JPS62189454A - Copying machine - Google Patents

Abstract

PURPOSE:To curtail the number of parts, and to improve the reliability and the maintenance service by placing fixedly a driving gear which is driven to rotate forward and backward, in a copying machine body, and engaging selectively a rack which has been fixed to an original platen side, and a driving receiving gear which has been provided on an original automatic feed and discharge device. CONSTITUTION:One piece of driving gear 21 is placed fixedly in a copying machine body 1, and this gear 21 is driven to rotate forward and backward by a driving motor 20 which has been provided on the copying machine body in the same way. To the driving gear 21 of the copying machine body 1, one of a rack 22 and a driving receiving gear 23 is engaged selectively, by moving a scan moving body 100 manually in the horizontal direction. In case of a state that the driving receiving gear 23 has been engaged to the driving gear 21, the driving receiving gear 23 is engaged to a gear 24, a gear 25 which has been provided coaxially on an intermediate shaft 31 of this gear 24 is engaged to a gear 26, and this gear 26 is engaged to a gear placed on a separating roller shaft 6a.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention provides a method for moving originals by a single drive source provided in the main body of a VI manuscript, in both the pressure plate use mode and the automatic document feeder/discharge device use mode. The present invention relates to a copying machine capable of both reciprocating the table and driving an automatic document feeder/discharge device.

(Prior art) An opening/closing body that doubles as a pressure plate and an automatic document feeder/ejector is attached to a document table, also known as a contact glass.

Various types of copying machines are available that can be opened and closed, but when in a pressure plate use mode that does not use an automatic document feeder/ejector, the opening/closer is heavy due to the automatic document feeder/ejector. must be opened and closed with a relatively large force each time a copy is made.

Therefore, copying machines have been provided in which an automatic document feeder and ejector is installed at a separate location for the document table, which is driven back and forth with books or regular originals being placed on the document table. Because the means for reciprocating the device and the means for driving the automatic document feeder and ejector were separately provided, costs increased and the number of parts increased, reducing the reliability and serviceability of the equipment. There was a problem that the copying machine itself became bulky.

(Objective) An object of the present invention is to provide a copying machine in which the drive source for the document table and the automatic document feeder/discharge device is shared, thereby eliminating the above-mentioned mass sales.

(Configuration) In order to achieve the above object, the present invention includes a main body of a copying machine.
The drive gear, which is driven in forward and reverse rotation, is fixed.

The drive gear is characterized in that a rack fixed to the document table side and a drive amount provided in the automatic document feed/discharge device selectively mesh with the gear.

The present invention will be explained below 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. It has an automatic document feeder/discharger (hereinafter referred to as ADF) 3, etc. As shown in FIG. 2, a pressure plate 2 is provided on a document table 4, which is also called a compact glass. The pressure plate 2 is provided with a cushion member 2a, and the rear side in FIG. 1 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 original O placed on the original 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 feed roller system consisting of a feed roller 51, a separation roller 6, a blocking roller 7, etc., and a first feed roller 8.
．． Second feed roller9. A document conveyance roller system consisting of driven rollers 11, 12, etc. that form a pair with each of these rollers, and a paper ejection roller 13. It mainly consists of a document discharge roller system consisting of a driven roller 14, and is provided with a paper discharge tray 15.

The automatic document feed/discharge roller system constituted by these rollers achieves the function of passing the document through the exposure section indicated by symbol E and discharging the document onto the 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.
It consists of a convergent optical transmitter array 18, etc.

It is installed in the copying machine main body 1 (FIG. 1) together with the drum-shaped photoreceptor 16.

As shown in FIG. 3, one drive gear 21 is fixed in the copying machine main body 1, 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 convenience, the unit that integrates the pressure plate 2, ADF 3, document table 4, etc. will be referred to as a scanning moving body, and will be denoted by the reference numeral 100.
2 is fixedly provided. Further, a gear 23 is fixed to the 80F3 to determine the amount of drive.

A drive gear 21 of the copying machine body 1 is selectively engaged with either a rack 22 or a drive gear 23 by manually moving the scanning movable body 100 laterally.

FIG. 7 shows a state when the drive gear 21 is engaged with the drive gear 23. As shown in FIG. In this figure, the amount of drive is determined by gear 23 meshing with 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 9^ and the paper discharge roller gear 13A are in mesh with each other. In addition, in FIG. 7, motor 2
0. All gear systems except the drive gear 21 are provided on the ADF 3.

When the gear 23 is in mesh with the driving gear 21, the driving amount is determined by the driving gear 23 being rotated in forward and reverse directions by the driving gear 21. At this time, the paper feed roller 5 is operated by the action of the one-way clutch 33, the separation roller 6 is caused by the action of the one-way clutch 32, and the first transport roller 8, the second transport roller 9, and the paper discharge roller 13 are activated by the action of the one-way clutch 34. By.

In FIG. 2, they rotate only in the counterclockwise direction indicated by the arrows.

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 is a view of the contact glass section from the back side, showing the protrusions 41, 42, and 43 provided at the positions shown in the figure, respectively.
are associated with arms 35, 36 and switch 39 in 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 O1 placed on the original table 4 as shown in FIG. 2 will be described.

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

In this mode, the paper discharge tray 15 shown in FIG. 2 is tilted to the right around the fulcrum 15a.

As shown in FIG. 3, the rack 22 is brought into mesh with the drive gear 21. Then, by the rotation of the drive gear 21, the yXX mounting table 4 is moved to the right from the position of the exposure section E, and
After completing exposure scanning for the original OI on the original platen 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 mark R indicates the right end reference position in document 01 in FIG.

In this state, if you press the start button (not shown), ii
By driving the moving gear 21, the document table 4 moves to the left. Then, when the mark R moves about 20 m/m to the left from the position of the convergent optical transmitter array 18, the protrusion 41 shown in FIG. 5 kicks away the follower 35a shown in FIG.
to turn off the switch 37.

The switching signal at this time is input to a control section (not shown), and the rotation of the motor 20 (FIG. 7) is temporarily stopped.
Similarly, the document table 4 once stops (step 1).

Next, the motor 20 rotates in the opposite direction, and the drive gear 21 starts to move the document table 4 to the right. At the same time, exposure scanning is also started, and the left end of the document is brought to the focusing light transmitter array. The document table 4 moves to the exposure scan end position past the position 18 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. Along with this, the drive gear 21 temporarily stops rotating.

Then, the document table 4 is reversely reversed again and begins to be returned, 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 use mode.

Next, the ADF usage mode will be explained. First, when the scanning movable body 100 in FIG. 3 is moved to the left by hand and the N drive gear 23 is engaged 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, document 0 is set in the position shown in FIG. After that, press the start button (not shown) on the main body of the copying machine.
The motor 20 in FIG. 7 starts rotating.

The drive gear 21 rotates counterclockwise when viewed from the direction of arrow F in FIG. Then, the amount of drive for this rotation is gear 2
3 receives, gears 24.25.26.27.6A, 28
The paper feed roller 5 and the separation roller 6 are rotated counterclockwise via .degree.5A and the like.

Then, the top one of the original documents in Figure 2.

Until the leading edge of the document is pressed against the exposed portion E on the document table 4 via the section of the first feed roller 8.

Sent and stopped. At this time, the first feed roller 8°
The feed roller 9 is in a stopped state due to the action of the one-way clutch 34 (FIG. 7).

After the drive gear 21 has rotated counterclockwise for a predetermined period, it is rotated once.

It stops and then rotates one clockwise direction. Then.

The amount of drive is determined by rotating the first and second feed rollers 8.9 counterclockwise via gears 23, 24.25, one-way clutch 34, gears 30.8A, 9A, etc. Start sending manuscripts that match. 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 document table 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.
Thereafter, if sufficient rotation of the drive gear is ensured to eject the original onto the tray 15, copying of one sheet in the ADF usage mode is completed. After this is completed, the drive gear 21 stops rotating, then rotates counterclockwise again, and the second document is sent out. Multiple documents are sequentially fed and ejected one by one in the manner described above. be done.

Note that when in the pressure plate use mode, it is possible to avoid moving the vK document table back and forth, as only one copy can be obtained with the back and forth movement, but when in the ADF use mode, the backward movement of the document table can be omitted. Therefore, the copying speed can be almost twice as high as that in the pressure plate use mode, which is extremely efficient.

(Effects) According to the above-mentioned first aspect of the present invention, the document table and the automatic document feeder and ejector are integrally configured and are driven by a single drive source. Compared to the conventional example in which the copying machine is driven by a source, the driving process is simplified, the number of parts is reduced, and the reliability and maintenance serviceability of one device are improved, and the size of the copying machine itself can be reduced.

[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. FIG. 5 is a view of the area around the document table seen from the back side, FIG. 6 is a view of the upper document table and document feed conveyance system of the above embodiment seen from above, and FIG. The figure 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...Press plate, 3...Automatic document feeder/discharge device, 4...
... Document table, 21 ... Drive gear, 22 ... Rack, 23 ... Drive amount is gear. ri〒shi ii 口 princess Z 圀杢d shaku■D 圀7P）e 久〃

Claims (1)

[Claims] a document table supported so as to be able to reciprocate with respect to the copying machine body;
An openable and closable pressure plate that presses down the original placed on the original table, and a document feeding/ejecting roller system provided outside the opening/closing area of the pressing plate on the original table to pass the original through an exposure section and eject the original. An automatic feeding/ejecting device, one drive gear fixed on the side of the copying machine body and driven to rotate in forward and reverse directions, and one drive gear fixed on the side of the document table and adapted to move the document table in the pressure plate use mode. A rack that meshes with the drive gear and reciprocates the document table relative to the exposure unit by being reciprocated by the drive gear, and a rack that is fixed on the automatic document feeder and ejector and moves the document table when the automatic document feeder and ejector is in use mode. A copying machine comprising a drive receiving gear that meshes with a drive gear and is rotated by the drive gear to drive the document feed/discharge roller system.