KR20000032746A - Apparatus and method for transferring document for scanner - Google Patents

Abstract

PURPOSE: An apparatus and method for transferring document for a scanner are provided so that when a document scanning having a high quality is required, a resolution can be progressed by make the document isolate from a transfer path. CONSTITUTION: An apparatus and method for transferring document for a scanner includes a feeding roller (4) for automatically feeding documents continuously and a feeding rubber (5). Transfer rollers (6,7) transfers the document fed from the feeding roller to a unit, a white roller (9) is mounted in face of a scanning unit (8). Badge rollers (10,11) ejects the scanned document from the scanning unit (8) into the badge plate (3). A control lever (4a) is mounted to both ends of the feeding roller (4), an escape hole (14) being inserted the control lever (4a) is formed both sides of the scanner body (1). Since both ends of the feeding roller (4) is always supported elastically toward contacting with the feeding rubber (5), as usual, in the state that the feeding roller (4) is adhered closely with the feeding rubber (5), the control lever (4a) is hooked at the upper end of a vertical hole (14a), in case the feeding roller (4) and the feeding rubber (5) are isolated with each other, the control lever (4a) is moved to a horizontal hole (14b).

Description

Scanner Document Feeder and Method

The present invention relates to an apparatus and a method for transferring a document of a scanner, and more particularly, to an apparatus and a method for transferring a document, which is capable of feeding paper directly to the scanning unit by releasing the automatic feed roller from the document feed path when scanning a single document. will be.

The automatic document feeder of a typical scanner, as shown in FIG. 1, is provided with a tray 2 at the rear of the scanner main body 1, and a discharge tray 3 at the front thereof. In the following, scanning of the document feeder 4 for the ADF (Auto Document Feeder) and the feed rubber 5 for continuous feeding of the document P placed on the feeder 3, and the document fed from the feed roller 4 Feed rollers (6) (7) for feeding to the unit (8), white rollers (9) installed so as to correspond to the scanning unit (8), and originals scanned by the scanning unit (8) toward the discharge tray (3). The discharge rollers 10 and 11 are discharged.

In the scanner to which the ADF configured as described above is applied, a plurality of originals P loaded on the tray 2 are sequentially fed by the feed rollers 4 so that the feed rollers 6 and 7 move toward the scanning unit 8. The document is scanned accordingly, and the scanned documents are sequentially stacked on the discharge table 3 by the discharge rollers 10 and 11.

In the conventional document feeder, as shown in FIG. 2, in order to perform the automatic paper feed function, the paper feed roller 4 protrudes so as to be in close contact with the paper feeder 5 on the feed path of the original.

As such, the paper feeder 5 and the paper feed roller 4 must be kept in close contact with each other to continuously and smoothly feed the original.

However, as described above, when the original is supplied, the original is fed in a state in which the original is in close contact with the feeding rubber 5 by the feeding roller 4, so that a scratch occurs in the original during the feeding of the original, There was a problem such as bending.

Therefore, there is a defect that the image quality is degraded when performing a high quality scanning operation.

Reference numeral 12 denotes a document detection sensor, and 13 denotes a scan position sensor.

An object of the present invention devised in view of such a problem is to improve the image quality by separating the paper feed roller from the document feed path when performing a high quality scanning operation.

1 is a cross-sectional view of a conventional scanner.

2 is a schematic configuration diagram of a document transfer path of a conventional scanner.

3 is a cross-sectional view of the scanner of the present invention.

Figure 4 is a schematic configuration diagram on a document feed path of the scanner of the present invention.

5 is a flowchart showing a document transfer operation of a scanner according to the present invention;

(Explanation of symbols for the main parts of the drawing)

One ; Scanner body 2; Feeder

3; Discharge zone 4; Feed Roller

5; Feeding rubber 6,7; Feed roller

8 ; Scanning unit 9; White roller

10,11; Medium roller 12; Original Detection Sensor

13; Scan position sensor 14; Escape

14a; Vertical hole 14b; Horizontal ball

15; Elastic spring

The document feeder of the scanner for achieving the object of the present invention as described above, the feed roller and the feed rubber for automatically feeding the continuous feed, the feed roller for transferring the document fed from the feed roller to the scanning unit, the scanning unit In the document feeder of the scanner consisting of a white roller is installed so as to correspond to the discharge roller, and the discharge roller for discharging the document scanned by the scanning unit to the discharge side, the moving means for separating or returning the feed roller on the transfer path of the original; It is characterized by including the configuration.

The moving means is provided with an adjustment lever coupled to both ends of the feed roller, the escape lever is escaped when the feed roller is separated from the feed path of the document, the feed roller feed rollers on both sides of the feed roller It is preferable that the elastic member is provided so that it rests so as to return to the conveying path side of the document.

In addition, the document feed method applied to the document feeder of the scanner of the present invention comprises the steps of: automatically feeding the loaded document of the feeder by the feed roller; transferring the document fed from the feed roller to the scanning unit; In the document transporting method of a scanner performed by ejecting a document scanned by a scanning unit toward the output side, when feeding a plurality of documents from the tray, the feed roller is placed on the feed path of the document and automatically fed. In the case of scanning a single document, the paper feed roller is separated from the feed path of the original so that the original can be directly inserted into the scanning unit.

Hereinafter, preferred embodiments of the present invention as described above will be described in more detail with reference to the accompanying drawings.

FIG. 3 is a cross-sectional view of the scanner of the present invention, FIG. 4 is a schematic configuration diagram of a document transfer path of the scanner of the present invention, and FIG. 5 is a flowchart showing the document transfer operation of the scanner according to the present invention.

As shown in the drawing, the scanner to which the embodiment of the present invention is applied is provided with a tray 2 at the rear of the scanner main body 1, a discharge tray 3 is installed at the front, and Feed rollers (4) and feed rubbers (5) for continuously feeding the originals (P) to be placed, and feed rollers (6) (7) for feeding the documents fed from the feed rollers (4) to the scanning unit (8). And a white roller 9 installed to correspond to the scanning unit 8, and discharge rollers 10 and 11 for discharging the originals scanned by the scanning unit 8 to the discharge tray 2 side. Is the same as

The adjustment levers 4a are provided at both ends of the paper feed roller 4, and the coating holes 14 into which the adjustment levers 4a are fitted are formed on both sides of the scanner main body 1. As shown in FIG.

The evacuation hole 14 is formed in an L-shape so that the vertical roller 14a is formed in a direction in which the paper feed roller 4 is in close contact with the paper feeder 5, and a horizontal hole is formed to communicate perpendicularly to the vertical hole 14a. 14b).

Both ends of the paper feed roller 4 are always supported by the elastic spring 15 in a direction in which the paper feed roller 5 is in close contact with the paper feed roller 5, so that the feed roller 4 is in close contact with the paper feeder 5 at all times. ) Is in a state of being hung on the upper end of the vertical hole (14a), and when the feed roller 4 is spaced apart from the feed rubber (5) to move the adjustment lever (4a) to the horizontal hole (14b).

The operation of the present invention configured as described above will be described with reference to the flowchart of FIG. 5.

When the printer is driven, first check whether or not to scan a plurality of originals, and when using the ADF function to supply a plurality of originals continuously, the document feeder is fed by the document detection sensor 12. If the original is located on the tray after detecting the position in (2), the feed roller 4 is driven to feed the original normally through the document feed path.

The document fed in this way is detected by the scanning position sensor 13, and scanning is performed while passing through the scanning unit 8 by the feed rollers 6, 7 and the white roller 9, and scanning is performed. Completed originals are discharged to the discharge stage 2 by the discharge rollers 10 and 11 to be sequentially stacked.

On the other hand, when a plurality of originals are not fed and a high quality scan is required, the document detection sensor 12 is stopped to move the position of the paper feed roller 4.

The feed roller 4 adjusts the position by using the adjustment levers 4a provided at both ends of the feed roller 4, and pulls the adjustment levers 4a hanging on the upper ends of the vertical holes 14a of the evacuation holes. Move to the end of the horizontal hole 14b. The adjustment lever 4a which is moved in this way is kept in a fixed position by the horizontal hole 14b. Therefore, the paper feed roller 4 has the horizontal force of the escape hole in a state in which the elastic force of the elastic spring 15 is overcome. It is located at the end of the ball 14b.

As a result, the feed roller 4 is separated from the feed rubber 5, and the feed roller 4 is separated from the feed path of the document.

When the feed roller 4 and the feed rubber 5 are separated in this way, the document does not go through the feed roller 4 and the feed rubber 5, but directly through the scanning position sensor 13 and the feed roller 6 It is possible to insert up to the position of the scanning unit 8 through which the scanning is carried out through 7).

Therefore, it is possible to perform scanning by inserting a single document directly into the scanning unit 8 side, thereby preventing the original from being damaged by the feed roller during the conveyance of the original.

If you want to use the ADF function again after scanning the single document, move the adjustment lever 4a of the feed roller from the horizontal hole 14b of the evacuation hole to the vertical hole 14a and then release the adjustment lever 4a. Since the main surface feed roller 4 is supported by the elastic spring 15 toward the feed rubber 5 side, the adjustment lever 4a returns to the upper end of the vertical hole 14a, which is the original position, and the feed roller 4 It will be in close contact with the feeding rubber (5).

As described above, according to the scanner document feeder and method according to the present invention, when the high-quality scanning of the document is required, there is an effect of improving the resolution by separating the feed roller from the feed path of the document.

Claims (3)

Feed rollers and feed rubbers for continuous feeding of originals, feed rollers for feeding documents fed from the feed rollers to the scanning unit, white rollers installed to correspond with the scanning units, and documents scanned from the scanning unit In the document feeder of a scanner consisting of a discharge roller to be discharged to the side, And a moving means for displacing or returning the paper feed roller on a document conveyance path. The method of claim 1, The moving means is provided with an adjustment lever coupled to both ends of the feed roller, the escape lever is escaped when the feed roller is separated from the feed path of the document, the feed roller feed rollers on both sides of the feed roller The document transport apparatus of the scanner, characterized in that the elastic member is provided so that the gripping so as to return to the feed path side of the document. Automatically feeding continuously the loaded document of the feeder by the feed roller; transferring the document fed from the feed roller to the scanning unit; In the document transfer method of the scanner performed by the step of ejecting the scanned document in the scanning unit to the output side, When feeding multiple sheets from the tray, place the feed roller on the feed path of the document to automatically perform the feeding operation. When scanning a single document, the document feeder of the scanner, characterized in that the feed roller is separated from the feed path of the original so that the original can be directly inserted into the scanning unit.