JPS62294377A - Reader - Google Patents

Abstract

PURPOSE:To uniformize a distance between the object image planes of a mobile optical device in both reading of a still document and a moving document, and to rapidly perform the switching of both reading, by providing a positioning projecting part for the still document between the supporting plane of the still document, and that of the moving document, and reading the still document by the mobile optical device provided beneath a reading transparent plate before it moves away in a direction to separate from the projecting part. CONSTITUTION:On the upper plane of a reading glass 23, a projecting part 40 for the positioning of the still document is provided at the position of a read start point C. Since a document plane is positioned at the upper plane of a common reading glass 23 in both reading of the still document and the moving document, it is possible to keep the distance between the object image planes of an optical system uniformly, by keeping the traveling position of a mobile optical device 37 in parallel with the reading glass. Also, since the traveling range of the mobile optical device 37 is covered by a sheet of reading glass 23, the invasion of dirt and dust, etc., can be prevented. Furthermore, since a moving document reading part 22 is arranged at the left side of a still document reading part 21, that is, at upstream in a subscan direction, it is possible to reduce the moving time of the mobile optical device, and to perform rapid switching.

Description

[Detailed Description of the Invention] 3. Detailed Description of the Invention Industrial Application Field The present invention relates to a document reading device for a facsimile machine or a copying machine, and in particular is capable of reading both a stationary document and a moving document. Regarding a reading device.

2. Description of the Related Art As shown in FIG. 3, this type of apparatus has a stationary document reading section 1, a moving document reading section 2, and a movable reading optical device 3 in both reading sections 1.2. The stationary document reading section 1 is provided with a reading glass 5 on which a document 4 is placed flatly, and a document presser 6 that presses the document 4 against the reading glass 5. A paper roller 28, a conveying roller 0 and a presser roller 1 arranged on both sides of the reading position B to convey the original 7, an original guide 12 for guiding the original, a reading glass 13 provided at the reading position B, etc. are provided. There is. In this apparatus, when reading a stationary original 4, the moving optical device 3
The scanning of the moving document 7 is carried out while moving in the direction of arrow A (sub-scanning direction) along the moving optical device 3 at the reading position B.
This is done by stopping the document 7 below the reading position B and passing the document 7 through the reading position B.

Further, as shown in FIG.
- The reading surface is arranged so as to be perpendicular to the reading surface of the stationary original reading unit 1, the optical path is switched by the optical path switching mirror 15, and the moving optical device 3 is used to read the stationary original and the moving original. There are also known devices configured to be read.

Problems to be Solved by the Invention However, with this configuration, the stationary document reading section 1 and the movable document reading section 2 are separated within the same device, so reading accuracy management is complicated and diverse, and the number of parts used is also high. become more,
This makes it extremely difficult not only to stabilize quality but also to downsize the device.

The above-mentioned problem occurs for the following reasons: In order to perform a good reading, it is important to control the accuracy of the distance between the object and image planes of the reading section. Although it is necessary to set the distance of each reading glass of each part to the moving optical device constant, since the reading glasses of each part are provided separately, it is difficult to adjust the position. Further, in the apparatus shown in FIG. 4, it is necessary to precisely control the positional accuracy of the optical path switching by the mirror, the mirror angle, and the stoppage of the moving optical device, and this accuracy control is difficult. Furthermore,
Conventional devices use a conveyor roller and a presser roller that sandwich and convey the document to convey the moving document, so the conveyor roller or presser roller protrudes beyond the scanning glass toward the moving optical device, which causes problems. , it becomes difficult to use a moving optical device with a short distance between object and image planes, and it is difficult to miniaturize the device.

In addition, in conventional devices, the stationary document reading section and the moving document reading section are separate, so dust and the like can easily enter the device, resulting in deterioration of reading due to dirt caused by dust and the like.
There is also a problem in terms of maintenance of the device, which makes it extremely difficult to use.

Furthermore, in the conventional apparatus shown in FIG. 3, the moving document reading section is arranged downstream of the stationary document in the sub-scanning direction (direction of arrow A). When performing reverse switching, there is also the problem that the moving optical device has to be moved a long distance, which requires a long preparation time.

5'-- The present invention has been made in view of the above-mentioned problems, and it is easy to control the accuracy of the distance between object images in the reading unit for moving and stationary documents, and eliminates the need for optical axis switching using a mirror. First, it is an object of the present invention to provide a low-cost, small, and lightweight reading device that can quickly switch from stationary document reading to moving document reading or vice versa.

In order to solve the above-mentioned problems, the present invention provides a flat reading transparent plate extending across both the stationary original reading section and the moving original reading section, and this reading transparent plate A stationary document support surface on which the document is placed flatly and a moving document support surface through which the moving document passes are formed, and a convex portion for positioning the stationary document is provided between the two support surfaces, and a convex portion for positioning the stationary document is provided below the reading transparent plate. A moving optical device is arranged to run along the reading transparent plate, and the moving optical device is configured to read the stationary original while moving in a direction away from the convex portion. It is.

According to the above-described structure, the present invention positions and places the document on the stationary document support surface of the reading transparent plate using the convex portion, and in this state, the movable optical device travels below the stationary document in the sub-scanning direction. In addition, by stopping the moving optical device below the moving document support surface of the reading transparent plate and passing the document through this moving document support surface, it is possible to read reversely moving documents. It can be performed. At this time, since the stationary document support surface and the moving document support surface are formed on the same reading transparent plate, it is easy to equalize the distance between the object image planes of the moving optical device on both support surfaces, and the reading Since there is no protruding part on the lower surface of the transparent plate, it is possible to use a close-contact type moving optical device with a short distance between object and image planes. In addition, since the moving document reading section is provided upstream of the stationary document reading section in the sub-scanning direction, it is possible to shorten the distance between the reading position of the moving document reading section and the reading start point of the stationary document reading section. , it becomes possible to quickly switch between reading a stationary original and reading a moving original.

7' Examples The present invention will be described in detail below. FIG. 1 shows a schematic configuration of a reading device according to an embodiment of the present invention.
Reference numeral 1 denotes a stationary document reading section, 22 a moving document reading section, and 23 a flat reading transparent plate made of glass or the like (hereinafter referred to as reading glass) extending across both the stationary document reading section 21 and the moving document reading section 220. It is. On the top of this reading glass,
A stationary document support surface Z (a and
A moving document support surface 23b through which the moving document 5 passes is formed on the same plane. Reference numeral 2G is a document surface that presses a stationary document steel against the reading glass surface, and 27 is document moving means that conveys the document so that the movable document 5 passes through the movable document support surface 23b. This document moving means 27 includes a document surface 2
6 A feed roller that feeds out the documents 5 placed above one by one, a conveyance roller 29 that conveys the document 5 while pressing it against the moving document support surface 23b, a row 230 that discharges the document, document guide: 31, document receiver 32 etc. Both the document surface 26 and the document moving means 27 are attached to the reading glass 23.
It is held by an opening/closing lid 35 that can be pivoted around a pin 34 located on an extension of the two sides.

Reference numeral 37 denotes a movable optical device for reading each document on the reading glass η or 5, and is movably provided along the reading glass z3 with a constant distance between it and the reading glass. Reference numeral 38 denotes a drive device that causes the moving optical device 37 to travel. This moving optical device 37 is configured to read a stationary document while traveling in the direction of arrow A, and therefore, the direction of arrow A is the sub-scanning direction. The above-mentioned moving document reading section 22 is arranged upstream of the stationary document reading section 21 in the sub-scanning direction and as close as possible to the reading start point C of the stationary document reading section 21 . Furthermore, a convex portion 4o for positioning a stationary document is provided on the second surface of the reading glass B at the reading start point C position. The convex portion 40 may be transparent or opaque, and as shown in FIG. 2, it is adhesively fixed and integrated onto the reading glass surface. If necessary, a line, symbol, or the like may be added to the convex portion 40 or a portion of the reading glass near the convex portion that does not interfere with reading, indicating a position where a stationary original is to be placed.

9　′　・ Next, the reading operation by the device described in section 1 will be explained. ! .

First, in order to read the moving original, the moving optical device 37 is kept stationary at the position shown in the figure, that is, below the reading position of the moving original reading section 22, and the original 5 is placed at a predetermined position on the upper surface of the opening/closing lid 35 by seven strokes. . This document 5 is placed in the paper feed roller path and the transport roller 29.
The documents are pulled out one after another, pass through the two moving document support surfaces 23b of the reading glass, and are read by the moving optical device 37 that is stopped below. Next, to perform static document reading, open the opening/closing lid 35, position and place the document 24 on the stationary document support surface z3a of the reading glass B using the convex portion 40, and press it with the document surface 26. In this state, the movable optical device 37 is moved in the sub-scanning direction shown by the arrow A from the reading start point C of the stationary document reading section 21 to perform reading.

In this way, in both stationary original reading and moving original reading, the original surface is located on the common upper surface of the reading glass.
By keeping the traveling position of the moving optical device 370 parallel to this reading glass, the distance between the object image planes of the optical system in both readings can be kept uniform, and reading variations within the device can be reduced to a constant accuracy of 10. In addition, since there is no protruding part on the lower surface of the reading glass over the entire travel range of the moving optical device 37, the moving optical device 37 can be easily assembled and managed. A short contact type image sensor, for example, a contact type image sensor can be used, and the device can be made smaller and lighter. Furthermore, since the travel range of the moving optical device 37 is covered by a single reading glass plate, dirt, dust, etc. are prevented from entering the device, and problems caused by dust adhesion to the moving optical device 37 are avoided. It will be resolved. Furthermore, since the moving document reading section 22 is arranged on the left side of the stationary document reading section 21, that is, upstream in the sub-scanning direction, the document reading section 22 is placed near the reading start point C of the stationary document reading section 21. When the reading position is located and switching from a moving document reading operation to a stationary document reading operation or vice versa, the moving time of the moving optical device can be shortened, and prompt switching is possible.

Effects of the Invention As is clear from the above description, the present invention provides a flat reading transparent plate extending 11' across both the stationary document reading section and the moving document reading section. ,
A stationary document support surface on which the document is placed in a flat manner and a moving document support surface through which the moving document passes are formed, and a moving optical device is disposed below the reading transparent plate and runs along the reading transparent plate. This makes it possible to use the same transparent reading plate to read a stationary original and to read a moving original, making it easy to equalize the distance between the object image planes of the moving optical device in both readings, and - It is possible to easily assemble and manage the reading variations within a given area to a certain level of accuracy, and there is no protruding part on the bottom surface of the transparent reading plate.
By using a close-contact type moving optical device with a short distance between object and image planes, the device can be made smaller and lighter.Furthermore, the transparent reading plate prevents dust from entering the moving optical device below.
This prevents dust from entering the moving optical device.
It is possible to prevent problems caused by adhesion of dust, etc.

In addition, by providing a protrusion for positioning a stationary document directly on the reading transparent plate, this convexity can be made small, and the document reading section that moves upstream in the sub-scanning direction when reading a stationary document can be made smaller. By arranging the scanner, it is possible to place the reading position of the moving original reading unit and the reading start point of the stationary original reading unit extremely close to each other, and the switching operation between static original reading and moving original reading can be performed quickly. This has the effect of making it possible to

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view of a reading device according to an embodiment of the present invention, FIG. 2 is a perspective view showing a reading glass used in the reading device, and FIGS. 3 and 4 are schematic diagrams of conventional reading devices. FIG.

Claims (1)

[Claims] A flat reading transparent plate having a stationary document support surface on which a document is placed flatly and a moving document support surface through which a moving document passes on the same plane, and a convex portion for positioning the stationary document between the two support surfaces. a document presser for pressing the document placed on the stationary document support surface; a document moving means for conveying the document so that the document passes through the moving document support surface; a moving optical device that is arranged to run along the transparent plate for reading and reads the document on the transparent plate for reading, and the moving optical device reads the stationary document while it moves in a direction away from the convex portion. A reading device characterized in that it is configured as follows.