JPH0361240A - Document retaining device for facsimile apparatus - Google Patents

Abstract

PURPOSE:To prevent a sheet of document to be transmitted from slanting, by supporting the longitudinal center part of a retaining plate on a single fulcrum while allowing the urging force of a spring to act upon the longitudinal center part of the retaining plate so that forward end part of the retaining plate makes contact with a platen roller by a uniform pressing force. CONSTITUTION:A retaining plate 30 is supported in its center part on a single fulcrum, and a spring force is applied to only the center part thereof. With this arrangement, the forward end part of the retaining plate 30 makes contact, in its entirety, with the surface of a platen roller 8 by a uniform pressing force, and accordingly, the pressing force against the roller 8 is made to be uniform. As a result, the pressing force can be uniformly applied also to a sheet of document A to be transmitted, thereby it is possible to prevent a sheet of document from slanting.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a facsimile machine that presses a transmission document fed to a reading position against a printer/roller in order to transmit one document image. The present invention relates to a document holding device.

[Conventional technology]

FIG. 4 shows a document holding device 17' conventionally used in facsimile machines. A presser foot 60 whose tip part is bent in the same direction as the reading pulley 761, and a presser plate 6.
The spring 62 is provided with two springs 62 and 62, one end of which is hooked to both ends of the rear end of the facsimile machine, 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 6
o has a bracket part 63.63 in the middle part of the left and right end faces.
is cut and raised, and a pin (not shown) provided on the main body of the facsimile machine is inserted into this bracket portion 63, so that the holding plate 60 can be rotated.

The springs 62, 62 are hooked to both ends of the rear end of the presser plate 6o, so that the spring force shown by the arrow F is applied to the presser plate 6o.
As a result, the tip of the temporary presser 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, the presser plate is supported at two points by bracket parts 63, 63 provided on the left and right sides of the holding plate 60 and pins of the main body held by the bracket parts, and the left and right support points are aligned. If not, presser foot [
The tip of the roller 60 hits the reading platen roller 61 unevenly, and the pressing force on the roller 61 becomes uneven. Therefore, there is an inconvenience that the document to be transmitted is fed in a skewed state. In addition, the pressing force on the roller 61 also varies depending on the spring force of the two springs 62, 62, and if the spring forces of these springs 62 and 62 are not balanced, the document to be sent may skew in the machine. There is.

The present invention has been made in consideration of the above circumstances, and an object of the present invention is to provide a document holding device that can prevent a transmitted document from being skewed.

[Means to solve the problem]

The document holding device of the present invention includes a holding plate whose elongated tip portion contacts the axial direction of the platen roller that feeds the transmitted original to a reading position and presses the original against the platen roller, and a holding plate that presses the original against the platen roller. In the document holding device of a facsimile machine, the holding plate is supported at a central portion in the longitudinal direction by a single point support;
The spring is characterized in that the spring is provided so that its pressing force acts on a central portion of the pressing plate in the longitudinal direction.

[Effect]

By supporting only the center portion of the presser plate at one point and applying the pressing force of the spring only to the center portion, the entire tip of the presser plate abuts against the platen roller with uniform force.

〔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.
The housing is made up of fM and the upper chassis 2. 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 bin 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 at the intermediate portion of the transmission path, a reading platen roller 8 provided at the end portion of the transmission path, and reflections from the transmitted document fed by the platen roller 8. The apparatus includes an optical unit 20 that reads image information of a transmitted document using light. Further, a document holding device 30 is arranged close to the platen roller 8 . The left end opening of the pair of upper and lower guide plates 6 and 7 serves as a paper feed port 9 for a transmission document, and the transmission document is pushed into the paper feed 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 separating/feeding device 10 separates transmission documents inserted into a paper feed port 9 in a stacked state using a separation roller 11 and a separation pad 13 and supplies them one by one to a 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. I'm well behaved. 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, at the exit (1111i) of the roll paper stocker 41, a curl removal lever 44 that elastically slides into contact with the recording paper pulled out from the roll state is arranged. An auto cutter 45 is provided to cut the recording paper to a predetermined length, and a paper output port 46 is provided.
guided by. In such a receiving section, received information is recorded by printing on the recording paper pulled out from the roll paper stocker 41 by the rotation of the platen roller 42 or by the print head 43 after passing through the curl removal lever. Thereafter, 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.

An embodiment of a document holding device 30 of the present invention applied to such a facsimile machine is shown in FIGS. 2 and 3. The temporary 31 is formed with a tip portion 33 extending in the same direction as the axial direction of the reading platen roller 8, and a rear end portion 34 integrally connected to the rear side of the tip portion 33. ing.

The tip portion 33 is bent in the direction of the platen roller 8, and a portion close to the platen roller 8 contacts the roller surface of the roller 8 in the axial direction. Due to this contact, the transmission document A fed by the platen roller 8 is suppressed. In contrast to the tip portion 33, the rear end portion 34 extends rearward in an arc shape with the longitudinal centerline 35 of the tip portion 33 as the apex, and has a mounting hole 36 formed in the center thereof. , there is. The attachment hole 36 is formed at a position such that the center line 35 passes through the center, and is attached to the lower chassis 1 of the facsimile machine. For this reason, a bottle provided on the lower chassis 1 side is inserted into the mounting hole 36 to support the presser foot 131 at one point, but the mounting hole 36 has a larger diameter than this bottle. 31 can swing in the left and right direction (arrow in FIG. 2) in a somewhat free state.

In FIGS. 2 and 3, F is the point of action where the leaf spring 32 (see FIG. 1) comes into contact with the presser plate 30 and the spring force of the temporary spring 32 acts. This point of action F is the center line 35
The support portion of the temporary presser 30 to the lower chassis 1 and the point of action of the leaf spring 32 are both located at one point in the center of the presser plate 30.

In the above configuration, the presser plate 30 is supported at one point in the center, and the spring force acts only on the center, so the entire tip comes into uniform contact with the roller surface of the platen roller 8 and the pressure on the roller 8 is increased. The pressing force can be equalized. Therefore, since the pressing force can be applied uniformly to the original document A, it is possible to prevent the original document from being skewed.

Furthermore, since there is only one support point for the presser plate and one point of application of the spring force, there is no need for adjustment with other support points or application points, and the structure is simplified.

〔Effect of the invention〕

As explained above, the present invention supports the presser plate whose tip portion contacts the platen roller at only one location in the central portion thereof, and applies a spring force to the central portion.
It comes into contact with the platen roller with a uniform pressing force, and can prevent the original to be sent from being skewed. Moreover, the installation does not require any time adjustment, making it easy to attach to a facsimile machine, and the structure is simple.

[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 a conventional document holding device. FIG. 1...Lower palm, 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 path, 20...Optical unit, 2nd...
Entrance window, 22... Optical path, 23... Optical box, 2
4... Reading means, 25... Shading board, 30
... Document holding device, 31... Holding plate, 32... Leaf spring, 33... Tip portion, 35... Center line, 36...
··Mounting holes.

Claims (1)

[Claims] A holding plate whose longitudinal end portion contacts the axial direction of the platen roller that feeds the transmitted original to the reading position and presses the original against the platen roller, and a spring that presses the holding plate in the direction of the platen roller. In the document holding device of a facsimile machine, the holding plate is supported by a single point support at a longitudinally central portion thereof, and the spring is provided so that its pressing force acts on the longitudinally central portion of the pressing plate. A document holding device for a facsimile machine, characterized in that: