JPS62186245A - Copying machine - Google Patents

Abstract

PURPOSE:To simplify the constitution of a copying machine and to reduce the cost and size of the machine by using an exposure optical system arranged on one position in common for both a mode using a platen and a mode using an automatic original feeder. CONSTITUTION:At the mode using the platen 2, an original platen 4 is forward moved to the right side from the position of an exposure part E, and after exposure scanning of an original O1, a driving gear 21 is reversed to backward move the original platen 4. The original platen 4 is started to be moved to the right side by the driving gear 21, exposure scanning is simultaneously started, and when the left edge of the original is moved up to the exposure scanning and position passing the position of a convergent optical transmission body end position passing the position of a convergent optical transmission body array 18, the movement of the original is stopped. At the mode using the automatic original feeder, a paper feeding roller 5 and a separation roller 6 are rotated interlocking with the rotation of the driving gear 21, and when an original O2 is sent until the leading edge side of the original O2 is pressed against the position of the exposure part E on the original platen 4, the movement of the original is stopped. When the driving gear 21 is rotated in the counterclockwise direction, the 1st and 2nd feeding rollers 8, 9 are rotated in the counterclockwise direction, so that the original is started to be sent, exposure scanning is started and objective exposing work can be completed within the moving period of the original platen 4.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a copying machine in which a pressure plate usage mode and an automatic document feeder/discharge device usage mode can be arbitrarily selected.

(Prior Art) A variety of copying machines have been provided in which an opening/closing body, which functions as both a pressure plate and an automatic document feeder/discharge device, is opened and closed from a document table also known as a contact glass. However, in the pressure plate use mode in which the automatic document feeder and ejector is not used, the opening/closing body, which is heavy due to the automatic document feeder and ejector, must be opened and closed with a relatively large force.

Therefore, copying machines have been provided in which an automatic document feeder and ejector is installed in a separate location from the document table, which is driven back and forth with books or regular documents placed thereon.
Since the exposure optical system is installed in two locations, one for each of the manuscript table and the automatic document feeder/ejector, costs are high and the number of parts increases, making it difficult to maintain equipment reliability and maintenance services. This poses a problem in that the copying machine itself becomes bulky due to poor performance and increased volume occupied by the exposure optical system.

(Objective) The object of the present invention is that even if only one exposure optical system is provided,
Make it possible to deal with both the pressure plate usage mode and the automatic document feeder/discharge device usage mode.

The purpose is to solve the above-mentioned problems.

(Structure) In order to achieve the above object, the present invention includes a first drive transmission system that transmits driving force from a drive source to a document table to drive the document table back and forth with respect to an exposure section, and a drive source. A second drive transmission system that transmits the driving force from the automatic document feeder and ejector to the automatic document feeder and ejector to drive the same is selected depending on the pressure plate use mode and the automatic document feeder and ejector use mode. shall be.

　　゛Hereinafter, the present invention will be explained based on one embodiment.

As shown in FIG. 1, the copying machine according to the embodiment of the present invention includes a copying machine main body 1, a pressure plate 2, an automatic document feed/discharge bag W (hereinafter referred to as ADF) 31, and the like. As shown in FIG. 2, a pressure plate 2 is provided on an original table 4, which is also called a contact glass. This pressure plate 2.

It is equipped with a cushioning material 2a, and the back side in the figure serves as a swinging fulcrum, and the front side can be opened and closed with respect to the document table 4 so as to move up and down. With the pressure plate 2 closed as shown in the figure, the cushion member 2a presses down the document 01 placed on the document table 4.

An ADF'3 is integrally provided on the document table 4 outside the opening/closing area of the pressure plate.

The ADF 3 includes a document feeding system including a paper feeding roller 5, a separation roller 6, a blocking roller 7, etc., a first feeding roller 8, a second feeding roller 9, and a driven roller 11 paired with each of these rollers.
．． 12, etc., and a document ejection system consisting of a paper ejection roller 13 and a driven roller 14, and is provided with a paper ejection tray 15.

An exposure optical system for illuminating the original and forming an image of the original onto the drum-shaped photoreceptor 16 includes a light source lamp 17.
The photoconductor includes a convergent light transmitting element array 18, etc., and is installed in the copying machine main body 1 (FIG. 1) together with a drum-shaped photoreceptor 16.

As shown in FIG. 3, the copying machine main body 1 is provided with a drive gear 21, and this gear 21 is driven to rotate in forward and reverse directions by a drive motor 20 (FIG. 7) also provided in the copying machine main body. For the sake of convenience, the unit in which the pressure plate 2, ADF 3, document table 4, etc. are integrated will be referred to as a scanning moving body, and will be designated by the reference numeral 100.A rack 22 is fixedly provided on this scanning moving body 100. Further, the scanning movable body 100 is provided with a gear 23 as a drive receiver.

By manually moving the scanning movable body 100 laterally, either the rack 22 or the drive receiver gear 23 can be selectively engaged with the drive gear 21 of the copying machine main body 1.

FIG. 7 shows the state when the drive gear 21 and the drive receiver gear 23 are engaged. In this figure, the gear 23 of the drive receiver meshes with the gear 24.

Gear 2 coaxially provided with intermediate shaft 31 of gear 24
5 meshes with a gear 26, and this gear 26 meshes with a gear 27 on the separation roller shaft 6a.

A separation roller gear 6A is provided on the separation roller shaft 6a via a one-way clutch 32, and this gear 6A is connected to the gear 2.
This gear 28 meshes with a paper feed roller gear 5A provided on the paper feed roller shaft 5a via a one-way clutch 33.

On the other hand, the gear 30 provided on the intermediate shaft 31 via the one-way clutch 34 is a first feed roller gear 8A.

The second feed roller gear 9A and the paper discharge roller gear 13A are in mesh with each other. In addition, in FIG.

Motor 20. All gear systems except the drive gear 21 are provided on the scanning movable body 100.

When the gear 23 of the drive receiver is in mesh with the drive gear 21, the gear 23 of the drive receiver is rotated in forward and reverse directions by the drive gear 21. At this time, the paper feed roller 5 is activated by the action of the one-way clutch 33, the separation roller 6 is activated by the action of the one-way clutch 32, and the 1171st feed roller 8, the 117th feed roller 8, and the paper discharge roller 13 are activated by the action of the one-way clutch 34. By.

Each rotates only in the counterclockwise direction indicated by the arrow (Figure 2).

As shown in FIG. 4, an arm 35 and an arm 36 are swingably provided on the shaft 21a of the drive gear 21, respectively.
The former arm 35 causes a switch 37 to perform a switching operation, and the latter arm 36 causes a switch 38 to perform a switching operation.

Note that a switch 39 is provided in addition to these switches.

Figure 5 shows the contact glass part seen from the back side.
The projections 41, 42, 43 provided in the positions shown respectively engage the arms 35, 36 and switch 39 of FIG. 4, respectively. Note that FIG. 6 is a view of the contact glass section seen through from above.

First, the operation of this embodiment when copying is performed using the original 01 placed on the original table 4 as shown in FIG. 2 will be described.

That is, this is the mode in which the pressure plate 2 is used. Generally, copies are made in this mode, and in the case of books, copies must be made in this mode.

In this mode, the paper output tray 15 shown in FIG. 2 is tilted to the right around the fulcrum 15a, and then the rack 22 is brought into engagement with the drive gear 21 as shown in FIG. . Then, due to the rotation of the drive gear 21, the document table 4
The drive gear 21 is moved forward to the right from the position of the exposure section E, and after completing exposure scanning for the document O on the document table 4, the drive gear 21
is reversed to move the document table 4 back.

Here, when the final copying is completed, the document table 4 is stopped at an intermediate position shown at the top in FIG. 8. Note that the mark R indicates the right end reference position in the original document 0 process shown in FIG.

In this state, when a start button (not shown) is pressed, the drive gear 21 is driven to move the document table 4 to the left.

Then, when the mark R moves 20 m/m to the left from the position of the convergent light transmitting body array 18, the protrusion 41 shown in FIG.
kicks away the follower 35a shown in FIG. 4, rotates the arm 35, and turns off the switch 37. The switching signal at this time is input to a control section (not shown), the rotation of the motor 20 (FIG. 7) is temporarily stopped, and the document table 4 is also temporarily stopped (step 1).

Next, the motor 20 rotates in the opposite direction, and the drive gear 21 starts moving the document table 4 to the right. At the same time, exposure scanning is also started, and the left end of the document is moved to the convergent light transmitter array 18. The document table 4 moves to the exposure scan end position past the position , and stops (step 2).

If the same copy is to be made continuously, the camera returns to the same position as step 1 (step 3), moves to the right again, and moves to the position of step 4 while performing exposure scanning. At this time, the protrusion 42 shown in FIG. 5 kicks away the follower 36a shown in FIG. 4, causing the arm 36 to rotate and turning off the switch 38. Accordingly, the drive gear 21 temporarily stops rotating. Then, the document platen 4 is reversely reversed and begins to be returned again, and when a predetermined number of copies have been completed, it returns to the intermediate position from step 5 to step 6 and stops.

The above is the operation of the embodiment of the present invention in the pressure plate usage mode.

Next, the ADF use mode will be explained. First, when the scanning movable body 100 in FIG. 3 is manually moved to the left and the drive receiver engages the gear 23 with the drive gear 21, the scanning movable body 100 is stopped in this state. At this time, the protrusion 43 shown in FIG. 5 operates the switch 39 shown in FIG. 4, and this operation causes the pressure plate use mode to be switched to the ADF use mode.

In this state, the original 02 is set in the position shown in FIG. After this, press the start button (not shown) on the main body of the copying machine.
The motor 20 in FIG. 7 starts rotating, and the drive gear 21 shifts to the third
Rotate counterclockwise in the figure. Then, this rotation is received by the gear 23 of the drive receiver in FIG. 7, and the gears 24, 25, 2
6. Paper feed roller 5 via 27.6A, 28.5A, etc.
and separation roller 6 rotate.

Then, the highest one of the originals 02 in Figure 2 is placed in the first page.
The document is fed through the feed roller 8 until the leading edge of the document is pressed against the exposure portion E on the document table 4 and then stopped. At this time, the first feed roller 8. The second feed roller 9 is in a stopped state due to the action of the one-way clutch 34 (FIG. 7).

The drive gear 21 stops after a predetermined rotation counterclockwise, and then rotates clockwise, causing the drive gear 23, gears 24, 2
5, one-way clutch 34, gear 30.8A, 9A
The first and second feed rollers 8 and 9 rotate counterclockwise via the rollers 8, 9, etc., and begin to feed the document located at the position of the first feed roller 8. That is, exposure scanning is started. On the other hand, the rotation of the gear 30 is transmitted to the paper discharge roller gear 13A, and the paper discharge roller 13 starts rotating.

The circumferential speeds of the first and second feed rollers 8 and 9 are made to match the moving speed of the g abutment when the document table 4 moves from step 1 to step 2 in the pressure plate use mode. Therefore, during the time the document table is moving, that is,
The desired exposure work can be completed with the rotation of the drive gear 21 corresponding to moving from step 1 to step 2.
after that.

Once the rotation of the drive gear is sufficient to discharge the original onto the tray 15, copying of one sheet in the ADF use mode is completed. After this is completed, the drive gear 21 stops rotating, rotates counterclockwise again, and sends out the second document. In the manner described above, multiple documents are sequentially fed and ejected one by one. be done.

As understood from the above points, the motor 20 and the drive gear 21 constitute the drive source of this embodiment, and the drive gear 2
1 constitutes an example of a first drive transmission system that transmits the driving force from its drive source to the document table 4 and drives it reciprocally with respect to the exposure section.

On the other hand, the drive receiver in FIG. 7 transmits the driving force from the drive source to the ADF, drives the document feed system 2, and the document discharge system, and exposes the document. This constitutes an example of a second drive transmission system that drives a document transport system for passing sheets through section E at the same speed as document table 4.

The first and second drive transmission systems are selected by means of moving the document table manually or mechanically,
For example, whether the drive gear 21 is engaged with the rack 22 or
The drive reception is done by meshing with the gear 23.

Note that when in the pressure plate use mode, it is unavoidable to move the document glass back and forth, and only one copy can be obtained with this back and forth movement, but when in the ADF use mode, the back movement of the document glass can be omitted. , the copying speed can be almost twice as high as that in the pressure plate mode, making it extremely efficient.

(Effects) According to the above five aspects of the present invention, the exposure optical system installed in one location can be used in both the pressure plate usage mode and the automatic document feeder/ejection device usage mode. This simplifies the process, reduces device costs, makes the copying machine more compact, and improves reliability and maintainability.

[Brief explanation of drawings]

Fig. 1 is an overall configuration diagram of an embodiment of the present invention, Fig. 2 is a cross-sectional view of the upper part of the above embodiment, Fig. 3 is a diagram showing a reciprocating drive mechanism of the document table, and Fig. 4 is a diagram for controlling the reciprocation of the document table. Figure 5 is a view of the area around the document table seen from the back side, Figure 6 is a view of the upper document table and document feed conveyance system of the above embodiment seen from above, and Figure 7 is a view showing the switch operating mechanism of the device. 8 is a perspective view of the drive mechanism of the automatic document feeder/discharge device, and FIG. 8 is a diagram for explaining the reciprocating position of the document table. 2... Pressure plate, 3... Automatic document feeder/discharge device, 4... Document table, 20... Drive motor, 21... Drive gear, 2
2... Rack, 23... Drive receiver is gear. U4 口Z ■Z Sensai δ Kuni v:) d Koku

Claims (1)

[Claims] A document table supported in a reciprocating manner, a pressure plate that can be opened and closed to press the document placed on the document table, a document feeding system, a document transport system, and a document feeding system provided outside the opening/closing area of the pressure plate on the document table. an automatic document feeder/discharge device having a document ejection system, a drive source, and a first drive transmission system that transmits the driving force from the drive source to the document table to drive the document table back and forth with respect to the exposure section; The driving force from the drive source is transmitted to the automatic document feeder and ejector, and the document feed system,
a second drive transmission system that drives the document ejection system and a document transport system for passing the document through the exposure section at the same speed as the document table; A copying machine comprising: means for selecting a first drive transmission system and a second drive transmission system according to a fixed automatic document feeder/discharge device usage mode.