JPS6323385Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a paper feeding device that feeds paper inserted into an insertion slot from a paper feeding tray to a set position in a copying machine or the like.

(Description of the Prior Art) To explain the case in which originals are sequentially fed to the set surface of a copying machine, this type of paper feeding device generally has two cases: a user inserts originals into the original table one by one, and a case where a plurality of originals are inserted in advance into the original table. There are two main types: when the paper is set and the device separates and imports the paper one by one.

In the former case, when manually inserting documents one by one, there is a grace period (delay time) for the user to take his hand off the document.
After that, it is necessary to feed the original into the device.

Conventionally, for example, as shown in FIG. 1', a document inserted into a document insertion slot 1' is fed into the device by a paper feed roller 3', and at the same time, the document from this paper feed roller 3' is transferred to a document set surface (platen). ) is set at the reference position by a conveyor belt 4' placed above. The paper feeding roller 3' and the conveyance belt 4' are connected to the same drive motor, and each means for feeding and conveying the paper is constituted by a single endless belt as shown in the figure, for example. Further, a pinch roller 2' is provided at the document insertion opening of the paper feeding means 3' so as to be able to press against and separate from the pinch roller 2', and the operation of each part is controlled as follows.
First, when a document is prepared in the insertion slot 1' by the user, this is detected by a sensor, and a detection signal from this sensor is sent to the conveying means (the endless belt 4' shown).
The pinch roller 2' is turned on based on the AND condition with the paper feed instruction signal that is transmitted when the copying machine stops after completing a predetermined copying cycle, and after a predetermined delay time, the endless belt 4' is activated.

Therefore, it is fine if the user inserts the original at the same time as the device feeds the original, but if the user inserts the original while the previous original is being sent or ejected, it is fine. In such a case, the user must wait while holding the document in his hand until the next paper feeding timing.

Therefore, if it is possible to replenish such originals regardless of the paper feeding timing (paper feeding interval) on the device side, the user will be able to replenish originals at regular intervals or manually feed originals at random without having to wait. is possible.

To do this, for example, as shown in Japanese Patent Application Laid-Open No. 49-49640, it is sufficient to separate the drives of the paper feeding means and conveying means so that they can operate independently. In contrast, in a device in which the user manually inserts documents one by one, the following new problem arises.

In other words, when a document is inserted into the insertion slot, it needs to be held, and in the conventional structure where a pinch roller presses against the paper feed means to hold the document when the document needs to be fed, the user has to hold it by hand and wait for the timing. Also, if a document is inserted at the same time as the above timing, the document is fed in without the user having time to adjust the document position, causing problems such as jams and skew.

(Purpose of the invention) The present invention is capable of holding the paper inserted into the paper feed tray in an oriented state, and feeding the paper towards the set position at a timing corresponding to the copying cycle. Even if paper is inserted just before the feeding timing such as, it is possible to deliver the paper to the device in the correct orientation, making it possible to feed the paper in the correct orientation and at the same time making it easier to insert the paper. The purpose is to provide a paper feeding device.

Hereinafter, the present invention will be described with reference to a case where paper (original) is fed and set at the set position (original set surface) of a copying machine from a paper feed table (original table).

(Structure of the invention) In order to achieve the above-mentioned object, the present invention first uses a drive system that separates the paper feeding means that feeds the original prepared for insertion into the document table into the apparatus, and the conveying means that feeds and sets the original on the setting surface. Configure into a system. In other words, the clutch means 8 connects the drive motor connected to the conveying means and the paper feeding means.
Connect via.

A pinch roller is provided in the insertion slot so as to be able to press against and separate from the paper detection sensor 5 and the paper feeding means.

Therefore, after a first delay time from the signal detected by the sensor 5, the pinch roller 6 is moved from the separation position to the pressure contact position to hold the document, and a second delay time is set based on the signal from the sensor 5. After that, the clutch means 8 is connected to start and rotate the paper feeding means 2.
The feature is that two delay times are set.

(Explanation of operation) When a user inserts a document into the document insertion slot at random (regardless of the copying process timing), the sensor 5 detects this and releases the pinch roller after a predetermined time (first delay time). 6 holds the original in pressure contact with the paper feeding means, so it is possible to arrange the original in the correct posture during this first delay time.

Further, the first delay time is set to a sufficient time to adjust the inserted document to the correct orientation.

After the first delay time ends, the user releases the document and starts inserting the next document.
Due to the timing of the copying process, the paper feeding means may start rotating immediately after the pinch roller has bitten the document.

However, since the second delay time is set for the activation of the paper feeding means, sufficient time is secured for the user to take his hand off the document.

In other words, the present invention allows the user to insert the original, hold it in the correct position, confirm that the original is held by the pinch rollers, and then release the original. The original can be inserted regardless of the timing.

(Explanation of Embodiment) The illustrated example shows the present invention applied to the original setting surface 3 of a copying machine.
This is a case where the present invention is adopted in a device that supplies and sets originals.

A feeding device B is constructed by sequentially disposing a document table 1, a paper feeding means (feeding roller) 2, and a conveying means 4 on a document setting surface 3 of the main body A of the copying machine.

The document table 1 has a bottom plate 9 and a pair of left and right side edge guides 10.
and protrudes from the document insertion slot 11 of the device. The document table 1 serves as a guide for inserting a document into the apparatus, and is not limited to the structure shown in the drawings, but may have a variety of other structures.

The paper feed roller 2 is constructed by mounting a plurality of Delrin resin rolls at appropriate intervals on a support shaft 12, and a paper guide 13 is provided around the outer periphery of the roller 2.
The original from the original platen 1 reaches the entrance end of the original setting surface 3 along this paper feed roller 2, but this paper feed roller 2 is not limited to the one shown in the figure.
It may be constructed of a group of small rollers at appropriate intervals along the line.

The conveyance means 4 is constituted by an endless belt that slides from one end of the document setting surface 3 of the main body of the copying machine to the other end. One of the pulleys of this endless belt (14 shown)
A drive motor 21 is connected to. (Described later) A pinch roller 6, a document detection sensor 5, and an alignment claw 7 are provided in the order shown in the figure on the document insertion opening 11 side of the paper feed roller 2.

The pinch roller 6 is loosely fitted into a support arm 15, and this support arm 15 is pivotally supported on the machine frame so as to be swingable.
An operating solenoid 16 is connected to the other end.
The document detection sensor 5 may be any means for detecting the insertion of a document, but the one shown in the drawing is constructed by disposing a limit switch on an actuator 17 that operates at the leading edge of the paper (document).

The alignment claw 7 is reciprocally linked to the support arm 15 of the pinch roller 6 in order to align the right and left ends of the inserted document. (not shown), that is, the pinch roller 6
When the document is evacuated from the document feeding path (state shown in Figure 2)
The alignment claws 7 enter the feeding path, and are interlocked so that when the pinch roller 6 comes into contact with the paper feeding roller 2, the alignment claws 7 are retracted from the feeding path.

In addition, the document detection sensor 5 and the pinch roller 6
The operating solenoid 16 is linked with the pinch roller 6 so that the pinch roller 6 joins the paper feed roller 2 and pinches the document after a predetermined time has elapsed after the sensor 5 detects the document.

In other words, the pinch roller 6 is moved to the paper feed roller 2 after the first delay time from the signal that the sensor 5 detects the document.
press against.

Reference numeral 18 in the figure is a document regulating stopper disposed at a copying reference position on the document setting surface 3 so as to be able to move toward and away from the document setting surface, and 18' is an operating solenoid thereof.

In this structure, the paper feed roller 2 and the conveyance means 4 can be driven individually, but are connected to the drive motor 21 as described below.

The conveying means 4 shown in the figure is constituted by an endless belt, and the shaft 14' of the pulley 14 and the drive motor 21 are interlocked by a timing belt 19. The clutch means 8 shown in the drawing is constituted by an electromagnetic clutch.

A timer is activated by a document detection signal from the document detection sensor 5, and the clutch means 8 is engaged after a predetermined period of time has elapsed.

That is, after a second delay time based on the signal from the sensor 5, the clutch means 8 is connected to start and rotate the paper feed roller 2.

Therefore, when a document is inserted into the document insertion port 11, the roller 2 is connected to the drive motor 21 after a predetermined buffer time has elapsed.

The first delay time and the second delay time may be set based on the signal detected by the sensor 5 using a timer or other delay means, and the second delay time may be set based on the signal detected by the sensor 5. The calculation may be started from the detection signal No. 5 or from the time of the joining operation of the pinch roller 6 to the paper feed roller 2.

Therefore, to give an example of the operation control of such a device, the first example is
If the leading edge of the document is inserted into the document insertion slot 11 in the state shown in the figure, the document detection sensor 5 will detect it.

After a normal document insertion grace period (set by a timer), that is, after a first delay time, the pinch roller 6 is first connected to the paper feed roller 2 by the actuating solenoid 16.

Then, the leading edge of the document is supported between the pinch roller 6 and the paper feed roller 2, and the user releases his/her hand from the document. After the operation time for the user to release his/her hand from the document (the above-mentioned second delay time), the clutch means 8
are engaged with each other, and the drive motor 21 is connected to the paper feed roller 2. Next, when the drive motor 21 is energized, the paper feed roller 2 and the conveying means 4 are both interlocked, and the document is brought onto the document setting surface 3 by the paper feed roller 2. Then, the document is moved along the setting surface 3 by the conveying means 4 and is stopped by hitting the regulating stopper 18. At this time, the conveying means 4 stops the drive motor 21 so that the original reaches the regulating stopper 18 gently due to inertia.

When the driving motor 21 is activated again upon receiving a signal indicating that copying of the original on the original setting surface 3 has been completed, the original on the original setting surface 3 is ejected from the apparatus.

At this time, the clutch means 8 is returned to the disengaged state after a predetermined time period for sending the document to the conveying means 4 from its engagement.

Therefore, the paper feed roller 2 is in a stopped state, and when the next document is prepared in the document insertion slot 11, even if the above-mentioned conveyance means 4 is being driven to eject the document after copying, the above-mentioned operation is immediately performed. Repeat the action.

In other words, even if the drive motor 7 and the conveyance means 4 are rotating, the clutch means 8 engages the document prepared in the document insertion slot 11 after the first and second delay times required for this preparation have passed, and the document feed roller 2 rotates and sends this original to the entrance end of the original setting surface 3.

In the process of inserting paper into the paper feed tray and feeding it to the set position by the paper feed means, the first delay time and the second delay time are set by a timer or the like based on the signal from the paper detection sensor. Set by means, the first
The second delay time is provided between the detection of paper insertion and the time when the paper is held by the pinch rollers, allowing the user to properly align the inserted paper. This is provided between the paper feeder and the paper feeder to feed the paper into the device, allowing the user to confirm that the paper is being held and then release the paper. It is possible to hand over the paper.

In addition, the paper feeding means that pulls the paper into the device and the conveying means that feeds and sets the paper from the paper feeding means to the set position can be separated and operated by the clutch means, thereby facilitating processing such as copying. Paper can be inserted into the device regardless of process timing.

[Brief explanation of drawings]

FIG. 1' is an explanatory diagram of the prior art, and FIGS. 1 to 3 are explanatory diagrams showing one embodiment of the present invention. FIG. 1 is a longitudinal sectional view, FIG. 2 is a plan view of the main part, and FIG. 3 is a front view of the main part. DESCRIPTION OF SYMBOLS 1... Original table, 2... Reversing roller, 3... Original setting surface, 4... Conveyance means, 5... Original detection sensor, 6... Pinch roller, 7... Drive motor,
8...Clutch means.

Claims (1)

[Claims for Utility Model Registration] A paper feed table 1 having a paper insertion slot 11 and guiding the paper to the paper insertion slot 11; and a paper feeder feeding the paper from the paper insertion slot 11 toward a setting position 3. In a paper feeding device comprising a means 2 and a conveying means 4 for conveying and setting the paper from the paper feeding means 2 onto a setting position 3, a paper detection sensor 5 is provided in the insertion slot 11 and a paper detection sensor 5 is provided in the paper feeding means 2. Pinch roller 6 that can be pressed and separated
and a drive motor connected to the paper feed means 2 and the transport means 4 are connected via a clutch means 8, and a first delay is established based on a signal detected by the paper detection sensor 5. and a delay means for setting a second delay time longer than this delay time, and after the first delay time, the pinch roller 6 is brought into pressure contact with the paper feeding means 2 to hold the paper, and at the same time, a second delay time is set. A paper feeding device characterized in that, after a delay time, the clutch means 8 is connected to start and rotate the paper feeding means 2.