JP2001019272A - Document feeder and image reader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the operability for initialization to a standby state for document feeding by detecting the presence or absence of documents when a power source is switched on, not executing the initializing operation of an auxiliary feeding means and a document stopper means when the document stays on a document platen, and executing the initializing operation after the document is removed. SOLUTION: In a facsimile device, a recording sheet taken out of a paper supply cassette 1a, 1b is fed to a recording system B, and discharged onto a paper discharge path by a paper discharge roller 10a after the image formation. The facsimile device is provided with a document reader, documents placed upside down on a document tray 15 are sent one by one, and an image is read out by an image line sensor 19. On this occasion, the presence or absence of the documents on the document tray 15 is detected when the power source is switched on, the initializing operation of an auxiliary feeding roller 51, a document stopper and the like is not executed when the document stays on the document tray 15, and the initializing operation is automatically executed after the document is removed in a standby state. Whereby the operability and the silence can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a document feeder and a document reader.

[0002]

2. Description of the Related Art Conventionally, as a document reading device in an image forming apparatus such as a facsimile, a device having a configuration shown in FIGS. 15 to 18 has been proposed.

FIG. 18 is an external view of a facsimile apparatus, in which an original placing section for placing an original is disposed on the right side of the upper surface, and an image reading section 3 having an openable / closable cover is disposed on the left side of the upper surface. A plurality of originals (multi-leaf originals) stacked on the original placement portion with the original surface facing down are sequentially conveyed to the contact type image sensor from the lowermost one and discharged to the original discharge tray 108. . Further, a toner image corresponding to an image signal formed by an image forming unit (not shown) is transferred to the recording paper from the paper feeding units 113, 111, and 117 on which the recording paper is stacked, and passes through a fixing device (not shown). Recording paper output tray 11
2 is discharged.

As shown in FIG. 15, the above-mentioned document reading section has various rollers and the like disposed above and below a sheet guide 102 forming a document conveying path, and a cover section 200 disposed above is attached to be openable and closable. Have been. A pickup roller 103 having a D-shaped cross section is disposed at the center in the width direction on the upstream side of the sheet guide 102 in the document conveying direction.
02 does not protrude upward. Also,
A plate-shaped weight plate 104 is swingably provided on the cover unit 200 so as to face the pickup roller 103. A lower separation roller 105 and an upper separation roller 106 for separating and conveying the multi-fed original are disposed downstream of the sheet guide 102 in the document conveyance direction following the pickup roller 103, and a lower separation roller is further downstream. A transport roller 107 and an upper transport roller 108 are disposed, and the original is placed on the original discharge tray 1.
A lower paper discharge roller 112 and an upper paper discharge roller 113 for discharging paper at 08 are arranged.

[0005] Upper separation roller 106 and upper conveyance roller 108
Is the pressure lever 109 attached to the cover 200.
, And comes into pressure contact with the lower separation roller 105 and the lower conveyance roller 107 by the spring force of the pressure spring 110. The upper discharge roller 113 is also attached to the cover unit 200, and the original can be removed from the sheet guide 102 by opening the cover unit 200.

Further, between the pickup roller 103 and the lower separation roller 105, a locking claw portion 122 of a document stopper device can protrude from the sheet guide 102, and a double leaf loaded on the document placing portion is provided. The document is pushed until the leading end of the document comes into contact with the locking claw 122 via the position where the pickup roller 103 and the weight plate 104 face each other.

The pickup roller 103, the lower separation roller 105, the lower transport roller 107, and the document stopper device are driven by a drive mechanism shown in FIG. 16 by a single motor (not shown) via a gear train. A gear of a drive shaft 115 connected to a pulse motor (not shown) meshes with a gear (a part of the second gear train G2) at one end of a separation roller shaft 105a having a lower separation roller 105 to rotate the lower separation roller 105. Let it. A gear (a part of the first gear train G1) on the other end side of the separation roller shaft 105a is a first gear train G.
The idler gear meshes with the idler gear 1 and the spring clutch 1 connected to the pickup roller 103.
It meshes with gears attached to 16 input shafts.
The spring clutch 116 is provided with a locking portion 116 of the control ring 116A.
B, the locking claw member 1 driven by the solenoid 117
When the engagement is made, a frictional force is generated, and the pickup roller 103 is rotated. The pickup roller 103 is intermittently driven to make one rotation with the position with the D-cut surface on the upper surface as a stop position, and the solenoid 117 is energized when reading of image information is started.
Power is cut off at the timing of rotation. While the pickup roller 103 makes one rotation, the leading end of the document is conveyed to the separation rollers 105 and 106,
The D-cut surface faces upward and does not protrude above the sheet guide 102, so that the conveyance of the original by the separation rollers 105 and 106 is not affected.

When the pickup roller 103 is driven, the stopper device is driven so that the locking claw 122 is retracted below the sheet guide 102, and this driving operation is performed via the second gear train G2. The driving force of the drive shaft 115 is transmitted to a one-way clutch 128 such as a spring clutch. The one-way clutch 128 in this stopper device does not transmit the rotation in the forward rotation direction but transmits the rotation in the reverse rotation direction when the direction in which the other rollers rotate for document conveyance is the forward rotation direction. It is configured as follows.

As shown in FIG. 17, a cam follower 124 of a stopper lever 121 is in contact with a cam surface of a cam member 123 which rotates integrally with a cam shaft 127. The stopper lever 121 has a locking claw at one end. A portion 122 is provided, and is rotatable around a pivot 121B on the other end side as a fulcrum. Stopper lever 121 shown in FIG.
Of the sheet guide 102 is formed by the locking claw 122 of the sheet guide 102.
When the camshaft 127 rotates in the reverse direction as shown in (2) from the state in which the double-leaf original is locked by projecting from the
Start evacuating into 2A. Then, as shown in (3), the locking portion 126 of the cam member 123 is moved to the stopper lever 121.
, The reverse rotation of the motor is stopped. This reverse rotation control of the motor is based on the standby state of (1) in FIG. 17 until the state of (3), that is, until the locking portion 126 passes through the locking portion 125 and the stopper lever 121 is fully lowered. The motor is driven by a fixed amount by pulse control, and the number of driving pulses at that time is determined by the cam member 123.
Is determined by the shape of

Thus, the locking of the double-leaf original is released, and the motor is rotated in the forward direction for conveying the original. At this time,
In the stopper device, since the locking portion 125 and the locking portion 126 are engaged, the one-way clutch 128 idles,
As shown in (4), the raising of the stopper lever 121 is continued until the conveyance of the document is completed.

Then, when the discharge of the last document is detected by the detection means (not shown) by the discharges 112 and 123, (5)
As shown in (1), the motor is reversely rotated by a predetermined number of pulses in the standby state of (1).

Here, when the stopper device is manually operated after the power of the apparatus main body is turned on or after the document is jammed, the position of the stopper lever 121 and the cam member 1 are moved.
In some cases, it is not clear what position (angle) 23 is in. In such a case, the cam member 123 is initialized. This initialization operation gives the motor the number of pulses for rotating the cam member 123 one or more rotations forward. Then, since the cam member 123 is securely locked to the locking portion 125 of the stopper lever 121, after the initialization and normal rotation operation of the motor, the position of (4) in FIG. A predetermined number of pulses in the reverse rotation direction is given. By this initialization operation, a standby state is obtained.

If the user pushes the multi-leaf original to the separation roller of the original reading device at a stretch while the original pickup roller 103 is stopped when reading the original sheet,
Since the sheets cannot be separated by the separation rollers 105 and 106, the multi-leaf original should not be pushed into the separation rollers 105 and 106 between the pickup roller (sometimes referred to as a preliminary conveyance roller) 103 and the separation rollers 105 and 106. A locking claw 122 of the document stopper device for stopping and holding is provided. When reading the original, the locking claw 122 is retracted to release the stop of the sheet, and the pickup roller 103 is rotated, whereby the original sheets are taken out one by one from the multi-leaf original, and the separation rollers 105 and 106 at the subsequent stage are taken out. And the multi-fed original sheets are surely separated by a separation roller, and the information of the original sheets is read by a contact type image sensor 111 at the subsequent stage.

[0014]

However, in the above-mentioned prior art, when reading a document sheet, the document stopper device is effective so that the multi-leaf document, which is a bundle of document sheets, cannot be pushed at a stroke to the separation rollers 105 and 106 of the document reading device. However, if there is already a document on the platen when the power is turned on, or if the document is stuck on the platen due to a jam during document reading operation or other device error,
If the rotation of the pickup roller 103 and the driving of the document stopper device are performed in this state, the document may be damaged. Therefore, it is necessary to continue the state in which the document stopper device is released.

At this time, the stopper lever 121 of the original stopper device and the pickup roller 103 are moved to a predetermined position (angle) by giving a predetermined number of pulses to the pulse motor. The position of the pickup roller 103 is not detected by the detecting means.

For this reason, the same state may continue even after the original is removed, and the double feed due to the defective position of the locking claw 122 of the original stopper device or the defective original due to the defective position of the pickup roller 103 may occur. Send
And so on.

A similar situation occurs when the operator opens the operation panel and unintentionally moves the stop position of the pickup roller 103 or the stopper lever 121 of the document stopper device. If the apparatus does not have the open / close detection means, the need to initialize the pickup roller 103 and the document stopper device cannot be determined, and the document may not be set in a standby state.

In order to cancel this state, for example, a method of removing the original and turning on the power again is conceivable. However, there is a problem that the image file inside the apparatus is lost when the power is turned off.

Further, it has been proposed to initialize the position of the document stopper device and the pickup roller 103 by pressing a stop key or the like. In this case, even when other processes are interrupted, the document stopper device, and Since the position of the pickup roller 103 is also initialized, there is a problem in operability and quietness.

An object of the invention according to the present application is to provide a document feeder and a document reading device which can further improve initialization of a document feed to a standby state.

[0021]

A first configuration of a document feeder for realizing the object of the present invention has a compound document feeder for separating a compound document placed on a document table and controlling the feed. At the start of document transport, the document stopper means for regulating the stacking position in the transport direction of the multi-leaf document is released, and the document is driven from the retracted state from the document transport path to a state in which the document can be transported, and the document is moved to a predetermined position. A document feeder having a preliminary feeding means for feeding the document to the multi-leaf document feeder at a timing, the presence / absence of a document is detected when the apparatus is turned on, and if the document is stagnant on a document table, The present invention is characterized in that an initialization operation is automatically performed after a document is removed in a standby state without performing an initialization operation of a conveyance unit and the document stopper unit.

A second configuration of a document feeder for realizing the object of the present invention is to separate a compound document placed on a platen into
A document feeder for feeding and controlling the document is provided. At the start of document feeding, the document stopper means for restricting the stacking position in the conveying direction of the document is released, and the document is fed from a state retracted from the document feed path. In a document feeder having a preliminary transport unit that is driven to a possible state and feeds the document to the double-leaf document transport unit at a predetermined timing, the presence or absence of the document is detected at the end of the document reading operation, and the document stays on the platen. If so, a warning is given, and at that time, the initialization operation of the preliminary conveyance means and the document stopper means is not performed, and the initialization operation is automatically performed after the document is removed in a standby state. It is characterized by performing.

According to a third aspect of the document transport apparatus for realizing the object of the present invention, the preliminary transport means is a roller having a flat portion which is partially cut out substantially flat in the first or second configuration. The operation of stopping the roller member at a position where the flat portion faces the document conveyance path is referred to as an initialization operation.

According to a third configuration of the document feeder for realizing the object of the present invention, in any one of the above-mentioned configurations, the double-leaf document feeder rotates the preliminary feed means by rotating a drive motor in a first rotation direction. From the separation roller, and when the document is separated from the separation roller and the conveyance is started only by the conveyance roller, the conveyance of the next document is started by the rotation of the preliminary conveyance unit. When the separation roller rotates in accordance with the document conveyed by the conveyance roller, the rotation of the preliminary conveyance means stops and is held at an initial position, and a power transmission mechanism is provided.

A fifth configuration of the document feeder for realizing the object of the present invention is the fourth configuration, wherein the power transmission mechanism is
When the drive motor rotates in a second rotation direction opposite to the first rotation direction, the rotation of the separation roller is stopped and the original stopper means and the preliminary conveyance means are moved to an initial position. .

According to a second aspect of the present invention, there is provided a document reading apparatus having a document feeder having one of the above-described structures, wherein the compound document transferring section separates the compound document and sends the document to document reading means. It is characterized by controlling.

In the document transport apparatus and the document reading apparatus having the above-described configurations, the document stopper, the document stopper, and the position detecting means of the preliminary transport unit such as the pickup roller are not required even when the power is turned on and after the document reading operation is completed. And the pickup roller are initialized, and if there is already a document on the platen when the power is turned on, or if the document is stuck on the platen due to a jam during document reading operation or other device error, the above processing is performed. The operability and quietness are improved by automatically recognizing that the stuck originals are removed and resetting the original stopper and the pickup roller and executing the processing. It is not necessary to have a document stopper, a pickup roller position detecting means, and an operation panel open / close detecting means. , Cost reduction can be achieved.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on an embodiment shown in the drawings.

FIGS. 1 to 14 and FIG. 19 show an embodiment of the present invention.

FIG. 1 is a vertical cross-sectional view of the facsimile apparatus shown in FIG. 3, FIG. 2 is a cross-sectional view showing a state where a cover of an original reading section and an ink jet type image recording section of FIG. 1 is opened, and FIG. FIG. 4 is a plan view of the sheet cassette shown in FIG. 1, and FIG. 5 is a perspective view of the image recording unit shown in FIG.

In the facsimile apparatus according to the present embodiment, paper feed cassettes 1a and 1b are arranged in two stages below the apparatus main body 7, and the stacked recording sheets are supplied to the ink jet recording system B by the paper feeding system A, respectively. The paper is discharged to the paper discharge path in the direction of arrow a by the paper discharge roller 10a and the spur 10b, and furthermore, the upper paper cassette 1 is discharged by the discharge rollers 11a and 11b.
Discharge to the outside of the upper part of a.

A paper feeding mechanism having the same configuration is disposed for the upper and lower paper feeding cassettes 1a and 1b (a is added to the upper paper feeding mechanism, and b is added to the lower paper feeding mechanism. The uppermost recording sheet 2a which comes into contact with the nail 4a of the paper feed cassette 1a is taken out by the paper feed roller 3a.
The sheet is fed to the nip between the pair of feed rollers 5a and 5b. The recording sheet 2a is sent to the recording system B by a pair of feed rollers 5a and 5b. The recording system B is configured such that a carriage 31 on which an ink head having an ink cartridge 9 is mounted is movable in a width direction (main scanning direction) with respect to a platen 30, and the recording system B moves relative to a recording sheet 2 a supported by a platen roller 8. Printing is performed. This printing is performed by the carriage 31 moving in the main scanning direction while being guided by the guide rails 34 integrally with the timing belt 31 wound around the pulley 32 that rotates forward and backward by the carriage motor 36. The ink cartridge and the like can be replaced by opening the recording cover 12.

On the other hand, the original reading device is composed of an original reading system C and an operation unit D, is arranged at the upper part of the apparatus main body 7, and feeds the original in the same direction as the mounting direction of the paper feed cassette to feed the original. Is read.

In the document conveying device of the document reading apparatus, a preliminary conveyance pressing plate 77 is arranged to face the preliminary conveyance roller 51 having a D-shaped cross section for conveying the downward multi-leaf originals placed on the document tray 15 one by one. I have.

FIG. 7 shows the configuration of the lower side of the document transport path of this document reading apparatus, and FIG. 8 shows the configuration of the upper side thereof.
FIG. 3 is a top view showing a driving mechanism of a reading unit, particularly a multi-leaf original transport unit that automatically controls separation and feeding of a multi-leaf original.

In FIG. 7, the preliminary transport roller 51 and the lower separation roller 17 are arranged in this order from upstream to downstream in the document transport direction.
a, a lower transport roller 17a and a lower discharge roller 18a are arranged, and an image line sensor 19 as a photoelectric conversion element is disposed between the lower transport roller 17a and the lower discharge roller 18a. Roller 1
7a, a lower transport roller 17a, a lower discharge roller 18a, and an image line sensor 19 are attached to the lower document frame 50, respectively.

A separation roller unit 302 including the lower separation roller 16a, a preliminary conveyance roller unit 301 including the preliminary conveyance roller 51, an A idler gear 59, and a B idler gear 60 are attached to the lower document frame 50.

In this embodiment, the discharge rollers 18a
The drive of the transport roller 17a, the separation roller 16a, and the preliminary transport roller 51 is performed by a drive motor (not shown) via a gear train shown in FIG. FIG.
FIG. 7 is a view taken in the direction of arrow F in FIG.
The gear 74 to which the discharge roller shaft of the discharge roller 18a is fixed is provided with a one-way clutch (not shown).
When rotated in the direction 4a, rotation from a motor (not shown) is transmitted to the discharge roller shaft, and the discharge roller 18a rotates in the document discharge direction, and when rotated in the opposite arrow 74b direction,
The one-way clutch is disengaged and transmission of the driving force to the discharge roller shaft is not performed.

On the other hand, the feed roller shaft of the feed roller 17a is fixed to the gear 75, and the gear 7 meshed with the gear 75
A transmission shaft 72 is fixed to 6. A transmission gear 73 is attached to the transmission shaft 72. Transmission gear 73
Is the first separation roller gear 5 of the separation roller unit 302.
5 is engaged.

The separation roller unit 302 is configured as shown in FIG. 10, and the separation roller shaft 58 has a mold portion 5 as a friction member pressed into the separation roller shaft 58.
8a, the separation roller 16a is rotatably mounted, and the separation roller spring clutch 56 is rotatably mounted. The first separation roller gear 55 connects the separation roller spring clutch 56 to the separation roller 16a. It is rotatably mounted on the separation roller shaft 58 so as to sandwich it.
The separation roller shaft 58 has a second separation roller gear 5.
7 is fixed to the side opposite to the first separation roller gear 55 so as to rotate integrally with the separation roller shaft 58.

Here, the movement of the first separation roller gear 55 to the left in FIG. 10 is restricted by a stopper (not shown), and the second separation roller gear 57 slidably contacts the separation roller 16a. In this state, the separation roller spring clutch 56 is fixed so as not to be movable in the axial direction, and is held with elastic force between the separation roller 16a and the first separation roller gear 55.

When the first separation roller gear 55 rotates in the document feeding direction which is the winding direction of the coil spring of the separation roller spring clutch 56, the diameter of the separation roller spring clutch 56 is reduced, and the separation roller shaft 58 is tightened. The rotation of the first separation roller gear 55 is transmitted to the separation roller shaft 58 via the separation roller spring clutch 56,
The separation roller shaft 58 rotates, and the second separation roller gear 57
Rotates, and the separation roller 16a rotates by the frictional force with the mold portion 53a. When the separation roller 16a is rotated in the document conveyance direction against the separation roller shaft 58 against the frictional force of the mold portion 58a, the force of the first separation roller gear 55 in the winding direction of the separation roller spring clutch 56 is reduced. Since it is released, the separation roller spring clutch 56
Is loosened and expands to its original diameter, and the transmission of driving force is cut off.

When the first separation roller gear 55 is rotated in the direction opposite to the document conveying direction which is opposite to the direction in which the coil spring of the separation roller spring clutch 56 is wound, the separation roller spring clutch 56 has a loosened diameter. In this state, the rotation of the first separation roller gear 55 is not transmitted to the separation roller shaft 58.

The first separation roller gear 55 and the second separation roller gear 57 of the separation roller unit are connected via the A idler gear 59 and the B idler gear 60 to the first preliminary conveyance roller gear 52a of the preliminary conveyance roller unit 301 and the second separation roller gear. It is connected to the preliminary transport roller gear 52b.

As shown in FIG. 9, in the preliminary transport roller unit 301, a first preliminary transport roller gear 52a is fixed to the clutch shaft 52, and a second preliminary transport roller gear 53b is fixed to the preliminary transport roller shaft 53. . As shown in FIG. 9C, the preliminary transport roller 51 has a substantially D-shaped cross section, and the preliminary transport roller shaft 53 extends therethrough. The first preliminary conveyance roller gear 5 is provided on the clutch shaft 52.
In addition to 2a, a large-diameter shaft portion 52b with a flange to which a spring clutch 54 for the preliminary transport roller is loosely fitted is formed, and a small-diameter shaft portion 52c is rotatably inserted into a shaft hole of the preliminary transport roller shaft 53. It is elastically mounted between the flange of the large-diameter shaft portion 52b and the end surface of the tip shaft portion 53d of the preliminary conveyance roller shaft 53.

As shown in FIG. 9C, the shaft hole of the preliminary transport roller 51 is formed by connecting a groove to a hole on a cylinder, and a key (not shown) of the preliminary transport roller shaft 53 is used. By engaging with the groove portion, the leading end shaft portion 5 of the preliminary transport roller shaft 53 with respect to the D-cut surface 51a of the preliminary transport roller 51
The notch 53a formed in 3d is set to have a predetermined phase.

As shown in FIG. 9B, the pre-conveyance roller spring clutch 54 is formed so as to have a predetermined phase difference between the inner bending projection 54a and the outward bending portion 54b of the coil spring at both ends. Then, the inner bent portion 54a on one end side engages with the notch 53a of the front end portion 53d of the preliminary transport roller shaft 53 to rotate integrally with the preliminary transport roller shaft 53.

The constricted portion 5 of the preliminary transport roller shaft 53
As shown in FIG. 14, a flat surface portion 53 e is formed in 3 c, and the D cut surface 51 a of the preliminary conveyance roller 51 is raised in a state where the flat surface portion 53 e is in contact with the contact portion 79 a of the stop spring 79. (Hereinafter referred to as the K direction), and the preliminary transport roller 5 is moved from the original transport path.
1 does not protrude.

In the preliminary transport roller unit 301,
When the clutch shaft 52 rotates in the direction opposite to the document transport direction (the direction of arrow 9d), the spring clutch 54 for the preliminary transport roller
Is tightened to reduce the diameter, and is fastened to the large-diameter shaft portion 52b, and the preliminary transport roller shaft 53 is driven via the preliminary transport roller spring clutch 54, so that the preliminary transport roller 51
Rotates in the direction opposite to the document transport direction. When the rotation in the direction opposite to the document conveyance direction is transmitted from the transmission shaft 73 to the first preliminary conveyance roller gear 52a, the first separation roller gear 55 idles and the separation roller shaft 58 is free.
The preliminary transport roller 51 can rotate in the direction opposite to the document transport direction together with the preliminary transport roller shaft 53 via the preliminary transport roller spring clutch 54.

When the pre-conveyance roller spring clutch 54 rotates in the direction opposite to the document conveyance direction, the outwardly bent portion 54b of the pre-conveyance roller spring clutch 54 abuts on the pendulum 80, as shown in FIG. The pendulum 80 abuts on the rib 50a of the lower document frame 50 and cannot be rotated. As a result, the spring clutch 54 is loosened when the outwardly bent portion 54b of the spring clutch 54 abuts on the pendulum 80, so that the drive between the clutch shaft 52 and the preliminary transport roller shaft 53 is cut off. Is stationary.

At this time, since the outwardly bent and raised portion 54b of the spring clutch 54 has a constant phase relationship with the preliminary transport roller 51 as shown in FIG. 9, the D-cut surface 51a of the preliminary transport roller 51 must be in the K direction. become.

At this time, since the flat surface portion 53e of the preliminary transport roller shaft 53 and the stop spring 79 are engaged with each other, the phases of the outwardly bent and raised portion 54b of the spring clutch 54 and the D-cut surface 51a of the preliminary transport roller 51 are different in manufacturing. The preliminary transport roller 51 can be stopped in the direction of K even if it is slightly displaced due to the accuracy of (1).

Thus, the next time a document is inserted, the preliminary transport roller 51 and the preliminary transport pressing plate 77 are opened, so that the original is not caught and the stopper 6 is smoothly moved.
8 can be reached.

Next, FIG. 8 will be described. A separation piece 16b paired with the separation roller 16a and a separation spring 16c pressing the separation piece 16b against the separation roller 16a are attached to the shaft support of the upper document frame 61.

When a document is inserted, the document is pushed by the document and oscillates, and a DS actuator 69 for blocking the detection optical path of the photo-interrupter, and a DES actuator configured similarly to the DS actuator 69 for detecting the timing of starting reading. 70 is supported by the upper document frame 61. The photo-interrupter, whose detection optical path is blocked by each of the actuators, is mounted on an operation unit (not shown) or on the back surface of a substrate of an operation panel, and is configured to function when the operation panel is attached.

The transport roller 17b facing the transport roller 17a is supported by the upper document frame 61 through a transport roller shaft 65a. Similarly, the short transport roller 66 and the stopper roller 67 are also supported by the upper document frame 61 through the transport roller shaft 65a.

The stopper 68 is rotatably supported by the upper document frame 61, and is configured to contact the stopper roller 67 during rotation. The discharge roller 18b facing the discharge roller 18a is supported by the upper document frame 61 through a discharge roller shaft 63a.

The shaft pressing springs 62a and 62b are arranged so as to straddle between the transport roller shaft 65a and the discharge roller shaft 63a, and the spring pieces at both ends are connected to the transport roller shafts 65a and 63a.
, And are always pressed by the spring force of these springs, and the biaxial pressing springs 62 a and 62 b are fixed between the upper document frame 61 and the upper document stay 71.

Next, the actual movement will be described. FIG.
As shown in (a), when a plurality of originals are inserted in the G direction, the DS actuator 69 is turned on. further,
When the original is inserted, the leading end of the original abuts against the stopper member 68. After that, when a copy or transmission instruction is given on the operation panel, the transport roller 17a is moved by an arrow H.
The stopper roller 67 facing in the direction J turns in the arrow J direction.

The cam surface 67a of the stopper roller 67 contacts the lever 68a of the stopper 68 to push up the stopper 68. At the same time, the preliminary transport roller 51 and the lower separation roller 16a rotate in the H direction.

As a result, the original pressed against the preliminary transport roller 51 and the preliminary transport pressing plate 77 is
The sheet is sent between the separation roller 16a and the separation piece 16b, separated one by one, and sent to the conveyance roller 17a. At this time, the feed speed of the separation roller 16a is set to be lower than the feed speed of the transport roller 17a.

That is, the original document sent to the separation roller 16a by rotating the preliminary transport roller 51 in the document transport direction is further sent to the transport roller 17a. Document is transport roller 1
7a, the document conveying speed is increased, and the separation roller 16a starts rotating at the increased speed. As described above, the separation roller spring clutch 56 is loosened, and the rotation of the first separation roller gear 55 is changed to the separation roller 16a. It is not transmitted to the shaft 58. Therefore, the second separation roller gear 57,
The second preliminary transport roller gear 5 via the B idler gear 60
The rotation is not transmitted to 3b, and the preliminary transport roller 51 enters a non-rotational rotation stop state.

However, when the document passes the separation roller 16a, the separation roller spring clutch 56 functions again,
The separation roller shaft 58 starts rotating, the second preliminary roller gear 53b rotates via the second separation roller gear 57 and the B idler gear 60, and the document is transported toward the separation roller by the rotation of the preliminary roller 51. become.

When the rotation of the preliminary conveyance roller is interrupted, since the separation roller spring clutch 56 is in a loose state, the driving force is hardly transmitted to the second separation roller gear 57, but a slight idling torque is generated. Therefore, the preliminary transport roller 51 rotates.

At this time, as shown in FIGS. 14 and 7,
The stop spring 79 is used for the flat surface portion 5 of the preliminary transport roller shaft 53.
When it comes into contact with 3e, it becomes a resistance in the rotation direction, and the preliminary transport roller 51 stops with the D-cut surface 51a facing in the direction of K.

When the original is being conveyed to the conveying roller 17a, the D-cut surface 51a of the preliminary conveying roller 51 always faces in the direction without protrusion in the K direction. The gap between the pressing plates 77 is opened, so that the original is not pulled later, and the original can be smoothly conveyed without obstruction such as elongation of the image.

Thereafter, when the DES actuator 70 detects the original, the photoelectric conversion element 19 reads the image information. Then, the sheet is discharged by the discharge roller 18a. Thereafter, if the DS actuator 69 detects a document, the document is similarly separated and read.

If the DS actuator 69 has not detected the original and the DES actuator 70 has detected the original and it has been determined that all originals have been read after a certain amount of original feeding has been completed, then an initialization operation is performed.

The initialization is performed by reversing the drive motor. When the drive motor is reversed, as shown in FIG. 1, the first separation roller gear 55 rotates in the direction of the arrow 55a, so that the drive of the separation roller spring clutch 56 is cut off as described above. The first preliminary transport roller gear 52a is transmitted to the first preliminary transport roller gear 52a through
It rotates in the direction of arrow 9d, and as described above, the drive is transmitted to the preliminary transport roller shaft 53 via the preliminary transport spring clutch 54, and the preliminary transport roller 51 rotates in the reverse direction.

When the pre-conveyance roller 51 starts to rotate in the reverse direction, the outwardly bent portion 54b of the pre-conveyance roller spring clutch 54 abuts on the pendulum 80 as shown in FIG. Since it hits the rib 50a, it cannot be rotated. As a result, the spring clutch 54 is loosened when the outwardly bent portion 54b of the spring clutch 54 abuts on the pendulum 80, so that the drive between the clutch shaft 52 and the preliminary transport roller shaft 53 is cut off. Is stationary.

At this time, since the outwardly bent and raised portion 54b of the spring clutch 54 has a constant phase relationship with the preliminary transport roller 51 as shown in FIG. 9, the D-cut surface 51a of the preliminary transport roller 51 must be in the K direction. become.

At this time, since the flat surface portion 53e of the preliminary transport roller shaft 53 and the stop spring 79 engage with each other, the phases of the outwardly bent and raised portion 54b of the spring clutch 54 and the D-cut surface 51a of the preliminary transport roller 51 are different in manufacturing. The preliminary transport roller 51 can be stopped in the direction of K even if it is slightly displaced due to the accuracy of (1). In addition, (b) of FIG. 11, (c)
Are the outwardly bent and raised portions 54b of the spring clutch 54 and the pendulum 80 when the preliminary transport roller rotates in the document transport direction.
Is shown together with the direction of the D-cut surface 51a.

Thus, the next time a document is inserted, the preliminary transport roller 51 and the preliminary transport pressing plate 77 are opened, so that the original is not caught and the stopper 6 is smoothly moved.
8 can be reached.

As shown in FIG. 13B, when the drive motor rotates in the reverse direction, the lower transport roller 17a
The stopper roller 67 rotates in the direction of arrow P. Then, it strikes against the lever portion 68a of the stopper 68,
Since the stopper 68 does not rotate in this direction, the stopper roller 67 stops, and the transport roller 17a and the stopper roller 67 slip. Thereby, the stopper 6
Numeral 8 is always held down, and is located at a position to block the document conveyance path when a document is inserted, so that the document is not forced into the separation unit.

FIG. 6 is a block diagram showing the configuration of a facsimile communication apparatus to which the present invention is applied.
Is composed of a microprocessor element or the like, and controls the entire apparatus according to a program stored in the ROM 7.

The memory (RAM) 4 is used for storing various constants input by the operator from the operation unit 3 and for storing variables used when the control unit 1 performs various processes, and also for reading and recording image data. It is also used to store data, etc., and reads and writes as necessary. Display 8
Displays guidance for operations such as registration, various warnings, and the status of the apparatus such as time.

The reading section 2 is for reading an original. The reading section 2 includes a scanner for scanning line by line, a multi-leaf original transport section for automatically controlling the separation and feeding of a multi-leaf original, and the recording section 5 includes an image signal and an image signal. Prints out various reports such as device constants. The communication unit 6 includes a modem, an NCU (network control device), and the like, and is connected to a communication network to exchange communication data.

Hereinafter, details of the processing will be described in accordance with the flowchart of FIG.

When the power is turned on, a standby process is performed,
In step (hereinafter abbreviated as S) 1, various initializations for performing communication, recording, and reading processes are performed.

S2: Check whether there is no original on the original platen. If there is an original, go to S4, otherwise go to S3.

S3: reading control unit, in particular, separation of multi-leaf originals
Initialize a multi-leaf original transport unit that automatically performs feed control.

S4: When it is confirmed that the original is staying on the original table before the initialization, the preliminary transport roller 51 and the original stopper 68 are initialized in that state (the D-cut surface 51a of the preliminary transport roller 51). (The document stopper 68 is set at the document stop position), a warning that the document is stagnating is given on the display unit 8 as a warning unit, and the initialization is performed. At this point, the fact that the preliminary transport roller and the document stopper could not be initialized is stored. At this point, initialization is not performed, and the process proceeds to the standby state of S12.

S12: When the original is removed in various standby states, the preliminary transport rollers and the original stopper are initialized at that time.

At the time of reading and transporting the original, in S5, various devices, memory, processing work, guidance display, etc. are initialized in S5. In the case of a multi-leaf original, the original is separated and the original is transported. Then, the reading device is driven to sequentially read the image (S6).

At this time, the processing is performed while the document remains on the document table due to any one of the interruption processing of the operator due to the pressing of the stop key or the like, the system interruption processing due to the insufficient remaining amount of the image memory, and the interruption processing due to the document jam or the like. Is interrupted (S7), the fact that the preliminary transport roller and the document stopper could not be initialized at this time is stored (S11), and when the document was removed in the standby state, the preliminary transport roller 51, Then, the document stopper 68 is initialized.

This monitoring process is performed at all timings during document reading (S8), and from conveyance to the document reading position to discharge, including the time between documents (S9). When there is no halfway interruption processing and the reading of the last original has been completed normally, the preliminary transport roller and the original stopper are initialized (S10), and the process returns to the standby state.

In the standby state, a general standby process is performed (S12), and a flag is monitored to determine whether it is necessary to initialize the preliminary transport roller and the document stopper (S12).
13) If there is no need to perform initialization, normal standby processing is continued. If initialization is necessary, it is confirmed that there is no original on the original platen (S14), and the preliminary transport roller and the original stopper are initialized (S15).

As described above, according to the present invention, for example, the apparatus has a multi-leaf original transport section for automatically controlling the separation and feeding of a multi-leaf original, and when reading the original sheets, the sheet bundle is separated by the separation roller of the original reading apparatus. In a facsimile machine that needs to initialize the stopper and the preliminary transport roller so that the printer cannot be pushed all at once, various initializations for communication, recording, and reading are performed at power-on, along with standby processing. Before initializing the reading control unit, especially the multi-leaf original transport unit that automatically performs the separation and feeding control of the multi-leaf original, make sure that there is no original on the platen before processing. When it is confirmed that the document is staying on the platen, the preliminary transport roller and the original stopper are not initialized in this state, and the preliminary transport roller and the original stopper are not initialized at the time of initialization. The fact that the document stopper could not be initialized is memorized, and when the document is removed in the standby state, the preliminary transport rollers and the document stopper are automatically initialized, thereby improving operability and quietness. And it is not necessary to separately provide a preliminary conveyance roller and a document stopper position detecting unit, thereby realizing cost reduction.

[0089]

As described above, according to the document conveying apparatus and the document reading apparatus of the present invention, when reading the multi-leaf original sheet, the sheet bundle of the multi-leaf original cannot be pushed at once to the separation roller portion of the multi-leaf original conveying section. For example, in a facsimile apparatus in which it is necessary to initialize the original stopper means and the preliminary transport means such as the preliminary transport roller, when power is turned on, various initializations for performing communication, recording, and reading processing as well as standby processing. Before initializing the reading control unit, especially the multi-leaf original transport unit that automatically controls the separation and feeding of the multi-leaf original, make sure that there is no original on the platen before processing. Before performing the operation, confirm that the original is stagnant on the platen.In this state, the preliminary transport rollers and the original stopper are not initialized. The fact that the rollers and the document stopper could not be initialized is memorized, and when the document is removed in the standby state, the preliminary transport rollers and the document stopper are automatically initialized, so that operability, In addition to improving quietness, it is no longer necessary to have separate auxiliary transport rollers and document stopper position detection means.
Cost reduction can be realized.

[Brief description of the drawings]

FIG. 1 is a central sectional view of a facsimile apparatus showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the device of FIG. 1 with a cover released.

FIG. 3 is an external perspective view of the facsimile apparatus of FIG.

FIG. 4 is a plan view of the sheet cassette shown in FIG. 1;

FIG. 5 is a perspective view of a recording unit of the facsimile apparatus of FIG.

FIG. 6 is a block diagram of the facsimile apparatus of FIG. 1;

FIG. 7 is a plan view of a lower original frame unit of the facsimile apparatus of FIG. 1;

FIG. 8 is a plan view of an upper document frame unit of the facsimile apparatus of FIG. 1;

9A is a configuration diagram of the preliminary transport roller unit of FIG. 7, FIG. 9B is a view as viewed from an arrow 9a, FIG. 9C is a view as viewed from an arrow 9b, and FIG.
Sectional drawing along line c-9c.

FIG. 10 is a configuration diagram of a separation roller unit of FIG.

11 (a) to (c) are explanatory views of the movement of the spring clutch of FIG. 9;

FIG. 12 is a view as seen in the direction of arrow F in FIG. 7;

FIGS. 13A and 13B are diagrams illustrating the operation of a document stopper of the apparatus of FIG. 1;

FIG. 14 is a configuration diagram of a stop spring of the preliminary transport roller unit of FIG. 9;

FIG. 15 is a central sectional view of a conventional facsimile machine.

FIG. 16 is a plan view of FIG. 15;

17 (1) to (5) are explanatory views of the stopper operation of FIG.

18 is an external view of the facsimile apparatus shown in FIG.

FIG. 19 is a flowchart of the embodiment.

[Explanation of symbols]

 A paper feed system B recording system B1 CPU C reading system D operation unit 1, 1a, 1b paper feed cassette 2, 2a, 2b recording sheet 3, 3a, 3b feed roller 4, 4a, 4b nail 5a, 5b, 5c, 5d Feed roller 6 Tip sensor 7 Main body 8a, 108a Platen roller 8b, 108b Roller 9, 109 Ink cartridge 10a Discharge roller 10b Spur 11a, 11b Discharge roller 12 Recording cover 13 Document 15 Document tray 16a Separation roller 16b Pressure contact piece 17a, 17b Conveyance roller 18a Discharge roller 19 Photoelectric conversion element (CS) 30 Platen 31 Carriage 32 Pulley 33 Timing belt 34 Guide rail 50 Lower document frame 51 Preliminary conveyance roller 52 Clutch shaft 53 Preliminary conveyance roller shaft 54 Spring clutch 67 Stopper roller 6 In stop 79 stopper spring 80 pendulum 6, 1 controller 2 reading unit 3 operating section 4 Memory 5 recording unit 6 communication unit 7 ROM 8 display unit

Claims (6)

[Claims] An original having a multi-leaf original transport section for separating and feeding a multi-leaf original placed on an original table, and for controlling a stacking position in the transport direction of the double-leaf original at the start of the original transport. A document feeder having a preliminary transporter that releases the stopper means and is driven to a state in which the document can be transported from a state retracted from the document transport path to feed the document to the double leaf document transporter at a predetermined timing. When the power is turned on, the presence or absence of the original is detected, and if the original is stagnant on the original platen, the preliminary transport unit and the original stopper unit are not initialized at that time, and the original is removed in a standby state. A document conveying device that automatically performs an initialization operation after the document is fed. 2. A multi-leaf original transport unit for separating a double-leaf original placed on a platen and feeding and controlling the original, and restricting a stacking position in the transport direction of the double-leaf original at the start of the original transport. A document feeder having a document feeder that releases the document stopper means and is driven to a state in which the document can be conveyed from a state retracted from the document feed path and feeds the document to the multi-leaf document feeder at a predetermined timing. At the end of the original reading operation, the presence or absence of the original is detected, and if the original is stagnant on the original platen, a warning is issued, and at this time, the preliminary transport unit and the original stopper unit are not initialized. A document conveying apparatus which automatically performs an initialization operation after a document is removed in a standby state. 3. The pre-conveying means is a roller member having a flat portion partially cut out substantially flat, and performs an operation of stopping the roller member at a position where the flat portion faces a document conveying path. 3. The document transport device according to claim 1, wherein the document transport device performs an initialization operation. 4. The multi-leaf original transport section has a transport roller that transports an original that has passed through a separation roller from the preliminary transport means by rotation of a drive motor in a first rotation direction, and the original is separated from the separation roller. When the conveyance is started only by the conveyance roller, the conveyance of the next document is started by the rotation of the pre-conveyance means, and the pre-conveyance is performed when the separation roller rotates following the document conveyed by the conveyance roller. 4. The document conveying apparatus according to claim 1, further comprising a power transmission mechanism in which rotation of the means is stopped and the power transmission mechanism is held at an initial position. 5. The power transmission mechanism stops rotation of the separation roller when the driving motor rotates in a second rotation direction opposite to the first rotation direction, and stops the document stopper means and the preliminary conveyance means. 5. The document conveying apparatus according to claim 4, wherein the document is moved to an initial position. 6. The document transport device according to claim 1, wherein the double leaf document transport unit separates the double leaf document and controls the document feed to a document reading unit. Original document reading device.