JPH04326659A - Facsimile equipment - Google Patents

Abstract

PURPOSE:To attain the use of an inexpensive original carrier motor with a low torque by preventing the increase in a carrier load and a defect read caused by contact or the like between a sensor roller and a glass plate in the case of reading the original with a narrower width when the sensor roller and the glass plate are in direct contact with other at original read and at original carrying. CONSTITUTION:A transparent film 3 is employed between a read original 1 and a glass plate 2 in the facsimile equipment in which the read original 1 is in press contact onto the glass plate 2, a light radiates from a light source to the read original 1 in press contact onto the sensor roller 4 and the glass plate 2 to carry the read original 1 through an LED 5 and a CCD 7 reads the reflected light via an optical path of mirrors 6a, 6b, 6c.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile machine that is used in a facsimile reading system and uses a reading device that inputs data using a reading sensor such as a CCD.

0002

[Prior Art] Conventionally, in order to reduce the size and cost of facsimile machines and the like, in order to reduce the number of document transport rollers, reading devices have been installed on a glass plate that irradiates light onto the document and serves as a window for reading the reflected light. A method of directly arranging sensor rollers is used. Since this method allows the reading device to be made smaller, it is advantageous in reducing the size of the entire facsimile machine.

[0003] (Nikkei Electronics, October 1990
．． 29, P183 39mm thick household facsimile)

0004

[Problems to be Solved by the Invention] However, in conventional reading devices, since the affinity between the glass plate and the rubber member constituting the sensor roller is generally high, there is a high affinity between the glass plate and the rubber member constituting the sensor roller. Immediately after the sensor roller rotates due to direct contact between the glass plate and the sensor roller, the conveyance load becomes extremely large, causing a step-out in the stepping motor used as the actuator that rotates the sensor roller, causing the next This may interfere with inserting the original. This phenomenon also occurs when the width of the original to be read is narrow, and since the number of contact areas between the glass plate and the sensor roller increases, the transport load increases, making normal transport and reading of the original impossible. Furthermore, if the original is a glossy photograph or the like and the original or the glass plate is moist due to humidity in the atmosphere, the original will stick to the glass plate, making it impossible to transport the original. To prevent this phenomenon, a carrier sheet made of transparent film is usually used, but attaching a carrier sheet to each document is a cumbersome and troublesome operation. In order to cope with this increase in transport load and ensure normal operation as a reading device, the actuator must be of a powerful type, which has disadvantages such as making the entire set expensive. there were.

SUMMARY OF THE INVENTION An object of the present invention is to provide a reading device that can normally carry out document conveyance and reading even when using a low-torque actuator.

[0006]

[Means for solving the problem] In order to solve the above problem, a transparent film is placed between the original and the glass plate to prevent an increase in the conveyance load due to direct contact between the sensor roller and the glass plate. The structure is as follows. In addition, by providing a satin-like unevenness on the side of the transparent film that comes into contact with the glass plate, it is possible to prevent halation that occurs when minute wrinkles occur in the transparent film during document transportation, and to ensure accurate reading. It is said that Furthermore, by making the transparent film replaceable, even if the transparent film is scratched due to wear during use, it can be easily restored to its initial performance.

[0007]

[Operation] When a document is read by the reading device configured as described above, the sensor roller and the glass plate do not come into direct contact with each other, so that the transport load can be significantly reduced. In addition, documents such as photographs can be read without using a carrier sheet. In addition, reading performance can be maintained by replacing scratches that occur on the transparent film during long-term use.

[0008]

[Embodiments] Examples of the present invention will be explained below with reference to the drawings. FIG. 1 shows a facsimile machine embodying the present invention. A read document 1 is inserted between a transparent film 3 provided on a glass plate 2 and a sensor roller 4, and the sensor roller 4 touches the glass plate 2. The material is pressed into contact with the material and is conveyed by the rotation of the sensor roller 4. Reading original 1 is LED
5, the reflected light is reflected by mirrors 6a, 6b, and 6c.
The document information is read from the CD7. This document information is sent electronically to another facsimile via the main board 8, or is sent electronically to the thermal recording head 9 in this facsimile, and is then transferred to the thermal recording paper 11 pressed between the thermal head 9 and the platen roller 10. recorded. These sensor roller 4 and platen roller 10 are connected to the stepping motor 1.
2 is driven by a gear train not shown in this figure. Power for the stepping motor 12, paper sensitive recording head 9, etc. is supplied by a power supply board 13. These members are covered by a chassis 14, and the chassis 14a near the sensor roller 4 is used for cleaning the sensor roller 4 against jammed documents, and the chassis 14a near the thermal recording paper 11 is used for cleaning the sensor roller 4.
4b has a structure that can be opened and closed for exchanging the thermal recording paper 11, cleaning the thermal recording head 9, etc. In this embodiment, the transparent film 3 is provided for conveying the original 1 and is removably attached to the spherical chassis 14c with a screw (not shown).

According to this embodiment, the original to be read 1 is transported while being pressed between the sensor roller 4 and the transparent film 3, so that the transport load can be significantly reduced. Further, original documents such as photographs can also be read without using a carrier sheet. In addition, transparent film 3
A material with high hardness such as polycarbonate is suitable for the material, but since the transparent film 3 can be easily replaced by opening the chassis 14a, an inexpensive plastic can also be used. Further, the thickness of the transparent film 3 may be determined by designing the position where the transparent film 3 reads the focal point of the CCD 7 and comes into contact with the original 1, and the thickness of the transparent film 3 is not limited as in a complete contact reading device.

FIG. 2 shows a second embodiment of the present invention, in which a transparent film 3 is provided with fine pear-shaped irregularities 3a on the side thereof in contact with the glass plate 2. According to this embodiment, even if an out-of-plane deformation occurs in the transparent film 3 due to wrinkles or the like in the read original 1 and a non-uniform state, that is, halation occurs in the reflected light of the LED 5, the pear pattern provided on the transparent film The influence is removed by the minute unevenness 3a of the shape,
A good reading can be made.

Furthermore, FIG. 3 shows a third embodiment of the present invention, in which a transparent film 3 provided between a sensor roller 4 and a glass plate 2 is wound around a supply roller 15, and a transparent film 3 provided outside the drawing is By removing the ratchet, the transparent film 3 can be fed in fixed amounts. In this structure, when the transparent film 3 is worn out and the reading performance deteriorates, a new transparent film 3 can be supplied to return the reading performance to the initial state. Note that reading performance can be easily checked by using a facsimile device as a copying device. Furthermore, the worn transparent film 3
It is only necessary to open the shoe 14a and cut and remove it with a cutter or the like.

0012

[Effects of the Invention] According to the present invention, by disposing a transparent film between the original to be read and the glass plate, the transport load during reading can be significantly reduced, so even if a low-torque actuator is used, good performance is achieved. can be read. As a result, it is possible to reduce the size and cost of the entire facsimile machine.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a facsimile machine using a reading device of the present invention.

FIG. 2 is a cross-sectional view showing a part of a transparent film reading device using plain unevenness according to a second embodiment of the present invention.

FIG. 3 is a perspective view showing a part of a reading device in which a transparent film can be replaced according to a third embodiment of the present invention.

[Explanation of symbols]

1... Original to be read, 2... Glass plate, 3... Transparent film,
4...Sensor roller, 5...LED, 7...CCD, 12...Stepping motor.

Claims (2)

[Claims] 1. A glass plate for maintaining a read original in a predetermined position; a glass plate for pressing the read original against the glass plate;
and a sensor roller for conveying the read original by a predetermined amount, a light source for irradiating light onto the read original, a light receiving element for reading light reflected from the read original, and a sensor roller for conveying the read original by a predetermined amount. A facsimile machine comprising a thermal recording head for recording information from another facsimile, a platen roller for pressing recording paper against the thermal recording head, and an actuator for rotating the sensor roller and the platen roller. . A facsimile machine, characterized in that a transparent film is provided between the enlarged original and the glass plate. 2. The facsimile machine according to claim 1, wherein a surface of the transparent film in contact with the plate glass is provided with satin-like unevenness.