JPH0361241A - Document retaining device for facsimile apparatus - Google Patents

Abstract

PURPOSE:To enhance the degree of parallelism between a platen roller and a retaining plate by providing stoppers in the vicinity of journal parts of the platen roller so that these stoppers abut against both sides of the forward end part of the retaining plate so as to position the retaining plate. CONSTITUTION:Stoppers are arranged in the vicinity of journal parts of a platen roller 8, and accordingly, the distance (d) between each of the stoppers and the associated journal part of the platen roller is set to be short. With this arrangement, the relative positional relationship between the stoppers 33 and the platen roller 8 is satisfactory, and the forward end part of a retaining plate 31 abuts against the stoppers 33 so as to be positioned. Meanwhile, the forward end part of the retaining plate 31 may be positioned relative to the platen roller 8 by means of the stoppers 33, and accordingly, the degree of parallelism between the forward end part of the retaining plate 31 and the platen roller 8 can be obtained with a high degree of accuracy while the forward end part of the retaining plate 31 making uniform contact with the surface of the platen roller 8. Accordingly, irregularity in pressing force against a sheet of document A to be transmitted can be eliminated, thereby it is possible to prevent the document sheet A from slanting.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a document holding device for a facsimile machine that suppresses a transmission document fed to a reading position for transmitting a document image against a platen roller.

[Conventional technology]

FIG. 5 shows a document holding device conventionally used in facsimile machines. A presser plate 60 whose tip portion is bent in the direction of the reading platen roller 61;
Two springs 62 are provided, one end of which is hooked to both ends of the rear end, and the other end of which is hooked to a support member (not shown) such as the main body of the facsimile machine. Presser plate 60
A bracket part 63.63 is cut and raised at the middle part of the left and right end faces, and this bracket part 63.6
By inserting a bottle (not shown) provided in the main body of the facsimile machine into 3, the holding plate 60 can be rotated.

The springs 62, 62 are hooked to both ends of the rear end of the presser plate 60, thereby suppressing the spring force shown by arrow F and lowering the plate 60.
As a result, the tip of the presser plate 60 comes into contact with the roller surface of the reading platen roller 61 and presses the transmission document fed by the platen roller 61.

[Problem to be solved by the invention]

However, in the conventional document holding device, since the bracket part 63 that supports the holding plate 60 is separated from the tip that contacts the platen roller 61, it is difficult to bring the entire tip of the holding plate 60 into uniform contact with the platen roller 61. Although positional accuracy is required, it is difficult to improve this accuracy.

If the positional accuracy is poor, the presser foot 60 cannot contact the platen roller 61 with a uniform pressing force,
This causes the inconvenience of causing the document to be skewed.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a document holding device for a facsimile machine that can easily obtain positional accuracy of a holding plate with respect to a platen roller and can prevent the document from being skewed.

[Means to solve the problem]

The present invention provides a platen roller that rotates to feed a transmission original to a reading position, a presser plate that presses the original against the platen roller by contacting the longitudinal end portion of the platen roller in the axial direction, and a presser plate that presses the original against the platen roller. A stopper is provided near the branch and abuts against both ends in the longitudinal direction of the presser plate so that the tip of the presser plate contacts the platen roller in parallel with the axial direction. do.

[Effect]

When the stopper comes into contact with both ends of the presser plate, the presser plate becomes parallel to the platen roller, but since the stopper is located near the shaft support of the platen roller, the relative positional accuracy with the platen roller can be accurately controlled. It is easy to obtain.

〔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 device has a lower chassis 1 and an upper chassis 2 provided on 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 as shown by the two-dot chain line.

Further, the upper frame 2 is locked so as not to rotate by engaging the hook pin 4 and the hook lever 5. In such a facsimile machine, a transmitting section for transmitting image information of a transmission document is provided in the lower chassis 1, and 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, a separating and feeding device 10 provided directly in the middle of the transmission path, a reading platen roller 8 provided at the end of the transmission path, and a transmission document fed by the platen roller 8. and an optical unit 20 that reads the image information of the transmitted document using the reflected light. Further, a document holding device 30 is arranged close to the platen roller 8 . The pair of upper and lower guide plates 6 and 7 have an open opening at the left end serving as a paper feeding port for the transmission original, and the transmission original is fed into the paper feeding port 9 in the form of one or more stacked sheets.

The separation supply device 10 includes a separation roller 11 and a separation roller 11.
a pad holder 12 biased by a spring force in the direction;
A separation pad 13 that contacts the roller surface of the separation roller 11 is attached to the upper surface of the pad holder 12. The separation pad 13 is made of a rough material such as rubber or leather.

This separation/supply device Ij10 separates transmission documents pushed into the paper feed port 9 in a stacked state using a separation roller 11 and a separation pad 13, and supplies the documents one by one to the platen roller 8. The platen roller 8 supplies the original to be transmitted from the separation/supply device 10 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 document holding device 30 presses the transmitted document against the platen roller 8 so that the transmitted document 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 temporary presser 31 in the direction of the platen roller 8 .

The presser plate 31 extends so that its tip end is parallel to the axial direction of the platen roller 8 , and by connecting this tip portion to the roller surface of the platen roller 8 , it presses the transmitted document against 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 image information of the transmission document using the incident reflected light. The optical unit 20 includes an entrance window 21 into which reflected light from a transmission document enters, an optical box 23 formed so that an optical path 22 of the incident light communicates with each other, and a solid-state image sensor attached to the end of the optical path 22 of the optical box 23. (CCD) or other reading means 24. Further, on the back side of the entrance window 21, 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 for shading correction provided at a predetermined portion of the optical path 22.

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. As the print head 43, a thermal head for thermally transferring the received information onto recording paper, or some other type of head is used. Further, on the exit side of the roll paper stocker 41, there is a curl removal lever 44 that elastically slides into contact with the recording paper pulled out from the roll state.
is located. 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 paper discharge port 46 . In such a receiving section, the recording paper pulled out from the roll paper stocker 41 by the rotation of the platen roller 42 is
After passing through the curl removal lever, the received information is recorded by being printed by the print head 43, and then,
The paper is cut by the auto cutter 45 and discharged from the paper discharge port 46.

Note that, at the bottom of the lower chassis 1, there is a circuit board 4 on which an electronic circuit for controlling the entire facsimile machine is mounted.
7 and a power supply device 48 for supplying power to each part of the device including this circuit board 47 are installed.

A document arranging device 30 of the present invention applied to such a facsimile machine is shown in FIGS. 2 and 3. The holding plate 31 of the document holding device 30 extends in the axial direction of the reading platen roller 8, and its tip portion contacts the roller surface of the platen roller 8. This presser plate 31 has its rear end attached to the lower chassis 1 of the facsimile machine shown in FIG. It acts to press the transmission document A fed by the rotation of 8.

In the figure, reference numeral 33 denotes a stopper for positioning the presser plate 31 at both ends thereof. Positioning by the stopper 33 is
This is done by abutting both ends of the presser plate 31 in the longitudinal direction against the stopper 33. For this purpose, a contact piece 34 folded back at right angles is formed on both sides of the tip portion of the presser plate 31. Positioning is performed by the contact piece 34 contacting the stopper 33. Such a stopper 33
One end is pushed into the side plate 1a of the lower chassis 1 and fixed, so that the contact piece 34 of the holding plate 31 is in contact with the other end. This stopper 33 is attached to the side 1i21a so as to be close to the shaft support of the platen roller 8, and by installing such a stopper 33, the positional accuracy of the presser plate 31 with respect to the platen roller 8 can be easily adjusted.
Moreover, it is easily obtained.

FIG. 4 shows this relationship, and as the stopper 33 approaches the shaft support of the platen roller 8, the distance d between the stopper 33 and the shaft 8a of the platen roller 8 becomes shorter.

Thereby, the stopper 33 has a good relative positional relationship with the platen roller 8, and this stopper 33
The abutment plate 34 at the tip of the presser plate 31 comes into contact with the presser plate 3
1 is positioned. On the other hand, since the tip of the presser plate 31 is positioned relative to the platen roller 8 via the stopper 33, the tip of the presser plate 31 and the platen roller 8
The parallelism between the platen roller 8 and the platen roller 8 can be achieved with high accuracy, and the entire tip portion of the presser plate 31 comes into uniform contact with the roller surface of the platen roller 8. Therefore, the pressing force of the transmitted document A is not unevenly distributed, and the transmitted document is prevented from being skewed.

In FIG. 3, reference numeral 35 is a retaining piece connected to the abutment piece 34 of the temporary presser foot 31, and when lifting the presser plate 31 manually, it comes into contact with the stopper 33 and prevents the presser plate 31 from moving upwardly. is regulated. In FIG. 4, reference numeral 26 denotes a light source that irradiates the transmission document A with light.

〔Effect of the invention〕

As explained above, the present invention provides a stopper located near the shaft support of the platen roller, and this stopper abuts both sides of the tip of the presser plate to position the presser plate. Accurate parallelism with
Moreover, it can be obtained with a simple configuration. Therefore, the presser plate uniformly contacts the platen roller, thereby preventing the original to be sent from being skewed.

[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 front view showing an embodiment of the present invention, Fig. 3 is a side view thereof, and Fig. 4 is a diagram showing the structure of a stopper and a platen roller. FIG. 5 is a side view showing the correlation, and FIG. 5 is a perspective view showing a conventional document holding device. 1...Lower chassis, 2...Upper chassis, 3...Pivot, 4...Hook bin, 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 13.
...Separation pad, 20...Optical unit, 21...
Entrance window, 22... Optical path, 23... Optical box, 2
4...Reading means, 2.5...Shading board, 3
0... Original holding device, 31... Holding plate, 32...
Leaf spring, 33... Stopper, 34... Contact piece. ``Tora'' Kii 1's Battle of the Arms Φ's Cry Kanmata Diagram and the 1st page of the silence.

Claims (1)

[Scope of Claims] A platen roller that rotates to feed a transmission document to a reading position; a presser plate that presses the document against the platen roller by contacting the longitudinal end portion of the platen roller in the axial direction; and the platen roller. and a stopper that is located near the shaft support of the platen roller and abuts against both ends of the presser plate in the longitudinal direction so that the tip portion of the presser plate contacts the platen roller in parallel with the axial direction. Features: Document holding device for facsimile machines.