JPS6163153A - Image input device - Google Patents

Abstract

PURPOSE:To set an original easily, properly and quickly by constituting the titled device such that an original platen is separated from a reading mechanism part for extending on the original platen in a cantilever and pressing with pressure only the read-out part of the original on the original title by means of a positioning frame. CONSTITUTION:A drawer-type slide member 15 is contained on an original platen 1, and a stopper 16 for conneceting a head of an original 6 is erected upright on the member 15. Here the member 15 is pulled out by the prescribed length to fix it to the platen 1, and the head of the original 6 is abutted to the stopper 16 to be set on the platen 1. and the head of the original 6 is abut ted to the stopper 16 to be set on the platen 1. Then a positioning frame 5 is dropped, and a carrier 8 is traveled in the condition where the original 6 is pressed with pressure, thereby reading an area A. The original 6 can be easily set from your side or right side of the stand 1, and the reading areas A is precisely positioned by abutting the original to the stopper 6, thereby recognizing the area A by the frame 5. Consequently the partial reading of the original 6 can be executed easily, precisely and quickly.

Description

DETAILED DESCRIPTION OF THE INVENTION [1] Industrial Application Field - This invention relates to an image input device, and aims to provide a partial image input device that can efficiently read a partial area of a document with simple operations. It is.

1. Conventional technology - Conventionally, image input devices include a so-called flatbed type, in which a document is read by placing it on a transparent document table with the scanning side facing down, and a facsimile device, in which the document is read while being moved by a paper feed mechanism. There are also types.

When reading a part of the image on a document with such a conventional image input device, in other words, performing partial reading, the reading area is specified by the XY coordinates from the reference edge of the document, or the reading area is marked with a marking bevel. For example, the reading area is specified by enclosing it with a mark and having the apparatus read the mark, or by enclosing the reading area with a scale attached to the document table.

-Problems to be Solved by the Invention- However, the means for specifying a partial reading area in these conventional image input devices is complicated to operate, prone to mistakes in specification, and has the problem of staining the document, or There were problems such as inefficiency because it had to be reversed. In addition, flatbed type image input devices are equipped with a document holder, but since the conventional document holder is provided to cover the entire surface of the document, opening and closing the document holder is complicated when reading a portion of the document. There was also the problem that the document sometimes moved and the reading area became distorted.

This invention solves the problems of the conventional means as described above,
It is an object of the present invention to provide an image input device that can accurately and efficiently perform partial reading of a document with simple operations.

Means for Solving a Problem--Explaining using the reference numerals of the illustrated embodiment, the image input device of the present invention includes a document table 1, 1a and a reading mechanism provided at a distance above the document table. 4 and a positioning frame 5, 5a that is pressed against the document 6 directly below the reading mechanism section. It extends on a cantilever, and the original platen 1
．． Reference numeral 1a indicates a stopper 16 that locks the front edge of the original 6 or the record, and a slide member 1 that allows the stopper to move back and forth.
5.15a, the reading area A in the front and back direction of the document 60 is set by moving the slide member 15.15a back and forth, and the image information of the area specified by the positioning frames 5, 5a is read. It is something to do.

One action and one positioning frame 5, 5a move from the reading mechanism section 4 to the original platen 1.
Alternatively, the document table 1a may be provided so as to be able to move up and down and urged upward, and the document 6 may be pressed against a positioning frame 5a provided at a fixed position. You can also do this.

Furthermore, a white reference 14 of the image reading device can be provided in the positioning frames 5, 5a.

In the above configuration, the original 6 is read with the reading side facing up, and the reading mechanism section 4 is provided in a cantilevered manner separated from the original 4, so that the original 6 can be easily read, and the image information to be read can be read. You can perform input operations while directly viewing the information. Further, since the reading area of the original is specified by the positioning frames 5 and 5a that press only a part of the original 6, the original 6 can be set quickly and the reading area can be easily specified and confirmed.

-Example- Next, the illustrated example will be described. 1 to 3 show a first embodiment of the present invention, and FIGS. 4 and 5 show a second embodiment.

In Figures 1 to 3, 1 is an original table, 2 is an operation panel integrated with the original table 1, 3 is a support provided on the operation panel 2, and 4 is a part of the original plate 1 from the support 3. 5 is a positioning frame pivotally attached to the lower part of the reading mechanism section 4; and 6, indicated by an imaginary line, is a document set on the document table 1. The positioning frame 5 is mounted so as to fall onto the document table 1 due to its own weight, as shown by the solid line in FIG. It is designed to be attracted and held by an attached magnet (not shown).

7 is a guide rod installed in the longitudinal direction of the reading mechanism section 4; 8 is a carrier that reciprocates along the guide rod 7; the carrier 8 includes a reflecting mirror 9 installed at 45 degrees;
An imaging lens 10, a one-dimensional image sensor 11, and a halogen lamp 12 for illuminating the original are mounted. Note that the reciprocating drive mechanism for the carrier 8 is omitted in the figure.

Reading area A of the document illuminated by the halogen lamp 12
The reflected light passes through a reflecting mirror 9 and is imaged by an imaging lens 10 onto a light receiving cell of an image sensor 11. The reading area A is a rectangular area having a width W in the main scanning direction by the image sensor 11 and a width in the sub-scanning direction due to the movement of the carrier 8.

The positioning frame 5 has the function of preventing the original 6 from floating up and indicating its reading area A by pressing down the knob 13 and lowering it from the retracted position shown by the imaginary line in FIG. 3 to the original table 1. are doing. Furthermore, a white reference 14 is attached to the front edge of the positioning frame 5 to provide the image sensor 11 with a reference level of reflected light when reading a document, and as shown by the solid line in FIG. When lowered, the white reference 14 enters the reading area A and provides a white reference level to the image sensor 11 every main scan.

A pull-out slide member 15 is inserted into the document table 1, and a stopper 16 for locking the leading edge of the document 6 is provided upright on the slide member 15. FIG. 2 shows the fixing mechanism of the slide member 15. Reference numeral 17 shows the U-shaped side edge of the slide member 15, 18 a guide provided on the side edge of the document table 1, and 19 the U-shaped side edge 17. A pressing body for fixing the slide member 15 by pressing against the guide 18, 20 is a tension spring that biases the pressing body 19 in the right direction in the figure, 21 is a pin set on the immovable member, and 22 is a pin a lever 24 pivotally connected to 21 and engaged with the proximal bent portion 23 of the pusher 19;
is a lever provided integrally with the lever 22, and 25 is an operating knob screwed onto a stationary member whose tip abuts the lever 24. Next, turn the operating knob 2o to operate the lever 24.
22 in the direction C shown in the figure, the pressing body 1
9 is pulled in and the U-shaped side edge 17 of the slide member 15 is pressed against the guide 18 of the document table 1, thereby fixing the slide member 15 to the document table 1.

In the above configuration, the slide member 15 is pulled out a predetermined length and fixed on the document table 1, and the leading edge of the document 6 is held against the stopper 6.
The positioning frame 5 is lowered and the carrier 8 is moved with the document 6 pressed against it to read the area A.The document 6 is placed in front of the document table 1. The document can be easily set on the document table 1 from the side or right side, the reading area A is accurately positioned by bringing the document 6 into contact with the stopper 16, and the reading area A is confirmed by the positioning frame 5. Because you can
Partial reading of the original 6 can be easily, accurately and quickly performed.

In the first embodiment described above, the positioning frame 5 is lowered onto the document, but in the second embodiment shown in FIGS. 4 and 5, the document is lowered by moving the document table 1a upward. 6
The positioning frame 5a is pressed into contact with the positioning frame 5a.

Hereinafter, only the points different from the first embodiment will be described for the second embodiment.

The document table 1a is pivotally connected by a pin 27 to a slide member 15a mounted on a base 26 so as to be slidable back and forth, and a compression spring 28 is interposed between the slide member 15a and the document table 1a. It is mounted so that it is biased upward. The positioning frame 5a is fixed to the reading mechanism section 4, extends downward, and is bent into an L shape so as to surround the reading area A. The base 26 has a pressing body 19 shown in FIG.
a is provided so as to be slidable in the left and right direction, and its tip 2
9 serves as a guide for the slide member 15a, and
The base end 30 is bent into an L shape and is screwed into a screw 31 rotatably attached to the support 3. 25a is the screw 31
By rotating the knob 25a clockwise and moving the pressing body 19a to the left in FIG.
It has a structure in which 5a is pressed and fixed. A stopper 16 for fixing the leading edge of the original 6 is provided upright on the original table 1a.

According to the configuration of the second embodiment described above, the original 6 can be set simply by abutting the original 6 against the stopper 16 while lightly pressing the original table 1a from above the original 6, and even if the paper thickness changes. However, since the reading surface is accurately set at a predetermined height, there is no deviation in reading magnification or focus. Further, as in the first embodiment, by fixing the slide member 15a in a predetermined position, the reading area A can be set accurately, and the set reading area A can be confirmed while directly looking at the document 6. I can do it.

Effects of the Invention As described above, in the image reading device of the present invention, the document table and the reading mechanism section are separated from each other, the reading mechanism section extends on the document table in a cantilevered manner, and the document table is further provided with a positioning frame. Since only the reading part of the document is pressed against the document table, the document can be set accurately, easily and quickly, and an image input device with good operability can be obtained. Since the reading area is indicated by the positioning frame, there is no chance of reading errors, and the burden on the operator, especially when performing partial reading work, can be significantly reduced.

[Brief explanation of the drawing]

1 to 3 show a first embodiment of the present invention, in which FIG. 1 is a perspective view with the housing partially cut away, and FIG.
The figure is a perspective view from below showing the fixing mechanism of the slide member, and FIG. 3 is a side view. FIGS. 4 and 5 show a second embodiment, with FIG. 4 being a perspective view and FIG. 5 being a sectional view of the main part showing the fixing structure of the slide member. In the figure, 1.1a is a document table, 3 is a support, 4 is a reading mechanism, 5.5a is a positioning frame, 6 is a document, 7 is a guide rod, 8 is a carrier, 9 is a reflecting mirror, and 10 is an image forming lens,
11 is a one-dimensional image sensor, 12 is a halogen lamp,
15, 15a are slide members, 16 is a stopper, 19.
19a is a pressing body, 27 is a pin, and 28 is a compression spring.

Claims (4)

[Claims] (1) It has a document table, a reading mechanism section provided at a distance above the document table, and a positioning frame provided directly below the reading mechanism section for pressing the document. The document table extends in a cantilevered manner from a support provided on one side of the document table, and the document table has a stopper that locks the front edge or the rear edge of the document, and a slide member that allows the stopper to move. An image input device characterized in that a read area in the front and back direction of the slide member is set by moving the slide member back and forth, and image information in the area specified by the positioning frame is read. (2) The reading mechanism section is provided a predetermined distance above the document table, and a positioning frame is provided for lowering the reading mechanism section onto the document table.
Image input device as described in Section. (3) The image input device according to claim 1, wherein the document table is biased upward, and a positioning frame that also serves as a stopper for regulating the upward movement position of the document table is provided. . (4) The image input device according to claim 1, 2, or 3, wherein the positioning frame is provided with a white reference for an image sensor when reading a document.