JPH05207228A - Original reader - Google Patents

Abstract

PURPOSE:To provide the original reader in which a length of an original has no limitation. CONSTITUTION:A moving original read section 1 is provided with an original platen 11, an original carrier path 12 extended from a slope lower end position of the original platen 11 in the left direction, carrier rollers 13, 14 arranged on the way of the original carrier path 12, and an optical system 16 fixedly arranged on an upper part of the carrier path 12. Furthermore, a still original read section 2 is provided with an optical system 23 moved from a position P1 to a position P3 at the lower part of a platen glass 22. In the case of reading both sides of the original, the moving optical system of the still original read section 2 is moved up to the position P3 and then the moving original read section 1 is operated and a read element 23a of the moving optical system 23 is activated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a document reading device applied to a copying machine or the like.

[0002]

2. Description of the Related Art FIG. 3 conceptually shows an example of a conventional document reading apparatus having a function of reading both sides of a document.

In this document reading apparatus, a document (not shown) placed on the document table A is taken in from a document receiving port B, separated by a document separating device C, and then a roller D1 is used to cover the platen glass E. It is transported to one end. Then, it is conveyed to a predetermined position on the platen glass E by a document conveying belt G attached to the platen cover F.

A moving optical system H is arranged below the platen glass E, and the original on the platen glass E is read and scanned on the front recording surface by the rightward movement of the moving optical system H.

The moving optical system H is composed of a light source, optical components such as a lens, and a reading element.

When the scanning of one of the recording surfaces is completed, the original conveying belt G is reversely operated, and the conveying path switching gate K provided at the entrance portion J of the loop-shaped conveying path I is shown by a chain line. It is rotated to the position.

As a result, the document is moved to the right and carried into the loop-shaped transport path I. After that, the document is moved in the loop-shaped transport path I by the rollers D2 and D3, and the front and back sides are reversed by this movement. That is, the back side of the document is turned downward.

When the trailing edge of the original has finished passing through the switching gate K, the switching gate K returns to the position shown by the solid line.
Therefore, the document whose front and back are reversed passes through the switching gate K, and is further conveyed by the document conveying belt G to a predetermined position on the platen glass E. And
The document is read and scanned on the recording surface on the back side by the moving optical system H, and is then discharged onto the document discharge tray L by the document conveying belt G.

It is also possible to open the platen cover F, place an original directly on the platen glass E, and read and scan the original with the moving optical system H. In this case, only one side of the original will be read.

[0010]

As described above, in the conventional document reading apparatus, the document is inverted by the looped conveyance path I. Due to the structure of such an original reversing means, the length of the original must be smaller than the length of the looped conveyance path I.

Therefore, in this conventional document reading apparatus, the length of the document is limited, which is inconvenient for the user who uses the irregular document.

In view of the above situation, an object of the present invention is to provide an original reading device in which the length of the original is not restricted.

[0013]

According to the present invention, there is provided a stationary original reading section for reading and scanning a stationary original with a moving optical system, a moving original reading section for reading and scanning a moving original with the stationary optical system, and the stationary original reading section. Alternatively, the means for selectively operating one of the moving original reading units and the moving original reading unit in the double-sided reading mode are operated, and the moving optical system of the stationary original reading unit is used to move the back surface of the moving original to the back side. And a means for moving the reading element of the moving optical system to a predetermined position where the reading is possible and stopping the reading element.

[0014]

When the double-sided reading mode is set, the moving optical system of the stationary document reading unit is moved to a predetermined position where the back side of the moving document can be read. Then, the stationary moving document reading unit is operated and the reading element of the moving optical system is operated.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an original reading device according to an embodiment having a function of reading both sides of an original. This original reading device includes a moving original reading unit 1 and a stationary original reading unit 2.
It consists of

The moving document reading unit 1 includes a document table 11 and
A document conveying path 12 extending leftward from the inclined lower end position of the document table 11, conveying rollers 13 and 14 arranged in the middle of the document conveying path 12, the document table 11 and the conveying path 12 A document separating device 15 interposed therebetween and a stationary optical system 16 fixedly arranged above the conveying path 12 are provided.

On the other hand, the stationary manuscript reading unit 2 includes a platen cover 21, a platen glass 22 on which a manuscript (not shown) is placed, a moving optical system 23 located below the platen glass 22, and the moving. A feeding mechanism (not shown) for moving the optical system 23 from the P1 position to the P2 position and the P3 position is provided.

The positions P1 and P2 indicate the maximum main scanning area of the moving optical system 23 in the stationary document reading section 2. The position P3 is a position where the moving optical system 23 faces the stationary optical system 14 of the moving document reading unit 1.

FIG. 2 shows a control system for operating the moving original reading unit 1 and the stationary original reading unit 2. In the figure, a document detecting sensor 30 detects that a document is placed on the document table 11, and an optical system detecting sensor 31 detects that the moving optical system 23 has moved to the P3 position. In addition, the paper position detection sensor 32 further detects that the document has reached a predetermined reading position on the document conveyance path 12, and the document set detection sensor 33 further has the platen cover 21 opened. They are provided to detect that a document is set at a predetermined position on the platen glass 22.

The output of the original document detection sensor 30 is output to the moving original control unit 34, the output of the optical system detection sensor 31 is output to the moving original control unit 34 and the stationary original control unit 35, and the output of the paper position detection sensor 32 is output. The output of the document set detection sensor 33 is applied to the moving document control unit 34 and the still document control unit 35, and the output of the document set detection sensor 33 is applied to the still document control unit 35.

The operation of this embodiment will be described below.

First, the case where a document whose both sides need to be read is placed on the document table 11 will be described. In this case, the operator sequentially turns on the double-sided reading designation switch 36 and the activation switch 37. At this time, the document detection sensor 30 is in the state of detecting the document.

Based on the double-sided reading mode signal output from the double-sided reading designation switch 36, the stationary original control unit 35 operates the drive motor 24 of the feeding mechanism provided in the stationary original reading unit 2 to stop the original. The moving optical system 23 of the document reading unit 2 is moved from the P1 position to the P3 position. The completion of the movement of the moving optical system 23 is detected by the optical system detection sensor 31 and the moving original control unit 3 is detected.
4 and the stationary manuscript controller 35 read the moving manuscript while the manuscript detection sensor 30, the optical system detection sensor 31, and the start switch 37 output a manuscript detection signal, an optical system detection signal, and a start signal, respectively. The unit 1 and the stationary document reading unit 2 are operated to read. That is, the moving document control unit 34 operates the motor 17 to rotate the roller 15a of the separating device 15 and the conveying rollers 13 and 14 shown in FIG. As a result, the document placed on the document table 11 is sent to the transport path 12 via the separating device 15 and then transported at a predetermined speed along the transport path 12.

In the transport path 12, the document is the optical system 1 described above.
When a predetermined reading position for 6 is reached, the paper position detection sensor 32 detects this. At this point, the moving original control unit 34 activates the optical system 16, and thereafter,
The reading element 16a of the optical system 16 reads the recorded content on the front side of the document.

On the other hand, the stationary original control unit 35 determines that the original is the optical system 23 based on the output of the paper position detection sensor 32.
When a predetermined reading position for the optical system 2 is reached, the optical system 2
The reading element 23a of No. 3 is activated.

Since the optical system 23 has been moved to the position P3 shown in FIG. 1, the recording content on the back side of the document is read by the reading element 23a as the document moves.

In this manner, the recorded contents on the front surface and the back surface of the original document are read while passing through the transport path 12. Then, the read document is discharged from the document discharge port 18 shown in FIG. Further, when the reading of the document is completed, the optical system 23 is returned to the origin position P1.

When reading only one side of the original,
It is only necessary to operate the double-sided reading designation switch 36.
In this case, the operation of moving the optical system 23 from the origin position P1 to the position P3 is not performed. The reading of the original is performed by the reading element 16a of the optical system 16.

Next, the case where only one side of the original is read by only the stationary original reading unit 2 will be described. In this case,
When the platen cover 21 is opened, the platen glass 22
The original is set at a predetermined position above. At this time, the document set detection sensor 33 detects the document set. When the start switch 37 is operated in this state, the stationary document control unit 35 operates the motor 24 of the feeding mechanism to move and scan the optical system 23 toward the position P2, and the reading element of the optical system 23. The reading operation of 23a is performed, whereby the recorded content of the document is read. The moving scanning amount of the optical system 23 is automatically set based on the size of the document.

In the above embodiment, the optical system 23 is moved to the P3 position when the double-sided reading mode is designated. However, even if the moving position of the optical system 23 is set to any position between the P1 position and the P3 position. Good. However, in this case, it is necessary to form the document transport path from the lower end of the document table 11 to the left end portion on the platen glass 22 in place of the document transport path 12. Then, in this case, the document transport belt G shown in FIG. 3 can be applied as a document transport unit on the platen glass 22.

[0031]

According to the present invention, since the original reversing means such as the loop-shaped conveying path used in the conventional original reading apparatus is not required, the length of the original is not restricted. Therefore, it is possible to obtain the practical convenience that it is possible to read both sides of an irregularly shaped original.

[Brief description of drawings]

FIG. 1 is a conceptual diagram showing an embodiment of a document reading apparatus according to the present invention.

FIG. 2 is a block diagram showing an example of a control system in the embodiment.

FIG. 3 is a conceptual diagram showing an example of a conventional document reading apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Moving original reading unit 2 ... Still original reading unit 16 ... Moving optical system 16a, 23a ... Reading element 17, 24 ... Motor 23 ... Still optical system 34 ... Moving original control unit 35 ... Still original control unit 36 ... Both sides Read designation switch 37 ... Start-up switch

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location H04N 1/10 7205-5C // G03G 15/04 113 9122-2H

Claims (1)

[Claims] 1. A moving original reading unit for reading and scanning a moving original with a stationary optical system, a stationary original reading unit for reading and scanning a moving original with a moving optical system, and the moving original reading unit and the still original reading unit. A means for selectively operating one of the two, and a predetermined position capable of operating the moving document reading unit in the double-sided reading mode and causing the moving optical system of the stationary document reading unit to read the back side of the moving document. An original reading apparatus comprising means for moving to a stationary state and activating a reading element of the moving optical system.