JPH0693722B2 - Fax machine - Google Patents

Description

The present invention relates to a facsimile apparatus having a copying function.

<Prior Art> In a facsimile apparatus having a copy function in addition to a document information transmission / reception function, generally, the document reading unit reads the document information of a document conveyed by a document conveying roller, and the document reading unit reads the document information. While the original information is transmitted by the transmitting unit, the recording unit records the original information received by the receiving unit and the original information read by the original reading unit on the recording paper conveyed by the recording paper conveying roller. ing.

In the past, as such a facsimile machine, a machine having two driving motors, that is, a motor for driving a document carrying roller and a motor for driving a recording paper carrying roller, has been mainly used. This facsimile machine rotates one of the motors during transmission and reception, and simultaneously rotates two motors during copying.

<Problems to be Solved by the Invention> By the way, in recent years, as the size and cost of the facsimile apparatus have been reduced, in the above-mentioned conventional facsimile apparatus that requires two motors, the space occupied by the motor as a whole is large. The ratio of the cost and the ratio are increasing,
A major issue is to reduce the size and cost by using one drive motor. Therefore, it is conceivable to change the rotation direction of one motor to drive the original document conveyance roller and the recording paper conveyance roller separately, but in this case, the original document information read during copying is temporarily stored in the memory. The original information stored in the memory must be recorded on the recording paper after the original is stored in the storage medium and is conveyed to the end. Therefore, there is a problem that a memory having a large storage capacity is required and copying takes time.

Therefore, an object of the present invention is to use a single motor to separately drive the document transport roller and the recording sheet transport roller during transmission / reception, and simultaneously drive the two rollers during copying. It is an object of the present invention to provide a facsimile apparatus that does not require a memory for storing the.

<Means for Solving the Problems> In order to achieve the above object, the present invention, at the time of transmission, reads the document information on the document conveyed by the document conveying roller by the document reading unit and transmits it by the transmitting unit. In the facsimile apparatus, the original information received by the receiving means at the time of reception and the original information read by the original reading means at the time of copying are recorded on the recording paper conveyed by the recording paper conveying roller by the recording means. A first transmission gear that transmits the rotational torque to the shaft of the document conveying roller, a second transmission gear that transmits the rotational torque to the shaft of the recording sheet conveying roller, and a motor mounted coaxially during the transmission and copying. While rotating the gear forward, the motor rotates the motor in reverse during the above reception, and both ends rotate around a fulcrum provided in the center. It has an intermediate gear that is movably provided and that is always meshed with the second transmission gear at one end and meshes with the motor gear when the one end is rotated in one direction. At the time of copying, the one end is rotated in the one direction to mesh the intermediate gear with the motor gear, while at the time of transmission and reception, the one end is rotated in the other direction to move the intermediate gear from the motor gear. A first lever having a rotating means for moving it to a predetermined position apart from the first lever, and one end of which is provided so as to swing around the outer periphery of the motor gear around a fulcrum,
The one end has a rotary gear to which the motor gear is constantly meshed and which has a rotational resistance added thereto. When the motor gear is normally rotated by the motor, the rotary gear swings toward the first transmission gear side. The rotary gear is also meshed with the first transmission gear to transmit the rotational torque of the motor to the first transmission gear, and when the motor gear is reversed by the motor, the rotation torque is transferred to the second transmission gear side. A second lever that swings to mesh the rotary gear with the intermediate gear at a predetermined position apart from the motor gear to transmit the rotational torque of the motor to the second transmission gear via the intermediate gear. It is characterized by having it.

<Operation> During transmission, the motor gear rotates in the forward direction by the motor.
Then, the rotary gear that is always meshed with the motor gear provided at the one end of the second lever is rotated, and one end of the second lever swings toward the first transmission gear due to the rotation resistance at that time. The rotating gear meshes with the first transmission gear. Then, the rotation torque of the motor is transmitted to the first transmission gear. In this way, the rotational torque is transmitted to the shaft of the document conveying roller via the first transmission gear.

Also, upon reception, the motor rotates the motor gear in reverse. Then, the rotary gear is rotated and one end portion of the second lever is swung toward the second transmission gear due to the rotation resistance at that time, and the rotary gear is meshed with the intermediate gear that is always meshed with the second transmission gear. . Then, the rotation torque of the motor is transmitted to the second transmission gear via the intermediate gear. In this way, the rotational torque is transmitted to the shaft of the recording paper conveyance roller via the intermediate gear and the second transmission gear.

Further, at the time of copying, as in the case of the above-described transmission, the motor gear rotates the motor gear in the forward direction to rotate the rotary gear, and the rotation resistance at that time causes the rotary gear to mesh with the first transmission gear. The rotation torque of the motor is transmitted to the shaft of the document conveying roller via the first transmission gear. Further, one end of the first lever is rotated in one direction by a rotating means provided at the other end of the first lever, and the intermediate gear is provided at the one end and constantly meshes with the second transmission gear. Is meshed with the motor gear. In this way, the rotational torque is transmitted to the shaft of the recording paper conveyance roller via the intermediate gear and the second transmission gear.

<Example> Hereinafter, the present invention will be described in detail with reference to illustrated examples.

1 is a plan view of an essential part of an embodiment of the present invention, and FIG. 2 is a sectional view taken along line II-II of FIG.

In FIGS. 1 and 2, an image sensor 1 as a document reading unit is pressed in the direction of arrow B by a pressure spring 1a and is pressure-bonded to a platen roller 2 for reading. The shaft portion 2a of the reading platen roller 2 is rotatably supported at both ends by bearings 15a fixed to the chassis 15. A gear 3 is fixed to one end of the shaft portion 2a. The gear 3 meshes with a reduction gear 4 rotatably attached to a shaft 4 a that is erected in a gear base 14, and the rotational force transmitted from the motor 10 via the reduction gear 4 is transmitted to the platen roller. It is designed to be transmitted to 2.

On the other hand, the thermal head 5 as a recording means is a pressure spring 5a.
Is pressed in the direction of arrow A by the recording platen roller 6
Is crimped to. The shaft portion 6a of the recording platen roller 6 is rotatably supported at both ends by bearings 15b fixed to the chassis 15. A gear 7 is fixed to one end of the shaft portion 6a. The gear 7 meshes with a reduction gear 8 rotatably attached to a shaft 8 a that is erected on a gear base 14. A mode lever 16 is provided on the shaft 8a so as to be rotatable in the arrow CD direction. An intermediate gear 9 that is rotatably attached to the shaft 9a that is erected on the mode lever 16 and that meshes with the reduction gear 8 is provided at the tip of the mode lever 16. The gear 7 transmits the rotational force from the motor 10 transmitted via the gear 9 and the gear 8 to the recording platen roller 6.

The mode lever 16 is constantly urged to rotate in the direction of arrow C by a spring 17 suspended between the mode lever 16 and the gear base 14. The base 14 is provided with a protrusion 14a, which restricts the rotation of the mode lever 16 in the direction of arrow C and positions the intermediate gear 9 during transmission or reception. The solenoid 18 is fixed to the gear base 14, and a movable iron core 18a movable in the arrow EF direction engages with the mode lever 16.

The motor gear 11 is press-fitted into the rotating shaft 10a of the motor 10. In addition, the motor 10 is mounted on the gear base 14 with the screws 10a and 10b.
It is fixed to. The lever 12 is attached to a fulcrum 12a set up on the gear base 14 so as to be swingable in the direction of arrow GH. The gear 13 is rotatably attached to a shaft 13a installed on the lever 12 and always meshes with the motor gear 11. Further, a spring 13b is rotatably attached to the shaft 13a coaxially with the gear 13, and an appropriate slip torque is applied to the gear 13 by pressing the gear 13 against the lever 12 with an appropriate load.

That is, in this embodiment, the first transmission gear is composed of a gear train consisting of the gear 3 and the reduction gear 4, the rotary gear is composed of the gear 13, and the second transmission gear is composed of the gear 7 and the reduction gear 8. The rotation means is composed of a spring 17 and a solenoid 18.

The operation of the facsimile drive mechanism configured as described above will be described with reference to FIGS.

FIG. 3 shows the transmission state. First, when a document is inserted, a document detection sensor (not shown) operates and the motor 10 rotates in the direction of arrow H. Since the gear 13 has an appropriate slip torque, the lever 12 rotates in the direction of arrow H with the rotation of the motor 10, and the gear 13 meshes with the reduction gear 4. Therefore, the rotational force of the motor 10 is
It is transmitted to the reading platen roller 2 and a document conveying roller (not shown) via the gear 11, the gear 13, the reduction gear 4, and the gear 3.
Then, the inserted document is transported to the reading standby position by the document transport roller. After that, when the transmission mode is selected, the solenoid 18 is not energized, and the mode lever 16 is regulated by the spring 17 up to the protrusion 14a.
It does not mesh with the gear 13 and the rotational force of the motor 10 is not transmitted to the recording platen roller 6. The original conveyed by the original conveying roller is sandwiched between the image sensor 1 and the reading platen roller 2, and is conveyed in the arrow original conveying direction by the frictional force between the reading platen roller 2 and the original. The image information of the original is sequentially read by the image sensor 1 and transmitted.

FIG. 4 shows the reception state. When the facsimile is received, the motor 10 rotates in the direction of arrow G. gear
With the slip torque of 13, the lever rotates with the rotation of the motor 10.
12 rotates in the direction of arrow G, and the gear 13 meshes with the intermediate gear 9. At this time, the solenoid 18 is not energized, the mode lever 16 is regulated by the spring 17 to the protruding portion 14a, the intermediate gear 9 does not mesh with the motor gear 11, and the lever 12 rotates in the arrow G direction. It is positioned so as to mesh with the gear 13. Therefore, the rotational force of the motor 10 is transmitted to the recording platen roller 6 via the motor gear 11, the gear 13, the intermediate gear 9, the reduction gear 8 and the gear 7. The recording paper is always sandwiched between the thermal head 5 and the recording platen roller 6, and is conveyed in the arrow direction of the recording paper by the frictional force between the recording platen roller 6 and the recording paper and transmitted. The incoming image information is sequentially recorded on the recording paper by the thermal head 5.

Next, FIG. 5 shows a state in the copy mode. In the copy mode, the image information read by the image sensor 1 is transferred to the thermal head 5 and recorded on the recording paper, so that a storage unit for the image information is not required and the copying time can be shortened. Therefore, it is better to drive the transporting means for transporting the original and the transporting means for transporting the recording paper at the same time. In FIG. 5, first, when a document is inserted, a document detection sensor (not shown) operates and the motor 10 rotates in the direction of arrow H. The rotational force of the motor is transmitted to the not-shown document conveying roller and the reading platen roller 2 via the motor gear 11, the gear 13, the reduction gear 4 and the gear 3 as in the transmission state of FIG. The document is conveyed by a document conveying roller (not shown) to the reading standby position. After that, when the copy mode is selected, the solenoid 18 is energized, and the movable iron core 18a is attracted by the force that overcomes the spring 17 in the arrow E direction. Since the movable iron core 18a is engaged with the lever 16, the lever 16 rotates in the direction of arrow D, the intermediate gear 9 attached to this meshes with the motor gear 11, and the rotational force of the motor 10 is transmitted to the motor gear 11 and the intermediate gear. The recording paper is conveyed by being transmitted to the recording platen roller 6 via the gear 9, the reduction gear 8, and the gear 7. The document conveyed to the reading standby position is sandwiched between the image sensor 1 and the reading platen roller 2, and at the same time as the copy mode is selected, the document conveyance and the reading of image information are started. Image information is sequentially read by the image sensor 1 as the document is conveyed, transferred to the thermal head 5, and simultaneously recorded on the conveyed recording paper.

FIG. 6 is an example of a time chart showing the relationship between the rotation of the motor 10, the operation of the solenoid 18, and the conveyance state of the original and the recording paper in each of the above operations. 6A shows the transmission mode (FIG. 3), FIG. 6B shows the copy mode (FIG. 5), and FIG. 6C shows the reception mode (FIG. 4). In the figure, Ta is the recording paper ejection time from the completion of reading the original to the ejection, and Tb is the recording paper ejection time from the completion of recording the image information to the ejection.

In the transmission mode, when a document is inserted, the motor 10 rotates, the document is conveyed to the reading standby position, and the motor 10 stops. Next, when a send command is input, the motor 10
Rotates, and image information is read and transmitted. In the copy mode, when a document is inserted, the motor is operated in the same way as above.
10 rotates, the document is conveyed to the reading standby position, and the motor
10 stops. Next, when a copy command is input, the solenoid 18 is energized, the motor 10 rotates, the original and the recording paper are conveyed, and the read image information is recorded on the recording paper. In the reception mode, the motor
10, the recording paper is conveyed, and the received image information is recorded on the recording paper.

<Effects of the Invention> As is apparent from the above, the facsimile apparatus of the present invention transmits the rotational torque of the motor to the shaft of the document conveying roller via the first transmission gear during transmission, and receives the intermediate gear and the second gear during reception. The rotational torque of the motor is transmitted to the shaft of the recording paper conveying roller via the transmission gear, and the rotational torque of the motor is transmitted to the shaft of the original conveying roller via the first transmission gear during copying. Since the rotational torque of the motor is transmitted to the shaft of the recording paper conveyance roller via the intermediate gear and the second transmission gear, one motor can perform transmission, reception, and copying, and the motor is The size of the entire device can be reduced as compared with the case of using a table.

Further, as described above, since the original document and the recording paper can be conveyed at the same time during the copying, a memory for storing the original document information is not required, and the original document information is temporarily stored in the memory. Compared with this, the copying time can be shortened.

[Brief description of drawings]

FIG. 1 is a plan view of an essential part of an embodiment of the present invention, FIG. 2 is a sectional view taken along the line II-II of FIG. 1, and FIG. 3 is a view for explaining the operation during transmission in the above embodiment, and FIG. FIG. 5 is a diagram for explaining the operation during reception in the above embodiment, FIG. 5 is a diagram for explaining the operation during copying in the above embodiment, and FIG. 6 is a time chart for explaining the operation in the above embodiment. 1 ... Image sensor, 2 ... Reading platen roller, 3,7,13 ... Gear, 4,8 ... Reduction gear, 5 ... Thermal head, 6 ... Recording platen roller, 9 ... Intermediate gear , 10 …… motor, 11 …… motor gear, 12 …… lever, 14 …… gear base, 15 …… chassis, 16 …… mode lever, 17 …… spring, 18 …… solenoid.

Claims (1)

[Claims] 1. At the time of transmission, document information on a document conveyed by a document conveying roller is read by a document reading means and transmitted by a transmitting means, while at the same time the document information received by the receiving means and at the time of copying the document reading. In a facsimile apparatus in which the document information read by the means is recorded on the recording paper conveyed by the recording paper conveying roller by the recording means, a first rotating torque is transmitted to the shaft of the original conveying roller.
The transmission gear, the second transmission gear for transmitting the rotational torque to the shaft of the recording paper conveyance roller, and the motor gear coaxially mounted at the time of transmission and copying are normally rotated, while the motor gear is rotated at the time of reception. The motor is rotated in the reverse direction, and both ends thereof are provided so as to be rotatable around a fulcrum provided at the center. One end of the motor is always meshed with the second transmission gear and the one end is rotated in one direction. Has an intermediate gear that meshes with the motor gear, and at the other end, at the time of copying, rotates the one end in the one direction to mesh the intermediate gear with the motor gear, while transmitting and receiving. Sometimes, a first lever having a rotating means for rotating the one end in the other direction to move the intermediate gear to a predetermined position apart from the motor gear, and one end around the fulcrum, the one end of the outer periphery of the motor gear. The motor gear is provided so as to swing, and has at one end thereof a rotary gear that is constantly meshed with the motor gear to add rotation resistance, and when the motor gear is normally rotated by the motor, When the motor gear is reversed by the motor while swinging to the side of the first transmission gear to mesh the rotary gear with the first transmission gear to transmit the rotational torque of the motor to the first transmission gear. Is swung to the side of the second transmission gear so that the rotary gear meshes with the intermediate gear at a predetermined position apart from the motor gear to rotate the rotational torque of the motor through the intermediate gear to the second gear. A facsimile machine comprising a second lever for transmitting to a transmission gear.