JPH0362775A - Reader for facsimile equipment - Google Patents

Abstract

PURPOSE:To avoid decrease in light quantity due to adhered dust and to prevent deterioration in the read accuracy by selecting the arrangement that a reflecting body and a read means are placed upper than the read position. CONSTITUTION:A light source 50 such as fluorescent light, an LED or a halogen lamp radiating light to a transmission original A is arranged to a tilt upper part of a read platen roller 8. An optical unit 20 is fitted to a prescribed position of a lower face of a support plate 51 placed to cover the upper face of a lower chassis, the upper part of the optical unit 20 is covered by the support plate 51 to prevent invasion of dust from the upper direction. The reflected light in the transmission original A reflected in the read position comes to an incident window 21 from the tilt lower direction in the optical unit 20, the light is reflected in a reflecting body 26 in horizontal direction, made incident in the read means 24 to read the original information. The reflecting body 26 is fitted so that its reflecting face is tilted downward somewhat.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a reading device for reading image information using reflected light from a transmission document in order to transmit image information of the transmission document in a facsimile machine.

[Conventional technology]

2. Description of the Related Art As a reading device for a facsimile machine, devices shown in FIGS. 3 and 4 have conventionally been used. Each of these reading devices uses a platen roller 6 that feeds the transmission document A.
0, a light source 6 that irradiates light onto the document surface of the transmission document A fed by the platen roller 60], and a reflection mirror or the like to form an optical path 62 of the inverse 1.1 light from the transmission document A. body 63 and a COD provided at the end of the optical path 62
A reading means 64 such as the above reads the image information. In these conventional reading devices, a light source 61 irradiates light from below to the transmitted document A, and an optical path 62 of reflected light from the transmitted document A is directed downward.

In FIG. 3, the optical path 62 per unit length is lengthened by increasing the number of reflectors 63 compared to FIG. 4, and although the reading means 64 is located below the platen roller 60 in FIG. On the other hand, in FIG. 3, the reflector 63 is connected to the platen roller 60.
is located below.

[Problem to be solved by the invention]

However, in the prior art, dust generated from the transmitted document A has an adverse effect. In FIG. 3, dust falls onto the second reflector 63 located below the platen roller 60, and the dust adheres to the upwardly facing reflective surface of the second reflector 63. Further, in FIG. 4, dust f1 is deposited on the reading means 64 below the platen roller 60, and dust is also deposited on the reflective surface of the reflector 63. The adhesion of these dusts reduces the amount of reflected light incident on the reading means 64, resulting in a disadvantage that the reading accuracy is degraded.

Further, since the light source 61 is oriented upward and emits light from below, dust tends to adhere to the light emitting surface, reducing the amount of emitted light and causing similar problems. Further, due to the adhesion of dust to these members, it is necessary to perform cleaning work frequently, and the number of maintenance operations is also increased.

Therefore, an object of the present invention is to provide a reading device for a facsimile machine that prevents dust from adhering to the reflector and the reading means.
Make it white.

[Means to solve the problem]

The reading device of the present invention irradiates light from a light source to a transmission document fed to a reading position by a platen roller, reflects anti-A=J light from the document by a reflector, reads this by a reading means, and transmits the document. The facsimile apparatus is characterized in that the reflector and the reading means are arranged above a reading position of a transmission document.

Preferably, the light source is arranged so as to irradiate the transmission document with light from above.

[Effect]

In the above configuration, since the reflector and the reading means are located above the reading position of the transmitted original, dust generated from the transmitted original does not adhere to them.

Further, by arranging the light source so as to irradiate the transmission document with light from above, the light emitting surface of the light source faces downward, thereby preventing dust from adhering to the light emitting surface.

〔Example〕

Hereinafter, the present invention will be specifically explained with reference to the drawings.

FIG. 1 shows a facsimile machine to which the present invention is applied,
Prior to a detailed explanation of the present invention, the overall configuration of a facsimile machine will be explained with reference to FIG.

The facsimile apparatus has a lower yarn 1 and an upper yarn 2 provided on a lower chassis 1, and the lower chassis 1 and the upper chassis 2 constitute a housing. The upper frame 2 of the upper chassis is configured to rotate around a pivot 3, and the interior is opened by rotating in the upright direction like a two-point interlock.

Further, the upper frame 2 is locked so as not to rotate by engaging the hook bin 4 and the hook lever 5. This kind of facsimile machine can send an image of the document to be sent↑1
A transmitter for transmitting the °J report is provided in the lower chassis 1,
A receiving section for recording received information on recording paper is provided in the upper chassis 2.

The transmitter has a pair of upper and lower guide plates 6 that serve as a transmission path for the transmitted original.
, 7, and a separation point provided at an intermediate portion of this transmission path.
A feeding device 10, a reading platen roller 8 provided at the end of a transmission path, and an optical unit 20 that reads image information of a transmitted document using reflected light from the transmitted document fed by the platen roller 8. We are prepared. Also,
A document holding device 30 is arranged close to the platen roller 8 . The pair of upper and lower guide plates 6.7 has an open opening at the left end serving as a paper feed port for the transmission document, and the transmission document is inserted into the paper feed port 9 in the form of one sheet or a plurality of sheets stacked.

The separation supply device 10 includes a separation roller ] 1 and a separation roller ] 1
a pad holder 12 biased by a spring force in the direction;
A separation pad 13 is attached to the upper surface of the pad holder 12 and comes into contact with the roller surface of the separation roller 11. The separation pad 13 is made of a rough material such as rubber or leather. This separation/feeding device KO0 transfers the transmission D'
3 and 2), the sheets are separated 17 and fed one by one to the platen roller 8. The platen roller 8 supplies the original to be transmitted from the separation/supply device 0 to the reading position S, and a light source (not shown) is disposed at the reading position S to irradiate the original to be transmitted. The original document matching device 30
The transmission original is immediately placed on the platen roller 8 so that the transmission original moves along the roller surface of the platen roller 8. This document holding device 30 includes a holding plate 31 and a leaf spring 32 that presses the holding plate 31 in the direction of the platen roller 8. The presser plate 31 has a tip portion extending parallel to the axial direction of the platen roller 8, and by connecting the tip portion to the roller surface of the platen roller 8, the document to be sent is immediately placed on the roller surface of the platen roller 8. ing.

The optical unit 20 receives the reflected light irradiated onto the transmission document at the reading position S, and reads the image information of the transmission document using the incident reflected light. The first units 1 to 20 are an optical box 2 formed so that an entrance window 2 through which reflected light from a transmission document enters and an optical path 22 for the incident light communicate with each other.
'3, and a reading means 24 such as a solid-state imaging device (CCD) attached to the end of the optical path 22 of the optical box 23. Further, on the back side of the entrance window 2], a reflector such as a mirror is arranged to reflect the reflected light from the transmitted document in the direction of the optical path 22. Reference numeral 25 denotes a shave plate provided at a predetermined portion of the optical path 22 for correction of aging.

The receiving section provided inside the cover 2 includes a roll paper stocker 41 in which a recording roll paper for recording received information is installed, a printing platen roller 42 and a print head 43 provided on the exit side of the roll paper stocker 41. We are prepared. The print head 43 may be a thermal head for thermally transferring the received information onto recording paper, or some other type. Further, on the exit side of the roll paper stocker 41, a curl removal lever 44 is disposed in a manner that makes sliding contact with the recording paper pulled out from the roll state. Furthermore, an automatic cutter 45 for cutting the recording paper into a predetermined length is provided on the exit side of the print head platen roller 42, and is guided to a υ1 paper opening 46. Such a receiving section τ is connected to the platen roller 4.
The recording paper pulled out from the roll paper stocker 41 by the simultaneous rotation of step 2 or after passing through the deformation removal lever is transferred to the print head 43.
The received information is recorded by being printed by the auto cutter 45, and then the paper is inked by the auto cutter 45 and delivered to the paper ejection port 4.
tjl is issued from 6.

In addition, at the bottom of the lower part of the lower part is a circuit board 4 equipped with an electronic circuit for controlling the entire Facunmill device.
7 and a power supply device 48 for supplying power to each part of the device including this circuit board 47 are installed.

FIG. 2 shows a main part of an embodiment of a reading device of the present invention for reading image information of a transmission document A. In FIG. A light source 50, such as a fluorescent lamp, an LED, or a halogen lamp, for irradiating light onto the transmission document A is disposed on the diagonal side of the reading platen roller 8. Further, the optical unit 20 is arranged above the platen roller 8 and the light source 50. This unit 20 has a reflector 26 such as a reflector or brism attached to an optical box 23 made of acid-containing pine resin, and a ring 1.
A condensing lens 27 is attached so as to be located within the optical path 22 of the reflected light reflected from the four bodies 26. Also,
At the end of the optical path 22, a reading means 24 is provided for reading the original information of the transmitted original by photoelectric exchange or the like. Such an optical unit 20 is attached to a predetermined position on the lower surface of a support plate 51 stretched so as to cover the upper surface of the lower shear 1, so that the upper part of the optical unit 20 is covered with the support plate 51, and the upper part of the optical unit 20 is covered with the support plate 51. This prevents dust from entering. The optical unit 20 allows the reflected light of the transmission source iA reflected at the reading position to enter the entrance window 2 from an angle,
After being reflected in the horizontal direction by the reflector 26, it enters the reading means 24 and the original information is read by 2-'1-5°. '4
Reference numeral 26 is mounted so that its reflecting surface is inclined somewhat diagonally downward. A reflective hood 52 is provided above the light source 50 to achieve maximum irradiation of the transmission thickness phase A.

In the above configuration, since the optical unit 20 including the opposite part 26 and the reading unit 24 is disposed above the platen roller 8 and positioned above the reading position of the transmitted original A, the transmitted original A is Even if dust is generated, it will not reach the reflector 26 or the reading means 24 and will not adhere to them.

Further, since the reflective surface of the anti-1/1 body 26 faces downward, dust in the air is less likely to adhere to the reflective surface. Therefore, the amount of reflected light does not decrease due to dust adhesion, and the reading accuracy of the reading means 24 can be prevented from deteriorating. Furthermore, in this embodiment, the light source 50 is arranged so as to irradiate light from above onto the transmission document A, and since the first at surface of the light source 50 faces downward, it is possible to similarly prevent dust from adhering. Along with being able to
Since the upper part of the optical unit 20 is covered by the support plate 51 of the lower chassis 1, there is little intrusion of dust. Therefore, as described above, the amount of reflected light is less reduced, and reading accuracy can be prevented from deteriorating, and the number of times of cleaning is reduced, making maintenance easier. Note that in this embodiment, the feed (≦h; i f4
Because of the 1□11 structure in which the light reflected from A is reflected only once, the ring 11 body 26 moves away from the transmitted document A, thereby preventing dust from the transmitted document A from reaching the reflector 26.

〔Effect of the invention〕

As explained above, in the present invention, the reflector that reflects the light reflected from the transmitted document and the reading means that reads the document information by the reflected light from the reflector are disposed at a position closer than the reading position of the document. The dust generated from the dust does not adhere to the reflector or the reading means, there is no reduction in the amount of light due to dust adhesion, and there is no deterioration in reading accuracy. Also, the frequency of maintenance such as cleaning is reduced.

Further, by arranging the light source so that the light emitting surface faces downward, it is possible to prevent dust from adhering to the first 11 surfaces of the light source.

[Brief explanation of drawings]

Fig. 1 is an overall configuration diagram of a facsimile machine to which the present invention is applied, Fig. 2 is a cross-sectional view showing one embodiment of the present invention, and Figs. 3 and 4 are side views showing each side of the hammer device. It is a diagram. 1... Lower Nyasi, 2...'' Nishasi, 3...
Pivot, 4...Hook pin, 5...Hook lever 6.
...Guide plate, 7...Guide plate, 8...Platen roller, 9 Paper feeding port, 10...Separation supply device, 11...
・Separation roller, 12... Pad holder] 3... Separation pad, 20... Optical unit, 2]... Entrance window,
22... Optical path, 23... Optical box, 24...
Reading means, 25. Shading plate, 26. Reflector, 27. Lens, 30. Original holding device, 31.
... Pressing plate, 32 ... Leaf spring, 50 ... Light source, A.
・Transmission thick part.

Claims (1)

[Claims] 1. A facsimile machine that irradiates light from a light source onto a transmission document fed to a reading position by a platen roller, reflects light from the document with a reflector, reads this with a reading means, and transmits it. A reading device for a facsimile machine, wherein the reflector and the reading means are arranged above a reading position of a transmitted document. 2. The reading device for a facsimile machine according to claim 1, wherein the light source is arranged to irradiate the transmission document with light from above.