JPS60256264A - Picture reader - Google Patents

Abstract

PURPOSE:To read an original with a width up to twice the reading width without being limited to the width of an opening by opening one end of the opening at one end in the direction orthogonal to the original carrying direction of a press contact unit. CONSTITUTION:The press contact unit 14 is of cantilever support structure, one side 14a is continuous to the main body 2 and the other end is made to be a free end. Since one end of the opening 15 formed between the unit 14 and the upper face of the main body 2 is opened, when the end of the original is projected outward from the opening side, an original having a width larger than the width of the opening 15 is passed through. When the width of the original possible for reading is W, the original having a width larger than the said width is read in the following. After the original 3 is carried toward the arrow (a) and then read, the front and rear side of the original 3 is reversed and carried toward the arrow (b) and then read. Thus, all the information of the original having a width up to 2W is read.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an image reading device, and more particularly to an image reading device of a type in which one end side of a press-contact unit is opened to read a large-sized document.

[Prior art]

A conventional image reading device of this type is shown in FIGS. 1 to 3.

t 1 ) In FIGS. 1 and 3, the image reading device whose whole is indicated by the ministry number 1 is an image reading device, and the upper surface of the main body 2 is a document table, on which the document 3 is placed facing downward.

The document 6 is moved to the right in the figure while being pinched by the two transport rollers 4 and 5 and the pinch roller 6.7 pressed against the upper side thereof.

The pinch rollers are pressed against the conveying rollers 4 and 5 with a constant pressure by a pressure contact unit l=8.

On the other hand, inside the main body 2, as shown in FIG. 2, a reading optical system consisting of a mirror 9, a lens 10, and a light receiving element 11 is arranged.

The original that has been read is sent onto a tray 12 provided above the main body 2.

On the other hand, the original 6 is inserted through an elongated opening 13 formed between the pressure contact unit 8 and the upper surface of the main body 2, as shown in FIG.

Therefore, the thickness of the document 6 is determined by the size of the opening 13.

Therefore, if it is desired to pass an original whose paper width is wider than the width of the opening 13 (2), the original must be copied onto a sheet of paper large enough to pass through the opening 13, but there is no other way than to cut the original.

Once the method of copying onto paper of a size that can be passed through is adopted, there is a drawback that the divided portions have non-image areas due to the separation belt peculiar to copying machines, and the upper part of the image is missing in this portion.

〔the purpose〕

The present invention has been made in order to eliminate the above-mentioned drawbacks of the conventional technology, and is configured to be able to read a document without being limited by the size of the document and without causing loss of image information. The purpose is to provide an image reading device.

〔Example〕

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

4 to 6 illustrate one embodiment of the present invention, and in each figure, the same or corresponding parts as in FIGS. 1 to 3 are denoted by the same reference numerals, and the explanation thereof will be omitted.

(3) In this embodiment, the pressure welding unit, which is different from the conventional one, is used.
has been established.

The pressure contact unit 14 has a cantilever support structure, and one end 14a thereof is continuous with the main body 2 [+11], and the other end is a free end.

Therefore, since one side of the opening 15 formed between the pressure contact unit 14 and the soil [nl of the main body 2] is not opened, if the edge of the document is protruded outward from this open side, the opening 15 will be opened. Documents with four widths thicker than the width of the portion 15 can be passed through.

This state is shown in FIGS. 4 and 5.

Now, assuming that the width of a readable document is W, a document having a width larger than this width W is read as shown in FIG.

That is, assuming that the surface shown in FIG. 6 is the original surface, the original 3 is conveyed in the direction shown by arrow a and read and stacked without being separated, and then the original document tray is reversed back and forth as shown by arrow a. It is sufficient to read the document by transporting it in the direction shown in FIG.

Therefore, if the width of the original is A, the width at 2W-i is ('4
) It is possible to read all the information in the original manuscript.

Specifically, if the reading width W is the short side of A4, the document width A can be read up to the short side of A2. A device that is the same size as a device that can only read up to A4 documents can read up to A2 documents.

On the other hand, FIG. 7 shows another embodiment of the present invention.

In this embodiment, a hinge 16 is provided between one end 14a of the pressure contact unit 14 and the main body 2, so that the pressure contact unit 14 is rotatably mounted.

If such a structure is adopted, even if a document jams during reading, the pressure unit 14 can be opened to easily clear the jam.

By employing the above-described structure, it is possible to freely read originals of a size that cannot normally be read, such as drawings.

〔effect〕

As is clear from the above description, according to the present invention, a pressure unit that presses the pinch roller that pinches and feeds the document between the conveyance roller and the conveyance roller is supported at one end in a direction perpendicular to the conveyance direction of the document; The other end has a structure in which one end of the opening between the pressure welding unit and the top surface of the device body is open as a free end, so the width of the opening (2 times the reading width 1) is not limited. It is possible to read originals of this width.

[Brief explanation of the drawing]

1 to 3 are a plan view, a longitudinal front view, and a side view explaining a conventional structure, and FIGS. 4 to 6 are a perspective view, a side view, and a document reading device explaining an embodiment of the present invention. Illustration of the method,
FIG. 7 is a side view illustrating another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Image reading device 2... Main body 6... Document 4.5... Conveyance roller 6.7... Pinch roller 14... Pressure unit 15... Opening part 16... Hinge

Claims (1)

[Claims] An image reading device that includes a document transport roller, a pinch roller that presses against the transport roller, and a pressure unit that applies pressure to the pinch roller, and that feeds the document through an opening between the pressure unit and the top surface of the apparatus main body. An image reading device characterized in that one end of the opening is opened at one end of the pressure contact unit in a direction perpendicular to the document conveyance direction.