JPH05176108A - Facsimile equipment - Google Patents

Abstract

PURPOSE:To make facsimile equipment compact and light in weight. CONSTITUTION:A hollow platen roller 40 is provided to be used for both reading and recording. A cam shaft 26 is arranged in the hollow platen roller, and cams 30 and 32 are provided at both terminals of the cam shaft. Around the hollow platen roller 40, a reading head 50 and a recording head 60 (or a recording paper sheet pressing means) are arranged in operational relation to the cams. With the operations of these cams, the reading head, the recording head or the recording paper sheet pressing means in place of the recording head is selectively touched onto the external surface of the hollow platen roller.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile machine, and more particularly to a structure of a platen roller for a facsimile machine which can reduce the size and weight of the entire facsimile machine. Since the present invention is preferably applied to a facsimile machine, the term "facsimile machine" is simply used in the description of the above-mentioned claims and specification, but the present invention is not limited to the facsimile machine. Is not limited to devices commonly referred to as read heads, or recording heads, or other devices that use both heads, such as image scanners, printers,
It includes a copier, a PC modem, and a composite device including a facsimile device and any combination thereof.

[0002]

2. Description of the Related Art A facsimile machine includes a transmitting structure section,
And a receiving structure. The transmitting structure generally includes a reading head, a roller that is driven so as to sandwich and convey a document between the reading head, a motor and a gear that drive the roller, and a document guide and the like. ..
On the other hand, the receiving structure generally includes a recording head, a platen roller that is driven so as to sandwich and convey a document between the writing head, a motor and a gear that drive the platen roller, and the like.

As described above, generally, the facsimile machine also has two motors and two rollers.
However, in order to reduce the size and the weight, it has been proposed to use both a reading motor and a recording motor and use only one motor. In this case, an electromagnetic clutch, a one-way clutch, or the like is used for switching between reading and recording operations. Furthermore, in addition to the use of one dual-purpose motor, it has also been proposed to use a single platen roller for both the original feeding roller and the recording roller (Japanese Patent Laid-Open No. 62-62).
126765). In the facsimile apparatus of this publication, the reading and recording operations are switched by driving a small motor and moving the holder left and right via a rack and a pinion to switch the pressure contact of the platen roller to the reading head and the recording head. Is going. In general, the method of switching the pressure contact between the reading head and the recording head with respect to the platen roller has a drawback that the copying function cannot be performed.

[0004]

As described above, the small size,
Conventional lightweight devices generally use one motor and two rollers, and a device using one motor and one roller has been proposed, but it is small for switching between reading and recording operations. Since a motor is used, it is practically 2
It can be said that one actuator is used. As described above, in the conventional device, a device that uses one motor and one roller to reduce the size and weight has not been proposed.

Therefore, an object of the present invention is to provide a novel facsimile apparatus using one motor and one roller (platen roller for both reading and recording), which is further reduced in size and weight. ..

[0006] Specifically, an object of the present invention is to provide a novel facsimile apparatus which can be reduced in size and weight by using a hollow platen roller as the roller.

[0007]

In order to achieve the above-mentioned object, the present invention provides a facsimile apparatus in which a hollow platen roller, a cam shaft which penetrates the hollow platen roller and is rotatably disposed, and A cam attached to at least one end of the cam shaft outside the hollow platen roller, and a read head and a recording head or recording paper arranged to selectively contact the outer surface of the hollow platen roller by the operation of the cam. A facsimile machine is adopted which is characterized by having a pressing means.

Further, in the case of using an ink jet or the like for recording at a position apart from the original as the writing head, the recording head is fixed and recording paper pressing means (for example, pressing bar) is used instead of the recording head. Alternatively, a facsimile machine configured to selectively move the pressing roll) is adopted.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will now be described with reference to the accompanying drawings.

First, reference is made to FIG. 1 showing a perspective view of a facsimile apparatus of the present invention, and FIG. 2 showing a schematic sectional view of the facsimile apparatus. The facsimile device 10 has a plate-shaped frame 12, and the frame 12 alone serves as a motor 14, a speed reducer 16, and a hollow platen roller 4 which will be described in detail below.
0, a read head 60, a recording head 50, and other main parts of the facsimile apparatus of the present invention. Frame 1
The motor 14 supported by 2 is a reversible motor that performs both forward rotation and reverse rotation. The power from the motor 14 is simultaneously transmitted to the hollow platen roller drive gear 18 and the cam shaft drive gear 20 via the speed reducer 16 including a gear train (see FIG. 2). In addition, the illustrated configuration is only an example,
Other configurations are possible. For example, the speed reducer 16
Power may be transmitted to a common shaft having two one-way clutches, and power may be transmitted to the two one-way clutches via the common shaft. In addition, the operation description below is
The description of the operation performed in connection with the former configuration and taking the latter configuration will be omitted because it can be easily understood by those skilled in the art.

The gear 18 is connected to the hollow platen roller 40 via a one-way clutch 22. When the motor 14 rotates in the normal direction, the power from the motor 14 is transmitted to the hollow platen roller 40, and the hollow platen roller 40 is driven. 40
Rotate in the positive direction. On the other hand, the gear 20 is connected to the cam shaft 26 via the one-way clutch 24, and when the motor is rotated in the reverse direction, the power from the motor 14 is transmitted to the cam shaft 26 to rotate the cam shaft 26 in the opposite direction. .. In this way, either the hollow platen roller 40 or the cam shaft 26 is rotated depending on the rotation direction of the motor 14.

Next, referring to FIG. 3, which is a partial detailed sectional view of FIG. 2, the hollow platen roller 40 is rotatably supported by the frame 12 via a flange bush 72, and the roller core metal 42 and The rubber 44 is attached to the surface of the roller core metal 42. In addition, the recording head 5
0 and the read head 60 are movable in the radial direction with respect to the hollow platen roller 40 via a bush 74 and pressure springs 78 and 76 (only one of which is shown in FIG. 3) arranged at both ends. Installed.

The recording head 50 is normally pressed inward by a pressure spring 78 so as to come into contact (press contact) with the hollow platen roller 40. For example, the recording head main body 52 such as a thermal printing head and the recording head 50. And a plate 54 attached to the outside of the head main body 52. The plate 54 has on both ends portions 56 and 58 forming cam followers for performing a cam action with cams 30 and 32 described later.
(See FIGS. 1 and 2).

On the other hand, the read head 60 is normally urged inward by a pressure spring 76 so that it also contacts the hollow platen 40. For example, the read head main body 62 such as a contact image sensor and the read head. It is composed of a plate (L-shaped flange) 64 attached to the outside of the main body 62. This plate 64 also has cams 30 and 32, which will be described later, and portions 66 and 68 forming cam followers for performing a cam action at both ends (see FIGS. 1 and 2).

At both ends of the cam shaft 26 arranged so as to penetrate the hollow platen roller 40 (one end is between the end of the hollow platen roller and the gear 20 and the other end is outside the end of the hollow platen roller). ) Cams 30 and 32 are mounted. The shapes of the cams 30 and 32 are as shown in FIG.
Circular arc portions 30a and 3 provided at two locations on the outer circumference of the disc so as to project to the outside at intervals of, for example, about 120 °.
It has a shape having 0b, 32a and 32b (see also FIGS. 4 and 5).

With such a structure, the cam 3 is driven by the motor 14 via the gear 20 and the one-way clutch 24.
When 0 and 32 are rotated, arc portions 30a, 32
a and / or 30b, 32b are cam follower portions 56, 5 of the recording head 50 and / or the read head 60.
8 and 66, 68 are pushed outwardly against the force of the pressure springs 76, 78, thereby separating the recording head 50 and / or the reading head 60 from the hollow platen roller 40.

Next, referring to FIG. 4 for explaining the rotation of the hollow platen roller or the rotation of the cam based on the action of the cam and the rotation direction of the motor, the rotation of the motor is indicated by an arrow A.
In the positive direction, for example, in the clockwise direction, the power of the motor is applied to the hollow platen roller 40 (not shown in FIG. 4) through the one-way clutch 22 (not shown in FIG. 4). However, since the cam shaft is connected through another one-way clutch 24, the cam shaft is not rotated and the position is maintained as it is. On the contrary, if the rotation of the motor is in the opposite direction, for example, the counterclockwise direction as shown by the arrow B, the power of the motor is transmitted to the cam 30 via the other one-way clutch 24, and the arc is generated. Portions 30a, 32a or 30b, 32b push up the respective cam followers 56, 58 or 66, 68 of the recording head body 50 or the read head body 60 to move one or both of them away from the hollow platen roller.

Next, FIG. 5 (FIG. 5a, FIG. 5b, FIG. 5c, FIG. 5d, for explaining the selection of the cam position and the control mode).
And FIG. 5e). FIG. 5a shows a group 80 of cams 30 and limit switches. The limit switch group 80 includes, for example, three switches LS1, LS2,
It is composed of LS3 and acts, for example, with four groups of three depressions 82 (b1, b2, b3) provided on the surface of the cam, and the mode shown in the following table is taken depending on the ON / OFF state of these limit switches. Is configured.

Table LS1 LS2 LS3 Standby Mode (Position 1) OFF OFF ON Transmission Mode (Position 2) OFF ON ON OFF Copy Mode (Position 3) OFF ON ON Reception Mode (Position 4) ON OFF OFF OFF

5b, 5c, 5d and 5e respectively show the position of the cam when the above-mentioned mode is set. In the standby mode, the recording head 50 and the reading head 60 are separated from the hollow platen roller, and this mode is used when the facsimile apparatus is not used, or during storage or transportation. In transmit mode, read head 6
Only 0 is in contact with the hollow platen roller, and in the copy mode, the recording head 50 and the reading head 60 are
Both are in contact with the hollow platen roller, and only the recording head 50 is in contact with the hollow platen roller in the reception mode.

Next, referring to FIG. 6, the mode setting and data processing by the reverse rotation and the forward rotation of the motor will be described. The rotational driving force is simultaneously transmitted to both the one-way clutches 22 and 24 by the motor 14 via the reduction gear device 16. Initially, the rotation of the motor is set to reverse so that the camshaft is driven via one one-way clutch 24 and the group of limit switches causes one of the four positions of the above-mentioned cam to be commanded. Once selected, the cam will stop at that position. As a result, one of the control modes described above (for example, the transmission mode) is selected.

Next, the motor is set to the normal rotation, the rotational driving force of the motor drives the hollow platen roller via the other one-way clutch 22, and data processing (for example, reading) is performed.

Next, another embodiment of the present invention will be described with reference to FIG. The embodiment of FIG. 7 uses an ink jet type or wire dot type recording head 90 for recording in a state of being fixed apart from the hollow platen roller, instead of the thermal printing head that is pressed against the hollow platen roller during recording. Indicate the case. In this case, recording paper pressing means 92 for pressing the recording paper against the hollow platen roller 40 is provided so as to move with respect to the hollow platen roller. That is, the recording sheet pressing means 92 is configured to take the position based on the various modes described above, instead of the recording head 50.

FIGS. 8a and 8b show a concrete example of the recording sheet pressing means, and a bar 92a having a semicircular cross section.
A rubber roller or a plastic roller 92b can be used.

[0025]

As described in detail above, the present invention is
A facsimile machine is constructed using one motor and one roller, in which case the roller is a hollow platen roller,
Since the cam shaft for controlling the positions of the recording head and the reading head is provided in the hollow platen roller, it is possible to reduce the size and weight of the facsimile apparatus.

[Brief description of drawings]

FIG. 1 is a perspective view showing a main part of a facsimile apparatus of the present invention.

FIG. 2 is a schematic sectional view of a facsimile device.

FIG. 3 is a detailed cross-sectional view of a portion of FIG.

FIG. 4 is a schematic diagram for explaining the rotation of the hollow platen roller or the rotation of the cam based on the action of the cam and the rotation direction of the motor.

5a, 5b, 5c, 5d, 5e, FIG.
It is a schematic diagram for explaining selection of a cam position and a control mode.

FIG. 6 is a schematic diagram for explaining mode setting and data processing by reverse rotation and forward rotation of a motor.

FIG. 7 is a schematic side view showing another embodiment of the present invention.

8A and 8B are schematic perspective views showing a pressing bar, a rubber roller, and a plastic roller, which are recording sheet pressing means, respectively.

[Explanation of symbols]

 10 Facsimile device 12 Frame 14 Motor 16 Speed reducer 18, 20 Gear 22, 24 One way clutch 26 Cam shaft 30, 32 Cam 40 Hollow platen roller 50 Recording head 60 Reading head 76, 78 Pressure spring 80 Limit switch 90 Recording head 92 Recording Paper holding means

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] October 9, 1992

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is a perspective view showing a main part of a facsimile apparatus of the present invention.

FIG. 2 is a schematic sectional view of the facsimile machine of FIG.

FIG. 3 is a detailed cross-sectional view of a portion of FIG.

FIG. 4 is a schematic diagram for explaining the rotation of the hollow platen roller or the rotation of the cam based on the action of the cam and the rotation direction of the motor.

FIG. 5 is a schematic diagram for explaining selection of a cam position and a control mode.

FIG. 6 is a schematic diagram for explaining selection of a cam position and a control mode.

FIG. 7 is a schematic diagram for explaining selection of a cam position and a control mode.

FIG. 8 is a schematic diagram for explaining selection of a cam position and a control mode.

FIG. 9 is a schematic diagram for explaining selection of a cam position and a control mode.

FIG. 10 is a schematic diagram for explaining mode setting and data processing by reverse rotation and forward rotation of a motor.

FIG. 11 is a schematic side view showing another embodiment of the present invention.

FIG. 12 is a schematic perspective view showing a pressing bar, a rubber roller, and a plastic roller, which are recording sheet pressing means.

FIG. 13 is a schematic perspective view showing a pressing bar as a recording paper pressing unit, a rubber roller, and a plastic roller, respectively.

[Explanation of Codes] 10 Facsimile device 12 Frame 14 Motor 16 Speed reducer 18, 20 Gear 22, 24 One-way clutch 26 Cam shaft 30, 32 Cam 40 Hollow platen roller 50 Recording head 60 Read head 76, 78 Pressure spring 80 Limit switch 90 recording head 92 recording sheet pressing means

[Procedure 3]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

[Figure 1]

[Fig. 2]

[Figure 3]

[Figure 4]

[Figure 5]

[Figure 6]

[Figure 7]

[Figure 8]

[Figure 9]

FIG. 11

[Fig. 13]

[Figure 10]

[Fig. 12]

Claims (3)

[Claims] 1. In a facsimile apparatus, a hollow platen roller, a cam shaft penetrating the hollow platen roller and rotatably arranged, and attached to at least one end of the cam shaft outside the hollow platen roller. A facsimile machine comprising: a cam; and a reading head and a recording head or a recording sheet pressing means arranged so as to selectively contact the outer surface of the hollow platen roller by the operation of the cam. 2. The facsimile apparatus according to claim 1, wherein the recording head is fixed to a hollow platen roller so as to be separated therefrom, and the recording sheet pressing means is selectively brought into contact with the hollow platen roller. A facsimile machine characterized by being arranged. 3. The facsimile apparatus according to claim 2, wherein the recording paper pressing means is a pressing bar or a pressing roll.