JPH03189639A - Original cassette - Google Patents

Abstract

PURPOSE:To arrange plural originals without positional deviation by engaging a through-hole formed on a mount with an engaging means formed on a frame body. CONSTITUTION:An original cassette 100 is composed of the frame body 106, a supporting glass plate 112 loaded to the opening part 110 of the almost central part of the frame body, and a cover glass plate 114 opening or closing the opening part 110, and resister pins 102a and 102b are projectingly provided on the frame body 106. The mount 130 is prepared in such a manner that square holes 134a - 134d capable of setting four originals S such as 35mm films in a shape of a sheet and the through-holes 132a and 132b are formed. Thus, only by positioning and fixing the original S at the mount 130 and engaging the holes 132a and 132b with the pins 120a and 120b, the original S can be accurate ly set.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a document cassette that is used in an image reading device and is suitably used when accurately positioning and setting a document carrying image information.

[Prior Art] In the fields of printing, plate making, etc., for the purpose of streamlining work processes and improving image quality, a manuscript is created as a film master by electrically processing image information and recording it on the manuscript. An image scanning reading/reproducing system is adopted.

The image reading device, which is the main body of the image scanning reading and reproducing system, transports a document positioned and stored in a document cassette, such as a developed film, to a reading section, and the reading section transports the document cassette that carries the document. While being conveyed in the sub-scanning direction, main scanning is performed using a light beam, thereby reading image information two-dimensionally.

The applicant has already proposed a new document cassette for use in such an image scanning reading/reproducing system and has filed a patent application.

In this case, the document cassette has a pair of support plates, at least one of which is made of a transparent material, and the light reflected or transmitted from the document through the transparent support plates is provided in the reading section. Image information is read by being photoelectrically converted by an optical/electrical conversion element such as a CCD.

At that time, the original is set in the original cassette by directly positioning and placing it on the support plate, and the original cassette with the original set is pre-scanned by the image reading device, then - the star image recording device The image is extracted from the image recording apparatus, loaded into the image recording device again, and subjected to main scanning.

Therefore, each time a different original is set, a different original cassette is required, which increases the number of original cassettes, which is obviously not economical.

Furthermore, when a plurality of originals are set in the original cassette, the operator must position the originals on the support plate, making accurate positioning difficult. Moreover, when the original cassette is loaded into the image recording device again after preliminary scanning, the original is often misaligned inside the original cassette, and main scanning is performed based on the information obtained from preliminary scanning. There is a risk that the image will not be read accurately when attempting to read the image.

[Problems to be Solved by the Invention] The present invention has been made in view of the above, and its purpose is to reduce the number of manuscript cassettes that are always kept as much as possible, and to reduce the number of manuscript cassettes that are kept at all times to a minimum. To provide a document cassette for reading image information in which a plurality of documents can be accurately placed without positional deviation.

[Means for Solving the Problems] In order to achieve the above object, a document cassette according to the present invention includes: a transparent support plate on which a sheet-like document is placed; a frame body to which the support plate is fixed; a mount placed on the support plate to hold one or more documents; and a locking means for positioning and holding the mount in cooperation with the mount on the frame. It is characterized by providing.

[Function] In the original cassette according to the present invention, the mount that holds the original is positioned and held by the locking means formed on the frame, so the original held on the mount is always in a constant position and will not be displaced. This makes it possible to read image information accurately and precisely.

[Embodiments] Next, preferred embodiments of the document cassette according to the present invention will be described in detail with reference to the accompanying drawings.

First, FIG. 1 shows an image reading apparatus 10 for reading an image of a document, preferably a developed film, using a document cassette. The device 10 includes a cassette attachment/detachment section I
2, an identification mechanism 20 for identifying the type of document S, a transport mechanism 28 for conveying the document cassette 100, a sub-scanning mechanism 36 for sub-scanning the document S, and a predetermined mechanism for trimming the document S. Trimming mechanism 4 that moves forward and backward in the direction
4, a positioning mechanism 56 for positioning and fixing the document S (document S) 100, and an image reading section 68 for reading image information recorded on the document S.

The cassette attachment/detachment section 12 is provided near one end side of the upper part of the casing 14 of the apparatus 10, and the document cassette 100 is configured to be able to be introduced into and taken out of the casing 14 via the cassette attachment/detachment section 12.

On the other hand, the identification mechanism 20 is disposed near the cassette insertion opening 16 provided close to the cassette attachment/detachment section 12, and is driven in response to an output signal from the identification mechanism driving sensor 22. In this case, the identification mechanism 20 includes a light-emitting section 24 and a light-receiving section 26 as sensors, which are arranged opposite to each other with the document cassette 100 in between. It has a plurality of LEDs that are arranged corresponding to the plurality of holes provided and emit light in the direction of the light receiving section 26. The light receiving section 26 is equipped with a plurality of phototransistors that receive light emitted from the LED.

Note that there is a document cassette 1 near the cassette insertion opening 16.
A cassette detection sensor 18 is provided to detect whether or not cassette 00 is set in the device 10.

The conveyance mechanism 28 includes a frame 30 and a plurality of guide rollers 32 supported by the frame 30. Each of these guide rollers 32 has an arcuate cross section and is indicated by a broken line in FIG. As such, it engages with the inner wall surfaces of the 7-shaped grooves 104a and 104b formed in the document cassette 100 by point contact. Therefore, the document cassette 100 can be transported in a predetermined direction by the guide roller 32.

A plurality of conveyance rollers 34 are supported on the frame 30 along the conveyance direction of the document cassette 100.
06, and are each rotated by a rotation transmission mechanism 31 consisting of a belt and a roller under the urging action of a rotation drive source 29.

Note that one end of the transport mechanism 28 is disposed near the identification mechanism 20, and the other end extends above a rotary table 54, which will be described later.

In the sub-scanning mechanism 36, a rotary drive source 40 moves the document table 3 through a ball screw 42 below the transport mechanism 28.
8 is configured to be movable in the direction of arrow X (sub-scanning direction) in FIG.

The document table 38 is provided with a trimming mechanism 44 . The trimming mechanism 44 has a rotational drive source 46 attached to the document table 38, and the rotational operation of the rotational drive source 46 is transmitted to the trim table 50 via the ball screw 48, so that the trim table 50 performs the trimming process. It moves forward and backward in the direction (direction perpendicular to the sub-scanning direction). In addition, the ball screw 48
One end is connected to a rotational drive source 46, and this ball screw 48 extends in the trimming direction, and is attached to the trim base 5.
0, and the other end is rotatably supported on the document table 38.

The positioning mechanism 56 has a rotational drive source 58 fixed to the lower surface of the trim base 50, and a locking plate 6 that is rotated via a cam plate 60 that is attached to a rotation shaft of the rotational drive source 58.
2, the document cassette 100 is positioned and fixed.

The positioning mechanism 56 rotates the original cassette 100 relative to the trim table 50 with respect to a rotary table 54 provided in a rotation mechanism 52 that rotates the original cassette 100 by a predetermined angle.
It is driven when positioning and holding 00.

The image reading unit 68 has a light source 64 that extends in the main scanning direction that is substantially orthogonal to the arrow The light is input to the optical/electrical converter 72 such as the above. The image reading unit 68 includes an imaging lens 70 that can move forward and backward with respect to the optical axis direction under the driving action of a rotational driving source 74, and a light beam that can move forward and backward with respect to the imaging lens 70 under the driving action of a rotational driving source 76. An electrical conversion section 72 is provided. Note that the optical/electrical converter 72 reads the color image information recorded on the document S as image information corresponding to each color of R, G, and B.

Next, the document cassette 100 used in the image reading apparatus 10 configured as described above will be described.

As can be understood from FIG. 2, the original cassette 100 is
A frame 106 formed in a substantially rectangular shape, a supporting glass plate 112 attached to a rectangular opening 110 defined in the center of the frame 106, and a supporting glass plate 112 attached to the frame 106 via a hinge 107. It has a cover glass plate 114 attached thereto and capable of opening or closing the opening 110.

As shown in FIG. 3, when the cover glass plate 114 closes the opening 110, the cover glass plate 11
4 and a supporting glass plate 112 face each other in a substantially parallel attitude, and between the two glass plates 112 and 114, a document S integrated with a mount, which will be described later, is held.

Note that the document cassette 100 has a cassette identification section 102.
is provided.

Therefore, two register bins 120a and 120b as protrusions are protruded from the frame 106 at predetermined positions in the width direction perpendicular to the direction of arrow X, which is the transport direction. In this case, the register bins 120a, 120b are formed by two through holes 1 defined in a very thin film-like mount 130 shown in FIG.
32a and 132b, respectively. That is, register bin 120a.

The shape of the mount 1300 through holes 132a, 13
It goes without saying that the shape of the mount 130 can be cylindrical, prismatic, elliptical, or any other shape as long as it can be engaged with the mount 2b and prevent the mount 130 from shifting its position within the document cassette 100. . For example, as shown in FIG. 4, the through hole 132a has a circular planar shape, while the through hole 132b
is a plane ellipse. This through hole 132b is the through hole 13
This is because when the register bin 120a is inserted into the register 2a, the other register bin 120b can be easily inserted.

On the other hand, the mount 130 has square holes 134a to 134d for positioning and fixing the original S to a sheet-like body such as paper or a film base when, for example, four sheets of 135 (35 mm) film are set in the same original cassette 100. A set of protrusions 136a and 136b for an operator to handle the mount 130 are formed at the ends thereof.

In this case, the original S is positioned and fixed in the square holes 134a to 134d with adhesive tape 138 or the like, with its emulsion side facing the support glass plate 112. If you do this by placing it on top of the
suitable. At that time, the mount 1300 through holes 132a, 1
If a jig having a protrusion that can be engaged with the sheet 32b is prepared, it is possible to easily position the document S on the sheet metal sheet, which is preferable.

In FIG. 2, reference numerals 106a and 106b indicate holes into which the operator inserts his fingers in order to handle the document cassette 100.

Next, the structure of the mount 130 will be explained. The mount 130 varies depending on the size of the document S to be selected.
As can be understood from FIG. 5, the shape is such that a plurality of documents S of different sizes can be fixed to the mount 130, and the shape is 4”.
In the case of x5'' film, as can be understood from FIG. 6, it is sufficient to form a mount 130 so that a single document S can be fixed thereon.

In this way, the mount 130 has square holes 134a to 13.
4d or other holes are not necessarily defined, and any configuration that allows the document S to be accurately positioned and fixed relative to the mount 130 is sufficient. Moreover, by making the mount 130 black, for example, it can also be used as a mask for preventing flare.

Further, when the mount 130 is made of a transparent material such as a film base, when a plurality of professional 12 size films are to be fixed to the mount 130, as shown in FIG. without defining
The document S may be attached and fixed directly onto the mount 130 using an adhesive tape 138.

In addition, as shown in FIG. 8, square holes 134a to 134d
The size of the document S may be smaller than the size of the document S, and between the image portion and the path, or slightly larger, and may be attached and fixed with the document S placed on the mount 130.

As described above, according to this embodiment, the mount 130 is formed into an appropriate shape corresponding to the number of originals S to be set in the original cassette 100. The original S can be positioned and fixed on the mount 130 before being set in the original cassette 100. At that time, the mount 130 includes a through hole 132a that engages with register pins 120a and 120b formed in the original cassette 100,
132b, the operator can position and fix the document S in the document cassette 100 simply by engaging the register pins 120a, 120b with the through holes 132a, 132b, respectively.

Therefore, unlike in the past, even if the number of originals S increases, there is no need to prepare original cassettes 100 according to the number of originals. can be read. Therefore, it is economical, easy to handle, and does not occupy a large amount of storage space in the document cassette 100.

Furthermore, if the original S is accurately positioned with respect to the mount 130 on the sheet metal sheet, the register pins 120a, 12
The document S can be accurately positioned in the document cassette 100 simply by engaging the through holes 132a and 132b with each other. Therefore, even if the original cassette 100 is wiped from the image reading device after preliminary scanning and is loaded into the image reading device again for main scanning, the original S is prevented from being displaced within the original cassette 100. Therefore, the image information recorded on the document S can be read in good condition.

[Effects of the Invention] As understood from the above description, the document cassette according to the present invention has a plurality of protrusions that each engage with at least two through holes formed in the mount as engagement means. . Therefore, the original is positioned and fixed on the mount, and then
By simply engaging the through-hole of the mount with a protrusion formed on the original cassette, the original can be accurately positioned and fixed to the original cassette.

Moreover, since multiple originals can be fixed to the mount and positioned in the original cassettes, there is no need to increase the number of original cassettes to match the number of originals, unlike in the past. .

In addition, the operator simply positions and fixes the document on the mount and inserts the mount into the document cassette.
Accurate positioning can be performed. Therefore, even if the original cassette is moved or accidentally dropped, as in the case from preliminary scanning to main scanning, the position of the original will not shift. In the end, the main scan can be suitably performed based on the information obtained in the preliminary scan, thereby making it possible to read accurate image information.

[Brief explanation of drawings]

FIG. 1 is an overall schematic explanatory diagram of an image reading device according to the present invention, FIG. 2 is a perspective explanatory diagram of the document cassette shown in FIG. 1, and FIG. 3 is an engagement between the document cassette and the mount in the embodiment of the present invention. FIG. 4 is a plan view of a mount according to an embodiment of the present invention; FIG. 5 is a plan view of a mount according to another embodiment of the present invention; FIG. 6 is a plan view of a mount according to another embodiment of the present invention; 7 and 8 are schematic longitudinal sectional views showing the engagement relationship between a mount and a document according to another embodiment of the present invention. FIGS. 0...Image reading device 2...Cassette attachment/detachment unit 0...Identification mechanism 8...Transportation mechanism 6...Sub-scanning mechanism 4...Trimming mechanism 6...Positioning mechanism 8...Image Reading unit 00... Original cassette 06... Frame 12... Support glass plate 14... Cover glass plates 20a, 120b... Register pin 1 30... Mount FfG, 3 FfG, 7 FIG, 8

Claims (1)

[Claims] (1) A transparent support plate on which a sheet-like original is placed, a frame to which the support plate is fixed, and a mount placed on the support plate and holding one or more originals; , wherein the frame body is provided with locking means for positioning and holding the mount in cooperation with the mount.