sheet, the document is present in the document feeding and conveying device 28 because the document is being conveyed. The document discharge table 12 is rotated about a hinge 98, and the document holding plate 40 is also lifted around the driven roller 47 axis with its handle to open the contact glass 41 or the outer guide 49. The document is exposed and the document can be removed. Further, cleaning on the contact glass 41 is also possible.

FIG. 7 shows an arrangement of an open / close switch 31 which is turned on by opening the document feeding table 1 and turned off by closing the document feeding table 1. This open / close switch 31
Is attached to the side plate 99 of the document feeder 28.

Further, the sheet feeding section of the transfer sheet feeding / conveying device 29 will be described with reference to FIGS. Transfer paper feeder
29 is provided immediately below the photoconductor 20. First,
The transfer paper feed table 3 is supported by unit side plates 100 on both sides via a support shaft 101 so as to be rotatable and openable. At this time, a sector gear 102 is provided on the support shaft 101 and meshes with an oil damper gear 103 fixedly supported on the unit side plate 100 to form a gear damper. Further, a lock member 104 is provided on the unit side plate 100, and is configured so that hooks 105 formed on both sides of the transfer paper feeding table 3 can be locked or unlocked and released by engaging and disengaging hooks 105. ing. That is, when the outer surface of the closed transfer paper feed table 3 is manually pushed, the hook 105 is disengaged from the lock member 104 to unlock the transfer paper feed table 3, and the transfer paper feed table 3 is rotated about the support shaft 101, and When the sector gear 102 and the oil damper gear 103 mesh with each other, they are linearly and semi-automatically opened. Transfer paper feed table 3
In the closed state, as shown in FIG. 11 (a), the open / close switch 32 turned off by the escape portion 106a formed by cutting out the front end of the transfer paper feeding table 3 opens the transfer paper feeding table 3. As a result, as shown in FIG. 11 (b), it is turned on by the convex portion 106b formed continuously with the escape portion 106a at the end. When the open / close switch 32 is turned on, the power of the main body is turned on by AND operation with the ON of the open / close switch 31 to be in a warm-up state. The transfer paper feed table 3 is positioned in an open state when a cushion member 107 attached to a part of the leading end of the transfer paper feed table 3 comes into contact with a stopper 108 provided on the main body side.

Here, in the opened transfer paper feed table 3, similarly to the case of the original feed table 1, the pair of side guides 13 are interlocked in the width direction by the combination of the rack gears 109 and 110 and the pinion gear 111. It is configured to move. A friction pad 16 provided at the center of the innermost portion of the transfer sheet feed table 3 is paired with the call roller 15 to reliably feed the stacked transfer sheet to the last sheet.

In the separation feeding operation, first, the front fence 35 is tilted forward, and the call roller 15 contacts the transfer paper on the transfer paper feed table 3. The rotation of the call roller 15 is transmitted to the transfer sheet, and only one sheet is fed from the transfer sheet feed table 3 by the friction pad 16. The fed transfer paper is continuously transported by the paper feed roller 55, while the call roller 15 is separated from the transfer paper by the cam mechanism,
In addition, the front fence 35 also rises, and the next transfer paper is prevented from being sent out. Then, the sheet feeding solenoid is turned off in a state where a certain amount of slack is given by the detection of the registration sensor 62, and the apparatus stands by to synchronize with the visible image on the photoconductor 20.

When not in use, the hook 105 is engaged with the lock member 104 and locked in a closed state by manually lifting the transfer paper feed table 3 and rotating it in the closing direction. The open / close switch 32 is shown in FIG.
The power is turned off and the power is turned off as shown in FIG.

Further, the electrical parts and the circuit configuration thereof will be described with reference to FIG. First, the open / close switches 31, 32 are connected in series to the AC line to the AC power supply 120 via an interlock switch 121 for safety when the apparatus body is opened in the event of a jam of transfer paper, a document, etc., and a noise filter 122. The power switch circuit 123 has an AND circuit configuration. Therefore, the power is turned on only when both of the open / close switches 31 and 32 are turned on. Further, a triac 124, a thermostat 125 provided for the fixing roller 63, a fixing heater 33, a drive motor 75, and two cooling fans 30 are connected at a later stage. A power pack 128 for the transfer charger 24 is connected to a DC line of a DC power supply 127 connected to an AC line via a power transformer 126. The DC 22 V line is output to the total counter 130, the sheet feeding solenoid 131, and the registration solenoid 132 via the relay board 129. The relay board 129 receives the output from the main PC board 133 and controls the output of the fluorescent lamp 43 and the fluorescent lamp stabilizer 134, the power pack 135, the static elimination LED array 27, and the fluorescent lamp heater 34 connected to the 22V line. . The power pack 135 supplies power to the charging charger 21 via a varistor 136. The thermistor 137 provided for the paper feed sensor 36, the paper discharge sensor 67, and the fixing roller 63 is connected to the DC 5V line via the relay board 129. Also, 22V
Automatic dimming sensor 1 from main PC board 133
38, output control for the collected toner sensor 139, the joint sensor 53, the pulse generator 140, and the toner end sensor 151 is performed. Further, a display 142 and a buzzer 143 for notifying a power-on / set completion state when the open / close switches 31, 32 are turned on are also connected to the main PC board 133.

FIG. 13 is a timing chart showing the operation timing of each unit for the operation described above. Open / close switch 3
The state where the power is turned on by turning on the switches 1 and 32 and the warm-up of the fluorescent lamp heater 34 and the like is started is shown.

An opening / closing switch provided on the transfer paper feeding / conveying device 29 side.
As shown in FIG. 14, 150 may be mounted on the side plate 100 and turned on / off by the transfer paper feed table 3 as in the case of the open / close switch 31 (FIG. 7). .

According to the present invention, as described above, the first power supply that is turned on by opening the document feed table and the transfer paper feed table that are provided to be openable and closable in the document feed / transport means and the transfer paper feed / transport means, respectively. A switch and a second power switch are provided, and when both the first power switch and the second power switch are turned on, the power is turned on, and one of the first power switch and the second power switch is turned off. The power supply is turned off by performing this operation, so that only the operation of intentionally and inevitably opening the table to set the original and the transfer paper during recording is performed, and the first and second power switches are turned on. Since the power is turned on, a separate and exclusive operation is not required to turn on the power, and the power is not turned on carelessly. The heater can be preheated before the paper is set on the table, and when not in use after recording, simply close these tables in the closed storage state and the first and second power switches are turned off. Therefore, forgetting to turn off the power can be prevented.

[Brief description of the drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a schematic side view of the whole, FIG. 2 is an external perspective view when not in use, FIG. 3 is an external perspective view in a usable state, and FIG. FIG. 5 is a schematic side view mainly showing a body, FIG.
FIG. 6 is a plan view of a document conveying table portion, FIG. 7 is a schematic perspective view of a part thereof in an open state, FIG. Fig. 10 is a plan view of the vicinity of the paper feed table, Fig. 10 is a schematic perspective view of a partially opened state, Fig. 11 is a schematic side view showing the on / off operation of an open / close switch, and Fig. 12 is an electrical component and its components. FIG. 13 is a block diagram showing a circuit configuration, FIG. 13 is a timing chart, and FIG. 14 is a schematic perspective view showing a modification. 1. Original document feed table, 3 ... Transfer paper feed table,
20 photoconductor 21 charging means 22 exposure optical system 23
... developing means, 24 ... transferring means, 25 ... fixing means, 28 ...
… Document feeding and conveying means, 29… Transfer paper feeding and conveying means, 31…
... 1st power switch, 32 ... 2nd power switch

Continuation of the front page (56) References JP-A-3-55565 (JP, A) JP-A-3-56975 (JP, A) JP-A-3-62045 (JP, A) JP-A-63-155157 (JP) JP-A-64-91146 (JP, A) JP-A-62-17760 (JP, A) JP-A-63-39239 (JP, U) JP-A-56-156037 (JP, U) JP-A 62-201753 (JP, U) Japanese Utility Model Showa 60-115250 (JP, U) Utility Model Registration 2502609 (JP, Y2) Utility Model Registration 2505713 (JP, Y2) Utility Model 8-2675 (JP, Y2) (58) ) Field surveyed (Int.Cl. ⁶ , DB name) G03G 15/00 550 G03G 21/16-21/18 G03G 21/00 350-352 G03G 21/00 370-540

Claims (1)

(57) [Claims] 1. An endless belt-like photosensitive member surface is uniformly charged by a charging means, and a document fed and conveyed by a document feeding / conveying means is exposed by an exposure optical system. An electrostatic latent image is formed thereon, the electrostatic latent image is visualized by developing means, and the visualized image is transferred by transfer means onto transfer paper fed and transported by transfer paper feed transport means. In an electrostatic recording apparatus in which an image transferred to a transfer sheet is fixed by a fixing unit, the charging unit, a document feeding and conveying unit, an exposure optical system, the developing unit, and the transfer unit are provided around the photoreceptor. Means, a fixing unit, and a transfer paper feeding / conveying means are disposed in a main body case, and a document feeding table is provided in a document feeding section of the document feeding / transporting means so as to be openable and closable. With the transfer paper A transfer paper feeding table is provided in the transfer paper feeding section of the stage so as to be openable and closable, and a first power switch which is turned on when the document feeding table is opened to the paper feeding position, and a paper feeding position of the transfer paper feeding table. Turn on by opening the second
A power switch is provided, and the power is turned on by turning on both the first power switch and the second power switch, and the power is turned on by turning off one of the first power switch and the second power switch. The electrostatic recording device is characterized in that the recording is interrupted.