JPH1110966A - Apparatus for driving facsimile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a driving apparatus for a facsimile which can draw out a recording paper, cut the paper and take in the paper in a simple constitution. SOLUTION: When a sun gear 62 rotates in a forward direction C1, a first and a second planet gears 63, 64 revolve in a first revolution direction C3. The first planet gear 63 is meshed with a first platen-driving gear 65, and the second planet gear 64 is hindered by an obstructing means from revolving in the first revolution direction C3. On the other hand, when the sun gear 62 rotates in a rearward direction C2, the first planet gear 63 and the second planet gear 64 are meshed with a cutting blade-driving gear 67 and a second platen-driving gear 66 respectively. Accordingly, a platen roller 75 can be rotated in a direction corresponding to the forward direction C1 when the sun gear 62 rotates in the forward direction C1, and a cutting blade 82 is driven thereby rotating the platen roller 75 in a direction corresponding to the rearward direction C2 when the sun gear 62 rotates in the rearward direction C2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile driving apparatus, and more particularly, to a method for pulling out a recording sheet to a predetermined cutting position, cutting the recording sheet, and then pulling the recording sheet and disposing the recording sheet at a predetermined printing start position. The present invention relates to a facsimile driving device.

[0002]

2. Description of the Related Art A facsimile of a type using a recording paper wound in a roll shape is provided with a conveying means for conveying the recording paper, such as a platen roller, and a cutting means for cutting the recording paper. In such a facsimile, a recording paper pull-out operation for printing while rewinding the recording paper in a direction facing a predetermined cutting position, a cutting operation for cutting the recording paper at a predetermined cutting position, and a recording paper from the cutting position. The recording paper retracting operation for retracting and arranging the recording paper at a predetermined printing start position is performed in this order. The facsimile transporting means and cutting means are driven in accordance with a recording paper withdrawing mode for performing the recording paper withdrawing operation, a cutting mode for performing the cutting operation, and a drawing mode for performing the recording paper withdrawing operation. As the configuration for driving the transporting means and the cutting means in accordance with each of the modes, a configuration in which the transmission path of the driving force by one motor is switched using a planetary gear, and a dedicated motor provided for the transporting means and the cutting means are provided. Drive. The former configuration using one motor and planetary gears has the effect of reducing the number of motors and reducing the manufacturing cost of the facsimile, as compared with the latter configuration using dedicated motors. Can be.

In a configuration using one motor and a planetary gear, the arrangement position of the planetary gears is switched according to each of the above modes. As means for switching the arrangement position of the planetary gears, conventionally, there are a configuration using a switching gear and a configuration using an electromagnetic solenoid.

FIG. 8 shows a driving device 1 according to a first prior art.
FIG. In this conventional technique, a driving force from a stepping motor (not shown) is transmitted to a movable blade 26 and a platen roller (not shown) via two planetary gears 9 and 11.

More specifically, the motor gear 2 has a drive shaft of the stepping motor which is press-fitted and supported. The gears 3 and 4 respectively mesh with the motor gear 2, and when the motor gear 2 rotates, the rotational force is transmitted to the first sun gear 5 fixed coaxially with the gear 3. Motor gear 2
Rotates, the rotational force of the other gears 4 and 6
Through the second sun gear 7.

[0006] First and second planetary arms 8 and 10 each having a substantially L-shape are rotatably supported on the rotating shafts of the first and second sun gears 5 and 7, respectively. First and second planetary gears 9 and 11 are pivotally supported at one ends 8a and 10a of the arms 8 and 10, respectively.

When the motor gear 2 rotates in the direction indicated by the arrow A1, the first sun gear 5 rotates in the direction indicated by the arrow A2 which is opposite to the direction indicated by the arrow A1. By the rotation of the first sun gear 5 in the direction of the arrow A2, the first planetary gear 9 revolves in the direction of the arrow A2. When the first planetary gear 9 revolves in the direction of the arrow A2, the other end 8b of the first planetary arm 8 that is angularly displaced together with the first planetary gear 9 is moved by the stopper 1
Blocked by abutting 2.

The rotation of the motor gear 2 in the direction of arrow A1 causes the second sun gear 7 to rotate in the direction of arrow A2. The second planetary gear 11 revolves in the direction of the arrow A2 and meshes with the first switching gear 13, whereby the first switching gear 13 and the second switching gear 14 meshing with the first switching gear 13 Rotates. The first switching gear 13 is integrally provided with a first stopper 16 for abutting / separating from one end 15a of a first swing arm 15 described later to angularly displace the first swing arm 15. Can be The second switching gear 14
A second stopper 18 which abuts one end 17a of a second swing arm 17 to be described later;
And a third stopper 19 which comes into contact with / separates from the other end portion 10b of the vehicle. As described above, the motor gear 2 rotates in the direction of arrow A1, and the second planetary gear 1
When 1 meshes with the first switching gear 13, the first and second switching gears 13 and 14 rotate according to the rotation angle of the motor gear 2. The first to third stoppers 16, 1
Adjustment of the arrangement positions of 8, 19 is performed by setting the rotation angle of the motor gear 2, that is, the number of steps of the stepping motor according to each of the modes.

In FIG. 8, first and second switching gears 13,
14 shows a switching mode in which the rotating mechanism 14 rotates. When the motor gear 2 is rotated in the direction indicated by the arrow A2 in a state where the first to third stoppers 16, 18, and 19 are arranged as shown in FIG. 8, the first and second planetary gears 9 are rotated. , 11 revolve in the direction of arrow A1.

FIG. 9 is a block diagram of a first prior art showing a state of a recording paper withdrawal mode. When the motor gear 2 is rotated in the direction of the arrow A2 as described above, the second planetary gear 11 revolves in the direction indicated by the arrow A1, and the second planetary gear 11 is disposed in the revolving path of the second planetary gear 11. It meshes with one platen drive gear 20. The first platen drive gear 20 is connected via a gear 21 to a platen gear 22 which is pressed into and fixed to a shaft of a platen roller. In a state where the first platen drive gear 20 and the second planetary gear 11 are meshed,
The rotation force of the stepping motor is controlled by the platen gear 22.
Is rotated in the A1 direction. As a result, the platen roller rotates forward.

Although the first planetary gear 9 revolves in the direction of the arrow A1 due to the rotation of the motor gear 2 in the direction of the arrow A2, the other end of the first planetary arm 8 revolves with the first planetary gear 9. The other end 17b of the second swing arm 17 abuts on the second swing arm 8b, and the revolution in the direction of the arrow A1 is prevented. That is, the first and second switching gears 13,
In the state where the first to third stoppers 16, 18, and 19 of FIG. 14 are arranged as shown in FIGS. 8 and 9, when the motor gear 2 is rotated in the direction of the arrow A <b> 2, the first planetary gear 9 is rotated. Is an arrow A1 at a position where it does not mesh with the cutting blade drive gear 23.
And the second planetary gear 11 is moved to the first
It meshes with the platen drive gear 20. Thus, in the recording paper pull-out mode, the platen roller rotates forward to convey the recording paper in the direction indicated by arrow A3.

FIG. 10 is a configuration diagram of a first prior art showing a state of a cutting mode. Switching from the recording paper withdrawal mode to the cutting mode is performed by rotating the motor gear 2 in the direction of arrow A1 so that the second planetary gear 11 meshes with the first switching gear 13 as shown in FIG. 2 switching gear 13,
14 is rotated by a predetermined angle. When the motor gear 2 is rotated in the direction of the arrow A2 in a state where the first to third stoppers 16, 18, and 19 are arranged as shown in FIG. 10, the first planetary gear 9 becomes the first planetary arm. A1 with 8
Revolves in the direction. At this time, the second swing arm 17 is moved from the state in which the other end 17b is in contact with the arc region 18a of the second stopper 18 (see FIGS. 8 and 9) by the rotation of the second switching gear 14 (see FIGS. 8 and 9). The state is shifted to the state of contact with. Accordingly, when the first planetary arm 8 revolves in the direction of arrow A1, the other end 17b of the second swing arm 17 is pushed upward, whereby the arrow A of the first planetary arm 8 is moved.
The revolution in one direction is allowed, and the first planetary gear 9 meshes with the cutting blade drive gear 23 provided in the revolution path of the first planetary gear 9.

When the motor gear 2 rotates in the direction of the arrow A2, the second planetary gear 11 attempts to revolve in the direction of the arrow A1, but the other end of the second planetary arm 10 revolves with the second planetary gear 11. The portion 10b comes into contact with the third stopper 19, and the revolution in the A1 direction is prevented. Therefore, in the state shown in FIG. 10, the second planetary gear 11 is not meshed with the first platen drive gear 20, and the first planetary gear 9 is meshed with the cutting blade drive gear 23. The rotation of the cutting blade drive gear 23
Through a gear 24 fixed coaxially to the crank gear 25
To rotate. The movable blade 26 is driven to move up and down in the direction indicated by the arrow A4 every time the crank gear 25 makes one rotation. A fixed blade 27 is provided below the movable blade 26, and the recording paper is disposed between the fixed blade 27 and the movable blade 26.
5, the recording paper is cut by the fixed blade 27 and the movable blade 26. After the cutting of the recording paper, the mode shifts to the recording paper retraction mode.

FIG. 11 is a configuration diagram of a first prior art showing a state of a recording paper pull-in mode. The switching from the cutting mode to the retracting mode is performed by rotating the motor gear 2 in the direction of the arrow A1 as described above, thereby rotating the first and second switching gears 13 and 14 by a predetermined angle. This is performed by disposing the third stoppers 16, 18, and 19 as shown in FIG. In this state, one end 15 a of the first swing arm 15 is pressed upward by the first stopper 16.

At the other end of the first swing arm 15, a second platen drive gear 28 is provided. Further, the other end of the first swing arm 15 is urged upward by the spring force of the spring 29, and as described above, the one end 1
5a is not pressed upward by the first stopper 16, the gear 28 is the first platen drive gear 20.
Is maintained so as not to mesh with. When the first swing arm 15 is angularly displaced in the direction of the arrow A1 and the second platen drive gear 28 and the first platen drive gear 20 are in mesh with each other, the motor gear 2 is rotated in the direction of the arrow A2. Planetary gear 11
Revolves in the direction of arrow A1, and the second platen drive gear 2
8 meshes. Also, the first planetary gear 9 has one end 17a of the second swing arm 17 abutting again on the arc region 18a of the second stopper, whereby the arrow A of the first planetary arm 8 is moved.
Revolution in one direction is prevented, and it is supported at a position where it does not mesh with the cutting blade drive gear 23.

Thus, in the recording paper pull-in mode,
Compared to the above-described recording paper withdrawal mode, in the recording paper withdrawal mode, the second planetary gear 11 is
0 was engaged directly, whereas the second
Since the planetary gear 11 is connected to the first platen drive gear 20 via the second platen drive gear 28, the platen gear 22 rotates in the direction of arrow A2. As a result, the platen roller rotates in the reverse direction, and the recording paper is conveyed in the direction indicated by arrow A5 opposite to the direction of arrow A3.

As described above, in the first prior art, the recording paper drawing mode for rotating the platen forward, the cutting mode for moving the movable blade 28 up and down, and the recording paper drawing mode for rotating the platen reversely are used. By rotating the first and second switching gears 13 and 14, the first and second switching gears 13 and 14 are rotated.
The positions of the planetary arms 8 and 10 and the first and second swing arms 15 and 17 are controlled to switch the gears that mesh with the first and second planetary gears 9 and 11.

FIG. 12 is a block diagram showing a second prior art, which is disclosed in Japanese Patent Application Laid-Open No. Hei 5-221078. In this prior art, an electromagnetic solenoid 31 and a stopper 32 are used as means for switching the arrangement positions of the first and second planetary gears 34, 35.

The sun gear 33 is press-fitted with a drive shaft of a motor (not shown). The rotation shaft of the sun gear 33 has one end 36 of each of the first and second planetary arms 36 and 37.
a and 37a are respectively supported. The first and second planetary gears 3, 37 are provided with the first and second planetary gears 3.
4, 35 mesh with the sun gear 33, and arrows B1, B
The shaft is supported so that it can revolve in two directions. The first planetary arm 36 has a protruding portion 36b protruding in a direction away from one end 36a of the first planetary arm from a portion supporting the rotation shaft of the first planetary gear 34.

The stopper 32 is pin-connected to the facsimile frame in such a manner that it can be angularly displaced in the directions indicated by arrows B3 and B4. At one end of the stopper 32,
The plunger of the electromagnetic solenoid 31 is fixed, and an upper claw portion 38 and a lower claw portion 39 are provided at the other end.

A first platen drive gear 40 is provided on the revolving path of the second planetary gear 35 on the upstream side in the direction of the arrow B1. A pulley (not shown) is coaxially fixed to the first platen drive gear 40, and the first belt 4
1 is wound. The first belt 41 connects the first platen drive gear 40 and a platen roller coaxially fixed to the platen drive pulley 42. A thermal head 43 is provided above the platen roller.

FIG. 12A is a configuration diagram of a second prior art showing a state of a recording paper pull-out mode. Sun gear 33
Rotates in the direction of arrow B2, the second planetary gear 35 revolves in the direction of arrow B2 and meshes with the first platen drive gear 40. Although the first planetary gear 34 tries to revolve in the direction of arrow B2 due to the rotation of the sun gear 33,
In the recording paper withdrawing mode, the electromagnetic solenoid 31 is excited, the stopper 32 is angularly displaced in the direction indicated by the arrow B3, and the projection 36b of the first planetary arm 36 is moved to the upper claw 3
8 and the lower claw portion 39, thereby preventing the first planetary gear 34 from revolving in the B2 direction. That is, in the recording paper pull-out mode, the second planetary gear 35 and the first
When the platen drive gear 40 meshes, the rotational force of the motor rotates the platen drive pulley 42 in the direction of arrow B2 and conveys the recording paper in the pull-out direction.

FIG. 12 (2) is a configuration diagram of a second prior art showing a state of a cutting mode. Switching from the recording paper withdrawing mode to the cutting mode is performed by demagnetizing the electromagnetic solenoid 31 and angularly displacing the stopper 32 in the direction of arrow B4, thereby rotating the sun gear 33 in the direction of arrow B2.
This is performed by allowing the planetary gear 34 to revolve in the direction of arrow B2. In the revolving path of the second planetary gear 35, a cutting blade drive gear is provided downstream of the second planetary gear 35 in the direction of the arrow B2. A cutting blade drive pulley 44 is coaxially fixed to the cutting blade drive gear. The cutting blade drive pulley 44 is connected to a pulley 46 by a second belt 45, and the pulley 46 is coaxially fixed to a rotation axis of a rotary blade 47. Therefore, while the sun gear 33 is rotating in the direction of the arrow B2, as described above, the electromagnetic solenoid 31 is rotated.
Is demagnetized to release the restrained state of the first planetary arm 36, the first planetary gear 34 is angularly displaced in the direction of arrow B2 to
It meshes with the platen gear 40. As a result, the rotational force of the motor is transmitted to the rotary blade 47 to cut the recording paper. In this cutting mode, the second planetary gear 35 and the first platen drive gear 40 are kept in mesh with each other by the second
After the planetary gear 35 and the first platen driving gear 40 mesh with each other, the electromagnetic solenoid 31 is excited to stop the stopper 3.
2 is angularly displaced in the direction of arrow B3, and the first planetary arm 36 is restrained by bringing the protruding portion 36b into contact with the lower claw portion 39.

In this prior art, the second planetary gear 35
, And the arrow B1 is larger than the second planetary gear 35
A reading drive gear 48 is provided on the downstream side in the direction. When the sun gear 33 is rotated in the direction of arrow B1, the first and second
The planetary gears 34 and 35 revolve in the direction of arrow B <b> 1, and the first planetary gear 34 meshes with a second platen drive gear 49 which meshes with the first platen drive gear 40. The second planetary gear 35 meshes with the reading drive gear 48.

FIG. 12C shows the state of the copy mode.
The rotation of the sun gear 33 in the direction of the arrow B <b> 1 causes the first planetary gear 34 to mesh with the second platen drive gear 49. Therefore, the platen roller rotates in the direction in which the recording paper is transported, and the transport roller (not shown) that transports the document is rotated by the engagement of the second planetary gear 35 and the reading drive gear 48. In this copying mode, the first planetary gear 34
In order to maintain the state in which the second planetary gear 49 and the second platen drive gear 49 are securely engaged with each other, the electromagnetic solenoid 31 is excited to angularly displace the stopper 32 in the direction indicated by the arrow B3. The 36 protruding portions 36b are pressed. Thus, it is possible to eliminate the problem that the first planetary arm 36 undesirably revolves in the direction of arrow B2 due to the weight of the first planetary arm 36 and the first planetary gear 34.

As described above, in the second prior art, the revolving operation of the first planetary gear 34 is restrained or released by using the electromagnetic solenoid 31 and the stopper 32 in accordance with each of the modes described above, and the platen roller and the rotation are rotated. Each of the blades 47 is driven.

As another prior art for adjusting the arrangement position of the planetary gears using an electromagnetic solenoid, a third prior art is disclosed in Japanese Patent Application Laid-Open No. Hei 6-164815. In the third related art, a plurality of notches are provided at one end of the planetary arm connecting the sun gear and the planetary gear on the sun gear side. The plurality of cutouts are provided corresponding to the positions of gears to be meshed with the planetary gears, such as a cutting blade drive gear and a platen drive gear. The rotation of the sun gear causes the planetary gear to revolve. When the planetary gear meshes with the gear to be meshed, a claw that is angularly displaced by the electromagnetic solenoid fits into the notch, thereby preventing the planetary gear from revolving. In this conventional technique, the position of the planetary arm is adjusted by exciting / demagnetizing the electromagnetic solenoid in accordance with each mode, and the cutting blade and the platen roller are operated via the sun gear and the planetary gear.

[0028]

The above-described switching gear 1
In the first prior art using 3,14, the first and second
Since it is necessary to hold the planetary gears 9 and 11 at a position where they do not mesh with the first platen drive gear 20 and the cutting blade drive gear 23 against the rotational torque of the first and second sun gears 5 and 7, the recording is performed. Since the second platen drive gear 28 needs to be interposed in the revolving path of the second planetary gear 11 in the paper retraction mode, the first and second swing arms 1
5, 17 must be provided. Thereby, the driving device 1
However, there is a problem that the cost of parts increases because the size and the number of parts increase.

The operation of switching the positions of the first and second planetary gears 9 and 11 in accordance with each mode is performed by rotating the motor gear 2 in the direction of the arrow A1 and by switching the first and second switching gears 13 and 14 must be rotated by a predetermined angle, and the above operation is troublesome. For facsimile,
The communication period between the reception of one print content and the reception of the next one print content is limited to 1.5 seconds to 2.0 seconds, and a communication error occurs if the time limit is exceeded. . Therefore, in order to prevent the probability of a communication error from increasing, the first conventional technique requires a motor capable of high-speed operation, and has a problem that component costs for the motor are required.

In the second prior art configuration using the electromagnetic solenoid 31, the first planetary gear 34 according to each mode is provided.
Into a state in which the first platen drive gear 40 and the cutting blade drive gear are meshed with each other, and the state in which the first planetary gear 34 is not meshed with the first platen drive gear 40 and the cutting blade drive gear. An electromagnetic solenoid 31 and a stop 32 are required to maintain. Therefore, it is necessary to secure an arrangement space for the electromagnetic solenoid 31 and the stopper 32, and the drive device becomes large,
In addition, there is a problem that the cost of parts for the electromagnetic solenoid 31 and the stopper 32 is increased. The third prior art described above also has a problem that, like the second prior art, a space for arranging the electromagnetic solenoid and the claw and a component cost for the electromagnetic solenoid and the claw are required.

An object of the present invention is to enable a series of operations including a recording paper pull-out operation, a cutting operation, and a recording paper pull-in operation to be suitably performed, and to reduce the size and the cost of parts with a simple configuration. It is an object of the present invention to provide a facsimile driving device capable of performing the following.

[0032]

SUMMARY OF THE INVENTION The present invention provides a sun gear rotatably driven in both forward and reverse directions, and a first revolving direction corresponding to the forward direction and the sun gear engaged with the sun gear. First and second planetary gears that can individually revolve in a second revolving direction corresponding to the direction, and in the revolving path of the first and second planetary gears, downstream of the first planetary gear in the first revolving direction. And a platen drive gear provided upstream of the second planetary gear in the first revolution direction, and a second rotation direction downstream of the first planetary gear in the revolution path of the first planetary gear. A cutting blade drive gear provided upstream of the second planetary gear in the second revolution direction; and a cutting blade drive gear downstream of the second planetary gear in the first revolution direction and upstream of the cutting blade drive gear in the first revolution direction. At a predetermined position, in the first revolution direction of the second planetary gear A facsimile drive comprising: a blocking means for preventing displacement; a platen roller that is bidirectionally driven to rotate by rotation of a platen drive gear; and a cutting blade that performs a cutting operation by rotation of the cutting blade drive gear. Device.

According to the present invention, when the sun gear is driven to rotate in the forward direction, the first and second planetary gears revolve in the first orbital direction, and the first planetary gear meshes with the platen drive gear, Further, the second planetary gear is prevented from being displaced in the first revolution direction at a predetermined position on the upstream side in the first revolution direction with respect to the cutting blade drive gear.

Conversely, when the sun gear is driven to rotate in the reverse direction, the first and second planetary gears revolve in the second orbital direction, the first planetary gear meshes with the cutting blade drive gear, and
The planet gear meshes with the platen drive gear.

In the facsimile recording paper pull-out mode described in connection with the prior art described above, for example, when the sun gear is rotated in the forward direction by a motor, the first planetary gear meshes with the platen drive gear, and the motor rotates. , The platen roller is rotationally driven in a direction corresponding to the forward rotation of the sun gear. on the other hand,
In the cutting blade drive gear, at the predetermined position, the second planetary gear is prevented from being displaced in the first revolving direction, in other words, from being displaced in the direction approaching the cutting blade drive gear, by a blocking means. Accordingly, the cutting blade drive gear does not mesh with the second planetary gear and is not driven to rotate. Therefore, the recording paper can be pulled out by rotating only the platen roller.

In the facsimile recording paper retracting mode and the cutting mode, when the sun gear is rotated in the reverse direction by the motor, the second planetary gear meshes with the platen driving gear, and the first planetary gear engages with the cutting blade driving gear. The gears mesh. In this state, the cutting blade drive gear is driven to rotate, and the cutting blade performs a cutting operation. The platen roller is driven to rotate in a rotation direction corresponding to the rotation of the sun gear in the reverse direction. In other words, it is driven to rotate in the direction opposite to the direction in which the recording paper is pulled out in the recording paper pull-out mode, whereby the recording paper can be pulled in.

As described above, according to the configuration of the present invention, it is possible to perform the recording paper pull-out operation, the cutting operation, and the recording paper retraction operation in accordance with the rotation direction of the sun gear. That is, it is necessary to hold the arrangement positions of the first and second planetary gears at a position where the first and second planetary gears do not mesh with the platen drive gear and the cutting blade drive gear against the rotational torque of the sun gear. In comparison with the above, there is no need to provide a part for holding the first and second planetary gears in a predetermined position. As a result, the number of parts can be reduced, the size of the apparatus can be reduced, and the cost of parts and manufacturing can be reduced.

Further, the present invention is characterized in that the platen driving gear and the cutting blade driving gear are arranged close to each other in the circumferential direction with the first planetary gear interposed therebetween.

According to the present invention, since the platen driving gear and the cutting blade driving gear are arranged close to each other in the circumferential direction of the sun gear, the cutting blade driving gear is shifted from the position where the first planetary gear meshes with the platen driving gear. The first position up to the position where the first
The distance along the orbital direction can be made as small as possible. As a result, the period required to switch from the recording paper withdrawing mode to the cutting mode can be made as short as possible, and the probability of a communication error can be reduced.

Further, in the present invention, the blocking means is arranged such that a distance between the blocking means and the platen driving gear in the second revolving direction is larger than a distance between the platen driving gear and the cutting blade driving gear in the second revolving direction. It is characterized by being arranged in.

According to the present invention, during the period required for the displacement of the first planetary gear from the position at which the first planetary gear meshes with the platen drive gear to the position at which it meshes with the cutting blade drive gear, the second planetary gear is moved from the predetermined position. It is shorter than the period required for the displacement to the position where it meshes with the platen drive gear. In other words, when the rotation direction of the sun gear switches from the forward direction to the reverse direction when switching from the recording paper withdrawing mode to the cutting mode and the recording paper withdrawing mode, the first planetary gear rotates with the second planetary gear rotating. It meshes with the cutting blade drive gear faster than it meshes with the drive gear. Therefore, the rotation operation of the cutting blade drive gear, that is, the switching operation, can be started in a state where the platen drive gear is not rotationally driven. In this manner, the recording paper can be cut by the cutting blade in a state where the recording paper is stopped, so that the cutting edge of the cutting blade is chipped and that the surface of the recording paper is damaged in the recording paper conveyance direction. Can be eliminated.

Further, according to the present invention, within a period from when the cutting blade passes a predetermined cutting position to when the cutting blade returns to the cutting position again,
The second planetary gear is meshed with the platen drive gear.

According to the present invention, the second planetary gear meshes with the platen drive gear within a period after the recording blade is cut by the cutting blade and before the cutting blade returns to the cutting position where the recording paper has been cut. Then, the recording paper pull-in operation is started. Therefore, the leading end of the recording paper cut by the cutting blade,
It is possible to eliminate such a problem that the recording sheet is brought into sliding contact with and damaged by the cutting blade returning to the cutting position after cutting the recording paper.

Further, the present invention is characterized in that each time a predetermined recording operation is completed, the first planetary gear is brought into a state of meshing with the platen driving gear.

According to the present invention, the sun gear is driven to rotate in the forward direction each time a predetermined recording operation, that is, a series of operations including a recording paper pull-out operation, a cutting operation, and a recording paper pull-back operation, is completed. The planetary gear and the platen drive gear are kept engaged. As a result, when the next recording operation is started, the rotational driving of the sun gear is started at the same time as the rotational force is transmitted to the platen driving gear and the drawing operation of the recording paper is started. A margin between the print position and the print position on the recording paper surface can be set to a predetermined size, and the communication period for receiving the first sheet can be made as short as possible.

[0046]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a simplified block diagram showing a driving device 60 according to an embodiment of the present invention. The driving device 60 is provided inside a facsimile that uses roll-shaped recording paper, and in the recording paper pull-out mode, the recording paper 6
1 is pulled out, and the recording paper 61 is cut in the cutting mode.
This is a device for pulling in the recording paper 61 in the recording paper pull-in mode, that is, transporting the recording paper 61 in a direction opposite to the direction in which the recording paper 61 was transported in the recording paper pull-out mode.

The driving device 60 includes a motor (not shown) rotatable in both directions, and a sun driven by the motor in both directions, a forward direction indicated by an arrow C1 and a reverse direction indicated by an arrow C2. A gear 62, first and second planetary gears 63 and 64 meshing with the sun gear 62, respectively;
The first platen drive gear 65 and the cutting blade drive gear 67 arranged in the revolution path of the first planetary gear 63, and the second platen drive gear 66 and the blocking means arranged in the revolution path of the second planetary gear 64. It includes a certain stopper 68 and control means 69 for controlling the rotation operation of the motor.

The sun gear 62 has a drive shaft for the motor,
They are connected via one or more gears (not shown). The first and second planetary arms 70 and 71 are individually and rotatably supported on the rotation shaft of the sun gear 62. Also the first
The first and second planetary gears 63 and 64 are provided on the second and third planetary arms 70 and 71, respectively. First and second
The planetary gears 63 and 64 revolve in the first orbital direction indicated by the arrow C3 by the rotation of the sun gear 62 in the direction of the arrow C1, and rotate by the rotation of the sun gear 62 in the direction of the arrow C2. Revolves in the second orbital direction indicated by C4.

The first platen drive gear 65 is located downstream of the first planetary gear 63 in the direction of the arrow C3, and
It is arranged upstream of the planetary gear 64 in the arrow C3 direction. The first platen drive gear 65 has a coaxially rotating gear 73, which meshes with a platen gear 74. The platen gear 74 is pressed into one axial end of a platen roller 75 around which the recording paper 61 is wound and supported. When the first planetary arm 70 revolves in the direction of arrow C3 together with the first planetary gear 63 by rotation of the sun gear 62 in the direction of arrow C1 and reaches the first position P1, the first planetary gear 63 is driven by the first platen. The gear meshes with the gear 65, and the revolution in the arrow C3 direction is prevented. In this state, the rotational force of the motor is transmitted to the platen gear 74 via the gears 62, 63, 65, and 73, whereby the platen roller 75 moves in the direction corresponding to the arrow C1 direction (in this embodiment, (The direction indicated by the arrow C1 ′).

The second platen drive gear 66 is arranged downstream of the first platen drive gear 65 in the direction of the arrow C3 and upstream of the second planetary gear 64 in the direction of the arrow C3. The second platen drive gear 66 meshes directly with the platen gear 74. When the sun gear 62 is rotationally driven in the direction of the arrow C2 in a state where the second planetary arm 71 is disposed at the second position P2 as shown by a solid line in FIG.
The second planetary arm 71 revolves in the arrow C4 direction together with the second planetary gear 64. Thereby, the second planetary arm 7
When 1 reaches the fourth position P4, the second planetary gear 64 meshes with the second platen drive gear 66. In this state, the rotational force of the motor is transmitted to the platen gear 74 via the gears 62, 64, 66, whereby the platen roller 75 moves in the direction corresponding to the arrow C2 direction (in the present embodiment, the arrow C1). (The direction indicated by the arrow C2 ′ opposite to the direction).

The arrow C1 'of these platen rollers 75,
Due to the rotation in the direction C2 ′, the recording paper 61 is conveyed in the recording paper pull-out direction indicated by the arrow C5 and the recording paper pull-in direction indicated by the arrow C6.

A thermal head 76 is provided above the platen roller 75. The thermal head 76 is connected to a control unit 69 via a connector 77. In the thermal head 76, a plurality of heating elements are linearly arranged in a direction perpendicular to the conveying direction of the recording paper 61 indicated by the arrows C5 and C6 (a direction perpendicular to the plane of FIG. 1).
The heating element is selectively heated in accordance with the drive signal from the connector 77, and the recording paper 61 is colored and printed. As the recording paper 61, a heat-sensitive recording paper including a base paper and a heat-sensitive layer applied on the surface of the base paper is used. In the heat-sensitive layer,
An electron donor and an electron acceptor in the form of solid fine particles are dispersed in a binder while being physically separated from each other. These electron donors and electron acceptors are solid at room temperature and do not develop color when heated alone, but when both are heated and melted at the same time, a rapid ion exchange type electron transfer reaction occurs, causing the opposite coloration. Produces substance.

The cutting blade drive gear 67 includes a first planetary gear 63
Downstream of the arrow C4 direction and the second planetary gear 6
4 is located upstream of the arrow C4 direction. When the first planetary arm 70 revolves in the direction of arrow C4 by rotation of the sun gear 62 in the direction of arrow C2 and reaches the third position P3, the first planetary gear 63 and the cutting blade drive gear 67 mesh with each other. The first platen drive gear 65 and the cutting blade drive gear 67 have a predetermined angle θ1 along the arrow C4 direction from the first position P1 to the third position P3 of the first planetary arm 70. Respectively.
The predetermined angle θ1 is selected to be, for example, 10 °.

When the sun gear 62 is driven to rotate in the direction of arrow C2 by the motor in a state where the first planetary gear 63 and the cutting blade drive gear 67 are engaged with each other, the rotating power is applied to each gear 6.
3, 67, 78, 79 and transmitted to the crank gear 80. One end of a connection link 81 is rotatably connected to the crank gear 80 in a peripheral region different from the central axis of the crank gear 80. One end of a swing link 83 to which a movable blade 82 is fixed is connected to the other end of the connection link 81, and the other end of the swing link 83 is rotatably connected to a fixed link 84. The movable blade 82
Is provided below the fixed blade 89 fixed to the facsimile frame.

A cam 85 is provided integrally with the crank gear 80. The cam 85 is formed by cutting a cylinder into a substantially V shape, and has a circular arc region 86a in the circumferential direction and a cut region 86b connected to the circular arc region 86a. Detector 8
8 is a detecting piece 87 driven along the peripheral surface of the cam 85
Having. When the detection piece 87 of the detector 88 is in contact with the notch area 86b on the peripheral surface of the cam 85, the detection signal output from the detector 88 is maintained at a low level. The 82 cutting edge 82a is arranged at the upper limit position P5. The movable blade 82 moves up and down by one rotation of the crank gear 80. At this time, the cutting edge 82a of the movable blade 82 passes through the predetermined cutting position P6 from the upper limit position P5, reaches the lower limit position P7, and again returns to the cutting position P7.
And returns to the upper limit position P5. Each gear 78, 7
When the cutting edge 82a moves down from the upper limit position P5 to the lower limit position P7, the period during which the movable blade 82 is angularly displaced and the second planetary arm 71 moves from the fourth position P4 to the second position P
The period for angular displacement to 2 is appropriately selected so as to be substantially the same.

The stopper 68 is located on the downstream side of the second planetary gear 64 in the direction of the arrow C3 and the cutting blade drive gear 6.
7 is arranged on the upstream side in the arrow C3 direction. When the second planetary arm 71 is located at the fourth position P4 which is a predetermined position, the stopper 68
And a protruding portion 72 that is in contact with the protruding portion. The angle at which the second platen drive gear 66 and the stopper 68 are angularly displaced from the second position P2 of the second planetary arm 71 to the fourth position P4 is:
They are arranged so as to have a predetermined angle θ2. The predetermined angle θ2 is set to, for example, 152 °.

FIG. 2 is a sectional view taken along line II-II of FIG. The second planetary arm 71 is provided with a snap fit 90. The snap fit 90 includes a base 98 erected on the substrate 96 of the second planetary arm 71,
A shaft portion 92 connected to the base portion 98 and a claw portion 9 connected to the shaft portion 92
3a and 93b, and rotatably supports the second planetary gear 64. The shaft portion 92 is inserted through a shaft hole 94 of the second planetary gear 64. This snap fit 90
A notch 95 is formed in the claws 93a and 93b and the shaft 92, and has an interval L2 between the claws 93a and 93b.
The snap fit 90 is made of a flexible material such as a synthetic resin. The claw portions 93a and 93b have an outer diameter larger than the inner diameter of the shaft hole 94 of the second planetary gear 64 when no external force is applied, so that the second planetary gear 64
2 can be prevented. Also, the claw portion 93
When a and 93b are displaced in directions approaching each other, the tip portions 93a1 and 93a1, which are the outermost peripheral portions of the claws 93a and 93b, respectively.
93b1 retracts radially inward from the inner peripheral surface of the shaft hole 94, and in this state, the second planetary gear 64 can be easily attached and detached.

The surface of the second planetary gear 64 opposite to the surface on which the claw portions 93a and 93b are disposed with the second planetary gear 64 mounted is realized by, for example, a spring. The elastic member 91 is in contact. The elastic member 91 resiliently urges the second planetary gear 64 in a direction away from the substrate 96, and the claw portions 93a, 93
b. That is, the second planetary gear 64 rotates while slidingly contacting the bottom surface 97 of each of the claws 93a and 93b. Referring again to FIG. 1, the second planetary gear 64
Is pivotally supported on the second planetary arm 71 by the snap fit 90 and the elastic member 91. Therefore, when the sun gear 62 rotates in the direction of the arrow C1 or C2, a frictional force is generated between the second planetary gear 64 and the snap fit 90, and the second planetary gear 64 can revolve due to the rotation of the sun gear 62. When the second planetary gear 64 and the second platen drive gear 66 are in mesh with each other, the second planetary arm 71
Means that the revolution in the arrow C4 direction has been prevented.
In this state, the second planetary gear 64 causes the snap fit 90 by the rotational force of the sun gear 62 in the direction of arrow C2.
Then, the rotation of the second platen drive gear 66 is started, against the frictional force of the elastic member 91, and the second platen drive gear 66 is rotated. Also the second
In the state where the planetary arm 71 is prevented from revolving in the direction of arrow C3 by the stopper 68 at the fourth position P4, the second
The planetary gear 64 rotates against the frictional force of the snap fit 90 and the elastic member 91. The first planetary gear 63 is, like the second planetary gear 64, a snap fit 90 of the first planetary arm 72 and an elastic member 91.
It is rotatably supported by. Therefore, like the second planetary gear 64, the first planetary gear 63 revolves due to the rotational force of the sun gear 62, and when engaged with the first platen drive gear 65 and the cutting blade drive gear 67, resists the frictional force. It is configured to be able to rotate. In general, the dynamic frictional force is smaller than the static frictional force, so that when the first and second planetary gears 63 and 64 start rotating, the reduction in the driving force transmission efficiency can be reduced. In this way, in a state where the sun gear 62 does not rotate, it is possible to eliminate the problem that the first and second planetary gears 63 and 64 revolve due to their own weight.

FIG. 3 is a block diagram schematically showing the electrical configuration of a facsimile provided with the driving device 60. The detector 88 is electrically connected to the control means 69. The control means 69 controls the motor 99 based on a detection signal from the detector 88 and a received signal from the outside (not shown).
Rotation and stop, and switching of the thermal head between active and inactive.

FIG. 4 is a flow chart for explaining the operation of the control means 69, and FIG.
6 is a timing chart for explaining a correlation between a detection signal output from a detector 88 and a state of a thermal head 76. FIG. 6 shows the driving device 6 in the cutting mode.
FIG. 7 is a configuration diagram illustrating a state of the driving device 60 in a recording paper pull-in mode.

The operation starts from step a1. Step a1 is a standby state. In this standby state, the control means 69 stops the motor 99 and
6 is kept inactive. In this standby state, the first planetary arm 70 is located at the first position P1, and the first planetary gear 63 and the first platen driving gear 65 are maintained in a meshed state. As described above, the first planetary gear 63 can be maintained in a state of being meshed with the first platen drive gear 65 by the frictional force generated between the first planetary gear 63 and the claw portions 93a and 93b. In the standby state, the cutting edge 82a of the movable blade 82 is located at the upper limit position P5. In this state, the detection piece 87 of the detector 88 is disposed in the notch area 86b of the cam 85, and the detection signal output from the detector 88 is at a low level.

At step a2, it is determined whether or not the standby state has been released. The control unit 69 maintains the standby state in a state where no print content is received from the outside. When the control means 69 receives a print content from outside at time t1, the standby state is released, and the process proceeds to step a3. The print content is received by the control means 69,
Information to be printed on the recording paper 61.

At step a3, a printing operation is performed. The control means 69 drives the motor 99 at time t1 to rotate the sun gear 62 in the direction of arrow C1. The control means 69 outputs a command signal to the connector 77 to activate the thermal head 76. The sun gear 62 is the motor 99
When the platen roller 75 is rotated in the direction of arrow C1 at substantially the same time, the platen roller 75 starts rotating in the rotation direction C1 ′ for transporting the recording paper 61 in the recording paper drawing direction indicated by arrow C5. Thus, it is possible to print on the surface of the recording paper 61 passing through the printing position P8 below the thermal head 76 while transporting the recording paper 61 in the recording paper withdrawing direction. In a state where the sun gear 62 is rotationally driven in the direction of arrow C1, the second planetary arm 71 revolves in the direction of arrow C3 and reaches the second position P2.
8 prevents the revolution in the C3 direction. Thus, in the recording paper withdrawal mode starting from time t1,
Only the platen roller 75 is rotationally driven in the direction of the arrow C1 'for transporting the recording paper to the arrow C5, and maintains the movable blade 82 at the upper limit position P5. After the start of the printing operation, the process proceeds to step a4.

At step a4, it is determined whether or not the printing operation of the printing contents has been completed for one page. If the determination is negative, the process returns to step a3, and the printing operation is repeated until the determination becomes positive. When the determination is affirmative, that is, when the printing of the print content is completed for one page, the control unit 69
Switches the thermal head 75 from the active state to the inactive state at time t2. The control means 69 controls the motor 9
9, the recording paper 61 is moved from the printing position P8 to the movable blade 82.
Then, after waiting for a period W1 required to carry by the distance L1 to the cutting position P9 where the cutting is performed by the fixed blade 89, the process proceeds to step a5.

At step a5, the control means 69 rotates the motor 99 in the reverse direction to rotate the sun gear 62 in the direction of the arrow C2 opposite to the direction of the arrow C1. As a result, the first planetary gear 63 is separated from the first platen drive gear 65, and the platen roller 75 stops. First planetary gear 63
Is separated from the first platen drive gear 65 by an arrow C
It revolves in four directions and meshes with the cutting blade drive gear 67. As a result, the rotational force from the motor 99 is transmitted by the gears, the crank gear 80, and the like, and the cutting operation of the movable blade 82 is started. At time t4, when the first planet arm 70 reaches the third position P3, the torque of the motor is transmitted, and the crank gear 80 is driven to rotate, the cam 85 also rotates with this rotation, thereby causing the detector 88 to rotate. Is in sliding contact with the arc region 86a of the cam 85. As a result, the detection signal output from the detector 88 switches from a low level to a high level. Cutting edge 82a of movable blade 82
Is lowered from the upper limit position P5 and reaches the cutting position P6, the recording paper 61 is cut. In this state, as shown in FIG. 6, the second planetary gear 64
Since 1 has not reached the fourth position P4, the platen roller 75 is kept stopped. That is, the cutting by the movable blade 82 and the fixed blade 89 can be performed while the recording paper 61 is stopped. After the reverse rotation operation of the motor 99 is started, the process proceeds to step a6.

At step a6, it is determined whether or not the detection signal output from the detector 88 has been switched from high level to low level. If the determination is negative, the process returns to step a5 and the control unit 69 continues until the determination is positive.
Causes the motor 99 to continue the reverse operation.

When the second planetary arm 71 reaches the fourth position P4 at time t5, the second planetary gear 64 and the second platen driving gear 66 mesh with each other. In this state, as shown in FIG. 7, the cutting edge 82a of the movable blade 82 has reached the lower limit position P7, thereby ending the recording paper cutting mode. When the second planetary gear 64 meshes with the second platen drive gear 66, the platen roller 75 is driven to rotate in the direction of arrow C2 'by the rotational force of the motor 99. As a result, the recording paper 61 is moved in the direction indicated by an arrow C
The recording paper is conveyed in the pull-back direction indicated by reference numeral 6. Further, the cutting blade drive gear 67 is rotated by the rotational force from the motor 99, and the movable blade 82 starts returning the cutting edge 82a to the upper limit position P5. At this time, the recording paper 61 is at the time t5.
Since the retracting operation has been started at
The edge 82a of the recording paper 61 slides on the leading end 61a of the recording paper 61, and the disadvantage that the leading end 61a of the recording paper 61 is damaged can be eliminated. When the movable blade 82 rises and the cutting edge 82a reaches the upper limit position P5, the detection piece 87 of the detector 88 slides on the notch area 86b of the cam 85, whereby the detection signal output from the detector 88 becomes high level. To low level. When the detection signal from the detector 88 switches from the high level to the low level, the control unit 69 switches the operation of the motor 99 from the reverse rotation operation to the normal rotation operation, and rotates the sun gear 62 in the arrow C1 direction.

In step a7, the control means 69 causes the motor 99 to rotate the sun gear 62 by a predetermined angle in the direction of arrow C1. The predetermined angle is an angle of the sun gear 62 required for the first planetary arm 70 to revolve from the third position P3 to the first position P1. Sun gear 62
Is rotated in the direction of arrow C1 by the predetermined angle, and the process proceeds to step a8.

At step a8, the control means 69 determines whether or not printing of the print contents has been completed for all pages. If the determination is negative, the process returns to step a3 to start a printing operation for the remaining print contents. If the determination is affirmative, the process shifts to step a9 and ends the operation.

As described above, in the configuration of the embodiment of the present invention, since the first platen drive gear 65 and the cutting blade drive gear 67 are arranged close to each other in the circumferential direction of the sun gear 62, the first planetary gear is provided. The arm 70 moves from the first position P1 to the third position P
It is possible to make the period w2 required for revolving to 3 as short as possible. As a result, the period of switching from the recording paper pulling operation to the cutting operation can be shortened as much as possible. A period w3 required for the second planetary arm 71 to be angularly displaced from the second position P2 to the fourth position P4 along the circumferential direction of the sun gear 62 is set to be longer than the period w2. With this configuration, the recording paper 61 can be cut by the movable blade 82 and the fixed blade 89 before the operation of pulling in the recording paper 61 by the platen roller 75 is started. Accordingly, it is possible to eliminate the problem that the blade edge 82a comes into contact with the recording paper 61 while the recording paper 61 is being conveyed in the retraction direction, and the blade edge 82a and the recording paper 61 are damaged.

When the movable blade 82 starts the cutting operation at time t4, the cutting edge 82a moves from the upper limit position P5 to the cutting position P6.
, And reaches the lower limit position P7. This cutting edge 82
During a period w4 until a returns to the cutting position P6 again, the second planetary arm 71 reaches the fourth position P4, whereby the platen roller 75 starts the drawing operation of the recording paper 61. It is possible to eliminate the problem that the blade edge 82a that is going to return to the cutting position P6 is in sliding contact with the leading end 61a of the recording paper 61 and the leading end 61a of the recording paper 61 is damaged. In the pull-in operation of the recording paper 61, the recording paper 61 is moved for a period w from time t5 to time t6.
6 is drawn in. The drawing amount of the recording paper 61 is the second
An arbitrary value can be set by appropriately selecting the reduction ratio of the platen drive gear 66. Also, the recording paper 61
The sun gear 62 is rotated in the direction of arrow C1 by a period w5 every time the pull-in operation of
Since the state returns to the standby state in which the first planetary gear 63 and the first platen drive gear 65 are meshed with each other, when the standby state is released next time, the rotational force of the motor 99 immediately increases the platen roller 7.
5 and the operation of pulling out the recording paper 61 is started.
Therefore, the margin between the leading end surface of the recording paper 61 and the print position P8 can always be set to a predetermined size, and the period necessary for printing the first print content is made as short as possible. be able to.

In accordance with the rotation direction of the sun gear 62,
Since the arrangement positions of the first and second planetary gears 63 and 64 are adjusted, the switching gear and the electromagnetic solenoid can be dispensed with as in the first to third prior arts described above. A component for connecting the electromagnetic solenoid and the switching gear to the first and second planetary gears or a component for connecting the electromagnetic solenoid to the first and second planetary gears can be eliminated. Therefore the first
-The number of parts can be reduced as compared with the third related art, whereby the size of the drive device 60 can be reduced and the cost of parts can be reduced.

Further, as compared with the first prior art, the period required for switching the arrangement positions of the first and second planetary gears 63 and 64 can be shortened, so that an expensive motor 99 is not required, and a communication error is eliminated. Can be reduced.

In the above-described embodiment, the second platen driving gear 66 is used to rotate the platen roller 75 by meshing with the second planetary gears 63 and 64. However, for example, the second platen driving gear 66 is used. May be eliminated. By eliminating the second platen drive gear 66, the amount of retraction when the recording paper 61 is retracted from the cutting position P9 to the printing position P8 in the retraction operation of the recording paper 61 is reduced, and the margin from the leading end surface of the recording paper 61 is reduced. Although larger, the cost of parts can be further reduced by reducing the number of parts by one.

[0075]

According to the first aspect of the present invention, when the sun gear is rotated in the forward direction, the first planetary gear meshes with the platen drive gear, and the rotational force is transmitted to the platen drive gear. The roller is driven to rotate in a direction corresponding to the forward rotation of the sun gear. On the other hand, the cutting blade drive gear
In the predetermined position, the planetary gear is prevented from being displaced in the first revolution direction, in other words, from being displaced in the direction approaching the cutting blade drive gear, by the blocking means. It does not mesh with the planetary gears and is not driven to rotate. Therefore, the recording paper can be pulled out by rotating only the platen roller.

In the facsimile recording paper retracting mode and cutting mode, when the sun gear is rotated in the reverse direction by the motor, the second planetary gear meshes with the platen driving gear and the first planetary gear engages with the cutting blade driving gear. The gears mesh. In this state, the cutting blade drive gear is driven to rotate, and the cutting blade performs a cutting operation. The platen roller is driven to rotate in a rotation direction corresponding to the rotation of the sun gear in the reverse direction. In other words, it is driven to rotate in the direction opposite to the direction in which the recording paper is pulled out in the recording paper pull-out mode, whereby the recording paper can be pulled in.

As described above, according to the configuration of the present invention, it is possible to perform the operation of pulling out the recording paper, the cutting operation, and the operation of retracting the recording paper in accordance with the rotation direction of the sun gear. That is, it is necessary to hold the arrangement positions of the first and second planetary gears at positions where the first and second planetary gears do not mesh with the platen drive gear and the cutting blade drive gear against the rotational torque of the sun gear. In comparison, the first and second
There is no need to provide components for holding the planetary gears in place. As a result, the number of parts can be reduced, the size of the apparatus can be reduced, and the cost of parts and manufacturing can be reduced.

According to the second aspect of the present invention, since the platen driving gear and the cutting blade driving gear are arranged close to each other in the circumferential direction of the sun gear, the position where the first planetary gear meshes with the platen driving gear. The distance along the first revolving direction from the position to the position meshing with the cutting blade drive gear can be reduced as much as possible, thereby shortening the time required for switching from the recording paper withdrawal mode to the cutting mode. Therefore, the probability of a communication error can be reduced.

According to the third aspect of the present invention, the period required for the displacement of the first planetary gear from the position at which the first planetary gear meshes with the platen drive gear to the position at which it meshes with the cutting blade drive gear is the second period.
Since the planetary gear is shorter than the period required for displacement from the predetermined position to the position meshing with the platen driving gear, the rotating operation of the cutting blade driving gear, that is, the switching operation, when the platen driving gear is not rotationally driven, that is, the switching operation Can be started. In this way, the recording paper can be cut by the cutting blade with the recording paper stopped,
It is possible to eliminate the problem that the cutting edge of the cutting blade is missing and the problem that the surface of the recording paper is damaged along the recording paper conveyance direction.

According to the fourth aspect of the present invention, after the recording paper is cut by the cutting blade, the second planetary gear is driven by the platen during a period until the cutting blade returns to the cutting position where the recording paper has been cut. Since the gear is engaged with the drive gear and the drawing operation of the recording paper is started, the leading end of the recording paper cut by the cutting blade slides on the cutting blade which returns to the cutting position after the cutting of the recording paper and is damaged. It is possible to eliminate such a trouble as to do.

According to the fifth aspect of the present invention, each time a predetermined recording operation is completed, the sun gear is driven to rotate in the forward direction so that the first planetary gear and the platen driving gear mesh with each other. Therefore, when starting the next recording operation, the rotational driving of the sun gear is started, and at the same time, the rotational force is transmitted to the Latin driving gear, so that the drawing operation of the recording paper can be started. The margin between the leading edge of the mark and the printing position on the recording paper surface can be set to a predetermined size,
In addition, the communication period of the first reception can be made as short as possible.

[Brief description of the drawings]

FIG. 1 is a simplified configuration diagram showing a driving device 60 according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along the line II-II in FIG.

FIG. 3 is a simplified block diagram showing an electrical configuration of a facsimile using the driving device 60;

FIG. 4 is a flowchart for explaining the operation of the control means 69;

FIG. 5 is a timing chart illustrating a correlation between a detection signal output from a driving device 60, a detector 81, and a state of a thermal head 76.

FIG. 6 is a configuration diagram for explaining a state of a driving device 60 in a cutting mode.

FIG. 7 is a configuration diagram for explaining a state of a driving device 60 in a recording paper pull-in mode.

FIG. 8 is a configuration diagram for explaining a switching mode of the first related art.

FIG. 9 is a configuration diagram for explaining a recording paper withdrawal mode of the first related art.

FIG. 10 is a configuration diagram for explaining a cutting mode of the first related art.

FIG. 11 is a configuration diagram for explaining a recording paper pull-in mode of the first related art.

FIG. 12 is a configuration diagram for explaining the operation of the second conventional technique.

[Explanation of symbols]

 Reference Signs List 60 Drive device 62 Sun gear 63 First planetary gear 64 Second planetary gear 65 First platen drive gear 66 Second platen drive gear 67 Cutting blade drive gear 68 Stopper 70 First planetary arm 71 Second planetary arm 74 Platen gear 75 Platen Roller 76 Thermal head 82 Movable blade 82a Cutting edge 89 Fixed blade C1 Forward direction C2 Reverse direction C3 First revolving direction C4 Second revolving direction

Claims (5)

[Claims] A sun gear rotatably driven in both forward and reverse directions;
First and second planetary gears that can individually revolve in a revolving direction and a second revolving direction corresponding to the reverse direction, and in the orbital path of the first and second planetary gears, the first and second planetary gears A platen drive gear provided on the downstream side in the revolving direction and on the upstream side in the first revolving direction from the second planetary gear; and in the revolving path of the first planetary gear, the downstream side in the second revolving direction from the first planetary gear. And a cutting blade drive gear provided upstream of the second planetary gear in the second revolving direction, and a cutting blade drive gear provided downstream of the second planetary gear in the first revolving direction and first of the cutting blade drive gear. Blocking means for preventing displacement of the second planetary gear in the first revolving direction at a predetermined position on the upstream side in the revolving direction; platen roller driven bidirectionally by rotation of the platen driving gear; and cutting blade drive Cutting operation by rotation of gear Facsimile driving apparatus characterized by including a cutting blade that. 2. The facsimile driving device according to claim 1, wherein the platen driving gear and the cutting blade driving gear are arranged close to each other in a circumferential direction with the first planetary gear interposed therebetween. 3. The blocking means is arranged such that the distance between the blocking means and the platen driving gear in the second revolving direction is larger than the distance between the platen driving gear and the cutting blade driving gear in the second revolving direction. 3. The facsimile driving device according to claim 1, wherein 4. The second planetary gear meshes with the platen drive gear during a period from when the cutting blade passes through the predetermined cutting position to when the cutting blade returns to the cutting position again. The facsimile driving device according to any one of the above. 5. The facsimile machine according to claim 1, wherein each time a predetermined recording operation is completed, the first planetary gear is engaged with the platen drive gear. Drive.