JPH0250565A - Facsimile equipment - Google Patents

Abstract

PURPOSE:To decrease frictional force applied to an image sensor by tilting a dynamic reference line to link the pivotting part of the image sensor elastically held with an elastically holding means and the contact point of a platen roller toward the extracting side of an original away from the center of a platen roller axis. CONSTITUTION:A supporting member 17 of an image sensor 16 is set so that a dynamic reference line L to link the pivotting part of the image sensor 16, namely a pin 18, and a contact point C of a platen roller 15 may tilt toward the extracting side of an original B away from the center of a shaft 15a of a platen roller 15. When the original is copied and transferred, the original B is sent to the extracting side by the driving force of a stepping motor while slidingly making contact with the reading surface of the contact image sensor 16. During a time until the next original is sent, the platen roller 15 frictionally makes contact with the reading surface of the image sensor 16, whereas, at such a time, a part of frictional force F operates the image sensor 16 as partial force (f) orthogonal to the reference line L, and the force is made into the rotation driving force to the image sensor 16. Thus, the frictional resistance between the platen roller 15 and the image sensor 16 is decreased, and the burden to the stepping motor is eliminated.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a facsimile apparatus that reads a document to be copied and transmitted by supplying the document between an image sensor for reading the document and a platen roller.

[Summary of the invention]

The present invention is a facsimile device that can reduce the frictional force between a platen roller and an image sensor.

[Conventional technology]

A facsimile machine has the function of thermally transferring the transmitted information onto a fed-out thermal recording roll paper, and also supplies the document fed by a paper feed roller between an image sensor for reading the document and a platen roller. It has the function of reading a manuscript and transmitting the read information to a required location using a telephone line, or copying it. The original is passed between the platen roller and the reading surface of the image sensor by the frictional contact pressure of the platen roller. In this case, in conventional paper feeding AM, the drag resistance when the platen roller is in direct sliding contact with the image sensor is greater than the drag resistance when the document is fed between the platen roller and the image sensor. The resistance is greater.

[Problem to be solved by the invention]

The problem here is that a stepping motor is used to drive the platen roller, but in order to withstand the large frictional resistance between the platen roller and the image sensor, the output of the stepping motor must be It is necessary to increase the torque. For this reason, it is necessary to drive a stepping motor at a high voltage (for example, 24
), which increases the load on the motor, causing problems such as heat generation and increased power consumption. The present invention has been made based on the above circumstances, and is a facsimile apparatus configured to support the image sensor in a direction that reduces the frictional force applied to the image sensor by the platen roller when the platen roller directly contacts the image sensor. This is what we are trying to provide.

[Means to solve the problem]

Therefore, in the present invention, in a facsimile machine in which a document fed by a paper feed roller is fed between an image sensor for reading the document and a platen roller to read the document, An image sensor is disposed with a reading surface in contact with the platen roller, and elastic holding means is provided to elastically support the image sensor, and a mechanism connecting a pivot supporting the image sensor and a contact point of the platen roller is provided. The target reference line is tilted toward the document ejection side from the center of the axis of the platen roller.

【Example】

EMBODIMENT OF THE INVENTION Hereinafter, this invention will be specifically explained based on the Example of drawing. In the figure, reference numeral 1 denotes the chassis of the facsimile machine, with a rear case on the rear surface, a top cover 3 covering the storage section 1a for storing the recording roll paper A made of thermal paper on the top surface, and a top cover 3 on the front top surface of the facsimile machine. An operation panel 4 is attached to each. A printed circuit board 5 is mounted on the inner bottom surface of the chassis 1 in correspondence with a space in which electronic control parts necessary for the facsimile are installed, and switch elements 6 are arranged on the operation panel 4. The operation panel 4 is supported by a pivot member 7 on both front side walls of the chassis 1, and a guide plate 9 is disposed with a predetermined gap from a paper feed guide 8 provided on the front upper surface of the chassis 1. This guide plate 9
A separation piece 11 is provided through a slit 1G. The separation piece 11 is pivotally supported on both side walls of the operation panel 4 by a pivot pin 12, and a lifting arm 1
1a. A lever 13 for lifting the separation piece 11 by engaging the arm 11a is pivotally supported on the pivot member 7. A paper feed roller 14 is disposed on the upper front surface of the chassis 1, facing the separation piece 11, and a platen roller 15 for reading a document is supported by a shaft at the position of the pivot member 7. has been done. A contact image sensor 16 is disposed below and opposite to the platen roller 15, and a support member 17 that supports the image sensor 16 is located at an intermediate position in the longitudinal direction of the platen roller 15. It is pivotally supported by a pin 18. Further, the support member 17 is located at both ends of the image sensor 16, and springs 19 are attached to both side walls of the chassis 1.
It is suspended. Note that reference numeral 20 in the figure is a stopper that restricts the amount of rotation of the support member 17 by the spring 19. In this case, as shown in FIG.
A mechanical reference line connecting the pin 18 that pivots the platen roller 15 and the contact point C of the platen roller 15 is inclined toward the document B discharge side with respect to the center of the shaft 15a of the platen roller 15. As in, the image sensor 16. In other words, the support structure of the support member 17 is set. The top cover 3 is pivotally supported on both sides of the chassis 1 by pins 21, and includes a guide plate 22 that guides the recording roll A in the storage section 1a, and a hook that engages with a hook pin 23 provided on the chassis 1. Lock lever 2 with 24a
4 is pivotally supported by a pin 25, and a thermal head 2 that thermally prints information on the recording roll paper A faces a platen roller 26 that is pivotally supported on the rear upper surface of the chassis 1.
It is equipped with 7. In addition, the reference numeral 28 in the figure is a guide plate provided in the rear game 2 for discharging the recording roll A. In such a configuration, a plurality of originals B are inserted between the paper feed guide 8 and the guide plate 9, a target location is designated by key operations on the operation panel 4, and the originals are copied and transferred there. At this time, by the action of the separating piece 11, the original B is fed sheet by sheet to the paper feed roller 14, and guided between the platen roller 15 and the contact image sensor 16. At this time, by the driving force of a stepping motor (not shown) applied to the platen roller 15, the document B is sent to the discharge side while slidingly contacting the reading surface of the contact image sensor 16. Then, while the next document is being fed, the platen roller 1
5 comes into frictional contact with the reading surface of the image sensor 16, but at this time, part of the frictional force F is the reference #! This acts on the image sensor 16 as a component force f perpendicular to L, and this becomes a rotational driving force to the image sensor 16. In this way, the frictional resistance between the platen roller 15 and the image sensor 16 is reduced, and no burden is placed on the stepping motor.
Finally, the raw material 81B is sent out from the front discharge port 29. The document B is transferred as described above. In addition, as shown in FIG. 5, the support member 17 is pivoted as follows.
An arm 17a extending from the support member 17 instead of the pin 18
It may also be supported by upper and lower knife joints 18' provided on the chassis side for pivotal support. Further, when the image sensor 16 is pushed in the direction of the arrow due to friction between the platen roller 15 and the image sensor 16, a part 16a of the image sensor 16 is guided by the guide surface 30 provided on the chassis side and is guided downward (in the direction of the arrow). The structure of the guide surface 30 and the part 16a of the image sensor 16 may be set so that the guide surface 30 and the part 16a of the image sensor 16 slide toward each other. In this case, by suppressing the vertical movement with the knife 18' and applying downward force with the guide surface 30,
When the image sensor 16 moves in the H document supply direction due to the rotation of the platen roller 15, the frictional force between the two decreases.

【Effect of the invention】

The present invention, as described in detail above, pivots the image sensor and holds it elastically with a flexible holding means, so that even if the platen roller directly contacts the image sensor and a driving force is applied to the image sensor, the friction resistance force is suppressed. Since the load on the stepping motor that drives the platen roller can be reduced, the drive voltage can be lowered, and heat generation can be avoided and the amount of consumed power can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a vertical side view showing an embodiment of the present invention, Fig. 2 is a perspective view of the main parts, Fig. 3 is a front view of the main parts, Fig. 4 is a side view showing the mechanical relationship, and Fig. 5 is a side view showing the mechanical relationship. The figure is a side view of another embodiment. 15...Platen roller 16...Image sensor 17...Support member 18...Bin 19...Spring Fig. 3 Fig. 4

Claims (1)

[Claims] In a facsimile machine that reads a document fed by a paper feed roller between an image sensor for reading the document and a platen roller, a scanning surface is placed on the platen roller opposite to the platen roller. An image sensor to be brought into contact is provided, and a holding means is provided to elastically hold the image sensor, and a dynamic reference line connecting the contact point of the platen roller and a pivot point for supporting the image sensor is arranged such that a mechanical reference line connects the contact point of the platen roller. A facsimile device characterized in that the facsimile device is configured to be inclined toward the document ejection side with respect to the center of the axis of the roller.