JPH0764449B2 - Table for electronic copying machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an electronic copying apparatus table on which an electronic copying apparatus including an electronic copying machine and peripheral devices thereof is mounted.

2. Description of the Related Art As a table for an electronic copying apparatus, there is known a table in which the electronic copying apparatus is only placed on a substantially horizontal upper surface.

However, this electronic copying apparatus table must be arranged outside the electronic copying apparatus table when the electronic copying apparatus is a peripheral apparatus in which a sheet feeding apparatus is detachably attached. It has the drawback of not becoming.

Object An object of the present invention is to provide a table for an electronic copying apparatus in which most of the paper feeding apparatus can be housed inside when the electronic copying apparatus is detachably attached with a paper feeding apparatus which is a peripheral machine. To provide.

Configuration The present invention relates to a mounting portion on which an electronic copying apparatus is mounted, a bottom plate laterally extending from the bottom of the mounting portion, and a front end of the bottom plate when the surface on the side where the electronic copying apparatus is operated is the front surface. A door supporting member fixed to the mounting portion and / or the bottom plate, the door supported by the door supporting member so as to be openable and closable, and for forming a storage chamber together with the door on the upper part of the bottom plate, A large cover that has an upper surface, a side surface, and a rear surface that are substantially the same height as the mounting portion and has an opening that extends from the upper surface to the upper portion of the side surface. And a small cover which is detachably provided.

Next, specific examples of the configuration of the present invention will be described in detail with reference to the drawings.

In FIG. 1, reference numeral 1 indicates a table as a mounting portion on which the electronic copying apparatus is mounted. This table 1 is 1
It consists of a box-shaped stand with two open sides. Inside the table 1, a plurality of shelves are provided at predetermined intervals in the vertical direction, and the table 1 is placed on these shelves.
The cassette 2 or the like for accommodating copy paper can be arranged from the opening of the.

A bottom plate 1a extends substantially horizontally from the bottom of the table 1 to the side. A door support member 1b is arranged at the front end of the bottom plate 1a. The door support member 1b is formed in a substantially U shape and is fixed to the side end portion of the table 1. The door support member 1b may be fixed to the bottom plate 1a. Alternatively,
It may be fixed to both the table 1 and the bottom plate 1a. The door 1c is supported by the door support member 1b so as to be openable and closable via a hinge member 1d.

A storage chamber is formed in the upper part of the bottom plate 1a by a large cover 1e having an upper surface, side surfaces, and a rear surface that are substantially the same height as the table 1. The large cover 1e is detachably attached to the bottom plate 1a and the table 1. The large cover 1e is formed with a hole 1f that is open from the upper surface to the upper portions of the side surfaces. A small cover 1g for closing the hole 1f is detachably provided in the hole 1f.

As shown in FIG. 2, the small cover 1g is connected to the hole of the large cover 1e.
When removed from the 1f section, a tray containing copy paper can be mounted in the hole 1f section.

As shown in FIG. 3, when the large cover 1e is removed from the table 1 and the bottom plate 1a, it has a cassette or tray for storing copy paper and a paper feed device for feeding the copy paper from now on. The paper bank being mounted can be placed on the bottom plate 1a. Next, the electronic copying apparatus to be placed on the electronic copying apparatus table will be described in detail with reference to the drawings.

This electronic copying machine is composed of an electronic copying machine and a peripheral machine. Among them, the electronic copying machine includes an optical system, a drum peripheral machine, a developing device, a cleaning device, a paper feeding device, a separation / conveying device, a fixing device and a control device. It is composed of devices and the like.

FIG. 4 shows an outline of the above-mentioned electronic copying apparatus. A contact glass 4 on which an original is placed is stretched on the upper surface of the copying machine main body 3.
The surface of the original placed above is exposed. An optical system 5 is arranged in the main body 3 of the copying machine below the contact glass 4 so that the light, which has exposed the surface of the original, reaches the photosensitive drum 6. An unillustrated pressure plate or document feeder is selectively attached to the upper surface of the copying machine body 3.

The details of the optical system 5 are shown in FIG. 5, and the exposure lamp 8 surrounded by the reflector 7 has the contact glass 4 together with the first mirror 9 provided on the side of the reflector 7.
Is movably arranged over the entire area in the longitudinal direction. Further, a mirror carriage 10 is movably arranged over a range of approximately half of the contact glass 4 in the longitudinal direction, and the second carriage 11 receives the light from the first mirror 9 on the mirror carriage 10. And the third mirror 12 that receives and reflects the light from the second mirror 11 are arranged so as to be orthogonal to each other. Further, a zoom lens 13 and a fourth mirror 14 are arranged on the optical path from the third mirror 12, and the light from the third mirror 12 is condensed by the zoom lens 13 and then the fourth mirror 14 is used. It is designed to reflect. The light reflected by the fourth mirror 14 is dust-proof glass 15.
The photoconductor drum 6 is irradiated with the light through.

The zoom lens 13 is moved by wire drive,
It is possible to obtain a scaling factor of 1% in the range of up to 2.0 times. Further, the optical system 5 is provided with an automatic density control device (not shown), which detects the density of the background of the document at the leading edge 50 mm of the document and controls the bias voltage to control the density of the copy. .

Returning to FIG. 4, around the photosensitive drum 6, a charging charger 16 that uniformly applies a charge of a predetermined polarity to the photosensitive drum 6 by corona discharge, and the photosensitive member charged by the charging charger 16. Eraser 17 for erasing unnecessary electric charges on the drum 6 to prevent toner from adhering to the untransferred portion, and developing for adhering toner to the electrostatic latent image on the photosensitive drum 6. The device 18, a photo sensor 20 for controlling the toner density by detecting the density of the toner image of the pattern 19 arranged on the end portion of the contact glass 4 from the photosensitive drum 6, the photosensitive drum 6 and the toner. A pre-transfer charge eliminating lamp 21 for reducing the adhesion and facilitating the separation of toner images, a transfer charger 22 for transferring the toner image on the photoconductor drum 6 to a copy sheet, and a copy sheet on which the toner image is transferred. Sensitize A separation charger 23 for separating from the body drum 6, a cleaning device 24 for removing the residual toner on the photoconductor drum 6, and a discharge lamp 25 for erasing the residual charge on the photoconductor drum 6 are provided. They are arranged in this order.

A cooling fan 26 is provided at the end of the optical system 5, and a ventilation passage 27 for guiding the ventilation from the fan 26 to the photoconductor drum 6 between the static elimination lamp 25 and the charger 16.
Is formed, and the air blown from the fan 26 is guided to the photoconductor drum 6 to scatter the ions and ozone around the photoconductor drum 6.

Further, the planar heater 28 is disposed below the photoconductor drum 6 so as to face the photoconductor drum 6. Therefore, it is not necessary to incorporate a heater in the photoconductor drum 6, and therefore the photoconductor drum 6 is not required. The 6 axes can be driven directly.

The developing device 18 has a resin-molded casing 29 in order to reduce the weight and cost, and the casing 29 is detachable from the copying machine main body 3. Inside the casing 29, a developing sleeve 30 facing the photosensitive drum 6 and a stirring roller 31 for stirring the toner and the developer and supplying them to the developing sleeve 30 are arranged. The casing 29 above the developing sleeve 30 has the developing sleeve 30
The doctor sleeve 32 close to the
The excess developer adhering to is scraped off to a constant height. Above the stirring roller 31, a conveying screw 33 that conveys the toner and the developer in the axial direction of the photosensitive drum 6 to perform lateral stirring, and the conveying screw 33.
And a separator 34 that performs lateral stirring in the opposite direction. Further, a cartridge 35 filled with toner is detachably attached to the end portion of the casing 29, and the toner in the cartridge 35 is a signal whose toner concentration is reduced by the photo sensor 20. When the toner is discharged, the supply roller 36 supplies the toner to the vicinity of the stirring roller 31 via the toner feeding plate 37. It should be noted that the toner from the cartridge 35 is supplied over a narrow range of approximately A4 width, so that the toner is prevented from being scattered around. Thus, even if the toner is supplied in a narrow range, the toner is laterally agitated by the transport screw 33 and the separator 34, so that the length of copy paper of various sizes can be accommodated.

As described above, the reason why the toner is filled in the cartridge 35 is to facilitate the toner conversion.

Further, the reason why the casing 29 of the developing device 18 can be changed is that development can be selectively performed with toner of a plurality of colors.

As shown in detail in FIG. 6, the cleaning device 24 has a resin-molded thin casing 38, in which the central position of the photosensitive drum 6 in the axial direction is rotatable. A blade 39, which is supported and has equalized left and right pressures on the photosensitive drum 6, is arranged so as to face the photosensitive drum 6. The blade 39 scrapes off the toner paper powder and the like adhering to the photosensitive drum 6 by its edge surface. Further, a fur brush 40 facing the photoconductor drum 6 is provided in the casing 38 on the upstream side in the rotation direction of the photoconductor drum 6, and removes not only toner but also paper dust or the like that is difficult to be scraped off by the blade 39. It is supposed to do. Further, a toner collecting coil 41 is arranged in the casing 38 at the back of the fur brush 40, and the toner collected in the casing 38 is conveyed to an external toner bottle 42 (FIG. 1). Has become. The toner in the toner bottle 42 is discarded because the toner of a different color is mixed in the casing 38 due to color development and cannot be reused.
A pre-cleaning charge 43 is provided on the upstream side of the fur brush 40.

Returning to FIG. 4, the paper feeding device is configured so that two cassettes 44A and 44B capable of accommodating a large number of copy papers can be mounted in the vertical direction. A pair of paper feed rollers 45A and friction pad 46A, and paper feed roller 45B and friction pad 46B are arranged at intervals in the vertical direction. Also, each installed cassette
Tray raising arms 47A and 47B are provided at positions facing the bottom surfaces of the 44A and 44B so as to rotate counterclockwise by a motor (not shown) and push up the copy paper in the cassettes 44A and 44B. The topmost copy paper pushed up is pressed against the paper feed rollers 45A and 45B.

A paper feed passage 48A is disposed downstream of the upper paper feed roller 45A and the friction pad 46A, and a lower paper feed roller 4A is provided.
5B and the friction pad 46B are provided with other sheet feeding passages 48B on the downstream side, and these sheet feeding passages 48A and 48B join together on the way to reach the transfer portion 50 of the photoconductor drum 6. It is said that. In the paper feed path 49, registration rollers 51, 51 for aligning the timing of the toner image on the photosensitive drum 6 with the copy paper are provided. Further, the guide plates 52, 52, ... Forming the respective paper feed passages 48A, 48B, 49 are made of resin in order to reduce the weight. Further, a manual feed table 53 is flexibly attached to the side surface of the copying machine main body 3 above the portion where the upper cassette 44A is mounted, and in a stretched state, it is special between the paper feed roller 45A and the friction pad 46A. You can insert a copy paper. A relay guide plate 54a for introducing copy paper from below the copying machine body 3 is provided in the paper feed passage 49.
The paper feed path 54 consisting of
Relay rollers 55, 55 are arranged in the.

The angle of the paper feed path 49 with respect to the surface of the photoconductor drum 6 is set to be small with respect to the tangential direction of the photoconductor drum 6, so that the adhesion of copy paper to the photoconductor drum 6 is good. It is tight.

The separation / conveyance device includes a transfer charger 22 and a separation charger 23, which are located around the photosensitive drum 6 as described above.
And a separation claw 56 for physically separating the copy paper from the photosensitive drum 6. These transcription chargers 22
In addition, the separation charger 23 swings to rotate the photosensitive drum 6
The distance between and is large so that copy paper can be easily taken out. The separation claw 56 is fixed unlike the conventional swing arrangement, which contributes to cost reduction.

On the downstream side of the support member 57 disposed below the photosensitive drum 6, a single conveyor belt 59 wound between a pair of pulleys 58, 58 is disposed to transfer the toner image. The fixed copy paper is conveyed horizontally. A large number of small holes (not shown) are formed in the conveyor belt 59, and a suction fan 60 is arranged below the conveyor belt 59. Therefore, the air on the conveyor belt 59 is driven by the suction fan 60 through the small holes to convey the conveyor belt 59.
Will be sucked downward, and as a result, the copy paper will be sucked onto the conveyance belt 59 and conveyed.

The fixing device 61 has a fixing roller 62 and a pressure roller 63 which are arranged on the downstream side of the conveyor belt 59 and rotate in mutually opposite directions to pass the copy paper therebetween. Of these, the fixing roller 62 has a heater 64 inside to be heated, and the pressure roller 63 located below the fixing roller 62 is spring-biased by its support shaft 65. The lever 66 presses from below, and as a result, the peripheral surface of the pressure roller 63 presses against the peripheral surface between the fixing rollers 62. An oil sump 67 is arranged beside the fixing roller 62, and an oil coating felt 68, a part of which contacts the fixing roller 62, is arranged above the oil sump 67. The silicone oil in 67 is supplied to the oil application felt 68 via the oil pumping felt 69 and applied to the peripheral surface of the fixing roller 62. Also,
A scraping blade 70 for scraping off excess silicon oil supplied to the peripheral surface of the fixing roller 62 and returning it to the oil sump 67 is arranged on the peripheral surface of the fixing roller 62.

The silicon oil transferred to the pressure roller 63 is returned to the inside of the oil tank 71 by the oil recovery felt 72 that contacts the lower end of the pressure roller 63.

The oil supply from the oil tank 71 to the oil sump 67 is performed via an oil supply pipe 73 as shown in FIG. 7, and a sleeve 74 made of a flexible material is provided at an intermediate position of the oil supply pipe 73. In the sleeve 74, a pair of check valves (not shown) that allow passage of the silicone oil only from the oil tank 71 toward the oil sump 67 are arranged. A flat plate-shaped fixed plate 75 is in contact with the peripheral surface of the sleeve 74, and a plate-shaped actuator 76 that holds the sleeve 74 together with the fixed plate 75 is arranged. The actuator 76 is arranged so that the middle portion thereof is swingably supported by a support shaft 77 fixed to the oil supply pipe 73 and connected to the fixed plate 75, and the other end of the actuator 76 is A cam gear 79 meshing with a gear 78 fitted to a fixing knob shaft 77 for rotating the fixing roller 62 is pivotally mounted. Therefore, the fixing knob shaft
The rotation of 77 causes the actuator 76 to come into contact with and separate from the fixed plate 75, so that the silicone oil in the oil tank 71 is pumped up and supplied to the oil sump 67. In the oil sump 67, an overflow passage 80 for returning the overflowed silicon oil into the oil tank 71 is formed.

Further, in the oil tank 71, an oil end detection mechanism 81 including a photo sensor or the like for detecting a deficiency of silicon oil in the oil tank 71 is arranged. This oil end detection mechanism 81 detects the lack of oil by utilizing the refractive index of the oil, and when the oil in the oil tank 71 becomes insufficient, for example, a print button (not shown) becomes immovable. It's designed to be vulnerable.

Returning to FIG. 4, a thermistor is provided near the fixing roller 62.
82 is provided, and the fixing roller 62 by the heater 64 is provided.
The temperature of the peripheral surface is controlled. Further, the fixing roller 62 is made thin so that the heat of the heater 64 can be easily transmitted to the peripheral surface of the fixing roller 62.

The driving of the optical system 5 described above is performed by a servo motor (not shown), and the movable members other than the optical system 5 are driven by one main motor 83 through one chain. Has become.

The control device is provided with a separate option control in order to reduce the cost of the main body, and is also adapted to digitize the exposure fixing system to serve also as an operation unit control.
Further, there is provided an auto-zoom device which automatically calculates the magnification ratio when the sizes of the original and the copy paper are respectively input, and makes a copy at the magnification ratio. In addition,
In such an auto-zoom apparatus, it is necessary to consider the situation when the size of the original and copy paper exceeds the limit variable magnification, but in this case, copying may be performed at the limit variable magnification. Alternatively, an alarm may be issued. A DC power source 84 is arranged below the fixing device 61.

Various peripheral machines can be detachably attached to the copying machine main body 3.

First, a double-sided copy paper feeding device 85 shown in FIG. 4 is detachably mounted below the copying machine main body 3. The double-sided copy paper feeding device 85 includes a casing 86 located below the copying machine body 3 and an upright casing 87 that stands upright from the casing 86 and that is adjacent to the copying machine body 3 on the back side of the fixing device 61. Have

In the upright casing 87, there is formed a passage 89 opposed to a sheet feeding passage 88 formed of a guide plate 88a arranged on the downstream side of the fixing device 61 in the copying machine main body 3.
89 is branched into a paper discharge passage 90 formed of a guide plate 90a reaching a tray or a sorter (not shown) and a reversing passage 91 formed of a guide plate 91a. A separation claw member 92 for selectively guiding the copy paper from the fixing device 61 to either the paper discharge passage 90 or the reverse passage 91 is provided at the branch portion of the paper discharge passage 90 and the reverse passage 91. It is arranged so that its rotation can be controlled by a solenoid (not shown).

A pair of paper discharge rollers 93, 93 are provided at the downstream end of the paper discharge passage 90 extending in a substantially horizontal direction, and a pair of paper discharge rollers 93, 93 are provided at the downstream end of the reversing passage 91 extending obliquely downward. Paper roller 94,94
Is provided. Casing below the inversion passage 91
An intermediate tray 95, a part of which protrudes to the outside, is arranged in 86, and the copy paper from the reversing passage 91 is landed on the intermediate tray 95. The landing direction of the copy paper on the intermediate tray 95 is such that the left side in FIG. 4 is the leading end side of the copy paper in order to reverse the copy paper.

On the intermediate tray 95, a roller 97 for regulating the trailing edge of the copy paper landed on the intermediate tray 95 to the right side on a rotation support plate 96 located on the right side of the intermediate tray 95.
It is provided so that it can swing. Also, the intermediate tray 95
On the right side of the sheet feeding path 99, which is formed of a horizontal guide plate 99a separated from the intermediate tray 95, is formed.
A paper feed roller 100 and a friction pad 101 are arranged at the upstream end of the paper feed passage 99. Further, the rotation support plate 96 disposed between the intermediate tray 95 and the paper feed path 99 is configured such that all copy sheets to be reversed are in the intermediate tray.
After being placed on the rotation supporting plate 96 and the rotation supporting plate 96, they are rotated and raised, and the uppermost copy paper is brought into pressure contact with the paper feed roller 100. A plurality of pairs of paper feed rollers 102, 102 ... Are arranged in the paper feed passage 99.

A paper feed passage 103 composed of vertical relay guide plates 103a and 103b positioned on a downward extension of the paper feed passage 54 of the copying machine main body 3 is provided above and inside the casing 86. , The copy paper in the intermediate tray 95 is a paper feed passage.
It is adapted to be retransmitted in the direction of the transfer portion 50 of the photosensitive drum 6 via 99, 103 and 54.

Inside the casing 86, a paper feeding device for feeding copy paper from a cassette 44C capable of storing a large number of copy papers is mounted. The paper feed roller 45C and the friction pad 46C allow the copy paper to be fed from the cassette 44C. Below this cassette 44C, the tray raising arm 47C
Are arranged. A paper feed passage 104 including a guide plate 104a for allowing the copy paper from the cassette 44C to reach the paper feed passage 103 is provided.

A paper feed passage 105 composed of a relay guide plate 105a is disposed inside the casing 86 so as to be located on the downward extension of the paper feed passage 103. The paper feed passage 105 has a pair of middle rollers. 106 are provided.

FIG. 8 shows an embodiment in which various peripheral machines are detachably attached to the copying machine main body 3.

In the example shown in FIG. 8 (A), the copying machine main body 3 is placed on the table 1 through the casing 86 of the double-sided copy feeding device 85, and the casing 86 is equipped with the paper feeding device having the cassette 44C. In addition, the automatic document feeder 107 and the sorter 108 are mounted.

In the example shown in FIG. 8 (B), the thin table 110 is provided on the table 1 and the paper bank 109 arranged adjacent to the table 1.
The copying machine main body 3 is placed via the paper feeding device having the cassette 44C mounted on the thin table 110, and the paper bank 109
Attach the paper feed device with two cassettes 44D and 44E to
Further, a pressure plate 111 for pressing the original document and a paper discharge tray 112 for discharging the copy paper are mounted.

In the example shown in FIG. 8C, the copying machine main body 3 is placed on the table 1 via the thin table 110, and the thin table 110 is used.
And a tray 11 for accommodating copy paper on the top of the table 1
A sheet feeding device having 3 is attached, and a pressure plate 111 and a sheet ejection tray 112 are attached.

In the example shown in FIG. 8 (D), the copying machine main body 3 is placed on the table 1 and the paper bank 109 via the casing 86 of the double-sided copy paper feeding device 85, and the cassette 86 is placed in the casing 86.
A paper feeding device having 44C is mounted, a paper feeding device having a cassette 44D for storing copy paper and a tray 113 is mounted in a paper bank 109, and an automatic document feeder 107 and a sorter 108 are mounted. is there.

The paper feeding device for feeding the copy papers stored in the cassettes 44D and 44E and the tray 113 are the cassettes 44A and 44B,
It has almost the same configuration as the paper feeding device that feeds the copy paper stored in the 44C, and the copy paper of the lower paper feeding device passes through the paper feeding path of the upper paper feeding device to the registration roller 51. Be delivered.

The sheet feeding device mounted in the paper bank 109 and the sheet feeding relay means related thereto in the example shown in FIG. 8D will be described in detail with reference to FIG.

A cassette 44D capable of accommodating a large number of copy sheets and a tray 113 are detachably attached to the paper bank 109. A paper feed roller 114 is arranged on the front portion of the cassette 44D. A friction pad 115 is elastically pressed against the lower portion of the paper feed roller 114.

A cassette 44 is provided between the paper feed roller 115 and the paper feed passage 105.
A paper feed passage 116 including a guide plate 116a for allowing the copy paper from D to reach the paper feed passage 105 is provided. The copy paper sent from the cassette 44D by the paper feed roller 114 is fed to the transfer unit 50 via the paper feed passages 116, 105, 103, 54, 49.

On the front part of the tray 113, there is arranged a calling roller 117 for sending out the copy paper contained in the tray 113. A paper feed roller 118 is arranged on the paper feed direction side of the calling roller 117, and a friction pad 119 is elastically pressed against the lower portion of the paper feed roller 118. The calling roller 117
A sheet feeding passage 120 formed of a guide plate 120a and a sheet feeding passage 121 formed of a guide plate 121a are arranged between the sheet feeding passage 105 and the sheet feeding passage 105, and a pair of relay rollers 122 are provided in the sheet feeding passage 120. It is arranged. The copy paper sent out from the tray 113 by the calling roller 117 is a paper feed path 121, 120, 105, 103, 54, 4
It is fed to the transfer unit 50 via 9.

As shown in FIG. 1, a large cover 1e is attached to the table 1 and the bottom plate 1a, and a small cover 1g is installed in the hole 1f of the large cover 1e. The mounted example is shown in FIG. 8 (A).

As shown in FIG. 2, the large cover 1e is attached to the table 1 and the bottom plate 1a, and the small cover 1g is removed from the hole 1f of the large cover 1e. FIG. 8C shows an example in which the tray is mounted, and the tray 113 is attached to the hole 1f of the large cover 1e.

As shown in FIG. 3, an embodiment in which an electronic copying apparatus is mounted on the table 1 in a state where the large cover 1e is removed from the table 1 and the bottom plate 1a is shown in FIGS. 8 (B) and 8 (D). The paper bank 109 having the cassettes 44D, 44E or the cassette 44D and the tray 113 and containing the paper feeding device for feeding the copy paper from them is placed on the bottom plate 1a.

Effect The electronic copying apparatus table of the present invention can accommodate most of the sheet feeding apparatus inside when the sheet feeding apparatus which is a peripheral machine is detachably attached to the electronic copying apparatus.

[Brief description of drawings]

FIG. 1 is a perspective view showing a table for an electronic copying apparatus of the present invention, FIG. 2 is a perspective view showing a state in which the small cover of the table for the electronic copying apparatus is removed, and FIG. FIG. 4 is a perspective view showing a state in which the large cover is removed, FIG. 4 is a schematic view showing an electronic copying apparatus placed on the electronic copying apparatus table in the same as above, and FIG. 5 is a front view showing an optical system of the electronic copying apparatus in the same above. FIG. 6 is a partially cutaway front view showing the cleaning device of the same electronic copying apparatus, FIG. 7 is a partially cutaway perspective view showing the fixing device of the same electronic copying apparatus, and FIGS.
(D) is a front view showing an embodiment in which the electronic copying apparatus is mounted on the electronic copying apparatus table, and FIG. 9 is a schematic view showing a main part of the embodiment shown in FIG. 8 (D). 1 ... table, 1a ... bottom plate, 1b ... door support member, 1c
…… Door, 1e …… Large cover, 1f …… Hole, 1g …… Small cover

Claims (1)

[Claims] 1. A mounting section for mounting an electronic copying apparatus, and a surface on a side for operating the electronic copying apparatus as a front surface,
A bottom plate laterally extending from the bottom of the placing part, a door support member fixed to the placing part and / or the bottom plate, which is arranged at a front end of the bottom plate, and the door supporting member. A door that is openably and closably supported, and an upper surface, a side surface, and a rear surface that have substantially the same height as the above-mentioned mounting portion for forming a storage chamber together with the door on the upper portion of the bottom plate. An electronic device comprising: a large cover that has a hole portion that is open over the entire area and that is removable from the bottom plate and the mounting portion; and a small cover that is detachably provided in the hole portion. Copying machine table.