JPH0480737A - Original cassette - Google Patents

Abstract

PURPOSE:To automatically confirm the sort of an original which is read by respectively forming a prescribed hole part for discrimination every mount which holds the original to be read and detecting the hole part through a transmission type optical detection sensor when this original cassette is loaded on an image reader. CONSTITUTION:The prescribed hole parts for discrimination 18a-18c, 19 and 20a-20c are respectively formed every mount 22 which holds the original S to be read. Then, when the original cassette 10 is loaded on the image reader, the hole parts 18-20 are detected through the transmission type optical detection sensor. Therefore, the sort of the original S can be automatically confirmed. Thus, even in the case that the original S whose sort is different is used, it is enough only that the mount 22 is changed. Besides, the identical original cassette 10 is effectively utilized.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a document cassette used to load various types of documents carrying image information into an image reading device.

[Prior art] In the fields of printing, plate making, etc., image scanning scanning is used to electrically process image information carried on a manuscript and create a film master plate, with the aim of streamlining work processes and improving image quality. A playback system is used.

In the image reading device that constitutes this image scanning reading and reproducing system, the original to be read that is positioned and stored in the original cassette is conveyed to the reading section, and in this reading section, the original cassette is conveyed in the sub-scanning direction and scanned with a light beam in the main scanning direction. However, this allows two-dimensional reading of image information.

This document cassette has a pair of support plates, at least one of which is made of a transparent material, and light reflected or transmitted from the document through the transparent support plates is transmitted to a CCD, etc. provided in a reading section. The photoelectric conversion element performs photoelectric conversion and reads the image information.

By the way, in order to automatically check the type of the read original stored in the original cassette, the individual number of this original cassette, etc. There is a type of reflective code marked with a combination of black and white corresponding to the above, and this code is optically detected by a reflective sensor.

[Problems to be Solved by the Invention] However, since the reflective code and the like are attached to a document cassette, this document cassette is dedicated to each type of document to be read. Therefore, especially when many types of originals are used, there is a problem in that a large number of original cassettes must be prepared for each type of original.

The present invention has been developed in view of the above-mentioned problems, and it is possible to automatically and reliably identify the type of document to be read, and also to make it possible to share the document cassette so that it can be used when many types of documents are being read. It is an object of the present invention to provide a document cassette that can be easily used.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention includes a set of supporting members, at least one of which is transparent, which holds a sheet-like original; It is characterized by comprising a mount which is placed to hold one or more original documents and has a plurality of identification holes formed therein passing from one surface to the other surface.

[Function] In the document cassette according to the present invention, a predetermined identification hole is formed for each mount that holds the document to be read, and when this document cassette is loaded into the image reading device, the transmission type light detection sensor This hole is detected through the scanner, and thereby the type of the original to be read can be automatically confirmed.

[Example] An example of a document cassette according to the present invention will be described in detail below with reference to the accompanying drawings.

In FIG. 1, reference numeral 10 indicates a document cassette according to this embodiment. This document cassette 10 includes a frame 12 formed in a substantially rectangular shape, a support glass plate 14 and a cover glass plate 16, which are a pair of support members, at least one of which is transparent, that sandwich a sheet-shaped read document S. One or more originals S to be read are placed on this supporting glass plate 14.
and a plurality of holes 18a to 18C19 and 20a to 20 that penetrate from one surface to the other.
mount 22 on which e is formed.

V-shaped grooves 24a and 24b extending along the conveyance direction (arrow X direction) are formed on both sides of the frame 12, and a cassette identification section 26 is formed on one end side where the cover glass plate 16 is supported. will be provided. As shown in FIG. 3, the cassette identification section 26 includes bit holes 28a to 28d for identifying the type of read document that penetrate from the upper surface to the lower surface of the frame 12.
1 timing detection bit holes 3D and document cassette number identification bit holes 32a to 32h are formed, and these communicate integrally with a groove 33 formed from a narrow side wall portion of the frame 12 (see FIG. 2). ).

Grooves 34a, 34b are provided at the other end of the frame 12, and two register bins 36a, 36b are formed adjacent to the grooves 34a, 34b.
A stopper member 38 that can move forward and backward is disposed between 34b,
This stopper member 38 engages with a locking portion 40 fixed to the cover glass plate 16.

The mount 22 is a sheet-like body such as a stainless steel plate, paper, or a film base, and is, for example, 135 (35
mm) The original S to be read from the film is placed in the same original cassette 1.
Square holes 42a to 42f are formed in order to set a large number of sheets in 0, and positioning convex portions 44a and 44b are provided on both sides of these square holes 42a to 42f, respectively.

A projecting piece 46 is formed at one end of the mount 22, and holes 18a to 18c, 19, and 20a to 20e are provided in this projecting piece 46. These holes 18a to 18C are
The holes 20a to 20e correspond to the bit holes 28a to 28c of the frame 12, and the holes 20a to 20e correspond to the bit holes 32a to 32.
The hole 19 corresponds to the bit hole 30 (see FIG. 3). As a result, the type of the document S to be read (eg, 135 film) and the number of the document sensor 1-10 (eg, No. 1) are set.

A pair of protrusions 48a and 48b are formed at the other end of the mount 22 to allow the operator to handle the mount 22, and holes into which register pins 36a and 36b are inserted. Sections 5Qa and 5Qb are provided.

The original to be read S is placed with adhesive tape 5 on the upper surface of the square holes 42a to 42f, with the emulsion side facing the support glass plate 14.
2, the position is fixed.

FIG. 4 shows an image reading device 60 in which a document sensor 10 is loaded. The image reading device 60 includes a cassette attachment/detachment section 62, an identification mechanism 64 for identifying the type of document S to be read, and a transport mechanism 66 for conveying the document cassette 10.
and a sub-scanning mechanism 68 for sub-scanning the document S to be read,
A trimming mechanism 70 that moves forward and backward in a predetermined direction to trim the document S to be read, a positioning mechanism 72 for fixing the position of the document sensor 10, and the document S to be read.
The image reading section 74 reads image information recorded on the image reading section 74.

The identification mechanism 64 is driven in response to an output signal from an identification mechanism driving sensor 76, and includes a light emitting section 78 and a light receiving section 80 as sensors, which are arranged to face each other with the document cassette 10 interposed therebetween. As shown in FIG. 5, the light emitting section 78 includes LEDs 1 to 3 disposed corresponding to the bit holes 28a to 28d, 30, and 32a to 32h provided in the cassette identification section 26 of the document sensor 10.
The light receiving section 80 includes phototransistors PTl to PT1 that receive light from the LEDI to LED13.
It has 3.

The conveyance mechanism 66 moves the document cassette 10 in the direction of arrow X under the action of a guide roller 82 that engages with the inner wall surfaces of the V-shaped grooves 24a and 24b formed in the document cassette 10 through point contact, and a rotational drive source 84. A plurality of conveyance rollers 86 are provided.

The sub-scanning mechanism 68 includes a rotational drive source 88 and a ball screw 9.
0, and a trimming mechanism 70 is provided on the document table 92, which is movable in the direction of arrow X (sub-scanning direction). This trimming mechanism 70 has a rotational drive source 94 attached to a document table 92, and the rotational operation of this rotational drive source 94 is transmitted to the trim table 98 through a ball screw 96.
As a result, the trim table 98 moves forward and backward in the trimming direction (direction perpendicular to the sub-scanning direction).

The positioning mechanism 72 has a rotary drive source 100 fixed to the bottom surface of the trim base 98, and this rotary drive source 1000
The document cassette 10 is fixed to the rotary table 10 by a locking plate 104 that is rotated via a cam plate 102 that is connected to a rotating shaft.
It is positioned and fixed at 6.

The image reading unit 74 includes a light source 108 that extends in the main scanning direction that is substantially orthogonal to the arrow X direction (sub-scanning direction), and an imaging lens that can move forward and backward in the optical axis direction under the driving action of a rotary drive source 110. 112 , and a photoelectric conversion unit 116 that can move forward and backward with respect to the imaging lens 112 under the driving action of the rotational drive source 114 .
Equipped with. The photoelectric conversion unit 116 reads the color image information recorded on the read document S as image information corresponding to each color of RSG and B.

Next, the operations of the document cassette 10 and the image reading device 60 configured as described above will be explained.

First, a desired document S to be read is placed on the upper surface of the square holes 42a to 42f of the mount 22, which has holes 18a to 18c, 19 and 20a to 20e corresponding to the document S to be read and the document cassette 10, using adhesive tape 52. The position is fixed. At this time, convex portions 44a and 44b are provided on both sides of the polygonal holes 42a to 42f, respectively, and the original document S to be read is accurately positioned via the convex portions 44a and 44b.

The mount 22 has the register bins 36a in the holes 50a and 50b,
36b is inserted and placed on the support glass plate 14, and the projecting piece 46 of this mount 22 is arranged in the groove 33 of the frame 12. In addition, the bit holes 28d and 32f to 3 of the separate part 26 of the cassette 11 provided in the t1 frame 12
2h is closed, and the read original S is placed in this cassette identification section 26.
The type of document cassette 10 and the number of the document cassette 10 are marked (see FIGS. 3 and 5).

That is, in this embodiment, in order to close (open) any one of the bit holes 28a to 28d and 32a to 32h of the cassette identification section 26, depending on the type of the document S to be read and the number of the document cassette 10, Holes 18a to 18c, 20a to 20e, etc. corresponding to these are formed. Therefore, there is no need to prepare dedicated original cassettes for each type of originals S to be read, and the same original cassette 10 can be used for various different originals S to be read. This makes it possible to avoid the complexity of management work and the rise in manufacturing costs that occur when using a dedicated document cassette.

Next, the operation of the image reading device 60 will be roughly described.
The document cassette 10 is inserted into the image reading device 60 from the cassette attachment/detachment section 62, and the conveyance roller 86 starts carrying the document cassette 10 under the driving action of the rotational drive source 84.

When the leading end of the original cassette 10 passes through the identification mechanism 64 and reaches the identification mechanism driving sensor 76, the identification mechanism 64 starts the operation of identifying the original cassette 10.

That is, when illumination light is emitted from LEDl to LEDl3 of the light emitting unit 78 to the bit holes 28a to 28d, 30 and 32a to 32h of the original cassette 10, the bit holes 28a to 28C (18a to 18C) which are open are emitted.
, 30 (19) and 32a to 32e (20a to 20e), the illumination light passes through the phototransistor PTI.
PT3 to PT3, PT5 to PTIO are reached.

At this time, when the illumination light emitted from the LED 5 reaches the phototransistor PT5, the signals from the phototransistors PTI to PT3 and PT6 to PTIO are latched, thereby confirming the type of the document S to be read and the number of the document cassette 10. The confirmation operation becomes reliable.

Next, the document cassette 10 transported to the rotary table 106 via the transport mechanism 66 is fixed to the rotary table 106 by the positioning mechanism 72, and is rotated and trimmed as necessary.

Then, the sub-scanning mechanism 68 is driven, the document table 92 is transported in the sub-scanning direction (arrow X direction), and the light source 10
8 is energized, the color image information carried on the document S to be read is taken out as an optical signal, and all of it is read by the photoelectric conversion section 116.

After the reading work of the original S to be read is completed, the original cassette 10 is
is led out from the cassette attachment/detachment section 62.

By the way, when the original document S to be read is a 120 (Browny) film, a mount 22a is used as shown in FIG. This mount 22a has two square holes 120a, 120
positioning convex portions 122a to 122C are provided to sandwich the square holes 120a and 120b. The projecting piece 46a of the mount 22a has bit holes 28a to 28d, 30 and 32a of the cassette identification section 26.
In order to open the desired bit holes from 32h to 32h, the holes 124
a, 126 and 128a to 128C are formed.

In this embodiment, the bit hole 2 is provided in the cassette identification section 26.
8a to 28d, 30 and 32a to 32h are provided, but these bit holes 28a to 28d and 32
Each of a to 32h may be replaced by a single long hole.

Furthermore, without providing the cassette identification section 26 on the frame 12 (
It is also possible to directly irradiate light from the light emitting section 78 onto the projecting piece 46 (46a) of the mount 22 (22a).

[Effects of the Invention] As described above, the document cassette according to the present invention has the following effects and advantages.

A predetermined identification hole is formed in each mount that holds the original to be read, and when this original cassette is loaded into the image reading device, this hole is detected via a transmission type light detection sensor, and the identification hole is detected. The type of the document to be read can be automatically confirmed by the above-described method. Therefore, even when different types of originals are used, it is only necessary to change the mount, and the same original cassette can be used effectively.

[Brief explanation of the drawing]

1 is a perspective explanatory view of a document cassette according to the present invention; FIG. 2 is a sectional view taken along the line ■-■ in FIG. 1; FIG. FIG. 5 is an explanatory diagram of the operation of the identification mechanism, and FIG. 6 is a plan explanatory diagram of a mount according to another embodiment. 10... Original cassette 12... Frame bodies 18a to 18c, 19. 20a to 20e... Hole portion 22
．． 22a... Mount 26... Cassette identification parts 28a to 28d, 30. 32a to 32h... Bit holes 42a to 42f... Square holes 44a, 44b = Convex portion 60... Image reading device 64 . . . Identification mechanism 66 . . . Conveyance mechanism 68 . . . Sub-scanning mechanism 74 . - Hole FIG, 5 LI: Llb Shi I: Shirishihi L111 122c Procedural amendment (voluntary) February 16, 1991 1゜Display of incident 2000 Patent Application No. 195771 2゜Name of invention Manuscript cassette Intermediation with the case of the person making the amendment

Claims (1)

[Claims] (1) A set of supporting members, at least one of which is transparent, which holds a sheet-like original, and a set of supporting members, at least one of which is transparent, which is placed on the one supporting member to hold one or more originals, and which supports the document from one side to the other. A document cassette comprising: a mount having a plurality of identification holes formed through the surface thereof;