JPH0954419A - Image input device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the mounting workability of an original by making it possible to easily mount the original at the image input device of a color scanner. SOLUTION: The original holding member 1 of this image input device has an outer cylindrical member 7 disposed concentrically with the revolving shaft of a rotary driving section and an inner cylindrical part 10 disposed concentrically and freely relatively turnably on the inner side of this outer cylindrical part 7. Both cylindrical parts 7, 10 are provided with an outer scanning aperture 12 and inner scanning aperture 13 penetrating the diametral direction in the same positions in the axial direction. The outer cylindrical part 7 is provided with an original insertion port 14 in the circumferential direction of its scanning aperture 12 and the inner cylindrical part 10 is provided with a detaining means for detaining the end of the original inserted from the original insertion port at the circumferential end of its scanning aperture 13. A spacing 26 for mounting the original detained to this detaining means by relatively turning the inner cylindrical part 10 is formed between the outer cylindrical part 7 and the inner cylindrical part 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image input device for a color scanner.

[0002]

2. Description of the Related Art A color scanner is a device for producing a color-corrected separation negative or separation positive from an original such as a photographed color (including black and white) film or printing paper. An image input device for scanning, converting transmitted light or reflected light obtained by scanning and converting it into an electrical signal, and a computer for performing various arithmetic processes on the electrical signal output from the image input device. ,
It is composed of an image output device for converting an electrical signal output from the computer into an optical signal and exposing the film.

The image input device is, for example, as shown in FIG. 5, a rotary drum 101 for mounting an original 100.
A rotary drive unit 102 for rotating the rotary drum 101; a light irradiation arm (not shown) for irradiating the original 100 mounted on the outer peripheral surface of the rotary drum 101 with white light; A scanning head (not shown) for detecting transmitted light or reflected light is provided. The light irradiation arm and the scanning head form a pair to form a detection unit. When detecting transmitted light, the light irradiation unit of the light irradiation arm is provided in the rotary drum 101, and the light irradiation unit and the scanning head are connected to each other. Are arranged in the radial direction (radial direction) with respect to the axis of rotation. Also, both are laterally fed by an axial feed device,
By this lateral feed and the rotation of the rotary drum 101, the image data of each part of the document is optically scanned and detected.

The rotary drum 101 includes a rotary drive unit 10
2 is composed of a substrate portion 103 for detachable connection, and a drum body 104 concentrically provided with respect to the rotation axis of the substrate portion 103. The original 100 is mounted on the outer peripheral surface of the drum body 104. To be done. The drum body 104 is usually made of transparent hard plastic, glass, or the like.
A bayonet mount structure used for an interchangeable lens, for example, is applied as a connecting means for detachably connecting to the rotation driving unit 102.

[0005] Normally, the original document has the rotary drum 101 removed from the rotary drive unit 102 and the drum main body 10 described above.
4 directly on the outer peripheral surface or through an appropriate holder as disclosed in Japanese Utility Model Laid-Open No. 4-135759.
It is mounted by fixing its peripheral portion with an adhesive tape or the like. In addition, in order to improve the operation rate of the scanner, a plurality of rotating drums 101 are prepared, and while one rotating drum 101 is connected to the rotation driving unit 102 to input an image, another rotating drum 101 is connected to another rotating drum 101. It is also performed to preload the original.

[0006]

In the conventional drum-type image input device, when the outer peripheral surface of the drum main body wobbles during rotation of the rotary drum, the accuracy of color separation decreases, so that the rigidity of the drum main body and the substrate is reduced. It needs to be increased, which inevitably increases the weight of the rotating drum. Therefore, a great deal of labor is required to attach and detach the rotary drum to and from the rotary drive unit.

When mounting the original on the outer peripheral surface of the drum main body, it is essential to attach the peripheral edge of the original or the holder holding the original to the outer peripheral surface of the drum main body with an adhesive tape or the like. The work is difficult because of the large weight. Moreover, in order to reduce the work effort, a dedicated holding device is required.

The present invention has been made to solve the above problems, and an image input device which can easily and easily attach a document to the image input device and is excellent in workability of attaching the document is provided. provide.

[0009]

An image input apparatus of the present invention detects a rotation drive unit, a document holding member connected to the rotation drive unit, and image data of a document held by the document holding member. An image input device comprising a detection means,
The original holding member includes an outer cylindrical portion concentrically provided on a rotation shaft of a rotation driving unit and an inner cylindrical portion concentrically and relatively rotatably provided inside the outer cylindrical portion. Portion and the inner cylindrical portion are provided with an outer scanning opening portion and an inner scanning opening portion penetrating in the radial direction at the same position in the axial direction, and the scanning opening portion is provided in either one of the outer cylindrical portion or the inner cylindrical portion. An original insertion port is provided in the circumferential direction of the portion, and the other cylindrical portion is the circumferential end of the scanning opening and the end of the original inserted from the original insertion port on the side away from the original insertion port. Locking means for locking the part is provided,
The original locked by the locking means is mounted between the outer cylindrical part and the inner cylindrical part by relatively rotating the cylindrical part on the side provided with the locking means to the side away from the document insertion port. A gap is formed for this.

According to the image input device of the present invention, one of the outer cylindrical portion and the inner cylindrical portion (referred to as a first cylindrical portion) is provided with the other cylindrical portion (referred to as a second cylindrical portion). With relative rotation, the locking means provided on the second cylindrical portion is arranged so as to face the document insertion opening provided on the first cylindrical portion,
A document is inserted through the document insertion port, the end of the document is locked by the locking means, and the second cylindrical portion is opposite to the document insertion port, that is, on the side away from the document insertion port with respect to the first cylindrical portion. When relatively rotated, the document whose end is locked by the locking means covers the scanning opening of the second cylindrical portion and is mounted while being drawn into the gap between the first cylindrical portion and the second cylindrical portion. .

Then, when the relative rotation is stopped at a position where the scanning opening of the second cylindrical portion faces the scanning opening of the first cylindrical portion, the document is exposed to both scanning openings. In this state, both cylindrical parts are simultaneously rotated to scan each part of the document exposed at the scanning opening. As described above, according to the present invention, it is not necessary to attach / detach the document holding member to / from the rotation driving unit each time the document is mounted, and the document is first moved without using a special mounting jig or a document holder. It can be easily and easily attached to the gap between the cylindrical portion and the second cylindrical portion, and thus to the image input device.

In the image input device, the second cylindrical portion is rotated relative to the document insertion opening side to take out the circumferential end of the original document locked by the first cylindrical portion from the document insertion opening. By providing the document take-out means for reading the document at the document insertion opening of the first cylindrical portion, the second cylindrical portion is only relatively rotated to the document insertion opening side of the first cylindrical portion after scanning the original, and only the original is inserted. And can be taken out easily,
The document mounting work can be performed more easily.

The first and second cylindrical portions do not have to be cylindrical bodies having a peripheral wall around the rotation axis as an axis,
As long as the scanning opening and the document insertion opening are provided in the first cylindrical portion, while the scanning opening and the locking means are provided in the second cylindrical portion, a partial cylindrical body having a peripheral wall in a part in the circumferential direction may be used. . However, by constructing the cylindrical part with a cylindrical body that has a peripheral wall all around, easy processing and rotation stability can be obtained, and large originals such as reflective originals should be attached to the outer peripheral surface with adhesive tape or the like. There is an advantage that can be.

From the viewpoint of ensuring detection accuracy, it is necessary that the distance between the original and the scanning head is the same, and thus it is required that the distance from the rotation axis to each part of the original is equal. As long as an original exists within the permissible range of the depth of focus of the reading lens included in the scanning head, that is, between the two cylindrical surfaces passing through the permissible limit points of the radial depth of focus, there is a problem in detecting image data. There is no. Therefore, the diameters of the inner peripheral surface of the outer cylindrical portion and the outer peripheral surface of the inner cylindrical portion are set so that the clearance is within the allowable range of the depth of focus.

[0015]

1 and 2 show a document holding member 1 of an image input apparatus according to an embodiment of the present invention.
The image input device is provided with a rotation drive unit for rotating the original document holding member 1 and a detection unit for scanning and detecting image data of the original document mounted on the original document holding member 1. The description is omitted because it is the same.

The document holding member 1 is composed of an outer holding member 3 attached to a rotary drive unit, and an inner holding member 4 arranged inside the outer holding member 3 and concentrically rotatable. . The outer holding member 3 is provided with an outer substrate portion 6 connected to a rotation driving portion, and an outer cylindrical portion 7 having a cylindrical shape that is fixed to the outer peripheral portion of the substrate portion 6 concentrically with the rotation axis. The inner holding member 4 is connected to the outer substrate 6 via a bearing 8 and an inner substrate 9 is a cylindrical inner cylinder that is fixed to the outer periphery of the inner substrate 9 concentrically with the rotation axis. A section 10 is provided. The axially open end of the inner cylindrical portion 10 extends outward from the open end of the outer cylindrical portion 7, and the inner cylindrical portion 10 can be easily attached to the outer cylindrical portion 7 by using the extended portion. It can rotate. A bayonet mount can be applied as the connecting means to the rotary drive unit as in the conventional case, but may be directly fixed to the rotary shaft of the rotary drive unit by using a key, a bolt or the like.
Further, although the outer substrate portion 6 is attached to the rotation driving portion in the above description, the inner substrate portion 6 may be attached to the rotation driving portion.

The outer cylindrical portion 7 and the inner cylindrical portion 10 are provided with a rectangular outer scanning opening 12 and a rectangular inner scanning opening 13 at the same axial position along the circumferential direction. These openings 12 and 13 are formed to be smaller than the document size and larger than the scanning area of the detecting means, and a document having a width wider than the opening 12 is inserted into one end of the outer scanning opening 12 in the circumferential direction. The mouths 14 are opened adjacent to each other, and the ends thereof are inclined surfaces, and the insertion plate 15 is attached along the inclined surfaces.

As shown in FIG. 3, the outer peripheral surface of the inner cylindrical portion 10 has an outer peripheral edge slightly larger than the original 50,
A document mounting recess 17 slightly deeper than the thickness of the document is formed,
The inner scanning opening 13 is opened in the center of the opening. Further, on the outer peripheral surface of the inner cylindrical portion 10, outside the axial ends of the inner scanning opening 13 and inside the axial ends of the document insertion opening 14 along the entire circumferential direction, the document mounting recess 1 is formed.
Document take-out grooves 18, 18 having a bottom surface deeper than 7 are formed. Into the document take-out grooves 18, 18, a document take-out claw 19 protruding from the lower end of the insertion plate 15 is inserted. It should be noted that the document take-out grooves 18, 18 are at positions where the inner scanning opening 13 faces the outer scanning opening 12 as shown in FIG. 3 and FIG.
, The front end of the inner scanning opening 13 (the document insertion opening 14
It should be provided up to about the opposite end). However, for the convenience of processing, it may be formed over the entire outer circumference of the inner cylindrical portion 10.

Further, as shown in FIG. 3, the inner cylindrical portion 10
On the document mounting recess 17 of the above, the locking means 22 is provided at the front end of the inner scanning opening 13 with holding portions 21 and 21 for sandwiching both front end portions of the document 50 in the circumferential direction with the upper surface of the recess 17.
Is provided. The locking means 22 is formed by using a leaf spring material, and both ends thereof are bent and bent, and a cushioning material such as rubber is attached to the lower surface thereof to form the holding portions 21 and 21. The central portion is provided with a convex portion 23 for contacting and positioning the front end portion of the document.

As shown in FIG. 4, on the inner peripheral surface of the outer cylindrical portion 7, the upper portions of the holding portions 21 and 21 are held with the holding portions 21 and 21 sandwiching both front end portions of the document 50. Receiving grooves 24, 24 for accommodating against the elastic force of the spring are recessed. The accommodation groove 24 may be provided at least between the document insertion opening 14 and the locking means 22 at the document scanning position. However, for the convenience of processing, it may be formed over the entire inner circumference of the outer cylindrical portion 7.

As shown in FIG. 2, the outer cylindrical portion 7 has the inner cylindrical portion 1 with respect to the outer cylindrical portion 7.
A ball plunger 25, which is a locking means for positioning 0 at the document scanning position, is provided. Similarly,
As shown in FIG. 4 (B), the upper portion of the holding portion 21 of the locking means 22 provided on the inner cylindrical portion 10 rises up inside the document insertion opening 14, and between the lower surface thereof and the lower surface of the document mounting recess 17. A ball plunger for positioning the inner cylindrical portion 10 is separately provided at a position where the insertion gap of the document 50 is formed (referred to as a document insertion position). Of course,
On the outer peripheral surface of the inner cylindrical portion 10, there is formed a concave portion provided at the tip of the ball plunger to engage with the ball that is elastically exposed. The locking means is not limited to the ball plunger 25, and an appropriate screw member may be used.

According to the above embodiment, first, FIG.
As shown in FIG. 2, the inner cylindrical portion 10 is rotated to be positioned at the original insertion position, and the original 50 is placed in the original insertion opening 1 of the outer cylindrical portion 7.
4 and inserts it into the gap between the holding portion 21 and the upper surface of the document mounting concave portion 17 until the front edge thereof comes into contact with the front end of the convex portion 23 of the locking means 22.

Then, when the inner cylindrical portion 10 is relatively rotated in the direction in which the holding portion 21 moves away from the document insertion port 14, the upper surface of the holding portion 21 is accommodated in the accommodating groove 24 provided in the outer cylindrical portion 7.
And the holding portion 21 is pushed downward against the elastic force, and the front end of the document 50 is sandwiched between the lower surface of the holding portion 21 and the upper surface of the document mounting recess 17.

Further, as the inner cylindrical portion 10 is rotated, the original 50 is placed on the upper surface of the original mounting recess 17 and the outer cylindrical portion 7.
It is drawn into a document mounting gap 26 formed between itself and the inner surface. When the inner cylindrical portion 10 reaches the document scanning position shown in FIG. 4A, it is positioned by the ball plunger 25, and the central portion of the document 50 is exposed to the outer scanning opening 12 and the inner scanning opening 13. .

Then, the rotation driving section is operated to rotate both cylindrical sections 7 and 10 at the same time, and the image data of the document 50 exposed in the outer scanning opening 12 and the inner scanning opening 13 is scanned by the detecting means. To detect. At this time, the original 5
Since 0 is scanned directly, Newton's rings do not occur.

After the end of scanning, when the inner cylindrical portion 10 is rotated relative to the original insertion port 14 side, the rear end of the original 50 comes into contact with the upper surface of the original take-out pawl 19 inserted in the original take-out groove 18 and is further rotated. As the document moves, the rear end of the document 50 is ejected upward along the upper surface of the insertion plate 15 from the document ejecting claw 19. Then, when the inner cylindrical portion 10 returns to the original insertion position, the front end of the original 50 is released from the holding state by the holding portion 21, and the original 50 can be easily taken out from the original insertion port 14.

The present invention is not limited to the above-described embodiment. For example, the document insertion port does not need to be provided adjacent to the outer scanning opening 12 as shown in the drawing, and the outer scanning opening 12 is separated in the circumferential direction. You may provide in a position. Further, the outer scanning opening 12 and the inner scanning opening 13 are arranged in the circumferential direction by 1 as shown in the figure.
Not limited to individual pieces, a plurality of pieces may be provided. In this case, the front end of each inner scanning opening 13 is provided with a document end locking means. The document insertion port may be provided adjacent to each outer scanning opening 12, but only one is sufficient. Further, one or a plurality of outer scanning openings and inner scanning openings having different sizes in the axial direction may be arranged side by side in the circumferential direction. Also in this case, locking means for the document end is provided at the front end of each inner scanning opening.

The configuration of the inner cylindrical portion 10 and the outer cylindrical portion 7 in the above-described mode is reversed, and the inner cylindrical portion 10 is provided with a document insertion port or accommodating groove provided with an insertion plate having a document take-out pawl. A locking means or the document take-out groove may be provided on the inner surface of the outer cylindrical portion 7. In this case, due to the rotation during scanning, the original is stuck to the inner peripheral surface of the outer cylindrical portion 7 due to the centrifugal force, so that the detection accuracy is improved.

Further, the outer cylindrical portion 7 and the inner cylindrical portion 10
Is not limited to the cylindrical body in which the peripheral wall is formed over the entire area in the circumferential direction as in the above aspect, but the outer scanning opening, the document insertion opening, the inner scanning opening, the document mounting recess 17 and the like are formed in a part of the circumferential direction. It may be a partial cylinder with a peripheral wall that can be formed. In this case, even if the document insertion port is provided on the inner cylindrical portion side, the document can be easily inserted and removed from the inner surface side of the inner cylindrical portion.

[0030]

According to the image input apparatus of the present invention, a manuscript is inserted into the manuscript into the gap formed between the manuscripts only by inserting the manuscript through the manuscript insertion port and rotating the outer cylinder part or the inner cylinder part. The document holder holding member does not need to be attached / detached to / from the rotation driving unit when the document is attached, and the document holder is not necessary. Therefore, the document can be easily and easily attached to the document holding member and thus the image input device. It is possible and has excellent workability. Further, by providing the document take-out means at the document insertion port, not only the document can be inserted but also the document can be taken out easily. Further, by constructing the outer cylindrical portion and the inner cylindrical portion with a cylindrical body having a peripheral wall all around, easiness of processing and rotation stability can be obtained, and a large original such as a reflective original is attached to the outer peripheral surface with an adhesive tape. It can be installed by

[Brief description of drawings]

FIG. 1 is an external perspective view of a document holding member of an image input apparatus according to an embodiment of the present invention.

FIG. 2 is a half sectional view of the document holding member.

FIG. 3 is a developed plan view in the vicinity of a scanning opening of an outer cylindrical portion and an inner cylindrical portion.

4 is a sectional view taken along the line AA of FIG. 3 at a document scanning position (A) and a document insertion position (B).

FIG. 5 is a perspective view of a main part of a conventional drum-type image input device.

[Explanation of symbols]

 DESCRIPTION OF REFERENCE NUMERALS 1 original holding member 3 outer holding member 4 inner holding member 7 outer cylindrical portion 10 inner cylindrical portion 12 outer scanning opening 13 inner scanning opening 14 original insertion opening 18 original ejection groove 19 original ejection claw (original ejection means) 21 holding portion 22 locking means 26 gap

Claims (3)

[Claims] 1. An image input device comprising: a rotation driving unit; a document holding member connected to the rotation driving unit; and a detection unit for detecting image data of a document held by the document holding member. The document holding member includes an outer cylindrical portion concentrically provided on a rotation shaft of a rotation driving unit and an inner cylindrical portion concentrically and relatively rotatably provided inside the outer cylindrical portion. The cylindrical portion and the inner cylindrical portion are provided with an outer scanning opening portion and an inner scanning opening portion penetrating in the radial direction at the same position in the axial direction, and the scanning is performed on either one of the outer cylindrical portion or the inner cylindrical portion. A document insertion port is provided in the circumferential direction of the opening,
Locking means for locking the end of the document inserted from the document insertion opening is provided on the other end of the scanning opening in the circumferential direction of the cylindrical portion and away from the document insertion opening. The document locked by the locking means is placed between the outer cylindrical part and the inner cylindrical part by relatively rotating the cylindrical part on the side provided with the locking means to the side away from the document insertion port. An image input device characterized in that a gap for mounting is formed. 2. A document insertion port side circumferential direction of a document locked in the document locking side cylinder part by relatively rotating the document locking side cylindrical part in the document insertion port toward the document insertion port side. The image input device according to claim 1, further comprising a document take-out means for taking out an end portion from the document insertion port. 3. The image input device according to claim 1, wherein the outer cylindrical portion and the inner cylindrical portion are formed of a cylindrical body having a peripheral wall all around.