JP2001242560A - Film holder made of resin and image using the same as well as method for manufacturing film holder made of resin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a film holder which is made of a resin, is capable of surely holding an original and has high strength as well as a method for manu facturing the film holder which is made of the resin, is capable of decreasing manufacturing stages and may be integrally molded. SOLUTION: Corrugated rugged parts 13 are formed at the end on an aperture 13 side of a holding section 112 of the film holder. Corrugated rugged parts corresponding to the corrugated rugged parts 13 are formed at a metal mold for the film holder 1. The thickness of part of the leaf part of the metal mold may therefore be increased. As a result, even if the gap between the main body 10 of the film holder 1 and the holding section 112 extends in a longitudinal direction, i.e., even if the leaf part of the metal mold extends in a longitudinal direction, the strength of the leaf part of the metal mold may be improved. The manufacture of the film holder 1 by injection molding is made possible by improving the strength of the metal mold. Then, the manufacturing cost of the film holder 1 may be reduced and the durability of the film holder may be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a resin film holder, an image reading apparatus using the same, and a method for manufacturing a resin film holder.

[0002]

2. Description of the Related Art Conventionally, there has been known an image reading apparatus for placing a transparent original such as a negative film or a positive film on an original table and reading the original. When reading a transparent original, a light source is arranged above the original table, and an image reading unit is arranged below the original table, and light emitted from the light source and passing through the transparent original is detected by the image reading unit.

Since the size of the negative film and the positive film is smaller than the size of the platen of the image reading apparatus, a film holder for holding the negative film or the positive film is used at the time of reading.
As the film holder, a resin film holder is generally used in terms of cost and ease of molding.

[0004]

For example, as shown in FIG. 12, a general film holder 150 includes a main body 152 having an opening 151 through which light from a light source is transmitted, and
And a holding unit 153 for holding a document. Since the thickness of the negative film and the positive film serving as the original is about 0.2 mm, the gap formed between the main body 152 and the holding portion 153 must be set to be 0.5 mm or less. This is because it is necessary to securely hold the negative film or the positive film serving as the document and prevent the movement.

[0005] For this reason, the film holder 150 shown in FIG.
As shown in FIG. 2, the periphery of the opening 151 is bent to
A gap is formed between the holding member 153 and the holding portion 153, or a holding portion made of a separate member is formed around the opening 151 by bonding or the like.

However, when the periphery of the opening 151 is bent as shown in FIG.
In addition to the step of molding the main body 152, a step of bending the periphery of the opening 151 is required. In addition, even when the holding section made of another member is joined by bonding or the like, a step of molding the other member and a step of joining the other member to the main body are required. Therefore, there is a problem that the number of manufacturing steps increases and the manufacturing cost increases. Further, when the periphery of the opening 151 is bent, the strength of the bent portion is low, so that the portion is easily broken, and furthermore, the width of the gap changes due to continuous use, so that the film may not be held reliably. Even when the holding parts are joined by bonding, the holding parts may be easily damaged due to a decrease in the strength of the bonding parts.

On the other hand, by molding the film holder by injection molding, it is possible that the main body and the holding portion can be manufactured constantly, thereby improving the strength and reducing the manufacturing cost. However, when small gaps are continuously formed in the longitudinal direction as in the holding portion of the film holder, there is a problem that the durability of the mold is low when injection molding is used. This is because it is necessary to form a thin section corresponding to the gap in the mold in order to form the gap, and if the thin section is formed long along the opening, the strength of the thin section decreases.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a resin film holder capable of securely holding a document and having high strength and durability, and an image reading apparatus using the same. Another object of the present invention is to provide a resin film holder that allows easy insertion of a document. Another object of the present invention is to provide a method for manufacturing a resin film holder which can reduce the number of manufacturing steps and can be integrally formed.

[0009]

According to the resin film holder of the first aspect of the present invention, the main body, the rising portion and the holding portion are integrally formed. Therefore, since no bent portion or connection portion is formed, the strength and durability of the resin film holder can be improved. Further, the original can be securely held by the main body, the rising portion, and the holding portion. Further, by forming a wavy uneven portion at the end of the holding portion on the opening side, for example, when forming a resin film holder by injection molding,
A thick portion can be formed in the mold, and the strength of the mold can be improved.

According to the method for manufacturing a resin film holder of the present invention, the distance between the main body and the holding portion is 0.5 mm.
For example, a thin original such as a negative film or a positive film can be reliably held. According to the method for manufacturing a resin film holder according to claim 3 of the present invention or the resin film holder according to claim 9,
The main body and the rising portion are connected so as to be substantially vertical. Therefore, the movement of the document can be restricted, and the document can be reliably held.

According to the method for manufacturing a resin film holder according to the fourth aspect of the present invention or the resin film holder according to the tenth aspect, the holding portion is connected so as to be substantially parallel to the main body. Therefore, the movement of the document can be restricted, and the document can be reliably held.

According to the resin film holder of the present invention, the chamfered portion is formed at the corner of the wavy uneven portion on the main body side. The chamfer guides the insertion of the document when the document is inserted between the main body and the holding unit. Therefore,
The document can be easily inserted between the main body and the holding portion without being caught by the holding portion.

According to the image reading apparatus of the present invention, it is possible to mount the film holder of the present invention on a document table. Therefore, the original can be reliably localized with respect to the reading unit.

According to the method for manufacturing a resin film holder of the present invention, the main body, the rising portion and the holding portion can be formed integrally and simultaneously.
The number of manufacturing steps for manufacturing the resin film holder can be reduced. Further, since the corrugated portions are formed at the end of the holding portion on the opening side, the thickness of the mold at a portion corresponding to the corrugated portions can be increased. Therefore, the durability of the mold can be improved.

According to the method for manufacturing a resin film holder of the present invention, the chamfered portion is formed at the corner of the corrugated uneven portion on the main body side, so that the die is also provided with a corresponding chamfered portion. be able to. Therefore, stress concentrated on the corners of the mold can be prevented, and damage to the mold can be prevented. Therefore, the durability of the mold can be improved.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a plurality of embodiments of the present invention will be described with reference to the drawings. (First Embodiment) FIG. 1 shows a resin film holder (hereinafter, a resin film holder is simply referred to as a "film holder") according to a first embodiment of the present invention.

The film holder 1 holds a positive or negative film as a transparent original. The film holder 1 mainly includes a main body 10, a holding portion 11 and a handle portion 12, and the main body 10, the holding portion 11 and the handle portion 12 are integrally formed without a seam. The main body 10 has an opening 13 at the center. In this embodiment, the opening is formed so that the length in the vertical direction in FIG. 1 is approximately 6 cm so as to fit the Brownie film.

The holding portion 11 has a rising portion 111 that rises substantially vertically from the main body 10 and a holding portion 112 connected to an end of the rising portion 111 on the side opposite to the main body so as to be substantially parallel to the main body. are doing. That is, the holding section 112 and the rising section 111 are connected so as to be substantially vertical. The holding portion 11 includes an opening 13
Are formed along a pair of long sides 13a facing each other.

At the end of the holding portion 112 on the opening side, a wavy uneven portion 113 is formed. The wavy irregularities 113,
It is formed along the long side 13a and is formed so as to meander vertically to the long side 13a.

As shown in FIG. 1, the corrugated uneven portion 113 is not formed in a corrugated shape composed entirely of curves, but is formed by a combination of a curved portion and a straight portion. As shown in FIG. 2, the tangent line L of the curved portion is set so that the angle θ formed with respect to the axis P perpendicular to the long side portion 13a is 45 ° or less.

As shown in FIG. 3, the distance D between the surface 10a on the holding portion side of the main body 10 and the surface 112a on the main body side of the holding portion 112 is formed to be 0.5 mm or less. That is, the width of the gap 14 formed between the main body 10 and the holding portion 112 becomes 0.5 mm or less. for that reason,
As shown in FIG. 1, the transparent original 2 is sandwiched in the gap 14 between the main body 10 and the holding unit 112. For the sake of simplicity, the scale of each member shown in the drawing is partially different depending on the part and is enlarged or reduced.

A chamfered portion 113a is formed at a corner of the corrugated uneven portion 113 on the side of the main body 10. Chamfer part 1
13a is formed to meander along the main body 10 side of the wavy uneven portion 113 in the long side portion 13a direction. The radius of the chamfered portion 113a is formed to be about 0.5 mm.

Next, a method of manufacturing the film holder 1 will be described. In the film holder 1, the main body 10, the holding portion 11 including the rising portion 111 and the holding portion 112, and the handle portion 12 are integrally formed by injection molding. By molding the film holder 1 by injection molding, the main body 10 and the holding portion 11 and the handle portion 12 connected to the main body 10 are formed in one process. Injection molding is performed by a known process.

As shown in FIGS. 4 and 5, a mold 20 used for manufacturing the space 14 of the film holder 1 has a thick portion 21 and a protruding portion 22 protruding from the thick portion 21. ing. The protruding portion 22 has a substantially rectangular parallelepiped thin piece portion 221 formed integrally with the thick portion 21. Thin section 22
The length of one first side 221a is equal to the length of the other second side 221b.
And it is longer than the third side 221c. From the thick portion 21, a wavy convex / concave portion 211 protrudes from the thin portion 221. The wavy convex / concave portions 211 are formed integrally with the thin portion 221 and the thick portion 21 on one surface side of the thin portion 221.

When the corrugated concave and convex portions 211 are formed in the thin section 221, the third section of the projecting section 22 including the thin section 221 of the mold 20 is formed.
The length in the side portion 221c direction increases. Thereby, the strength of the protruding portion 22 of the mold 20 is improved.

Further, a chamfered portion 21a corresponding to the chamfered portion 113a of the film holder 1 is formed at a corner of a connecting portion between the thick portion 21 and the thin portion 221. That is,
Wavy convex and concave portions 211 protruding from the thick portion 21 and the thin portion 22
1 and a portion where the thick portion 21 and the thin portion are connected are formed with a chamfered portion 21a. This chamfer has a radius R of about 0.5 mm so as to correspond to the chamfered portion 113a. In addition, the broken line part of FIG. 4 has shown the chamfer part 21a.

The thin section 221 of the mold 20 corresponds to the shape of the gap 14 of the film holder 1, and the wavy dents and depressions 211 correspond to the undulating unevenness 113 of the holding section 112. The thick portion 21 corresponds to the shape of the opening 13 of the film holder 1. Therefore, the mold 20 and the film holder 1 have a relationship as shown in FIG. The film holder 1 is formed by injecting a molten resin into the space S formed by the mold 20, the mold 30, the mold 31, the mold 32, the mold 34, and the mold 35.

Next, the image reading device 4 on which the above-mentioned film holder 1 can be mounted will be described in detail. As shown in FIG. 7, the image reading device 4 includes a carriage 50 as an image reading unit inside a box-shaped casing 40. A document table 41 made of a transparent plate such as glass is provided above the housing 40. Inside the housing 40, a carriage 50 is provided that can reciprocate in a sub-scanning direction parallel to the document table 41 by the driving device 42.

The carriage 50 has a light source 5 for reflecting originals.
One, a plurality of mirrors 52 and 53, a condenser lens 54 and a line sensor 55 are mounted. Mirror 52,53
Is provided to reflect the light from the document condensed on the line sensor 55 and increase the optical path length. The condenser lens 54 condenses the light and makes the light incident on the line sensor 55.
As the line sensor 55, a charge accumulation type optical sensor in which a plurality of pixels such as CCDs are linearly arranged perpendicular to the moving direction of the carriage 50 is used.

The light source 51 for the reflection original is a carriage 50
And a fluorescent lamp or the like is used. Light emitted from the light source 51 is reflected on the surface of a reflective original such as paper, for example, and is incident on the line sensor 55.

As shown in FIG. 7 and FIG.
A light source unit 60 for a transparent original is arranged at the upper part of FIG. The light source unit 60 includes a surface light source 61 and a mounting section 62. The light source unit 60 for the transparent original is a surface light source 61 for irradiating the transparent original 2 with uniform light. The surface light source 61 is provided above the document table 41, and transmits light emitted from the fluorescent lamp 611 as shown in FIG.
By reflecting at unevenly spaced grooves engraved in 2,
The surface light source 61 irradiates the original table as uniform light.

A document guide 70 is provided around the document table 41 for positioning the position of the document to be read and restricting the movement of the document when reading the document. Platen 41
A white reference 71 having a high-reflectance uniform reflection surface is provided at the end in the carriage movement direction. This platen 41
The film holder 1 as shown in FIG.

As shown in FIG. 7 and FIG.
The mounting portion 62 of the light source unit 60 is mounted on a portion surrounded by the document guide 70. Document Guide 7
The inner peripheral portion 70a of the light source unit 60 corresponds to the outer peripheral portion 62a of the mounting portion 62 of the light source unit 60. By mounting the mounting portion 62 along the inner peripheral portion 70a of the document guide 70, the light source unit 60 Is located above the document table 41.

An opening 621 is further formed at the center of the mounting portion 62, and the film holder 1 is detachably fitted into the opening 621. Since the outer shape of the film holder 1 and the shape of the opening 621 are substantially the same, the film holder 1 is positioned with respect to the mounting portion 62 and the document table 41 by fitting the film holder 1 into the opening 621.

As shown in FIG. 7, a processing section 80 is mounted inside the housing 40. The processing unit 80 includes a CPU (Ce
ntral Processing Unit) 81, RAM (Random Access)
Memory 82, ROM (Read Only Memory) 83, and data creation unit 84. CPU8
1 controls the entire operation of the image reading device 4 such as controlling the driving of the carriage 50, controlling the blinking of the light source 51 and the surface light source 61, and processing the image data created by the data creating unit 84. The RAM 82 temporarily stores image data and the like read by the line sensor 55. ROM
A computer program for controlling each unit of the image reading device 4 by the CPU 81 is stored in 83.

The data creating section 84 includes an A / D converter (not shown), a shading correcting section, a gamma correcting section, and other correcting sections. The A / D converter is
The analog electric signal output from the line sensor 55 is converted into a digital electric signal. The shading correction unit uses the data obtained by reading the white reference before the reading of the digital signal output from the A / D converter, and uses the data obtained by reading the white reference to vary the sensitivity of each element of the line sensor 55 or the light source 51. In addition, the variation of the light amount of the surface light source 61 in the main scanning direction is corrected. The gamma correction unit performs gamma correction using a predetermined gamma function, and converts a digital light amount signal subjected to shading correction into digital image data. Other correction units perform various conversions such as color correction, edge enhancement, and area enlargement / reduction.

The digital image data created by the data creation section 84 is output from an interface 43 provided in the housing 40 to an image processing apparatus such as a personal computer 5 connected to the outside.

Next, the operation of the image reading device 4 will be described. Here, reading of the transparent original 2 will be described. The user mounts the transparent original 2 desired to be read on the film holder 1 and fits the film holder 1 into the opening 621 of the light source unit 60 placed on the original table 41. Then, it instructs the image reading device 4 to start reading the transparent original 2 via an application program for controlling the image reading device 4 such as, for example, TWAIN, which is activated on the personal computer 5.

When a user instructs to start reading a document, the CPU 81 turns on the surface light source 61. And
The CPU 81 controls the drive unit 42 to move the carriage 50 at a constant speed in the sub-scanning direction. Light that has passed through the transmission original 2 is incident on the line sensor 55, and the incident light is converted into electric charges and accumulated. The accumulated charges are transferred to a shift register (not shown) of the line sensor 55 by a drive signal generated every predetermined time, and
The electric signals for the lines are sequentially output to the data creation unit 84. The digital image data corrected by the data generator 84 is output to the personal computer 5 via the interface 43. The transparent document 2 is read by repeating the above process while moving the carriage 50 in the sub-scanning direction at a constant speed.

As described above, according to the film holder 1 of this embodiment and the method of manufacturing the same, the holding portion 112 of the film holder 1 is formed with the corrugated uneven portion 113 at the end on the opening 13 side. By forming the wavy irregularities 211 also in the mold 20 of the film holder 1 to be formed,
Part of the thickness of the thin section 221 of the mold 20 can be increased. Therefore, even when the gap 14 between the main body 10 of the film holder 1 and the holding portion 112 extends in the longitudinal direction, that is, when the thin section 221 of the mold 20 extends in the direction of the first side 221a, the metal The strength of the thin section 221 of the mold 20 can be improved.

Further, the wavy irregularities 11 of the film holder 1
When a negative film or a positive film, which is the transparent original 2, is inserted into the gap portion 14 by forming the chamfered portion 113a in
And can be easily inserted without being caught in the corners. Further, by forming the chamfered portion 21a corresponding to the chamfered portion 113a along the connecting portion between the thick portion 21 and the thin piece portion 221 of the mold 20, stress concentration on the corner of the mold 20 can be prevented, The durability of the mold 20 can be improved.

Therefore, it is not necessary to join another member to the film holder 1 or to form a bent portion in order to sandwich the transparent original 2, so that the number of manufacturing steps is reduced. Therefore, the manufacturing cost of the film holder 1 can be reduced, and the durability of the film holder 1 can be improved.

(Second Embodiment) FIG. 10 shows a film holder according to a second embodiment of the present invention. Components substantially the same as those in the first embodiment are denoted by the same reference numerals. As shown in FIG. 10, a film holder 90 according to the second embodiment of the present invention is shown.
Has the same outer shape as the first embodiment, but the area of the opening 91 is different from that of the first embodiment. The second embodiment differs from the first embodiment in that the opening 91 is formed almost entirely over the main body 10. The holding portion 92 is formed along opposing sides 91 a in the longitudinal direction of the opening 91. The shape of the holding portion 92 is the same as in the first embodiment.

(Third Embodiment) FIG. 11 shows a film holder according to a third embodiment of the present invention. The same components as those in the first embodiment are denoted by the same reference numerals. As shown in FIG. 11, the film holder 100 according to the third embodiment of the present invention differs from the first embodiment in that openings 101 are formed at two places. The outer shape of the film holder 100 is the same as that of the first embodiment. The film holder 100 can hold a 35 mm camera film. The holding portion 102
Side portions 101 facing the longitudinal direction of two openings 101
Each is formed along a. The shape of the holding portion 102 is the same as in the first embodiment.

[Brief description of the drawings]

1A and 1B are schematic views showing a film holder according to a first embodiment of the present invention, wherein FIG. 1A is a plan view, and FIG. 1B is a cross-sectional view taken along line BB of FIG.

FIG. 2 is an enlarged view of a portion II in FIG.

FIG. 3 is an enlarged view of a portion III in FIG. 1;

FIG. 4 is a schematic perspective view showing a mold of the film holder according to the first embodiment of the present invention.

FIG. 5A is an arrow view of FIG. 4 viewed from a direction V,
(B) is a sectional view taken along line BB in (A).

FIG. 6 is a cross-sectional view illustrating a mold of the film holder according to the first embodiment of the present invention, and is a schematic diagram illustrating a configuration of the film holder and the mold.

FIG. 7 is a block diagram showing an image reading apparatus according to the first embodiment of the present invention, showing a state where a personal computer is connected.

FIG. 8 is a schematic diagram illustrating a surface light source of the image reading apparatus according to the first embodiment of the present invention.

FIG. 9 is a schematic diagram illustrating the image reading apparatus according to the first embodiment of the present invention, and is a diagram illustrating an arrangement of a document guide, a mounting portion of a light source unit, and a film holder.

FIG. 10 is a schematic plan view illustrating a film holder according to a second embodiment of the present invention.

11A and 11B are views showing a film holder according to a third embodiment of the present invention, wherein FIG. 11A is a plan view and FIG. 11B is a view B of FIG.
It is sectional drawing cut | disconnected by the -B line.

FIG. 12 is a schematic perspective view showing a conventional film holder.

[Explanation of symbols]

 1, 90, 100 Film holder 2 Transparent original 4 Image reading device 10 Main body 13, 91, 101 Opening 41 Document table 50 Carriage (image reading unit) 51 Light source 60 Light source unit 92, 102 Holding unit (rise unit, holding unit) 111 rising part 112 holding part 113 wavy uneven part

Claims (11)

[Claims] A main body having a rectangular opening; a rising portion connected to the main body seamlessly and integrally along a pair of opposing sides of the opening; and a seamlessly integral with the rising portion. A resin film holder, comprising: a holding portion connected to the holding portion; and a wavy uneven portion formed in the side portion direction at an end of the holding portion on the opening side. 2. A distance between a surface of the main body on the side of the holding portion and a surface of the main body of the holding portion on the side of the main body is 0.5 mm or less. Resin film holder. 3. The resin film holder according to claim 1, wherein the rising portion is formed so as to be substantially perpendicular to the main body. 4. The apparatus according to claim 1, wherein said holding portion is formed so as to be substantially parallel to said main body.
4. The resin film holder according to any one of the above items 3. 5. The resin-made film holder according to claim 1, wherein a chamfered portion is formed at a corner of the wavy uneven portion on the main body side. 6. A document table on which the resin film holder according to claim 1 can be mounted, a light source for irradiating a document mounted on the resin film holder, and reflection on the document. An image reading device, comprising: a reading unit that can read light from the light source transmitted through the document. 7. A body having a rectangular opening, a rising portion connected along a pair of opposing sides of the opening, a holding portion connected to the rising portion, and the holding portion. A method of manufacturing a resin film holder, comprising: a wavy uneven portion formed in the side direction at an end of the opening on the side of the opening, wherein the main body, the rising portion, and the holding portion are formed by injection molding. A method for manufacturing a resin film holder, comprising a step of integrally molding. 8. The apparatus according to claim 7, wherein a distance from a surface of the main body on the holding portion side to a surface of the holding portion on the main body side is 0.5 mm or less. Of manufacturing a resin film holder. 9. The method according to claim 7, wherein the rising portion is formed to be substantially perpendicular to the main body. 10. The apparatus according to claim 7, wherein the holding portion is formed so as to be substantially parallel to the main body.
10. The resin film holder according to any one of items 8 and 9. 11. The resin-made film holder according to claim 7, wherein a chamfered portion is formed at a corner of the wavy uneven portion on the main body side.