JPH09163094A - Planer projection type scanning reader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and surely mount a freely slidable shelf-shaped member by providing the working member for temporarily supporting a shelf member for sliding which freely slidably placing the side end part of a scanning part on the internal surface of a device body side plate part. SOLUTION: By the side plate part of a sheet metal chassis 3, a butting member 3h is projectingly provided in the internal direction by a bending working. Further, a screw hole 3i and a hole 3j for positioning are punched on the side plate part. A slidable shelf 18 is formed in the shape of a letter L in the front view. On the vertical surface part of the shelf, a screw hole 18a is punched and a projection 18b for positioning is projected outward. When the lower end part of the slidable shelf 18 is temporarily placed on the butting member 3h and the vertical surface part is applied to the side plate part of the chassis 3, the screw hole 18a is roughly matched with the screw hole 3i. When a screw 20 is screwed into these screw holes, the slidable shelf 18 is pressed on the side plate part of the chassis 3 and the projection 18b for positioning is naturally fitted into the hole 3j for positioning of the chassis 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat-plate type scanning reading device (flatbed scanner) for scanning and reading a document placed on a horizontal projection glass in a stationary state.
However, it can be applied as a read-only machine such as a facsimile, a personal computer, or a CAD.

[0002]

2. Description of the Related Art In a conventional facsimile, an operation reading is performed by conveying a document in a fixed direction. That is, the optical system in the apparatus is fixed, and the original is operated. In this case, due to the structure of the document conveying system, the document is limited to have a certain thickness or less. Therefore, conventionally, a thick manuscript such as the contents of a book, a catalog, a license, etc. is once copied, and the copy is used as the manuscript.

[0003]

Therefore, as in a general copying machine, there is provided a read-only machine in which even a thick original is placed on a glass surface for projection and the optical system scans and reads it. It is conceivable to use it by connecting it to a facsimile machine. It is also convenient for a personal computer and CAD to have such a reading device.

In a reading apparatus of this type, an original is illuminated by a light source, the illuminated portion is reflected by a mirror, and the image is finally projected on a lens and a CCD to produce an electronic signal. In order to read the entire original, the scanning body equipped with the light source and the mirror is reciprocally moved and scanned. This scanning body must be moved while maintaining a constant posture. For this reason, a method of slidably inserting a guide shaft erected in the sliding direction into the side end of the scanning body can be considered. However, if such guide shafts are arranged on both sides of the apparatus, the width of the apparatus in the left-right direction becomes large, and it is apt to take up space as a read-only apparatus such as a facsimile. In addition, such a guide shaft requires high precision polishing, which results in high cost. Therefore, a method in which one side end of the scanning body is slidably mounted on a shelf-shaped member can be considered. In order to attach such a shelf-like member to the side plate surface in the apparatus main body, there are restrictions such as positioning with respect to the scanning body, and a method of attaching while easily and surely is required.

[0005]

The present invention uses the following means in order to solve the above problems. First of all, the document to be read is placed on the projection flat plate provided on the upper surface of the device, and the scanning unit including the light source for illuminating the document and the mirror for image projection is reciprocally slid and scanned in the device. In the flat-plate projection type scanning reading apparatus for performing reading by performing the reading, a contact member for temporarily supporting the sliding shelf member on which the side end of the scanning unit is slidably mounted is provided in the apparatus main body side plate section. A flat-plate projection type scanning reading device provided on the side surface is configured.

Secondly, in the flat-plate projection type scanning / reading device, the side plate portion is made of sheet metal, and the corresponding member is formed by bending.

Thirdly, in the flat-plate projection type scanning reading apparatus, when the sliding shelf member is supported by the corresponding member,
Naturally, the screw holes of the sliding shelf member and the side plate portion are aligned,
Further, when a screw is screwed into the screw hole, the positioning protrusion of the sliding shelf member naturally fits into the positioning hole of the side plate portion.

[0008]

Embodiments of the present invention will be described with reference to the drawings. 1 is a partial perspective view showing a mounting structure of a sliding shelf 18 on a side plate portion of a chassis 3, FIG. 2 is a partial front sectional view of the same, and FIG. 3 is a part showing a fitting structure of a positioning protrusion 18b and a positioning hole 3j. Front sectional view, FIG. 4 is a plan view of a flat-plate projection type scanning reader (flatbed scanner),
5 is a cross-sectional view taken along line XX in FIG. 4, FIG. 6 is a plan view of the chassis 3 in a state where the optical system scanning unit is near the scanning start end position, and FIG.
FIG. 8 is a plan view of the chassis 3 in a state in which the optical system scanning unit is near the scanning end position, FIG.
It is a perspective view which shows the shape of 0, and an attachment method.

The plane projection type scanning reading device according to the present invention, that is, the structure of the exterior portion of the flatbed scanner will be described. The outer cover 1 is formed by bending a sheet metal, and a horizontal surface portion serving as a bottom portion is bent in an upward vertical shape to form a side surface portion. Both ends of the adjacent side surface portions are connected to each other by a corner member 2 which is bent by resin processing into an L-shape in a plan view as shown in FIG. 5 or 8. The corner member 2 serves as a protective cover for the four corners of the exterior cover 1, and also projects a little below the bottom surface of the exterior cover 1 to have a function as a leg material of the flatbed scanner. In addition, since the exterior cover itself can form a corner with a safe protective structure by mounting the corner member 2, only bending of the sheet metal is required, and complicated processing such as using a deep drawing die is required. Since it is not necessary, it contributes to cost reduction.

A chassis 3, which is an inner cover, is arranged in the outer cover 1 as shown in FIG. 5. At the upper ends of the outer cover 1 and the chassis 3, a platen cover 4 made of resin is horizontally provided. It is arranged. A horizontal plane-shaped projection glass 5 on which the original G is placed is fitted in the original table cover 4, and an upper end portion thereof is fixed to the original table cover 4 in the left-right direction and rotated vertically. A movable document holding cover 6 made of resin is provided. On the lower surface of the document pressing cover 6, a sponge 6a for buffering is directly attached so as to directly contact the document G on the projection glass 5. The plan view appearance of the upper surfaces of these devices is as shown in FIG. Various operation panels and display panels are formed on a portion 4a of the original document cover 4 which is not covered by the original pressing cover 6.

Next, the internal structure will be described with reference to FIGS. Inside the outer cover 1, as described above,
A chassis 3 as shown in FIGS. 6 and 7 in plan view is arranged. Notches A and B are formed in the bottom surface of the chassis 3, and the bottom surface of the outer cover 1 is exposed through the notches A and B. In the notches A, the outer cover is formed. A power source 7 is fixed to the bottom surface of the outer cover 1 and a main substrate 8 is fixed to the bottom surface of the outer cover 1 in the notch B. Since the optical system parts and the motor 7a, which will be described later, are arranged in the chassis 3, by doing so, if the chassis 3 is separated from the exterior cover 1 when the maintenance work of the optical system parts is desired, the power source 7 The maintenance work can be performed by taking out the optical system parts, the motor 7a, and the like separately from the main board 8 and the like.

In addition, in the chassis 3, each notch A
・ The peripheral edge of B is bent vertically upward to form rib 3a.
3b and 3c are formed. The ribs 3a, 3a formed before and after the cutout portion A function as positioning members for the power source 7, and the ribs 3b, 3b before and after the cutout portion B are provided at the upper end,
The screw plates 3d, 3d for screwing the intermediate cover 10 described later are formed. Further, since the main substrate 8 is arranged in the notch B, the ribs 3b and 3b and the ribs 3c and 3c are
It functions as a shield for radio waves emitted from the main board 8.
The upper ends of the ribs 3c and 3c are higher than the tops of the electronic components mounted on the main board 8.

Screw holes 3e and 3e for fixing the optical system fixing portion 9 having the lens 9a and the CCD 9b are formed in the central portion between the notches A and B on the bottom surface of the chassis 3. The optical system fixing portion 9 is fixed to this portion. Further, in the vicinity of one side of the cutout portion A, the screw holes 3f.
f ... is provided to screw a reduction gear connected to the motor shaft of the motor 7a, and a drive pulley 11 driven via the reduction gear is provided. Furthermore, at a position facing the drive pulley 11 in the front-rear direction, in the vicinity of one side of the notch B on the bottom surface of the chassis 3,
Screw holes 3g, 3g, ... Are provided to screw the driven pulley 12 into place.

Drive pulley 11 and driven pulley 12
Each has a large-diameter pulley and a small-diameter pulley half the diameter thereof supported on the same shaft. The large-diameter pulleys and the small-diameter pulleys of the drive pulley 11 and the driven pulley 12 have the same diameter, and the large-diameter pulleys are
And the drive belt 13 between the small diameter pulleys.
The drive belt 14 is wound to form a drive system for the optical system scanning unit described later. The drive belt 13 is driven to be conveyed at a speed twice that of the drive belt 14.

As described above, the power source 7 disposed on the bottom surface of the outer cover 1, the main substrate 8, the optical system fixing portion 9 disposed on the bottom surface of the chassis 3, the drive system (between the drive pulley 11 and the driven pulley 12). The belt system) is covered with the intermediate cover 10 from above except the drive system. As shown in FIGS. 5 and 9, the intermediate cover 10 has a two-step upper and lower staircase shape, and the upper part is placed on the upper surface of the power supply 7 and the optical system fixing portion 9 as shown in FIG. As shown in FIG. 5, the lower part is screwed to the power source 7 and covers the main substrate 8 and is screwed by the screwing plate portions 3d and 3d of the ribs 3b and 3b. When disposing the lower part on the main board 8, when the intermediate cover 10 is inserted into the chassis 3 in the direction of the arrow shown in FIG. 9, the ribs 3c, which are formed in the insertion direction of the intermediate cover 10, are formed. 3c slidably guides the lower part of the intermediate cover 10 so that the intermediate cover 10 does not come into contact with various electronic components mounted on the main board 8 below the intermediate cover 10 so that a failure can be avoided. The vertical portion of the intermediate cover 10 is provided with a slit 10a to serve as a peep hole for the lens 9a of the optical system fixing portion 9.

Above the intermediate cover 10, an optical system scanning section as shown in FIGS. 5 to 7 is arranged. The optical system scanning unit includes a light source 15a formed by arranging LEDs (light emitting diodes) and the like in the left-right direction and one first mirror 15b so that the entire width between the left and right ends of the projection glass 5 can be irradiated. The one scanning body 15 and the second scanning body 16 having the two upper and lower second mirrors 16a and 16b are arranged in parallel in the front-rear direction, and the first scanning body 15 is arranged on the large-diameter pulley. The second scanning body 16 is fixed to the drive belt 13 wound around the small-diameter pulley on the drive belt 13 wound around the two drive belts 13 and 14.
The transport drive is used to transport each in the front-back direction.

The first scanning body 15 is arranged closer to the optical system fixing portion 9 than the second scanning body 16, and the conveying speed thereof is fixed to the drive belt 13, so that the second scanning body 1 is provided.
6 times twice. The optical axis path will be described in this connection. As indicated by the optical axis L in FIG. 5, the light source 1 of the first scanning body 15
The light emitted from 5a passes through the projection glass 5 and illuminates a part of the original document G placed thereon. Then, the specularly reflected light is reflected by the first mirror 15b, horizontally directed to the second scanning body 16, reflected by the second mirror 16a, and directed vertically downward, and horizontally by the third mirror 16b. Lens 9a of the optical system fixing portion 9 which is reflected in the direction and is arranged to face the third mirror 16b.
Reach In other words, it is a two-tiered optical axis path.

As described above, the second scanning body 16 has the two mirrors 16a and 16b on the upper and lower sides, and the two mirrors 16a and 16b are used to move the first scanning body 15 in the horizontal direction from the first mirror 15b. The light is reflected in the opposite direction in the horizontal direction, and in order to always display a constant image on the lens 9a, from the first mirror 15b (strictly, the irradiation position of the projection glass 5 by the light source 15a) to the lens 9a. The length of the optical axis L up to 9a must always be kept constant. Therefore, the third mirror 16b and the lens 9a
In order to increase the distance between the second mirror 16a and the first mirror 15a by decreasing the distance between the first and second mirrors 16a and 15a, the first scanning body 15 is twice as wide as the second scanning body 16. The transport speed of

The first scanning body 15 that projects light directly onto the projection glass 5 scans between the front and rear ends of the projection glass 5, while the second scanning body 16 projects from the first scanning body 15. Since it is a medium for reflecting the projection on the lens 9a and the conveyance speed is halved, if it is scanned to the front-rear intermediate portion of the projection glass 5, that is, the front-rear intermediate portion in the exterior cover 1 (chassis 3). Good. Therefore, as described above, the intermediate cover 10 has a two-step upper and lower stepped shape.
The scanning space of the second scanning body 16 and the optical axis space between the lower third mirror 16b and the lens 9a are secured above the lower stage portion, while only the first scanning body 15 is above the upper stage portion. It is only necessary to secure the scanning space and the optical axis between the upper first mirror 15b and the second mirror 16a. By making the shape of the intermediate cover 10 and arranging the intermediate cover 10 as described above, contact between the optical system scanning portions of the first and second scanning bodies 15 and 16 and various components thereunder can be avoided. On the other hand, downsizing of the device can be realized.

The first and second scanning bodies 15 and 16 of the optical system scanning section which is thus transported and driven must be constructed so as to be slid while maintaining a constant posture. for that reason,
Utilizing the space above the portion where the drive belts 13 and 14 are arranged, a scanning guide shaft 17 is installed between the front surface and the rear surface of the chassis 3, and a part of both the first and second scanning bodies 15 and 16 is provided. A fitting insertion hole is bored in and the guide shaft 17 for scanning is penetrated.

On the side opposite to the side where the scanning guide shaft 17 is erected, if essentially the same scanning guide shaft is erected, both the first and second scanning bodies 15 and 16 are surely kept in a fixed posture. Although it is slidable, such guide shafts are not provided on both sides in order to make the lateral length of the device compact and to reduce the cost. Instead, as shown in FIGS. 6 and 7, a chassis is used. Sliding shelves (sliding shelves) arranged on the side plate 3
Place the side ends of both scanning bodies 15 and 16 on 18,
It is made to slide on this.

A method of attaching the sliding shelf 18 to the side plate portion of the chassis 3 will be described with reference to FIGS. 1 to 3. The sliding shelf 1
8 is to ensure good scanning of both scanning bodies 15 and 16,
The positioning, especially the vertical positioning, is important.
First, in the side plate portion of the chassis 3 made of sheet metal, a contact member 3h as seen in FIG. 6 and FIG. Further, the side plate portion has screw holes 3i, 3i, 3i and positioning holes 3j, 3i.
j is drilled.

The sliding shelf 18 is L-shaped when viewed from the front, and the vertical surface portion thereof has screw holes 18a, 18a.
・ While 18a is bored, positioning protrusion 1
8b and 18b project outward. The sliding shelf 1
8 is attached to the side plate portion of the chassis 3, first, the lower end portion thereof is temporarily placed on the member 3h as shown in FIGS. 1 and 2, and the vertical surface portion is attached to the side plate portion of the chassis 3. When applied, the screw holes 3i, 3i, 3i are attached to the screw holes 18a, 18i.
a and 18a are substantially the same. So, in these screw holes,
When the screws 20, 20, 20 are screwed in, the sliding shelf 18
The positioning projections 18b, 18b are naturally fitted into the positioning holes 3j, 3j of the chassis 3 as they are pressed against the side plate portion of the chassis 3, and the sliding shelf 18 is positioned.

Of the optical system scanning unit which can slide back and forth as described above, the first scanning body 15 has the light source 15 as described above.
a is provided, and in order to control the lighting thereof, a harness must be led out from the main board 8 and connected to the light source 15b. Since the first scanning body 15 moves, in order to accommodate this, the individual conductive wires of the harness are made of a flexible material, but if they are extended as they are,
The position of the harness is not fixed and interferes with the optical system scanning unit and the like. This interference also affects the scanning posture of the optical system scanning unit, and thus must be avoided. Therefore, even if the scanning unit of the optical system moves, it does not interfere with the movement of the scanning unit, and it must be able to be stored compactly.

Therefore, as shown in FIGS. 6 and 7, above the intermediate cover 10, the harness H is attached to the two tubes 19.
The tubes 19 and 19 are housed in each other, and the lengths of the tubes 19 and 19 are substantially the same, that is, the tubes 19 and
Nine breaks are located. The exposed portion of the inner harness H is formed to a certain length at this break. With this configuration, the first scanning body 1
6 slides to the state of FIG. 6 to FIG. 7, the exposed portion of the harness H between the two tubes 19 and 19 is bent, and the exterior portions of the two tubes 19 and 19 are as if they were as shown in FIG. Since the harness does not interfere with the optical system scanning unit and the like, and the harness itself is the shortest length that allows the first scanning body 15 to slide, it is compact. It has become.

When the apparatus according to the present invention is used as a read-only machine for a facsimile, a modem is mounted on the main board 8 and is connected to a telephone line, and the apparatus itself is separately connected to a facsimile. With such a configuration,
On the intermediate cover 10, the optical system scanning unit composed of the first scanning body 15 and the second scanning body 16 slides smoothly and satisfactorily while keeping the posture constant, so that the document placed on the projection glass 5 is scanned. Scanning back and forth, projecting this on the lens 9a of the optical system fixing section 9, the CCD 9b converts this into an electronic signal and transmits it to the line of the main board 8, and a facsimile or telephone line connected to this flatbed scanner. It is converted into an electronic signal that can be transmitted to an external terminal via.

[0027]

The present invention is configured as described above.
The following effects are obtained. That is, since the flat-plate projection type scanning / reading device is configured as in claim 1, if this is connected as a read-only machine to a facsimile or the like, the contents of a book, a catalog, or thick paper such as a license can be stored. Even if you do not make a copy once, that is, even if you do not have to prepare a copy machine by the side of the facsimile, you can read it by placing it on the projection glass as it is, and immediately output it to the printer of the facsimile. It is also possible to transmit to a desired partner terminal via a line by operating a key of a connected facsimile or an external telephone.

In such an apparatus, as a part of downsizing of the apparatus, in order to shorten the left and right width of the apparatus, the sliding guide of the scanning section is inserted, and the sliding shaft is inserted at one end and the other side is inserted. When the end portion is configured to be slid on the sliding shelf member, the end portion is configured as in claim 1, and therefore, when the sliding shelf member is attached to the inner side surface of the side plate, the sliding shelf member is attached. Only by temporarily placing it on the corresponding member, it is possible to easily carry out the subsequent fitting work for screwing and positioning.

Further, according to the second aspect, the corresponding member can be formed by sheet metal working easily and at low cost.

According to the third aspect of the invention, the screw holes can be aligned with each other only by temporarily placing the sliding shelf member on the corresponding member, and the screwing operation can be easily performed.

Further, according to the fourth aspect of the invention, the sliding shelf member is naturally positioned with respect to the side plate portion in the process of screwing, so that the smooth sliding movement of the scanning portion can be ensured. Therefore, it contributes to realizing good reading without disturbing the image.

[Brief description of the drawings]

FIG. 1 is a partial perspective view showing a mounting configuration of a sliding shelf 18 on a side plate portion of a chassis 3.

FIG. 2 is a partial front sectional view of the same.

FIG. 3 is a partial front cross-sectional view showing a fitting configuration of a positioning protrusion 18b into a positioning hole 3j.

FIG. 4 is a plan view of a flat-plate scanning scanner (flatbed scanner).

FIG. 5 is a sectional view taken along line XX in FIG. 4;

FIG. 6 is a plan view of the chassis 3 in a state in which an optical system scanning unit is near a scanning start end position.

FIG. 7 is a plan view of the chassis 3 in a state where the optical system scanning unit is near the scanning end position.

FIG. 8 is a partial perspective view showing a mounting configuration of the corner member 2 with respect to the exterior cover 1.

FIG. 9 is a perspective view showing the shape and attachment method of the intermediate cover 10.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Exterior cover 2 Corner member 3 Chassis 3a, 3b, 3c Rib 3d Screwing plate part 3h Abutting member 3i Screw hole 3j Positioning hole 5 Projection glass 7 Power supply 8 Main board 9 Optical system fixing part 10 Intermediate cover 11 Drive pulley 12 Driven pulley 13/14 Drive belt 15 First scanning body 15a Light source 15b First mirror 16 Second scanning body 16a Second mirror 16b Third mirror 17 Scanning guide shaft 18 Sliding shelf 18a Screw hole 18b Positioning projection 20 Screw

Claims (3)

[Claims] 1. An original document to be read is placed on a projection flat plate provided on the upper surface of the apparatus, and a reciprocating sliding scan is performed in the apparatus with a scanning unit including a light source for illuminating the original document and a mirror for image projection. In the flat-plate projection type scanning reading apparatus for performing reading by performing the reading, a contact member for temporarily supporting the sliding shelf member on which the side end of the scanning unit is slidably mounted is provided in the apparatus main body side plate section. A flat-plate projection type scanning reader characterized in that it is provided on a side surface. 2. The flat panel projection type scanning reading device according to claim 1, wherein the side plate portion is made of a metal plate, and the corresponding member is formed by bending. 3. The flat-panel projection scanning apparatus according to claim 1, wherein when the sliding shelf member is supported by a corresponding member, the screw holes of the sliding shelf member and the side plate portion are naturally aligned with each other, Furthermore, when a screw is screwed into the screw hole, the positioning projection of the sliding shelf member naturally fits into the positioning hole of the side plate portion.