JPH01279668A - Stationary original type picture reader - Google Patents

Abstract

PURPOSE:To prevent a carrier from floating up from a guide rail even if a device is attacked by shock or vibration from an external part during an operation by providing the carrier with a pressing member so as to interpose and hold the guide rail by pressing force as co-operating with a wheel. CONSTITUTION:One side of the carrier 4 is supported on the rail 10 through the wheel 9, and besides, a shaft 8 and the rail 10 are fixed in parallel with an original surface glass 5, and in addition, the wheel 9, i.e., the carrier 4 to which the wheel 9 is attached is pressed down always toward the direction of the bottom of the reader by the pressing member 21 attached to the carrier 4 as keeping the pressing force, and therefore, the wheel 9 attached to the carrier 4 rotates always as being in contact with the surface of the rail 10, and as the result, the carrier 4 moves in parallel as keeping always definite distance to an original 16 on the original surface glass 5 even at the time of the shock or the vibration, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Commercial Use] The present invention relates to a still document image reading device, and particularly to its configuration.

[Conventional technology]

FIG. 4 is a perspective view of a main part showing the structure of a conventional document static image reading device disclosed in, for example, Japanese Unexamined Patent Publication No. 60-260915, FIG. 5 is an enlarged sectional view of the reading portion of the device, and FIG.
The figure is a front view of the main part indicated by the arrow ■ in FIG. 1.

In the figure, code (1) is a rod lens array, and (2)
(3) is a photoelectric conversion element provided under this rod lens array (1), (4) is the rod lens array (1), This is a carrier on which a light source (2) and a photoelectric conversion element (3) are loaded. (5) is a document surface transparent plate material, for example, document surface glass, which is attached to the reading device main body (6) at a constant distance from the rod lens array (1). (7) is a sliding bearing provided on the negative side of the carrier (4) in the main scanning direction.
) is slidably fitted and attached to a shaft (8) fixedly provided parallel to the original image glass (5). Therefore, the carrier (4) is positioned in the main scanning direction and supported so as to be movable in the sub-scanning direction.

A wheel (9) is rotatably attached to the other side of the carrier (4), and this wheel (9) is attached to the reader body (
The carrier (4) is positioned in the vertical direction by running on a guide track, for example, a rail (10), which is fixedly provided in parallel to the document surface glass (5) on the carrier (6).

Reference numeral (11) denotes an electric circuit section, which includes a light source (2), a circuit for driving a photoelectric conversion element (3), etc., and is fixed to a carrier (4).

(12) is a stepping motor, and the mounting stay (12) is a stepping motor.
3) is fixed to the reader main body (6).

(14a) is a pulley attached to the shaft of the stepping motor (12), (14b) k'! Reading device body (6
), and both pulleys (14a
) (14b) Even if the bell in between) (15) is turned,
Ru.

A part of the belt (15) is fixed to the carrier (4), and as the belt (15) rotates, a part of the belt (15) is fixed to the carrier (4).
) moves.

(16) is a document, and when reading the image, the document surface glass (5
) Place it with the side to be read facing the glass.

Next, the operation of the above conventional device will be explained.

When reading an image, the electric circuit section (1
1) The light source drive circuit (not shown in %) in
(2), and as shown in Figure 5, turn on the original glass (
5) Irradiate the upper original (]6).

The reflected light from the original (16) is transmitted through the rod lens array (1
) K, the same magnification image is formed on the photoelectric conversion element (3).

The photoelectric conversion element (3) is driven by a drive circuit (not shown) in the electric circuit section (11) and sequentially converts it into an electric signal in the main scanning direction.

By simultaneously rotating the stepping motor (12), the power is transmitted to the carrier (4) via the pulleys (14a), (14b') and the bell (15), and the h The sliding bearing part (7) slides on a shaft (8) fixed to the reader main body (6), and the carrier (4) moves in the sub-scanning direction.

Further, the other side of the carrier (4) is supported on the V-rule (10) via wheels (9), and the shaft (8)
and rail (10) are both fixed parallel to the original glass (5), so the carrier (4) is always kept parallel to the original (16) on the original glass (5) at a constant distance. Moving.

The original (
16) is converted into an electrical signal and sent to the outside as a read image signal.

[Problem to be solved by the invention]

Since the conventional document static image reading device is configured as described above, if an external impact or vibration is applied during the reading operation, the carrier (4) will be damaged by the shutter 7) as shown in FIG. (8) as a center, rotational vibration occurs in the direction of the arrow (20), and therefore the carrier (4) (and its wheels (9)
) side moves up and down, the distance from the original glass (5) fluctuates, and it becomes impossible to always maintain a constant distance. Therefore, the light if and the reflected light from the original (16) on the conversion element (3) do not form a correct image, and the read image becomes blurred and its quality deteriorates. In the past, there was an issue of wanting to avoid this kind of deterioration in quality.

This invention was developed to solve the above-mentioned problem, and allows the carrier carrying light sources, photoelectric conversion elements, etc. to be moved between the document surface glass and the document surface without vertical movement even on the wheel side. To provide a still type image reading device for originals which can be moved while always maintaining constant intervals.

[Means for Solving the Problems] The document static image reading device according to the present invention is configured such that a pressing member is provided on a carrier, and the guiding track is held between the pressing member and the wheels with a pressing force. .

[For production]

The document static image reading device according to the present invention uses a pressing member and a wheel that are both attached to the carrier.
Since the guide track is held in place with a pressing force, the wheels that are worn on one side of the carrier will not be able to handle the damage caused by vomiting or vomiting.
Even if vibrations or the like are applied, the carrier does not lift off from the guide track and always rotates in contact with the guide track, so the distance between the carrier and the document surface plater does not change.

〔Example〕

The present invention will be explained below based on the drawings showing one embodiment thereof. In FIGS. 1 to 3, symbols (1) to (16)
) are the same as or equivalent to those shown with the same reference numerals in the conventional device.

Next, reference numeral (21) is a pressing member, and the carrier (4
) and is in contact with the lower surface of the rail (10), which is a guide track, with a pressing force, and the wheels (9) work together to clamp the rail (10), and thereby the carrier (4) is pressed down on the reader.

Next, the operation of the above embodiment will be explained.

When reading an image, the electric circuit section (11
) in the light source (2) by the light source drive circuit (not shown in %)
is turned on to illuminate the original (16) on the original glass (5).

The reflected light from the original (16) is transmitted through the rod lens array (1
), the image is formed at the same magnification on the photoelectric conversion element (3).

The photoelectric conversion element (3) is driven by a drive circuit (not particularly shown) in the electric circuit section (1) and sequentially converts it into an electric signal in the main scanning direction.

By simultaneously rotating the stepping motor (12), its power is transmitted to the carrier (4) via the pulleys (14a), (14b) and Pel (15),
The slide bearing provided on the carrier (4) slides on a shaft (8) whose portion (7) is fixed to the reader main body (6), and the carrier (4) moves in the sub-scanning direction.

Further, one side of the carrier (4) is supported on a rail (10) via wheels (9), and the shaft (8) and V-ru (10) are connected to the document surface glass (5). By means of a pressing member (21) which is fixed parallel to the carrier (4) and is attached with a pressing force to the carrier (4),
The wheel (9), i.e. the carrier (4) on which the wheel (9) is attached, is always pressed downwards on the reader, so that the wheel (9) attached on the carrier (4) is always on the sole. The carrier (4) is rotating while contacting the surface of (10), and as a result, the carrier (4) collides.

Even if there is vibration etc., the original (16) on the original glass (5)
) and always move parallel to it, keeping a constant distance.

By scanning the carrier (4), which is constructed and operated as described above, in the sub-scanning direction and repeatedly reading in the main scanning direction, the original (16) on the original glass (5) is converted into electric signals. It is converted and sent to the outside as a read image signal.

In the above embodiment, a plate spring is used as the pressing member (21), but the pressing member (21) may be formed of a coil spring and a wheel, a torsion bar spring, rubber, or the like.

Furthermore, in the above embodiment, the rod lens array (1) directs the reflected light from the original onto the photoelectric conversion element (3) in a ratio of 1:1.
Although we have shown a close-contact type reader that forms an image on a photoelectric conversion element and reads it, some V lenses may also be configured as a reduction type reader that reduces the reflected light from the document and forms an image on a photoelectric conversion element for reading. In many cases, the same effects as in the above embodiment can be achieved.

Further, in the above embodiment, two fluorescent lamps were used as the light source, but the number is not limited, and
Other sources such as LEDs may also be used.

Furthermore, the document surface glass (5) may be made of a transparent hard resin plate.

Furthermore, it goes without saying that the friction of the guide track, such as the V-ru surface, in contact with the pressing member plate can be reduced with lubricating oil or the like, and the shape of the rail is not particularly limited.

〔Effect of the invention〕

As described above, according to the present invention, since the pressing member is provided on the carrier so as to clamp the guide track with a pressing force in cooperation with the wheels, the carrier is pressed downward toward the reading device, and thus Since the wheels installed on the sides of the carrier do not always press against the guide track, the gear rear will not lift off from the guide track even if it receives an external impact or vibration during the reading operation. Therefore, the photoelectric conversion element on the carrier and the transparent plate material on the document surface always move parallel to each other with a constant distance between them, and as a result, the reflected light from the original is always correctly focused on the photoelectric conversion element, resulting in a good image. The original image quality is obtained, and furthermore, even when the reading device is moved, the light source or rod lens array on the carrier does not collide with the transparent plate material on the document surface, and damage to the reading device can be prevented. This has the effect of a still shadow image reading device.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of essential parts of a still document image reading neck according to an embodiment of the present invention, FIG. 2 is a front sectional view taken from the arrow ■ in FIG. 1, and FIG. 3 is an arrow shown in FIG. 1. 4 is a perspective view of the main parts of a conventional document static image reading device; FIG. 5 is a sectional side view of the reading snowmaking optical system shown in FIG. 4; FIG. 6 is a front cross-sectional view taken from the direction of the arrow ■ in FIG. 4. In the figure, (2)... light source, (3) - Kokoutun conversion purple, (4
)・Fist carrier, (5)・Transparent plate material for the document surface (document surface glass), (6)・Reading device main body, (9)・・Wheels, (
10)...Guide track (rail), (16)...Manuscript, (
21)...Press member. In each figure, the same reference numerals indicate the same or corresponding parts. 1 Indication of the case Japanese Patent Application No. 1983-107603 2 Title of the invention Manuscript static image reading device 3 Person making the amendment Relationship to the case Patent applicant Address 12-3, Marunouchi 2-chome, Chiyoda-ku, Tokyo
Name Name (601) Mitsubishi Electric Corporation Representative Moriya Shiki 4 Agent address 4th floor, 5th Marunouchi Building, 2-4-1 Marunouchi, Chiyoda-ku, Tokyo Subject of amendment 6 The detailed statement of amendments has been corrected as follows. do.

Claims (1)

[Scope of Claims] A document surface transparent plate material on which a document is placed for printing, a light source that irradiates the document placed on the document surface transparent plate material, and a light source that reflects light from the document surface from the light source. A photoelectric conversion element that converts into an electric signal, and a wheel that carries the light source, photoelectric conversion element, etc., and rolls on a guide track that is attached to the main body of the reader parallel to the transparent plate material on the document surface. A document stationary image reading device comprising a carrier that moves parallel to the surface transparent plate material, characterized in that the carrier is provided with a pressing member configured to press and sandwich the guide track together with the wheels. A static document image reading device.