JPH02110046A - Manuscript feeding device - Google Patents

Abstract

PURPOSE:To miniaturize the whole device by driving the first carrying means, which is receiving a manuscript by the first direction rotation of a motor and carrying the manuscript, and the second carrying means, which is receiving the manuscript by the second reverse direction rotation and carrying the manuscript to a given part. CONSTITUTION:A motor is rotated by a given frequency with a main control part by depressing a copy key, the manuscript P on a loading base 6 falls by dead weight due to the descent of an entrance stopped 18 to slide into a take-in roller pair 9 and 9. Then when a motor 38 is driven in normal rotation for a given time, only the pair 9 and 9 is rotated by the action of one-way clutches 13 and 33, and the manuscript P is taken in with the roller pair 4 to be abutted to a resist roller pair 27. After that when the motor 38 is stopped and driven in reverse rotation, only the pair 27 and a carrying belt 28 are rotated via the clutches 13 and 33, and the manuscript P is sent between the belt 28 and a manuscript base 2. Thus motors and their driving circuits can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a document feeding device that automatically feeds a document onto a document table (exposure position) in, for example, an electronic copying machine.

[Technical background of the invention]

Generally, for example, a document feeding device (document feeder) of an electronic copying machine includes a document feeder that supplies a document, a take-in roller that takes in the document supplied from the document feeder, and conveys the document while correcting misalignment, etc. It is equipped with a conveyor belt that receives the document sent from the take-in roller and sends it onto the document table. The take-in roller and the conveyor belt were each driven by independent, dedicated motors.

[Problems with background technology]

However, in the conventional configuration described above, since each motor has its own independent motor, the motor itself and the motor drive and control circuit are required to be duplicated. In addition, the document feeder must be able to be opened and closed freely on the document table when copying books or other materials that cannot be used with it, but for the reasons mentioned above, it is heavy and bulky, making it inconvenient to use. there were.

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and an object thereof is to provide a document feeder that can reduce the number of motors and their drive circuits without impairing functionality, thereby reducing the size and weight of the entire device. It is about providing.

[Summary of the invention]

The present invention is configured such that, for example, a take-in roller serving as a first conveying means and a conveying belt serving as a second conveying means are selectively and selectively driven by a single motor, and the drive switching is performed by the rotational direction of the motor. It is something.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings.

1 to 3, reference numeral 1 denotes a copying machine body, and an original platen (transparent glass) 2 is provided on the upper part of this copying machine main body 1. A document feeding device 3 is provided so as to be openable and closable. The document feeder 3 is configured as follows. That is, the apparatus main body (not shown in detail) 4 is provided with a mounting table 6 in an inclined state, which forms the bottom part of a document supply section 5 that can accommodate a plurality of originals P at once in an inclined state. A pair of side regulating plates 7.degree. 7 are provided on the upper surface of the mounting table 6 and are slidable in a direction orthogonal to the feeding direction depending on the size of the document P. On the inclined upper end side of the document supply section 5, when the document P is set in the transverse direction, it can be rotated and stored on the mounting table 6 as shown by the two-dot chain line in FIG. When setting, the document support member 8 is pivotally mounted so that it can be rotated approximately 180 degrees to form an extension of the a placement table 6, as shown by the solid line in FIG.

Further, a pair of take-in rollers (a first
Transport means) 9, 9 are provided. Take-in roller pair 9
, 9 are provided in a direction perpendicular to the feeding direction of the document P and are attached to a shaft 1o. Both ends of the arm 12.12 are held at the free end side of an arm 12.12 which is rotatably attached to a shaft 11 horizontally suspended so as to face approximately the center in the vertical direction. And the roller shaft 10
A gear 14 is attached to one end of the gear via a one-way clutch 13, as shown in FIG. On the other hand, the lower intake roller (driven roller) 9, 9 of the intake roller pair 9, 9
is attached to a roller shaft 15 that is rotatably horizontally mounted on the lower side of the mounting table 6, and is connected to the upper take-in roller 9° through a through hole 16.16 formed in the mounting table 6. It is designed so that it can be inverted with 9.

Further, an inlet stopper 18 is provided on the inclined lower end side of the document supplying section 5, and is capable of retracting onto the placing table 6 through a slit-shaped through hole 17 formed in the placing table 6. The original document P is placed between the entrance stopper 18 and the side regulating plate 7,
They are stacked on the mounting table 6 with the leading end and both side ends restricted by 7. Then, when the copy key 20 provided on the operation panel 19 of the copying machine main body 1 is pressed, the entrance stopper 18 comes out below the loading table 6 as described later, and takes in the original P. vs 9,
It is designed to be emitted towards the transition section 9.

Incidentally, the inlet stopper 18 is attached to a support member 22 rotatably provided on a support shaft 21 below the mounting table 6, as shown in FIGS. 4 and 5. An action receiving part 23 extending at a right angle is integrally formed on the pivot end side of the support member 22, and a spring 24 is connected to the tip of this action receiving part 23. The spring 24 always urges the support member 22 in a clockwise direction (that is, in the direction in which the inlet stopper 18 projects above the mounting table 6). Further, the midway portion of the action receiving portion 23 is in sliding contact with the circumferential surface of the eccentric cam 25, and as the eccentric cam 25 rotates, the support member 22 is moved counterclockwise ( In other words, the inlet stopper 18 is rotated in the direction in which it is pulled out from above the mounting table 6.

Note that the eccentric cam 25 is rotationally driven by, for example, a motor (not shown). Further, in FIG. 2, 26 is a detection switch for detecting the presence or absence of the document P.

On the other hand, in front of the take-in roller pair 9, 9, the document P from the take-in roller pair 9, 9 is received, and the next conveyor belt (second
A pair of registration rollers 27 are provided to feed the document P to the transport means) 28, and between the upper registration roller (drive roller) 27 of the pair of registration rollers 27 and the upper take-in roller 9, there is provided a pair of registration rollers 27 for controlling the amount of deformation of the document P. A guide plate 29 is provided in an inclined state. The conveyor belt 28 is stretched between rollers 30 and 30 on the upper surface side of the document table 2, and conveys the document P that is sent between the document table 2 and the document table 2 by a pair of registration rollers 27. It is adapted to be fed or discharged.

Then, the upper registration roller 2 of the registration roller pair 27
As shown in FIG. 3, a sprocket 32 is attached to one end of the rotating shaft 31 of No. 7, and a gear 34 is attached via a one-way clutch 33.
4 meshes with gear 14. Further, as shown in FIG. 3, a sprocket 36 is attached to one end of the rotating shaft 35 of the roller 30 on the starting end side on which the conveyor belt 28 is stretched. The chain 37 is in a suspended state. and,
A gear 39 attached to the rotating shaft of a stepping motor 38 is meshed with the gear 34, so that the motor 38
The gear 34 is rotationally driven.

In FIG. 2, reference numeral 40 denotes an exit stopper for stopping the original P conveyed onto the original platen 2 at a specified position, which is provided on the ejection side of the original platen 2 so as to be freely protrusive and retractable, and is driven by a solenoid 41. It is now possible to do so. Further, 42 is a document receiving member that receives the document P discharged from the document table 2.

FIG. 6 schematically shows the control circuit.

That is, 51 is a main control unit that controls the whole, and this includes a storage unit 52 for storing various control data, etc.
, a drive circuit 53 for driving the motor 38, a drive circuit 54 for driving the solenoid 41, a drive circuit 56 for driving the motor 55, an interface circuit 57 for exchanging signals with the copying machine main body 1, and the detection. Switches 26 are connected respectively. The drive circuit 53 is capable of forward and reverse rotation control, and is configured to switch between forward and reverse rotation by switching the excitation phase of the motor 38. Note that the motor 55 is for rotationally driving the eccentric cam 25.

Next, the operation of the above configuration will be explained with reference to the flowchart shown in FIG.

First, by stacking a plurality of originals P and feeding them all at once into the original supply unit 5, the originals P are held on standby in a state where they are positioned on the mounting table 6 by the side regulating plates 7, 7 and the entrance stopper 18. be done. At this time, the detection switch 26
is detected, and the detection signal is sent to the main control section 51. The main control section 51 sends the detection signal to the copying machine main body 1, whereby the copying machine main body 1 knows that the document feeder 3 is to be used.

Next, when the copy key 20 is pressed, a signal to that effect is sent from the copying machine main body 1 to the main control section 51, and the main control section 51, which receives this signal, rotates the motor 55 a predetermined number of times. As a result, the eccentric cam 25 rotates and the inlet stopper 18 descends, so that the document P on the mounting table 6 falls under its own weight and slides onto the pair of take-in rollers 99. At this time, since the eccentric cam 25 rotates a predetermined number of times, the inlet stopper 18 repeats vertical movement (appearance and retraction) several times, whereby the original P is separated as shown in FIG.

Now, after stopping the motor 55, the main control section 51 confirms that the document feed signal is coming from the copying machine main body 1, and
The motor 38 is driven in forward rotation for a predetermined period of time. The power of the motor 38 is transmitted only to the intake roller pair 9, 9 during normal rotation due to the action of the one-way clutch 13, 33, and is not transmitted to the registration roller pair 27 and the conveyor belt 28. Therefore, as the motor 38 rotates in the normal direction, the original P is taken in by the pair of take-in rollers 9, 9 and abutted against the pair of registration rollers 27. After the original P hits the pair of registration rollers 27, the pair of take-in rollers 9.
By rotating 9, even if the original P enters at an angle, it can be corrected horizontally.

Next, the main control unit 51 stops the motor 38 and immediately drives the motor 38 in the reverse direction. As a result, the registration roller pair 27 and the conveyor belt 28 rotate. At this time, power is not transmitted to the pair of take-in rollers 9.9 by the action of the one-way clutch 13.33, so that the next document P is not taken in overlappingly. In addition, the main control unit 51
The solenoid 41 is driven simultaneously with or slightly earlier than the reverse rotation of the motor 38, and the outlet stopper 40 is lowered.

When the conveyor belt 28 rotates, if there is a previously copied document P on the document table 2, it is ejected to the document receiving member 42. When the previous document P is ejected, the main control unit 51 activates the solenoid 4.
1 and raise the exit stopper 40. The document P captured by the capture roller pair 9, 9 is transferred to the registration roller pair 27.
The document is sent between the conveyor belt 28 and the document table 2 by the rotation of the conveyor belt 28, and is sent by the conveyor belt 28 to the position of the exit stopper 40, that is, the exposure position, but after reaching the exposure position, the conveyor belt 28 must be further rotated a little. As a result, it is aligned and becomes horizontal. When the original P reaches the exposure position,
When this is detected by a detector (not shown), the main control section 51 stops the motor 38 and sends a signal to the copying machine main body 1 indicating that the document P is at the exposure position. As a result, the copying machine main body 1 performs a copying operation. At this time, the main control unit 51 causes the motor 55 to rotate a predetermined number of times again, and also causes the motor 38 to rotate forward, so that the next document P is sent to the registration roller pair 27 by the take-in roller pair 9, and the next document P is transferred to the registration roller pair 27. Make preparations.

Now, when the copying operation for the original P is completed, the original P is ejected and the next original P is sent to the exposure position. The above operation is repeated until there is no more original document P in original supply section 5. When the copying operation for the last original P is completed, that original P is ejected and the operation is ended.

According to the document feeding device 3 described above, the pair of take-in rollers 9.
In addition, the pair of registration rollers 27 and the feed belt 28, which are not driven at the same time, are driven by a single stepping motor 38, and their driving is switched.
Since the one-way clutch 13.33 is used to rotate the motor 38, there is no need to use dedicated motors and their drive circuits as in the past.
Only one motor and its drive circuit are required. therefore,
The motor and its drive circuit can be reduced, the configuration can be simplified, and the entire device can be made smaller and lighter without impairing its function as a document feeder.

In the embodiment described above, the power of the motor 38 is transferred to the gear 14.
34 and the one-way clutch 13. Although the transmission is transmitted to the take-in roller pair 9.9 or the registration roller pair 27 and the conveyor belt 28, the transmission mechanism is not limited thereto, and other transmission mechanisms may be used. Furthermore, the motor 38 does not necessarily have to be a stepping motor; for example, a DC motor or the like may be used. Furthermore, although the case has been described in which the present invention is implemented in a document feeding device of an electronic copying machine, the present invention is not limited thereto, and can be similarly implemented in, for example, a document feeding device such as a character reading device or a facsimile machine.

〔Effect of the invention〕

As described in detail above, according to the present invention, it is possible to provide a document feeding device in which the number of motors and their drive circuits can be reduced without impairing functionality, thereby making the entire device smaller and lighter.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a schematic perspective view, FIG. 2 is a schematic side view, FIG. 3 is a perspective view of the main parts, and FIGS. 4 and 5 are main parts. Schematic longitudinal sectional side view of the section, No. 6
The figure is a schematic block diagram of the control circuit, and FIG. 7 is a flowchart for explaining the operation. 1... Copying machine main body, 2... Original table (exposure position), 3
...Document feeder, P...Document, 5...Document supply unit, 9.9...Take-in roller pair (first conveyance means), 1
3゜33...One-way clutch, 14.34...
Gear, 27... Registration roller pair, 28... Conveyance belt (second conveyance means) 32. 36... Sprocket, 37... Chain, 38... Motor.

Claims (3)

[Claims] (1) A document supply section that supplies a document, a first conveyance means in the previous stage that takes in and conveys the document supplied from the document supply section, and this first conveyance means does not operate at the same time, and the first conveyance means a second conveying means at a later stage that receives the original conveyed by the second conveyor and sends it to a predetermined location; a single motor; the rotational force of the motor is selectively operated depending on the rotational direction of the motor; a transmission means for selectively transmitting data to a second transport means, the rotation of the motor in a first direction drives the first transport means, and the rotation of the motor in a second direction opposite to the first direction; A document feeding device characterized in that the second conveying means is driven by: (2) The document feeding device according to claim 1, wherein the predetermined portion is an exposure position of a copying machine. (3) The document feeding device according to claim 1, wherein the motor is a stepping motor.