JPS6127242Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a facsimile transmitter, and more particularly to a facsimile transmitter with an improved structure of a document reading section.

In recent years, with the spread of facsimile and the development of its systems, facsimile transmitters are being used in harsh environments such as places with a lot of dust, and it is becoming more common for the dust to enter the transmitter and stain the document reading section. It's here. In addition, the number of types of originals being sent has increased, and poor quality paper, carbon-backed paper, etc. are now being used as originals, and these originals are increasingly staining the original reading unit.

However, in conventional facsimile transmitters, measures against the above-mentioned dirt on the document reading section have not been sufficiently taken.

For this reason, like a store-and-forward system, the original
In facsimile transmitters that store the image information of a batch in memory and transmit the image information when necessary, even dirt on the document reading section is read as image information and stored in memory, resulting in insufficient memory capacity. It was hot.

In addition, when a reference plate for the ABC circuit is provided in the document reading section, this reference plate becomes soiled and when an original whose width is narrower than the scanning width is read, the reference level of the ABC circuit rises and the appropriate level is increased. There were times when I could not get the image signal.

Furthermore, in order to prevent these inconveniences from occurring, it is necessary to periodically clean the document reading section and other parts inside the transmitter to remove dirt, which requires time and effort for maintenance.

The present invention has been made in order to eliminate the above-mentioned conventional drawbacks, and an object of the present invention is to provide a facsimile transmitter in which the document reading section is not easily soiled.

The present invention will be described below based on embodiments shown in the drawings.

In FIGS. 1 and 2, the transmission document 1 is placed on introduction guide plates 2 and 3 facing each other as shown by arrow A.
The paper is conveyed through a path between the feed roller 4, the opposing reading section guide plates 5 and 6, the feed roller 7, and the discharge guide plate 8.

The reading section guide plate 6 is provided with a reading window 9, and the reading window 9 includes a light source 10 and a lighting lens 11.
and photoelectric conversion element 12 are opposed to each other. A portion of the reading section guide plate 5 located behind the reading window 9 has a notch 13 having a width greater than the reading width.
is formed, and at the bottom of this notch 13 is an ABC circuit reference plate 1 having a predetermined light reflectance that shows pseudo white.
4 is installed.

Therefore, the original 1 to be sent is fed by the feed roller 4,
As the scanner 7 rotates, the document is irradiated by the light source 10 through the reading window 9 while being transported between the reading section guide plates 5 and 6, and the reflected light is collected by the light collecting lens 11 and input to the photoelectric conversion element 12, whereby the document is read and scanned for transmission. In this facsimile transmitter, a notch 13 is formed in the reading section guide plate 5 behind the document reading position, so that even if dust or the like enters the inside of the transmitter from the outside or poor quality paper or carbon back paper is used as the document 1, the ABC circuit reference plate 14 attached to the bottom of the notch 13 does not come into direct contact with the back surface of the document 1 and is therefore not easily soiled. This prevents the ABC circuit reference plate 14 from being soiled as in the conventional case, and the dirt on the ABC circuit reference plate 14 is read and stored as image information, resulting in a shortage of memory capacity, or prevents the reference level of the ABC circuit from rising to make it impossible to obtain an appropriate image signal when a document narrower than the reading width is read.

Additionally, there is no need to periodically clean the reading section around the ABC circuit reference plate 14.

As described above, in the facsimile transmitter according to the present invention, the notch is formed in the part behind the document reading position of the guide plate that guides the transmitted document, so that the document reading section formed by the notch is not easily soiled. This provides an excellent effect.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a main part of an embodiment of a facsimile transmitter according to the present invention, and FIG. 2 is a perspective view of a main part of this embodiment. 1... Transmission original, 5, 6... Reading section guide plate,
9...Reading window, 13...Notch, 14...ABC
Circuit reference board.

Claims (1)

[Scope of utility model registration request] A facsimile transmitter comprising: a guide plate for guiding a transmission document; and a notch formed in a portion of the guide plate located behind a reading position of the transmission document.