JP2001019272A5 - - Google Patents

Description

[Claims]
1. A document having a biplane document transporting unit that separates a biplane document placed on a platen and controls feeding, and regulates a loading position in the transport direction of the biplane document at the start of document transfer. In a document transporting apparatus having a preliminary transporting means for releasing the stopper means and driving the document from a state of being retracted from the document transporting path to a state in which the document can be transported and sending the document to the biplane document transporting unit at a predetermined timing.On the platenWhen the presence or absence of a document is detected and the document is retained on the platen, the preliminary transport means and the document stopper means are not initialized at that time, and the document is waited to be removed in the standby state. A document transfer device characterized by automatically performing an initialization operation.
2. The document transfer device according to claim 1, wherein the presence or absence of a document on the document table is detected when the power of the document transfer device is turned on or when the document reading operation is completed.
3. The preliminary transport means is a roller member having a flat portion cut out substantially flat, and operates to stop the roller member at a position where the flat portion faces the document transport path. The document transporting apparatus according to claim 1 or 2, wherein the initialization operation is performed.
4. The compound leaf document transporting unit has a transport roller that transports a document that has passed through a separation roller from the preliminary transport means by rotating the drive motor in the first rotation direction, and the document is separated from the separation roller. When the transfer is started only by the transfer roller, the transfer of the next document is started by the rotation of the preliminary transfer means.LetWhen the separation roller rotates in accordance with the document conveyed by the transfer roller, the preliminary transfer means rotates.ToStopLet meHold in initial positionTo doPower transmission mechanismHaveThe document transporting apparatus according to claim 1, 2 or 3.
5. The power transmission mechanism cuts off the rotation of the separation roller when the drive motor rotates in a second rotation direction opposite to the first rotation direction, and the document stopper means and the preliminary transport means. The document transporting apparatus according to claim 4, wherein the original position is moved to an initial position.
6. The document transporting device according to claim 1, 2, 3, 4 or 5, wherein the biplane document transporting unit separates the biplane document and reads the document.ToDocument feed controlI doA document reader characterized by this.

FIG. 18 is an external view of the facsimile machine, in which a document placing section for placing a document is arranged on the right side of the upper surface, and an image reading section 103 having a cover that can be opened and closed is arranged on the left side of the upper surface. A plurality of originals (biplane originals) loaded on the mounting portion with the original side facing downward are sequentially conveyed from the lowest layer to the close contact type image sensor and discharged to the original output tray 108. Further, on the recording paper from the paper feed units 113, 111, 117 on which the recording paper is loaded, the toner image corresponding to the image signal formed by the image forming unit (not shown) is transferred, and the toner image is transferred through the fixing device (not shown). The paper is ejected to the recording paper ejection tray 112.

The upper separation roller 106 and the upper transfer roller 108 are attached to a pressure lever 109 attached to the cover portion 200, and are in pressure contact with the lower separation roller 105 and the lower transfer roller 107 by the spring force of the pressure spring 110, respectively. It has become like. Further, the upper paper ejection roller 113 is also attached to the cover portion 200, and the original can be removed from the sheet guide 102 by opening the cover portion 200.

Here, when the stopper device is manually moved after the power of the apparatus main body is turned on or the document is jammed, it is unclear what position (angle) the stopper lever 121 and the cam member 123 are. May become. 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 in the forward rotation by one or more rotations. Then, the locking portion 126 of the cam member 123 is securely locked to the locking portion 125 of the stopper lever 121. Therefore, after the initialization forward rotation operation of the motor, the position of (4) in FIG. Gives a predetermined number of pulses in the direction of reverse rotation to the position. By this initialization operation, a standby state is obtained.

0021.
[Means for solving problems]
The first configuration of the document transporting device that realizes the object of the present invention includes a biplane document transporting unit that separates a biplane document placed on a platen and controls feeding, and the biplane at the start of document transport. The document stopper means that regulates the loading position in the document transport direction is released, and the document is driven from the state of being retracted from the document transfer path to a state in which the document can be transported, and the document is fed to the biplane document transfer unit at a predetermined timing. in the document conveying device having a pre-transfer means, to detect the presence of a document on the document table, when the document is retained on the platen, the initial of the preliminary conveying means and the document stopper means at that time The feature is that the initialization operation is automatically performed after waiting for the original to be removed in the standby state without performing the conversion operation.

A second configuration of the document transporting device that realizes the object of the present invention is characterized in that the presence or absence of a document on the document table is detected when the power of the document transporting device is turned on or when the document reading operation is completed. ..

The third configuration of the document transfer device that realizes the object of the present invention is that in any of the above configurations, the compound leaf document transfer unit is separated from the preliminary transfer means by rotation of the drive motor in the first rotation direction. It has a conveying roller for conveying the document through, when the conveyor only in the conveying roller document away from said separating roller is started, to start the conveyance of the next document in the rotation of the preliminary conveying means, said conveying It is characterized by having a power transmission mechanism that stops the rotation of the preliminary transport means and holds it in the initial position when the separation roller rotates in accordance with the document transported by the rollers.

Structure of the document reading apparatus for realizing the object of the present invention has a document feeder of the above either configuration, the Bi document feeder includes a document feeding control to the separate the biplane document original reading means It is characterized by doing.

Paper feed mechanisms having the same configuration are arranged for the upper and lower paper feed cassettes 1a and 1b (a is attached to the upper paper feed mechanism and b is attached to the lower paper feed mechanism, respectively). ), The recording sheet 2a at the uppermost position in contact with the claw 4a of the paper feed cassette 1a is taken out by the paper feed roller 3a and sent to the nip portions of 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 so that the carriage 31 equipped with the ink head having the ink cartridge 9 in the width direction (main scanning direction) with respect to the platen 30 is movable, and is supported by the platen roller 8 with respect to the recording sheet 2a. Printing is performed. This printing is performed by moving the carriage 31 in the main scanning direction while being guided by the guide rail 34 together with the timing belt 33 wound around the pulley 32 that reverses forward by the carriage motor 36. The ink cartridge and the like can be replaced by opening the recording cover 12.

In FIG. 7, a preliminary transfer roller 51, a lower separation roller 16a , a lower transfer roller 17a, and a lower discharge roller 18a are arranged in this order from the upstream side to the downstream side in the document transfer direction, and between the lower transfer roller 17a and the lower discharge roller 18a. An image line sensor 19 as a photoelectric conversion element is arranged in the lower document frame 50, and the preliminary transfer roller 51, the lower separation roller 16a , the lower transfer roller 17a, the lower discharge roller 18a, and the image line sensor 19 are attached to the lower document frame 50, respectively. There is.

When the spring clutch 54 for the preliminary transfer roller rotates in the direction opposite to the document transfer direction, the outward bending raising portion 54b of the preliminary transfer roller spring clutch 54 abuts on the pendulum 80, and the pendulum 80 Since it hits the rib 50a of the lower document frame 50, it cannot rotate. As a result, the spring clutch 54 loosens when the outward bending raising portion 54b of the spring clutch 54 abuts against the pendulum 80, so that the drive between the clutch shaft 52 and the preliminary transfer roller shaft 53 is cut off. Stand still.