JPH0633730Y2 - Flat image scanner - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a flat-type image scanner, and in particular, it can read a large-sized original such as a plate collection, and displays a printed matter in a simulated manner to determine color separation conditions. The present invention relates to a flat image scanner useful for reading image information of a plate for automatically checking or peeling off a peel-off film for masking unnecessary portions.

[Conventional technology]

In recent years, planar image scanners using line sensors such as CCDs (charge coupled devices) have been widely put into practical use. For example, also in the field of printing, a plane image scanner is used for inputting a block copy for confirming the layout of characters and patterns.

[Problems to be solved by the device]

Generally, in printing, patterns such as photographs and paintings are color-separated and shaded to produce a color-separated negative film. Illustrations, graphs, line drawings such as tables, and characters and logo marks are mainly photographed by a camera to make a negative film. A negative film made from such various originals is pasted at a predetermined position on a single Mylar film in units of 2 pages, 4 pages, etc. to make a plate. That is,
Large prints such as posters are collected one by one,
Books of A4 etc. are collected in units of 4 to 8 pages.

However, the size of the document table of a general flat image scanner was at most A3. Therefore, since it is not possible to read all the image information of a large original such as a stencil at the same time, it is necessary to change the position of the original on the original table and partially read it. However, in the conventional flat image scanner, there are cases in which the central portion of the plate collection cannot be positioned within the reading range on the platen because it obstructs the mounting position of the cover of the document holder and the mounting position of the light source. It was

Therefore, this invention can position any part of a document of any size within the reading range on the platen.
It is an object of the present invention to provide a flat image scanner capable of reading image information of a large size such as a plate collection.

[Means for Solving the Problems]

The flat-type image scanner according to the present invention is provided with a gap portion open at both ends on one side surface of a housing having a line sensor, or a gap portion is formed by cutting a part along one side surface of the housing in the height direction. The light source is supported on the housing via an arm provided outside the gap.

[Action]

According to the flat image scanner according to the present invention, when a document is larger than the upper surface of the housing, the part of the document which is not being read at present is stored in the gap so that any part of the document of any size can be surely stored. It can be placed within the reading range on the platen, and an image of a large-sized document such as a plate collection can also be read.

〔Example〕

An embodiment of a flat image scanner according to the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing the structure of one embodiment. A magnet sheet 2 is attached to the upper surface of the rectangular parallelepiped housing 1. The magnet sheet 2 is magnetized because the register pins 3 for adjusting the position of the plate as a document over the four plates can be fixed. If the original does not need to be aligned, the upper surface may be simply glass. The size of the surface of the housing is vertical 92
It is 0 mm and 1000 mm wide.

A transparent member such as glass is fitted into a part of the magnet sheet 2 to form the reading window 4. The reading window 4 is 155 mm long and 130 mm wide. The position of the reading window 4 is preferably the central portion in the horizontal direction and the end portion in the vertical direction. The center of the rectangle of the reading window 4 is 60 mm from the front side surface. A line sensor such as a CCD is provided below the reading window 4, and the line sensor performs two-dimensional scanning by moving the line sensor in the direction orthogonal to the array direction. 20 line sensors
It consists of 48 elements.

On one side surface of the housing 1 close to the reading window 4, there is provided a gap 5 having a substantially U-shaped cross section, which is open on both sides. The gap 5 is 70 to 80 mm apart.

An arm 6 is provided outside the gap portion 5.
Thus, the light source 7 is supported on the reading window 4 of the housing 1. The light source 7 is composed of a parallel linear fluorescent lamp facing the line sensor, and the fluorescent lamp also moves as the line sensor moves.

Although not shown, the output of the line sensor is output as image information and supplied to the image processing unit, the display unit, and the like.

According to such a flat-type image scanner, when the original is larger than the upper surface of the housing, the light source 7 comes from the upper surface.
A document protruding in the direction of the support arm 6 can be stored in the gap 5. As a result, the document can be freely positioned anywhere on the upper surface of the housing without being disturbed by the support arm of the light source. Therefore, even a central portion of a large-sized document such as a plate collection can be positioned on the reading window 4. In this embodiment, it is possible to read any portion of the stencil sheet up to the finishing size of B2.

The present invention is not limited to the above-mentioned embodiment, but can be variously modified. Instead of attaching the gap 5 to the outside of the housing 1, the gap may be formed by notching the housing itself along one side face in the height direction. Further, the dimensions of the above-mentioned respective portions are merely examples for explanation, and the present invention is not limited to these.

[Effect of device]

As described above, according to the present invention, it is possible to position an arbitrary portion of a document of an arbitrary size within the reading range on the platen, and it is possible to read image information of a large size such as a plate collection. A planar image scanner capable of performing the above is provided.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of a flat image scanner according to the present invention. 1 ... Housing, 2 ... Magnet sheet, 3 ... Register pin, 4 ... Reading window, 5 ... Gap, 6 ... Arm, 7 ...
light source.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor, Akio Suzuki, 1-5-1, Taito, Taito-ku, Tokyo Toppan Printing Co., Ltd. (56) References Japanese Patent Publication No. 59-23670 (JP, B2)

Claims (2)

[Scope of utility model registration request] 1. A housing having a built-in photoelectric conversion means, a transparent platen provided at an upper surface of the housing and corresponding to at least the photoelectric conversion means, and an upper portion of the housing corresponding to the photoelectric conversion means. A planar image including a light source attached to the housing so as to be located at a location, and a gap portion provided in the housing between the attachment location of the light source and a location corresponding to the photoelectric conversion means to accommodate a document. Scanner. 2. A housing having a built-in photoelectric conversion means, a transparent document table provided on an upper surface of the housing and corresponding to at least the photoelectric conversion means, and a document provided on one side surface of the housing. And a light source supported at a position corresponding to the photoelectric conversion means on the upper part of the housing via an arm provided outside the gap.