JPH0524666Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a document feeding device that feeds a manuscript such as a certified copy into a copying machine.

[Conventional technology]

2. Description of the Related Art Semi-automatic document feeding devices are known in which a document is manually inserted into a feed roller, and the document is driven toward a platen of a copying machine by driving the feed roller.

With such a semi-automatic document feeder, a sensor is placed in the document insertion area to detect the document in order to determine the timing for feeding the document into the copying machine, and the document detection signal from this sensor drives the feed roller, etc. The original is sent to the copying machine.

[Problem that the invention attempts to solve]

Such a semi-automatic document feeder is often used as a dedicated device, and one sensor is usually provided according to the size of document most frequently used.

For this reason, when feeding a small-sized original, the sensor may not be able to detect the original, and it may not be possible to feed the original in a timely manner.

For example, when copying a certified copy for government office work, the original may be folded in half and sent, and in this case, the size of the original is approximately half the size of the original that is normally copied. , the sensor may not be able to detect the original, and the half-folded original cannot be sent to the copying machine to be copied, making copying operations inefficient.

Therefore, with this invention, even large-sized manuscripts can be
It is an object of the present invention to provide a document feeding device capable of feeding even a small-sized document obtained by folding the large-sized document in half.

[Means and actions for solving problems]

A pair of feed belts and a sensor that are driven synchronously are arranged on both sides of the document conveyance path, and the detection signals from the pair of sensors are input to the controller via an OR gate, and the document is conveyed. In addition to making it possible to make the feed speed on both sides the same, the controller can be activated by the detection signal from either sensor, making it possible to feed a small-sized original by folding a large-sized original in half to one side. This is what I did.

〔Example〕

FIG. 4 is a schematic plan view of the copying machine, in which a copying machine 3 is installed adjacent to a copying machine 2 equipped with a semi-automatic document feeder 1. A certified copy is automatically created by folding, binding, stamping, stamping, etc.

FIG. 5 is an overall schematic explanatory diagram, in which a document fed from the document feeder 1 onto the platen 4 is subjected to diagonal exposure on the photoreceptor 6 by the exposure mechanism 5 to form an electrostatic latent image, and then At the same time, the toner image is transferred by a transfer device 8 onto a sheet 10 fed from a paper feeding device 9, fixed by a fixing device 11, and then fed into the creating machine 3. 1
2 is a cleaner, and 13 is a charger.

The document feeding device 1 is constructed as shown in FIGS. 1 and 2. As shown in FIG.

That is, first and second feed belts 21 and 22 are arranged in parallel on both left and right sides of the conveyance path 20 facing the feeding direction, and first and second entrance side sensors 23 and 24 are arranged on both left and right sides of the entrance side. together with the first in the middle part,
Second intermediate sensors 35 and 36 are provided, first and second exit side sensors 25 and 26 are provided on both left and right sides of the exit side, and first and second sensors 25 and 26 are provided on both left and right sides of the inlet side and on both left and right sides of the exit side. Inlet side gates 27, 28 and first and second outlet side gates 29, 30 are provided, and the first and second inlet side gates 27, 28 are operated synchronously by a first solenoid 31, and the first, The second exit side gates 29 and 30 are operated synchronously by a second solenoid 32.

The first and second feeding belts 21 and 22 are wound around a driving pulley 33 and a driven pulley 34, and the driving pulley 33 is connected to a motor 37 to feed the first and second feeding belts.
The feed belts 21 and 22 are driven synchronously.

As shown in FIG. 3, the first and second inlet side sensors 23 and 24 and the first and second intermediate sensors 3
5, 36 and first and second outlet side sensors 25, 26
are connected to a controller 39 via an OR gate 38, and the controller 39 outputs an operation signal in response to a detection signal from at least one of the sensors.

That is, when a document is inserted while the motor 37 is being driven to drive the first and second feed belts 21 and 22, the first and second entrance side sensors 23 and 24 are inserted.
is turned ON, the first solenoid 31 is energized by the controller 39, and the first and second inlet side gates 2 are energized.
7 and 28 protrude and the leading edge of the document abuts against the first and second entrance side gates 27 and 28 and stops. At the same time, the motor 37 is stopped by the controller 39 in synchronization with the abutment stop of the leading edge of the document. and the first solenoid 31 is the controller 39
is demagnetized by the first and second entrance gates 27,
28 is retracted.

Next, when the motor 37 is driven to drive the first and second feed belts 21 and 22, the previously fed document is conveyed and the first and second intermediate sensors 35 and 36 are moved.
is turned ON, the second solenoid 32 is energized by the controller 39, and the first and second exit side gates 29,
30 and stops when the leading edge of the original hits it, and then the first and second entrance side sensors 23 and 24 are turned ON by the original inserted into the entrance side, and the operation is performed as described above. At this time, the second solenoid 32 is demagnetized and the first and second exit side gates 29 and 30 are retracted.

In this state, when the motor 37 is driven to drive the first and second feed belts 21 and 22, the document positioned by the first and second exit gates 29 and 30 is fed onto the platen 4. At this time, the first and second exit sensors 25 and 26 detect the rear end of the document and turn ON.
The signal is input to a controller 39, which detects a feed shift between the two originals when the two originals are fed based on the time difference between the input ON signals.

The above-described operation is performed in the same manner.

In this way, the original is passed through the first and second entrance gates 27, 28 and the first and second entrance gates in the middle of the original transport path 20.
The exit side gates 29 and 30 are positioned and placed on standby, and the next signal activates the first and second solenoids 31 and 32.
The document is fed to the next position by controlling each gate and feeding the document to the next position, and by repeating this operation, the document can be fed to the platen 4.

Further, the motor 37 and the making machine 3 can be controlled by the detection signals of the first and second entrance side sensors 23 and 24 and the first and second intermediate sensors 35 and 36, and the sensor 25,2
Using the detection signal 6, it is possible to sense the misalignment between the two originals and to control the operation of each device in the copying machine 2.

In addition, since the feed belt and each sensor are arranged in pairs on both sides of the document conveyance path 20, it is possible to feed a small document that is folded in half from a large document in the same way, You can feed two originals at the same time.

For example, as shown in Figure 1, the left and right first and second
When feeding a large-sized original A that is wider than the distance between the feeding belts 21 and 22, the first and second
The document A can be detected by the entrance-side sensors 23 and 24, and when a small-sized document B obtained by folding the large-sized document A in half is sent in, the first entrance-side sensor 23 and the second entrance-side sensor are used. The document B can be detected by either one of the sensors 24, and the first and second entrance sensors 23, 24.
are provided on both the left and right sides, so when the small-sized document B is fed toward the left side as shown by the solid line in FIG. 1, the first entrance side sensor 23 can detect the document B. As shown by the imaginary line 1, when the document B is fed to the right side, the second entrance side sensor 24 can detect the document B, and even if a small size document is fed to the right or left, the document B can be detected.

[Effect of idea]

The pair of feed belts disposed on both the left and right sides of the conveyance path 20 are driven synchronously, so that the feed speed on both the left and right sides is the same, and the controller is operated by a detection signal from either one of the pair of sensors. A small-sized document obtained by folding a large-sized document in half can be sent to either the left or right side, and a large-sized document can be fed in as is.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a cross-sectional view of the document feeder, Fig. 2 is a sectional view of the gate attachment part, Fig. 3 is a control circuit diagram, and Fig. 4 is a schematic plan view of the copying apparatus. FIG. 5 is a schematic explanatory diagram. 20 is a conveyance path, 21 and 22 are second feeding belts,
38 is the or gate, 39 is the controller.

Claims (1)

[Scope of utility model registration request] A pair of feed belts are disposed at intervals in the left-right direction on both sides of the document conveyance path 20 orthogonal to the conveyance direction, and a motor 37 is provided to drive each feed belt in synchronization. 2
A controller 39 has a pair of sensors spaced apart from each other in the left-right direction at positions near the middle of the pair of feed belts in the left-right direction, and drives and controls the motor 37 and the like by transmitting detection signals from the pair of sensors through an OR gate 38. A document feeder characterized in that input is made to the document feeder.