JPS6264163A - Original reader - Google Patents

Abstract

PURPOSE:To prevent in advance reading at an improper position of an original by adopting th constitution that an optical unit running while being bridged over an original cover reads an original set upward to reduce the opening/ closing operation by the operator for the replacement of the original. CONSTITUTION:A cover 3 is opened, the original 2 is set onto an original platen 9 so that the original face goes upward and the original cover 3 is covered thereon. Since the cover 3 is made of a light transmittable material, after whether the original is placed at a proper position or not is confirmed, a command button 8 is operated. A drive mechanism in the main body 1 is operated and an optical unit 7 runs in parallel on the original cover 3 at a prescribed speed. The optical unit 7 scans the original 2 in both the main and subscanning directions during the running to give original information sequentially to a photosensor 5. A light source 4 is lighted at the start of running of the optical unit 7 and extinguished at the end of subscanning.

Description

[Detailed Description of the Invention] A) Industrial Application Field The present invention relates to a document reading device that reads an original such as a document using an optical sensor, and is used as an input section of an information transmission device such as a facsimile machine or a plain paper copying machine. It is something that is used.

p) Conventional technology In general copying machines, the original is set so as to face the original table, and the original is read by an optical unit installed inside the main body of the device. It has been proposed that an optical unit built into a cover that covers a document is read by an optical unit built into a cover that covers the document (Japanese Unexamined Patent Publication No. 184533/1983). In this conventional example, the optical unit is built into a cover that is operated each time a document is set on or reset on the document table, so the cover becomes large and heavy, which poses a disadvantage in operability. In addition, it is recognized that the structure does not allow the document on the document table to be seen through after the cover is set, so it is not possible to confirm whether the document is set in the correct position, resulting in poor reading. 2 That was it.

e→ Problems to be Solved by the Invention The present invention has been made in consideration of the above-mentioned problems in the conventional apparatus, and reduces the burden on the operator during loading and unloading of originals on the original AM table. It is an object of the present invention to provide a document reading device that can perform the following functions and also check for an incorrect orientation of the document on the document table before the reading operation.

B)) Means for Solving the Problems The present invention provides a document reading device main body 11) having a document placing section on its upper surface, and an S.
(1) a document cover made of a light-transmitting material, which is set on the main body of the apparatus with Noizumi Maki (21) placed on the document placement table so that the reading surface pi faces upward; (3), a light source (4) that generates light that can be applied to the document, a light sensor (5) that detects reflected light from the document, and a light source (5) that is arranged in an optical path from the light source to the light sensor. and an optical unit (7) configured to be able to move over the document cover set as described above on the main body of the apparatus. This is a document reading device.

(e)) Function: In the apparatus of the present invention, when a document is attached to or removed from the document am table, the optical unit is configured to allow the opening and closing operation of the document cover, which is configured to be openable and closable with respect to the document arJIL table. It is located away from the opening/closing position of the document cover. Therefore, loading and unloading the original onto the original placing table and opening and closing of the original cover are performed without being interfered with by the optical unit. Further, the reading of the original on the original placing table is carried out by main and sub-scanning on the original by an optical unit that runs across a light-transmissive original cover on the original. Since the document cover is translucent, the posture of the document placed on the document table can be checked through the document cover even after the cover is set on the document.

(F) Embodiment FIG. 1 is a perspective view showing an overview of the basic configuration of the apparatus of the present invention, and FIG. 2 is a side view of the apparatus showing an overview of the optical unit in a schematic cross section. 2 in each figure, (1) is the main body of the document reading device, (3) is the document cover, and (7) is the optical unit.

The document reading device main body (1) has an optical unit (7) therein.
), and in the case of a copying machine, receives a supply of plain paper, transfers, develops, and prints the original image onto the plain paper, and then outputs the copy paper.

In addition, in the case of facsimile, for transmission output to the telephone line,
It includes two signal processing means, and further includes a drive mechanism that is activated by operation of a command button (8) and controls the movement of the optical unit (7). This document reading device main body (1) is equipped with a document handler (9) in the center of its top surface, and is equipped with an idle rail (101) that guides the movement of the optical unit (7) in the rear and lateral direction. .Furthermore, the original force z(-13
One of the hinges u11 for rotatably supporting the guide rail (10) is fixed at the front side of the guide rail (10).

The document cover (3) is made of a transparent material such as glass, and is designed to completely cover the document (2) placed on the document tray (9) with the document surface facing upward. This document cover (3) is designed with the hinge (
11) with the other fixed, and can be set to the dashed line (open) position and the solid line (closed) position shown in the figure by the action of this hinge. In order to accommodate various thicknesses of originals + 23, the original document holder (9) is located in the main body of the original reading device (1).
The front side of the document is narrowed between the document cover (old document cover) and the document placement portion (9) so that it always coincides with the position of the back surface of the document cover (3).

The optical unit (7) includes a light source (4) that generates light that passes through the document cover (3) and illuminates the document (2);
) and a light sensor (5) that detects the reflected light from
ii 41 to the optical sensor 151) (, and optical elements (6) such as mirrors and lenses arranged in the optical path. In this embodiment, the light source (44 is a row of LED lamps); 6) is a short-focus lens array, and the optical sensor (5) is a close-contact type face-shaped imaging lens array.These may be arranged at a density that corresponds to the required degree of deoxidation in the main scanning direction. 3 shows another embodiment of this optical unit.The light source (4) is a fluorescent lamp, and the optical element (6) is a reflective mirror C6a) (6b).
(6C), and the optical sensor (5) is a solid-state image sensor array. The lens (6C) is designed to form an image on the original (2) onto the solid-state image sensor array (5). This optical unit (7) is controlled to move forward in one direction of the arrow from the illustrated position to position u3, and then return to its original position. U is a pulley that helps this reciprocating movement together with the guide rail.

In order to read the document section while in this device, first set the document cover 13) to the open position and then open the document alit section (9).
Place original (2) on top with the original surface facing upward. The document cover 13) can then be placed over this document.

This bankruptcy state is maintained by the operator's hand (manuscript cover (3)
), but in addition to this, it is possible to install a locking mechanism between the device body (1) and the document cover (3) that can be engaged and detached with a simple operation. You may also use it. After setting the original (2) between the original placing area (9) and the original cover (3), check whether the original is placed in the correct position by looking through the original cover (3). , operate the command button (81).The drive mechanism in the device body 1 is operated, and the optical unit (7) runs parallel to the document cover (3) at a predetermined speed (sub-travel speed). do.

During this traveling, the optical unit (7) scans the original (2) mainly in the direction of the comic 17 and sequentially provides original information to the optical sensor (5). ), and when the sub-scanning is completed (in this embodiment, the optical unit moves once, but the sub-scanning is completed in only the first half of the forward movement).
(configured to turn off).

(G) Effects of the Invention The present invention is configured to read a document through the document cover by an optical unit that travels over the document cover which presses the document with the document side facing up.

In other words, since the document cover (C) is configured without the optical unit attached, the external dimensions of one document cover and the size of each document cover can be reduced, and the burden on the operator who opens and closes this document cover for exchanging documents can be reduced. Furthermore, the original that has been reloaded face up on the original placing table can be seen through the original cover, so that checking to prevent the original from being read at a defective position is extremely time consuming.

[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 is a perspective view showing the basic configuration of the device of the present invention; Fig. 2 is a side view of the device mainly showing the e-mains of the optical unit in a schematic Ifr plane; The figure is a side view corresponding to FIG. 2 1 of another embodiment 1cJ3. (1)...Setting section reading device main body, (3)...Document cover, (7)...Optical unit, (4)...Light source, (
5)...Light sensor. (6)...Optical element.

Claims (1)

[Claims] (1) A document reading device main body having a document placement section on the top surface;
A light-transmitting sheet is provided so as to be openable and closable with respect to the apparatus main body, and is set in the apparatus main body with a document placed on the document placement section with the reading surface facing upward sandwiched therebetween. A document cover made of a material, a light source that generates light that can be applied to the document, a light sensor that detects reflected light from the document, and a light sensor that is arranged in an optical path from the light source to the light sensor. an optical unit having a built-in optical element, the optical unit being configured to be movable over the apparatus main body astride the document cover set as described above.