JPH0965066A - Image input device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve workability for mounting an original by simply and easily mounting the original onto the image input device of a color scanner. SOLUTION: An original holder supporting member 2 linked to a rotary driving part 1 has a first supporting member 3 fitted to a rotary shaft 1A of the rotary driving part 1 and a second supporting member 4 provided at this first supporting member 3 so as to be freely turned around the rotary core. The first and second supporting members 3 and 4 are provided with supporting arms 9 and 21 extended parallelly with the rotary cores and at the terminal parts of the respective supporting arms 9 and 21 in rotating directions, supporting means 15A and 22A for supporting the side edge parts of an original holder 5 are formed at the positions in the equal distance from the rotary cores. Besides, a fixing means 25 is provided for positioning and fixing the second supporting member 4 corresponding to the first supporting member 3.

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. 9, 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 according to the present invention comprises a rotary drive unit, a document holder holding member connected to the rotary drive unit, a document holder held by the document holder holding member, and A detection unit that detects image data of a document mounted on the document holder, wherein the document holder holding member is attached to a rotation shaft of a rotation drive unit.
A holding member and a second holding member rotatably provided on the first holding member about a rotation axis, and each of the first holding member and the second holding member is parallel to the rotation axis. Holding means extending in the direction of the rotation axis, and holding means for holding the side edge portion of the original document holder at a position equidistant from the axis of rotation are formed at the ends of the respective holding arms in the rotation direction. Fixing means for positioning and fixing the second holding member with respect to the first holding member is provided.

According to the image input apparatus of the present invention, the side edges of the document holder are moved to each other by relatively rotating the holding arms of the first holding member and the second holding member so that the holding arms come close to each other. The holding arm is sandwiched by both holding arms while being held by the holding means formed at the end of the holding arm in the rotation direction. In this state, the original holder is mounted and held by the original holder holding member by fixing the relative rotation of both holding members by the fixing means. Therefore, it is not necessary to attach / detach the document holder holding member to / from the rotation drive unit, and the document holder can be easily and easily attached to the document holder holding member and thus to the image input device. Further, the document holder holding member is sufficient as long as it can hold the document holder, so that the size can be made smaller than that of the conventional rotary drum, and the manufacturing cost can be reduced and the device can be downsized. You can Furthermore, since the document holder is small and lightweight as long as the document can be mounted, the document can be easily mounted on the document holder without using a special mounting jig. Also, it does not take up any space for storage.

In the image input apparatus, the first holding arm and the second holding arm are provided so as to be able to advance and retreat in the radial direction with respect to the rotation axis, so that document holders of various sizes can be used.

Since the first and second holding members can be formed to be relatively small and lightweight as compared with the conventional drum main body, the holding arm pulling caused by the rotation of the holding member and the surface runout of the document holder do not occur. Although slight, by providing each holding member with a balancer for canceling the centrifugal force of each holding arm, it is possible to further suppress the surface wobbling of the holding arm during image data scanning, which enables highly accurate detection. It will be possible.

By the drive of the rotary drive unit, the first holding member connected to the rotary shaft of the rotary drive unit and the second holding member fixed thereto rotate about the rotary shaft center and are held by both the holding arms. The document holder also rotates around the axis of rotation,
The document mounted on the document holder is scanned, and the image data is detected by the detection means.

At this time, from the viewpoint of ensuring the detection accuracy, it is necessary that the distance between the document and the scanning head is equal, and that the distance from the axis of rotation to each part of the document is equal.
For this reason, the document holder usually has a partial cylindrical shape in which a cross section in a plane perpendicular to the rotation axis is an arc shape having the same radius. However, if each part of the original document exists within the permissible range of the focal depth of the reading lens provided in the scanning head, there is no problem in detecting the image data. The document mounting surface of the document holder may be flat as long as the document scanning unit is present between the cylindrical surfaces.

[0015]

1 and 2 show an example of an embodiment of an image input apparatus according to the present invention, in which a rotary drive unit 1 and a first holding member 3 connected to a rotary shaft 1A thereof are provided. A second rotary member provided so as to be rotatable relative to the first holding member 3.
A document holder holding member 2 including a holding member 4, and a partially cylindrical document holder 5 whose both edges in the rotation direction are held by the first holding member 3 and the second holding member 4 are provided. In addition to the above-mentioned members, this image input device is provided with a detecting means for scanning and detecting the image data of the original mounted on the original holder 5 as in the conventional case, but the configuration is the same as the conventional one. Omit it.

The first holding member 3 has a base plate portion 7 for attaching to the rotary shaft 1A, a support arm 8 extending radially outward from the peripheral surface of the base plate portion 7, and a rotary shaft formed by its end portion. A holding arm 9 extending in the axial direction is provided. The substrate portion 7 has a boss portion 10 for connecting to the rotation shaft 1A.
Are formed, and the both are connected by an appropriate fixing means such as a screw 11. In the present embodiment, the example in which the substrate portion 7 is fixed to the rotating shaft 1A by the fixing means is shown, but as in the conventional case, a detachable attaching means such as a bayonet mount may be applied. However, in the present invention, since it is not necessary to attach and detach the first holding member 3 to and from the rotary drive unit 1 one by one, the fixing means as shown in the figure is sufficient.

The holding arm 9 has a holder holding portion 14 formed from a rising portion 13 on the supporting arm 8 side, and the side edges of the document holder 5 are fitted and held at both ends in the rotation direction of the holder holding portion 14. Holding grooves 15A and 15B serving as holding means are formed parallel to the rotation axis and at the same distance from the rotation axis.

A shaft portion 17 is projectingly provided on the shaft center portion of the substrate portion 7, and a second bearing is provided on the shaft portion 17 via a bearing 18.
The base plate portion 19 of the holding member 4 is provided rotatably around the rotation axis, and the support arm 2 is provided radially outward of the base plate portion 19.
0 extends, and a holding arm 21 extends from the end of the support arm 20 in parallel with the rotation axis. Holding grooves 22A and 22B for fitting and holding the side edges of the document holder 5 are formed at both ends of the holding arm 21 in the rotation direction, the holding grooves 22A and 22B being parallel to the rotation axis. 1 is formed at the same radial position as the holding grooves 15A and 15B of the holding member 3, and has a length equal to or larger than the maximum length of the document holder 5 to be used.

An arcuate slot 24 centered on the axis of rotation is formed in the base plate portion 19 of the second holding member 4, while the base plate portion 7 of the first holding member 3 has the long hole. Hole 2
A screw hole is provided at the same radial position as 4. The long hole 2
By inserting a fixing screw 25 as a fixing means into 4 and screwing the screw portion into the screw hole of the base plate portion 7, the second holding member 4 causes the base plate portion 7 of the first holding member 3 and the head of the fixing screw 25. The second holding member 4 is positioned and fixed to the first holding member 3 by being sandwiched by the lower surface of the part.

The elongated hole 24 is arranged so that the holding arm 21 of the second holding member 4 can be rotated about 180 ° about the rotation axis from the position where the holding arm 21 of the second holding member 4 is closest to the holding arm 9 of the first holding member 3. The opening range of the long hole 24 may be set. Further, a slot is provided on the side of the substrate portion 7 of the first holding member 3, while a screw hole is provided on the side of the substrate portion 19 of the second holding member 4, and a fixing screw is provided from the side of the rotary drive unit 1 to the slot of the substrate portion 7. Through the screw hole provided in the base plate portion 19 of the second holding member 4,
The holding member 4 may be positioned and fixed to the first holding member 3.

The document holder 5 has a thickness such that its side edge portion fits into the holding grooves 15A, 15B, 22A, 22B, and a cross section in a plane perpendicular to the rotation axis is centered on the rotation axis. It is formed in an arc shape. An opening 26 smaller than the original size and larger than the scanning area is provided in the center. The document is attached by an adhesive tape or the like so that the peripheral edge thereof is located at the outer peripheral edge of the opening 26. The opening 26 is for allowing the document to be directly scanned and for preventing the occurrence of Newton's rings.

According to the above embodiment, the document holder 5 can be easily held on the document holder holding member 2 in the following manner. First, in a state in which the second holding member 4 is sufficiently separated from the first holding member 3, the document holder 5 on which a document is mounted is fitted into the holding groove 15A formed in the holding arm 9 of the first holding member 3. Hold together. As for the way of holding, the tip end in the axial direction may be inserted along the groove, or the side edge of the document holder 5 may be inserted into the holding groove 15A from the tangential direction. Then, the second holding member 4 is rotated to the first holding member 3 side, the holding groove 22A formed in the holding arm 21 of the second holding member 4 is fitted into the other side edge portion of the document holder 5, and the fixing screw is attached. 25 is fastened and the second holding member 4 is fixed to the first holding member 3. As shown in the figure, the holding arms 9 and 2
When holding grooves are formed at both ends in the direction of rotation of 1, one of the holding grooves 15B and 22B can be used to mount another document holder. After that, the image data of the document held in the document holder 5 is detected in the same manner as in the conventional case.

When the fixing position of the second holding member 4 corresponding to the original holder 5 to be used with respect to the first holding member 3 is known, the second holding member 4 is previously positioned and fixed to the first holding member 3. , Holding groove 15 of holding arms 9, 21
The document holder 5 is attached to the substrate portions 7 and 1 from the tip portions of A and 22A.
It may be plugged into the 9 side. In this case, the rotational position of the second holding member 4 with respect to the first holding member 3 can be read,
Appropriate scales may be formed on the outer peripheral surface of the substrate portion 19 of the second holding member 4.

The present invention is not limited to the above-mentioned embodiment, and for example, the original holder 5 may have a transparent plate shape without an opening. In this case, fine powder or oil is usually interposed between the document and the document holder to prevent the generation of Newton's rings. Further, as another document holder 5A, as shown in FIG.
A and 26B may be formed, and two upper and lower partial cylindrical members 27A and 27B having a hinge structure at one side edge may be provided. In this case, the original is a cylindrical member 27 on both sides.
It is held by being sandwiched between A and 27B.

Further, the holding grooves 15A, 15B, 22
The shapes of A and 22B are not limited to the rectangular shape in the illustrated example, but may be V-shaped in cross section as shown in FIG. 4, and the shape is arbitrary.
Further, the holding groove may be formed only by a pair (for example, 15A and 22A) facing each other by the rotation of the second holding member 4.

The holding means for the document holder 5 is not limited to the holding groove, but a stepped portion 30 formed in parallel with the axis of rotation is formed on the holding arm 21A as shown in FIG. Alternatively, the side edge of the document holder 5 may be arranged on the step portion 30, and an appropriate portion of the side edge of the document holder 5 may be fixed by a clip 31 formed of a leaf spring or the like. Of course, as a method of fixing the document holder 5, a screw member 33 having a pressing collar 32 as shown in FIG. 6 may be used instead of the clip 31. In these examples, the step portion 30 and the clip 31 or the step portion 30 and the screw member 33 constitute a holding means.

Further, as shown in FIG. 7, by providing the holding arms 9 and 21 so as to be capable of advancing and retracting in the radial direction with respect to the rotation axis, it is possible to use document holders having various radii of curvature. Although FIG. 7 shows the second holding member 4, the same advancing and retracting means can be applied to the first holding member 3. In the illustrated example, a slide base 36 extending radially outward is provided on the base plate portion 19, and a slide groove 37 that engages with the upper surface and the inclined side surface of the slide base 36 is formed on the support arm 20A. The support arm 20A slides back and forth on the slide base 36, and at appropriate positions, setscrews 39 penetrating the upper wall portion of the support arm 20A are provided on the upper surface of the slide base 36 at appropriate intervals. It is positioned and fixed by screwing into 38. Of course, the support arm 20A may be provided with an elongate hole in the radial direction so that the positioning can be performed continuously.

Furthermore, the first and second holding members 3, 4 are
By providing a balancer for canceling the centrifugal force of each holding arm 9 and 21, it is possible to suppress the surface wobbling of the holding arm during image data scanning, and it is possible to perform highly accurate detection. In this case, the first and second holding members can be manufactured symmetrically with respect to the rotation axis, and one holding arm of each member can be used as the other holding arm.

Further, the holding member constituting the document holder holding member 2 is not limited to the two members as in the above-mentioned embodiment, and three or more members may be provided if necessary. For example, an example of the document holder holding member 2A having the third holding member is shown in FIG. In this example, the first holding member 3
The shaft portion 17A provided on the base plate portion 7 of the second holding member 4 is formed to be long so as to pass through the center hole of the base plate portion 19 of the second holding member 4, and the tubular member 40 inserted and attached to the shaft portion 17 is formed. The base plate portion 42 of the third holding member 41 is rotatably attached to the front end portion of the via a bearing 43. Then, the fixing screw 44 is inserted into the screw hole provided in the base plate portion 19 of the second holding member 4 through the elongated hole formed in the base plate portion 42 through the tubular body 45, so that the third holding member 41 becomes The second holding member 4 is positioned and fixed. Of course, similarly to the first holding member 3 and the like, the third holding member 41 also has the holding arm 47 formed in parallel to the rotation axis center via the support arm 46.

[0030]

According to the image input apparatus of the present invention, the document holder is directly held by the holding arms provided on each of the first holding member and the second holding member which constitute the document holder holding member. It is not necessary to attach and detach the holding member to and from the rotary drive unit, and the document holder can be easily and easily attached to the document holder holding member and thus to the image input device, which is excellent in workability. Further, since the first holding arm and the second holding arm are provided so as to be able to advance and retreat in the radial direction with respect to the rotation axis, the document of the optimum size according to the size of the document can be obtained without replacing the document holder holding member. A holder can be used. Furthermore, by providing each holding member with a balancer for canceling the centrifugal force of each holding arm, it is possible to suppress surface wobbling of the holding arm during image data scanning, and it is possible to perform highly accurate detection.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a main part of an image input device according to an embodiment of the present invention.

FIG. 2 is an explanatory cross-sectional view of a document holder holding member connected to a rotation driving unit in the image input apparatus.

FIG. 3 is a perspective view showing another example of a document holder.

FIG. 4 is a perspective view of a main part showing another example of the holding groove provided in the holding arm.

FIG. 5 is a perspective view of an essential part showing another example of the holding means provided on the holding arm.

FIG. 6 is a cross-sectional view of main parts showing another example of the holding means provided on the holding arm.

FIG. 7 is a perspective view showing a structure of a second holding member in which a holding arm is movable in a radial direction with respect to a rotation axis.

FIG. 8 is an explanatory cross-sectional view of a document holder holding member having a third holding member.

FIG. 9 is a perspective view of a main part of a conventional drum-type image input device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 rotation drive part 2, 2A original document holder holding member 3 1st holding member 4 2nd holding member 5, 5A original document holder 9, 21, 21A holding arm 15A, 15B, 22A, 22B holding groove (holding means) 25 fixing screw ( Fixing means) 30 step portion 31 clip (holding means in cooperation with 30) 33 screw member (holding means in cooperation with 30)

Claims (3)

[Claims] 1. A rotary drive unit, a document holder holding member connected to the rotary drive unit, a document holder held by the document holder holding member, and image data of a document mounted on the document holder is detected. And a first holding member attached to the rotation shaft of the rotation drive unit, and the first holding member is rotatable around the rotation axis center. A second holding member provided on the first holding member and a second holding member, each of the first holding member and the second holding member being provided with a holding arm extending parallel to a rotation axis, and an end of each holding arm in a rotation direction. A holding means for holding the side edge portion of the document holder is formed at a position equidistant from the rotation axis, and a fixing means for positioning and fixing the second holding member with respect to the first holding member is provided in the portion. Image characterized by Input device. 2. The image according to claim 1 or 2, wherein holding arms provided on each of the first holding member and the second holding member are provided so as to be capable of advancing and retracting in a radial direction with respect to a rotation axis. Input device. 3. The image input according to claim 1, wherein the first holding member and the second holding member are provided with balancers for canceling centrifugal force acting on the holding arm against rotation about the rotation axis. apparatus.