JPS6237234Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an electronic copying machine in which copy sheets of a plurality of sizes are set in advance and the sheets can be selected and used according to the original size.

This type of copying machine has been manufactured and put into practical use for a long time, but in the past, multiple paper cassettes (generally two types) were often arranged in a vertically stacked manner inside the copying machine body. . As a result, the overall height of the device increases, and the device is too tall to be placed on a ready-made table or desk. For this reason, the actual situation was to purchase and use a table specifically for the copying machine. Additionally, in the past, both of the paper cassettes mentioned above were completely housed inside the copying machine, making it troublesome to replenish copy paper, and it was extremely difficult to check the amount of copy paper remaining without opening the door each time. It was inconvenient.

This idea was made in view of the above points,
It is an object of the present invention to provide an electronic copying machine that can selectively and automatically feed copy sheets of different sizes, downsize the entire device, and further improve functionality greatly.

An embodiment of this invention will be described below with reference to the drawings. FIG. 1 shows, for example, a drum-type electronic copying machine of the document table moving type according to the present invention, in which a housing 1 has a top surface that supports a document 2 and can reciprocate in the horizontal direction (in the direction of the arrow in the figure). A document table 3 is provided. At predetermined portions at both ends below the document table 3, there are detectors for detecting the start position and back position of the document table 3, such as a normally open micro switch 4,
5 is provided. That is, the switch 4
Detects the start position of the document table 3. When the document table 3 is at the start position (the position shown in the figure), it is detected by turning on a protrusion 6 provided at a predetermined position on the left end of the bottom surface of the document table 3. The switch 5 detects the back position of the document table 3, and is turned on by the protrusion 6 to detect when the document table 3 moves forward and is located at a predetermined position. However, when the document table 3 moves forward,
The original 2 placed thereon passes over the exposure lamp 7 and is irradiated by the lamp 7, and the reflected light reaches the photosensitive surface 11a of the photosensitive drum 11 through the mirror 8, lens 9, and mirror 10. , the image of the original 2 is formed on the photosensitive surface 11a. The photosensitive drum 11 rotates in the direction of the arrow shown in the figure, and first the charger 1
2, the photosensitive surface 11a is charged, and then the image of the original 2 is exposed to slit light to form an electrostatic latent image on the photosensitive surface 11a. This electrostatic latent image becomes noticeable when a developer is applied by the developing device 13, and the image of the document 2 appears on the photosensitive surface 11a. The developer on this electrostatic latent image is attracted to the copy paper cassette by charging the copy paper in the transfer charger 14, thereby transferring the image of the original 2 onto the copy paper. The photosensitive surface 11a after the transfer is reversely charged by the charger 15, thereby removing the previous charge. Then, a small amount of developer remaining on the photosensitive surface 11a is removed by a cleaning device 16, and finally the electrostatic latent image is erased by a fluorescent lamp 17.

Reference numerals 19a and 19b are cassettes that collectively store a large number of copy sheets 18a and 18b of different sizes, respectively.The cassette 19a is inserted through a cassette insertion slot (to be described later), and the cassette is placed at a predetermined position inside the housing 1. The whole thing is stored. on the other hand,
The cassette 19b is inserted through a cassette insertion opening, which will be described later, provided on the same side as the insertion opening for the cassette 19a. As shown in FIG. 1, this cassette 19b has a portion thereof, that is, about half of the entire cassette 19b, extending outward from the housing 1 in a direction perpendicular to the cassette insertion direction (direction of arrow a in FIG. 3), which will be described later. It is mounted so that it is held in a position where it protrudes. Insertion openings for these cassettes 19a and 19b are provided at the positions shown in FIG. FIG. 3 shows the external appearance of the copying machine, and the copying machine housing 1 is provided with an operation section including push button switches 43a and 43b for paper selection, which will be described later. 35 is cassette 1
The insertion port 36 is the insertion port for the cassette 19b, and the insertion ports 35 and 36 are provided on the same side of the housing 1 on which the operation section is provided, and on the same plane. ing. and,
Each cassette 19a, 19b is inserted by sliding in the direction of arrow a. The cassette 19a has a larger size than the copy paper stored in the cassette 19b.
Paper that is used relatively less frequently than the copy paper stored in 9b is stored. Also, cassette 1
9b is open only at the portion that enters the housing 1 to prevent the copy paper from scattering. Therefore, the copy sheets 18a and 18b stored in the respective cassettes 19a and 19b as described above are transferred to the corresponding paper feed means (paper feed rollers 20a and 20b to be described later) in synchronization with the rotation of the photosensitive drum 11. ), the cassettes are taken out in opposite directions, and in a direction perpendicular to the aforementioned cassette insertion direction. After passing through the guide paths 37a and 37b, the taken out copy paper is further conveyed by the conveyance roller 21, which is a conveying means, through one common guide path 22, until it reaches the charger 14, and is temporarily stopped. Ru. After that, the conveyance roller 21 operates again, and the copy paper that had been temporarily stopped is moved to the photosensitive surface 1 at the same time.
1a and the charger 14, and the charger 14
The photosensitive surface 11a comes into close contact with the photosensitive surface 11a, and the image on the photosensitive surface 11a is transferred. The copy paper after the transfer is peeled off from the photosensitive surface 11a by a peeling device 23, and transferred to a conveyance path 24.
and is sent to the fixing device 26 by the carry-in roller 25,
The paper is heated and fixed by passing through the fixing device 26, and is transferred from the paper output port 28 to the tray 29 by the delivery roller 27.
is discharged.

For example, normally open micro-switches 46a and 46b are provided in the middle of the guide paths 37a and 37b to detect whether or not the supplied copy sheets 18a and 18b are fed at a predetermined timing. Further, a normally open micro switch 30, for example, is provided in the middle of the guide path 22. That is, the switch 30 is turned on when the leading edge of the copy paper being transported by the transport roller 21 presses the actuator, and remains on until the copy paper finishes passing therethrough. Note that the detection signal from the switch 30 is used as a control signal for temporarily stopping copying paper and as a signal for abnormality detection, which will be described later. Also,
Between the fixing device 26 and the carry-out roller 27,
A detector for detecting copy paper (discharged paper) passing therethrough is provided, for example, a normally open microswitch 31. That is, this switch 31 is turned on when the leading edge of the copy paper sent out from the fixing device 26 presses the actuator, and remains on until the copy paper finishes passing through the actuator. If the state is maintained, it will be detected as an abnormality. In the figure, 34 is a heating prevention fan, and 47 is a main motor that drives the entire device.

Incidentally, the selection of the copy sheets 18a and 18b is carried out depending on whether or not the paper feed rollers 20a and 20b are brought into contact with the corresponding copy sheets 18a and 18b, which will be explained below. Each of the paper feed rollers 20a and 20b has shafts 38a and 38, respectively.
It is attached to one end side of arms 39a and 39b that rotate around b. and arm 39
Adsorption pieces 40a and 40b are provided on the other end sides of a and 39b, and these adsorption pieces 40a and 40b face magnets 41a and 41b, respectively. In this way, when the magnets 41a, 41b are energized, the attraction pieces 40a, 4 of the arms 39a, 39b
0b is attracted against the restoring force of springs 42a and 42b, and the paper feed rollers 20a and 20b are raised upward and brought out of contact with the copy sheets 18a and 18b. This will be explained with reference to FIG. In FIG. 2, 43a and 43b are push button switches for paper selection, 44a and 44b are amplifier circuits, 45 is a power supply,
41a and 41b are the magnets mentioned above. The contacts of the pushbutton switches 43a and 43b open when the pushbutton is pressed, and when one of them is turned off (pressed), the other is turned on. For this reason, for example, the switch 43a is used to select the copy paper 18a, and the switch 43b is used to select the copy paper 18b.
If it is for selection, pressing the switch 43a opens its contacts and closes the contacts of switch 43b.
Further, when the switch 43b is pressed, its contacts open and the contacts of the switch 43a close. Therefore, when the switch 43a is pressed to select the copy paper 18a, the magnet 41a is de-energized and the magnet 41b is energized, so the paper feed roller 20b is separated from the copy paper 18b, and only the paper feed roller 20a is used for copying. The paper 18a is fed by contacting the paper 18a.

Note that although FIG. 3 shows the external configuration of this copying machine as described above, the configuration is explained in Part 1.
The same parts as those in the figure and FIG. 2 are given the same reference numerals and will be omitted.

In such a configuration, for example, as copy paper
If two types, A4 size and A3 size, are to be set in advance, the A4 size, which is used more frequently and is smaller in size, is stored in the cassette 19b, and the A3 size is stored in the cassette 19a. In this way, the cassettes 19a, 19a and 18b respectively contain copy sheets 18a and 18b.
19b is set at a predetermined position within the housing through respective insertion openings 35 and 36 provided on the same side surface and on the same plane of the housing 1 on which the operating section is provided. That is, the cassette 19a is completely housed in a predetermined position in the housing 1 from the operation surface side of the copying machine through the insertion slot 35 as shown in FIG. Further, the cassette 19b is housed in the housing 1 on the same plane as the cassette 19a through the insertion slot 36 from the operation surface side of the copying machine. Further, as shown in Fig. 1, about half of the cassette 19b is exposed from the housing 1 in a direction perpendicular to the cassette insertion direction, that is, not from the operation surface of the copying machine but from the side surface adjacent to the operation surface. is retained. In this way, for example
When a copy of A4 size is required, press the selection switch 43b, and as shown in FIG. 2, the contacts of the selection switch 43b open and the contacts of the selection switch 43a close, and only the magnet 41a is energized. Arm 39 on the paper feed roller 20a side
a rotates, and the paper feed roller 20a moves upward and away from the copy paper 18a. On the other hand, paper feed roller 2
On the 0b side, since the magnet 41b is in a non-excited state, the tensile force of the spring 42b causes the paper feed roller 20b to
is pressed against the copy paper 18b, and the copy paper 18b (A4 size) is sent out by rotation of the paper feed roller 20b. Thereafter, it is copied according to the normal copying procedure and sent to the tray 29. It goes without saying that when carrying out the series of operations described above, the power switch and other various operation switches are of course turned on, and the machine is already in a state where copying is possible.

Furthermore, when A3 size copying is required, pressing the selection switch 43a will energize the magnet 41b and the paper feed roller 20b will move away from the A4 size copy paper 18b, so that only the A3 size copy paper 18a will be produced. Paper is fed.

In the above embodiment, the copy paper is a combination of A4 size and A3 size, but it is not limited to this, and it is of course possible to use any combination such as A4 size and B4 size. However, the combinations are not limited as long as the more frequently used paper is stored in a cassette that is exposed to the outside.

As described above, according to this invention, the insertion slots for each cassette that collectively stores two types of copy paper of different sizes are provided on the same plane on the same side of the copying machine housing, and Two types of cassettes can be housed on the same plane within the casing by making the paper feeding directions from the cassettes opposite to each other and perpendicular to the cassette insertion direction. Also 2
One of the types of cassettes is made to protrude outside the copying machine housing, and the other can be completely housed in the copying machine housing. Furthermore, by conveying copy sheets selectively fed from either one of the cassettes to the copying mechanism through one path, the conveyance path for the copy sheets can be simplified. Therefore, the height of the copying machine casing and the width in the paper feeding direction can be kept to a minimum, and the internal mechanism can be simplified, thereby making it possible to reduce the size and cost of the entire apparatus.

In addition, by providing the cassette insertion slot on the same side as the operating section, the operator can insert and remove the cassette from the copying machine housing while facing toward the operating surface of the copying machine. I made it possible to do it with .
Moreover, by making the protruding direction of the cassette the same as the paper feeding direction, which is perpendicular to the insertion direction of the cassette, the cassette does not protrude toward the operation surface of the copying machine, which means that the cassette does not get in the way during operation. Furthermore, the cassette is made to protrude from the adjacent side surface perpendicular to the operation surface, so that the operator can easily check the amount of copy paper remaining in the cassette while performing operations. Therefore, it is possible to provide an electronic copying machine which is extremely advantageous in terms of operability and maintainability.

[Brief explanation of the drawing]

The drawing shows one embodiment of this invention.
The figure is an internal configuration diagram, FIG. 2 is a circuit diagram for controlling paper feed, and FIG. 3 is an external perspective view. 1... Housing, 3... Original table, 18a, 18b...
...Copy paper, 19a, 19b...cassette, 20
a, 20b...paper feed roller, 35, 36...cassette insertion slot, 43a, 43b...push button switch for paper selection.

Claims (1)

[Scope of utility model registration request] A casing that houses a copying mechanism and has an operating section thereof, first and second paper cassettes that collectively store copy sheets of different sizes, and a side of the casing where the operating section is provided. first and second cassette insertion ports provided on the same side and on the same plane, into which the first and second paper cassettes are inserted;
means for storing the entire first cassette inserted from the first insertion port in a predetermined position of the casing; and means for storing a part of the second cassette inserted from the second insertion port outside the casing. The cassette insertion direction means a means for installing the copy paper at a position protruding in a direction perpendicular to the cassette insertion direction, and a means for feeding the copy sheets of the first and second paper cassettes in opposing directions and in a direction perpendicular to the insertion direction of the cassette. a paper feeding means that is selectively operated by the unit and feeds copy paper from either the first or second paper cassette; An electronic copying machine characterized by comprising: a conveying means for conveying the digital copying machine to the copying mechanism.