JP2654136B2 - Recording paper supply device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION (Field of Industrial Application) The present invention relates to a recording paper supply device, and more particularly, to a recording paper supply in which two roll-shaped recording papers can be mounted and selectively switched and fed. Related to the device.

2. Description of the Related Art Conventionally, a recording paper supply apparatus that stores two recording papers and switches and feeds the recording papers as necessary so that the recording papers can be switched and used in accordance with the size of the recording paper or the size of a recorded image has been conventionally used. Proposed.

Such a conventional recording paper supply device is used, for example, in a facsimile machine, a printer, or the like, and is usually housed in a housing that can be opened and closed up and down via a fulcrum.
The two recording papers are respectively sent to a platen roller by a pair of feed rollers and a pressure roller, and each recording paper is guided to a platen roller by a guide section in the middle of the two recording papers. The feed roller and the pressure roller are all provided in the upper housing except for one pressure roller. When the upper housing is opened, one pressure roller is left, and two feed rollers and one pressure roller are left. Is opened at the top with the upper housing.

Therefore, when exchanging the recording paper, the upper housing is opened, the recording paper set below is set in the storage portion, and the recording paper is sunk between cutters through the upper portion of the platen roller, and is then taken out to the tip of the discharge roller. Next, the recording paper set upward is set in the storage portion, and inserted between the pressure roller and the feed roller which are attached to the upper housing and form a pair. The recording paper inserted between these rollers is sent out by turning a knob attached to the side surface of the feed roller, and the leading end is cut by a hand cutter in front of the platen roller. Next, the upper housing is closed, initial training is performed, and cutting and position adjustment of each recording sheet are performed.

In this conventional recording paper supply apparatus, the recording paper is fed by rotating the platen roller and the feed roller in synchronization, and each feed roller is a dedicated driving source different from the platen roller, for example, a stepping motor. It is driven by.

(Problems to be Solved by the Invention) However, in such a conventional recording paper supply device, a pair of feed rollers, a pressure roller, and one feed roller for supplying the recording paper are attached to the upper housing. Therefore, it was difficult and troublesome to replace the recording paper.

That is, as described above, the mounting method of the two recording sheets is completely different between the recording sheet set below and the recording sheet set above, and the operation of replacing the recording sheets is complicated and troublesome. Had become something. Particularly, for a person who exchanges the recording paper for the first time, the completely different mounting method for each recording paper complicates the exchange operation and complicates the operation.

In addition, it must be inserted between the recording paper set above and the pressure roller and feed roller attached to the upper housing, and this insertion must be performed by looking down from the lower part of the upper housing. However, there is a problem that it is difficult to replace the recording paper.

Furthermore, since the feed roller for feeding each recording paper is driven by a drive source different from the platen roller, it is necessary to match the amount of recording paper fed by the platen roller with the amount of recording paper fed by each feed roller. In addition, a complicated gear mechanism is required between the drive source of the feed roller and the feed roller, and an expensive drive source is required for each, resulting in high cost.

(Object of the Invention) In view of the above, the invention according to claim 1 divides the first transport roller pair and the second transport roller pair and attaches them to the lower housing, the upper housing, and the rotatable arm portion, and An object of the present invention is to make it possible to open a passage through which each recording sheet passes by opening a body and an arm portion, and to make the operation of changing recording sheets simple and easy.

According to a second aspect of the present invention, a driving source of a platen roller is supplied to one of the first conveying roller pair and one of the second conveying roller pair. By selectively switching and transmitting the driving force of the recording paper supply device, the structure of the recording paper supply device is simplified, and each transport roller is rotated by the driving source of the platen roller, thereby reducing the cost of the recording paper supply device. The aim is to reduce it.

Further, the invention according to claim 3 is provided with a recording paper sensor for detecting each recording paper, and automatically detecting the leading end of each recording paper by the recording paper sensor to automatically set the initial leading end position of the recording paper. It is an object of the present invention to make the operation of exchanging the recording paper and the adjustment of the initial leading edge position easier and easier.

(Structure of the Invention) In order to achieve the above object, an invention according to claim 1 is an upper housing and a lower housing that are connected to each other via a fulcrum so as to be openable and closable and that can store two roll-shaped recording papers. Consisting of
In a recording paper supply device for selectively supplying the recording paper to a platen roller, the lower housing is rotatably provided via a fulcrum, and the upper housing and the lower housing are closed when the lower housing is closed. An arm portion that forms a second conveyance path between the first housing and the upper housing, and a lower housing and an arm that are provided in the lower housing and the arm, respectively, and one of the recording papers is provided. A first transport roller pair for supplying a recording paper to a platen roller along the first transport path while nipping, and a first transport roller pair provided on an upper housing and an arm portion, respectively, for nipping the other of the recording paper while holding A second conveying roller pair for supplying the recording paper to the platen roller along the two conveying paths.
The invention according to claim 2, wherein one of the first transport roller pair and the second transport roller pair alternately rotates to supply the recording paper to the platen roller alternatively. The invention according to claim 1, wherein one of the first transport roller pair and one of the second transport roller pair are supplied from a driving source of a platen roller to the first transport roller pair. A transmission means for selectively driving and transmitting the driving force is provided. The invention according to claim 3, further comprising two roll-shaped recording papers which are connected to be openable and closable via a fulcrum. A recording paper supply device comprising an upper housing and a lower housing capable of storing the recording paper, and selectively supplying the recording paper to a platen roller.
The lower housing is rotatably provided via a fulcrum, and forms a first conveyance path between the upper housing and the lower housing when the lower housing is closed. A second arm that forms a conveyance path, a lower housing, and an arm that are provided on the arm and supply recording paper to a platen roller along the first conveyance path while nipping any one of the recording papers; A pair of transport rollers, and a pair of second transport rollers provided on the upper housing and the arm portion, respectively, for supplying the recording paper to the platen roller along the second transport path while nipping any one of the recording papers A first recording paper sensor that is provided in one of the lower housing and the arm and detects a recording paper conveyed through the first conveyance path; and a first recording paper sensor that is provided in one of the upper housing and the arm. The second detecting the recording paper conveyed through the second conveying path A recording paper sensor, and after setting the recording paper, selectively rotates the first conveyance roller pair and the second conveyance roller pair based on the output results of the first recording paper sensor and the second recording paper sensor. And transporting the leading end of the recording paper to a predetermined initial position.

 Hereinafter, a specific description will be given based on examples.

FIGS. 1 to 4 show claims 1, 2 and 3 respectively.
BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows one Example of the described invention, and is applied to the facsimile machine.

In FIG. 1, reference numeral 1 denotes a facsimile machine, and the external appearance of the facsimile machine 1 is constituted by a lower housing 2 and an upper housing 3. The upper housing 3 is supported by the lower housing 2 via a shaft 4 so as to be openable and closable, and is opened substantially 90 ° in the direction of the arrow in the figure by releasing a lock mechanism (not shown).

A recording paper holder 5 is formed in the lower housing 2, and storage portions 5 a and 5 b that can store two roll-shaped recording papers 6 and 7 are formed in the recording paper holder 5.

The recording paper 6 is fed by a feed roller 8 and a pressure roller 9 constituting a first conveying roller pair, and is fed between a platen roller 11 and a thermal head 12 through a conveying path (first conveying path) 10. . The feed roller 8 is driven to rotate as described later, and the pressure roller 9 is urged in the direction of the feed roller 8 by urging means (not shown), for example, a spring, and is pressed against the feed roller 8. Therefore, the pressure roller 9 rotates with the rotation of the feed roller 8, and the feed roller 8 and the pressure roller 9 move the recording paper 6 according to the rotation direction.
Feeding in the direction and rewinding. The first feeding path 10 is formed by a first lower guide portion 13 and a first upper guide portion 14, and is formed at an optimum interval for the recording paper 6 to pass and to wait. A sensor (first recording paper sensor) 15 is provided below the first lower guide 13, and the sensor 15 is applied to the recording paper 6 through a slit 13 a formed in the first lower guide 13. Presence or absence of end mark and recording paper 6,
Further, the leading end of the recording paper 6 is detected. As the sensor 5, for example, a reflection-type optical sensor or the like is used.

The recording paper 7 is guided between a feed roller 17 and a pressure roller 18 forming a second pair of transport rollers via a guide roller 16, and the feed roller 17 and the pressure roller 18 cause a second feed path (second transport path). The paper is fed between the platen roller 11 and the thermal head 12 through 19. The feed roller 17 is rotationally driven as described later in the same manner as the feed roller 8, and the pressure roller 18 is urged in the direction of the feed roller 17 by an urging means (not shown) to press the feed roller 17 in the same manner as the pressure roller 9. Have been. Accordingly, the pressure roller 18 rotates with the rotation of the feed roller 17, and the recording paper 7 guided by the guide roller 16 so as not to contact the recording paper 6 rotates with the platen roller with the rotation of the feed roller 17 and the pressure roller 18. It is fed in 11 directions and rewinded. The second feed path 19 is the second
It is formed by the lower guide section 20 and the thermal head 12 constituting the second upper guide section, and is formed at an optimum interval for the recording paper 7 to pass through and stand by. A sensor (second recording paper sensor) 21 similar to the sensor 15 is disposed below the second lower guide portion 20. The sensor 21 passes through a slit 20a formed in the second lower guide portion 20 to form a recording paper 7 (not shown). The presence or absence of the end mark or the recording paper 7 and the leading end of the recording paper 7 are detected.

The pressure roller 9 is rotatably supported by a base member or the like formed on the lower housing 2 via a bearing (not shown), and the first lower guide portion 13 is attached to the lower housing 2. The feed roller 8 and the pressure roller 18 are attached to free ends of a pair of arms (arm portions) 22, as shown in FIG.
It is rotatably attached to the lower housing 2 via 23. The arm 22 and the lock lever 24 are locked at a predetermined mounting position.
Is mounted so as to be rotatable. Therefore, the arm
The lock lever 24 is locked in the position shown in FIG. 1 by the lock lever 24, and is rotated in the direction of the arrow in FIG. 2 by releasing the lock of the lock lever 24. The arm 22 also has a first upper guide portion 14 and a second lower guide portion integrally formed.
20 is mounted, and a sensor 21 and a guide roller 16 are mounted. Therefore, the arm
When turning 22, the feed roller 8 and the pressure roller
18, first upper guide section 14, second lower guide section 20, sensor
The guide roller 21 and the guide roller 16 move together with the arm 22.

Further, as shown in FIG. 3, the platen roller 11 is rotatably supported via a bearing 27 on a base plate 26 provided in the lower housing 2, and is driven by a drive source (not shown) such as a step motor. It is driven to rotate. The thermal head 12 which comes into contact with the platen roller 11 is mounted on the upper housing 3 so as to be movable by a predetermined amount in the direction of the platen roller 11.
It is biased in 11 directions. Therefore, the thermal head
12 contacts the platen roller 11 with a predetermined pressure, and when a heat pulse based on image data is supplied to its heating element,
The heating element generates heat and records on the recording paper 6 or recording paper 7. The thermal head 12 and the feed roller 17 are attached to the upper housing 3.
When the upper housing 3 is opened, the feed roller 17 moves upward together with the upper housing 3.

A guide unit 27a, 27b cutter unit 28 and paper discharge rollers 29a, 29b are provided downstream of the platen roller 11, and these guide units 27a, 27b, cutter unit 28 and paper discharge rollers 29a, 29b It is attached to the body 2. A sensor 30 is provided below the guide portion 27a, and the sensor 30 detects the leading ends of the recording paper 6 and the recording paper 7. The cutter unit 28 is for cutting the recorded recording papers 6 and 7 into a predetermined length.
A clip 31 is provided on the upper part of the. Clip 31
Has a weak spring property and temporarily fixes the leading ends of the recording papers 6 and 7 when the recording papers 6 and 7 are mounted. On the upper surface of the cutter unit 28, the position where the leading edge of the recording paper 6, 7 is set when the recording paper 6, 7 is set is clearly indicated for each recording paper 6, 7. Thermal head 12
The recorded recording paper cut by the cutter unit 28 recorded in the above is discharged out of the apparatus by discharge rollers 29a and 29b.

A document table 32 on which a document to be transmitted is set is provided on the upper housing 3.
And a scanner unit 33 that scans the originals set on the original platen 32 one by one and reads the image information.

As shown in FIG. 3, the platen roller 11 rotatably supports the base plate 26 via a bearing 27, and a platen gear 41 is fixed to the tip of the platen roller 11. A pulley gear 42 meshes with the platen gear 41, and the pulley gear 42 is rotatably supported by a shaft 43 fixed to the base plate 26. A belt pulley 42a is formed integrally with the pulley gear 42, and a switching gear 44
Are rotatably supported by a shaft 46 fixed to the base plate 26. The switching gear 44 is always meshed with the idle gear 47 and the idle gear 48, and the idle gear 47 and the idle gear 48 are rotatable around shafts 49a and 50a provided at one end of the levers 49 and 50, respectively. It is supported by. The lever 49 and the lever 50 are rotatably supported by the shaft 46. The other end of the lever 49 and the lever 50 (the end opposite to the shafts 49a and 50a) are shown in FIG. Thus, the plungers 51a and 52a of the solenoid 51 and the solenoid 52 are attached. That is, the lever
Long grooves 51b and 52b are formed in the other end of the lever 49 and the lever 50 in the radial direction about the shaft 46, and the lever 49 and the lever 50 are provided with a pin 53 and a pin 53 passing through the long groove 51b and the long groove 52b. Plunger 51a and plunger 5 by 54
Linked to 2a. Plunger 51a and plunger 5
2a is urged outward in the axial direction by springs 55 and 56, and the rotation of the levers 49 and 50 by the springs 55 and 56 causes the other ends of the levers 49 and 50 to stop at the stoppers 57 and 58, respectively. It is regulated by contact. The stoppers 57 and 58 are formed by bending the base plate 26.

When the solenoid 51 and the solenoid 52 are energized,
Pull plunger 51a and plunger 52a inward,
When the plungers 51a and 52a are pulled inward, the lever 49
Rotates clockwise, and the lever 50 rotates counterclockwise. When the lever 49 and the lever 50 rotate, the idle gear 47 and the idle gear 48 attached to the lever 49 and the lever 50 respectively move the feed roller 8 and the feed roller
The gear meshes with a feed gear 59 and a feed carrier 60 fixed to 17. The feed roller 8 is mounted on the arm 22 as described above, but is rotatably mounted via a bearing 61 as shown in FIG. When the portion 49b comes into contact, the idle gear 47 and the feed gear 59 mesh with each other at a regular meshing position. Similarly, the feed roller 17 is rotatably attached to the upper housing 3 via a bearing (not shown). When the distal end portion 50b of the lever 50 comes into contact with the flange of the bearing, the feed roller 17 and the idle gear 48 are fed. The gear 60 meshes at the regular meshing position.

Therefore, when the platen roller 11 is rotationally driven by the motor, the rotation force is transmitted to the switching gear 4 via the platen gear 41, the pulley gear 42, the belt pulley 42a, and the belt 45.
The rotation of the switching key 44 is transmitted to the idle gear 47 and the idle gear 48. When the solenoid 51 or the solenoid 52 is energized and the idle gear 47 or the idle gear 48 meshes with the feed gear 59 or the feed gear 60, the feed gear 59 or the feed gear 60 is rotated by the idle gear 47 or the idle gear 48, and the feed roller 8 or one of the feed rollers 17 is rotated. That is, the rotational force of the platen roller 11 is selectively transmitted to the feed roller 8 or the feed roller 17, and the feed roller 8 and the feed roller 17 are rotationally driven by the motor that rotationally drives the platen roller 11. At this time, the feeding direction of the recording papers 6 and 7 by the rotation of the platen roller 11 is the same as the feeding direction of the recording papers 6 and 7 by the rotation of the feed roller 8 and the platen roller 11. In this embodiment, the platen gear 41, the pulley gear 42, the belt 45, the switching gear 44, the idle gears 47 and 48, the levers 49 and 50, the solenoids 51 and 52, and the feed gears 59 and 60 correspond to the feed rollers 8, 17 A transmission means for selectively switching and transmitting the driving force from the driving source of the platen roller 11.

 Next, the operation will be described.

First, operations for replacing and loading the recording papers 6 and 7 will be described.

When the recording papers 6 and 7 are exchanged and mounted, the lock mechanism (not shown) is released and the upper housing 3 is opened. At this time, the thermal head 12 and the feed roller 17 attached to the upper housing 3 move upward together with the upper housing 3, and the inside of the lower housing 2 and the second feeding path 19 are opened. Further, the lock lever 24 is released, and the arm 22 is largely rotated clockwise as shown in FIG. 2, so that the feed roller 8, the pressure roller 18, the first upper guide portion 14, Second lower guide part 20 and guide roller
Move 16 together. As a result, the first feed path 10 is opened and the feed roller 8 is
Move away from

In this state, a new recording paper 6 is stored in the storage section 5a,
This tip is temporarily fixed with a clip 31 in accordance with the set of the cutter unit 28 (indicated by a broken line in FIG. 1).

When the leading end of the recording paper 6 is temporarily fixed with the clip 31, the arm
22 is rotated to the set position side and locked by the lock lever 24. At this time, the feed roller 8 penetrates into the lower housing 2 while bending the recording paper 6 into a substantially V-shape, and the recording paper 6 is pulled downward by the feed roller 8.
However, since the recording paper 6 is heavy, the recording paper 6 does not rotate, the temporary fixing by the clip 31 is released, and the leading end of the recording paper 6 is in the first feeding path 10 on the right side of the platen roller 11. Drawn into.

Next, the recording paper 7 is stored in the storage section 5b, the leading end of which is passed over the guide roller 16 and drawn into the cutter unit 28, and is temporarily fixed with the clip 31 in accordance with the set position on the cutter unit 28 (No. (Indicated by a broken line in FIG. 1). When the leading end of the recording paper 7 is temporarily fixed with the clip 31, the upper housing 3
Is rotated in the closing direction and locked by a lock mechanism (not shown).
At this time, the recording paper 7 is urged downward by the feed roller 17 as the upper casing 3 is closed. Similarly, since the weight of the recording paper 7 is heavy, the temporary stop by the clip 31 is released.
The leading end of the recording paper 7 is a platen roller 11 and a thermal head 12
Is drawn near the pressure contact position.

As described above, the recording papers 6 and 7 can be replaced by the same mounting method without changing the mounting method between the recording paper 6 and the recording paper 7. Further, the recording paper 6 and the recording paper 7 can be easily mounted without being inserted between the feed roller 8 and the pressure roller 9 and between the pressure roller 18 and the recording paper 7, respectively. Mounting can be made simple and easy.

When the replacement and mounting of the recording papers 6 and 7 are completed, an initial training is then performed to adjust the leading end positions of the recording papers 6 and 7.

That is, the motor for the platen roller 11 is driven to rotate the platen roller 11 forward (rotate counterclockwise in FIG. 1), and at the same time, the solenoid 52 is energized to rotate the lever 50 counterclockwise. The gear 48 meshes with the feed gear 60. Therefore, when the platen roller 11 rotates forward, its rotational force is transmitted to the feed roller 17, and the feed roller 17 rotates forward (rotates clockwise in FIG. 1). Due to the rotation of the platen roller 11 and the feed roller 17, even when the leading end of the recording paper 7 is located before the platen roller 11 (right side in FIG. 1), the recording paper 7 is fed in the normal direction (normal feeding direction). The paper is fed, passes through the cutter unit 28, and is held by the paper discharge rollers 29a and 29b. Here, the cutter unit 28 is operated to cut the leading end of the recording paper 7, and the leading end side is discharged to the outside of the facsimile machine 1 by rotating the discharge rollers 29a and 29b, and the platen roller 11 is inverted (first). (Rotate clockwise in the figure). At this time, the solenoid
When the platen roller 11 is reversed, the rotation force is transmitted to the feed roller 17, and the feed roller 17 is reversed to pull the recording paper 7 backward.
When the leading end of the recording paper 7 reaches the standby position indicated by P in FIG. 1, the drive motor of the platen roller 11 is stopped and the power supply to the solenoid 52 is stopped. At this time, the leading end of the recording paper 7 is detected by the sensor 21, and the stop position is set by controlling the rotation of the drive motor. Therefore, the sensor
The leading end of the recording paper 7 can be easily and accurately initialized to a predetermined position based on the detection result of 21. The recording paper 7 is sandwiched between a feed roller 17 and a pressure roller 18, and the leading end thereof is held at a standby position P.

Next, the motor of the platen roller 11 is driven to rotate forward, and the solenoid 51 is energized to rotate the lever 49 clockwise, so that the idle gear 47 meshes with the feed gear 59. Therefore, when the platen roller 11 rotates forward, its rotational force is transmitted to the feed roller 8, and the feed roller 8 rotates forward. By the rotation of the platen roller 11 and the feed roller 8, the leading end of the recording paper 6 is sent to the platen roller 11 side. When the recording paper 6 is held between the platen roller 11 and the thermal head 12, a further conveying force is given to the cutter unit 28. Sent to When the leading end of the recording paper 6 is gripped by the discharge rollers 29a and 29b, the motor of the platen roller 11 is stopped, and the cutter unit 28 is operated to cut the leading end of the recording paper 6. When the recording paper 6 is cut,
The paper discharge rollers 29a and 29b are operated to discharge the leading end to the outside of the facsimile machine 1, and the motor of the platen roller 11 is reversely rotated, and the power supply to the solenoid 51 is continued. When the platen roller 11 rotates in reverse, the feed roller 8 also rotates in reverse, and the recording paper 6 is pulled back.

The leading edge of the recording paper 6 is the platen roller 11 and the thermal head
When reaching the pressure contact of No. 12, ie, just before the recording start position by the leading edge margin (toward the cutter unit 28), the drive of the drive motor of the platen roller 11 is stopped, and the power supply to the solenoid 51 is stopped. In the processing of the leading end of the recording paper 6, the leading end of the recording paper 6 is detected by the sensor 15, and the rotation of the drive motor is controlled based on the detection result of the sensor 15. Therefore, by controlling the number of rotations of the drive motor based on the detection result of the sensor 15, the leading end processing of the recording paper 6 can be easily and accurately performed.

At the time of reception, if the size of the original of the received image information is the same size as the recording paper 6, the reception is started immediately, and the received image information is recorded on the recording paper 6 by the thermal head 12. At this time, the motor of the platen roller 11 is rotated forward, and the platen roller 11 is rotated at a speed corresponding to the transmission speed. However, at this time, the solenoid 51 is not energized, and the feed roller 8 and the idle gear 47 are not engaged. Therefore,
The rotational force of the platen roller 11 is not directly transmitted to the feed roller 8, and the feed roller 8 and the pressure roller 9 simply rotate as the recording paper 6 is conveyed by the platen roller 11.

When recording for one page is completed and the recording paper 6 is cut by the cutter unit 28 to a predetermined length, the platen roller 11
And the solenoid 51 is energized, and the recording paper 6 is pulled back to the recording start position where a predetermined leading edge margin is left. At the time of this pulling back, the feed roller 8 is also rotated by the driving force of the motor of the platen roller 11, so that the recording paper 6 is pulled back into the first feeding path 10 without slack.

At the time of reception, if the size of the original of the received image information is different from the size of the recording paper 6 and is of the size of the recording paper 7, the motor of the platen roller 11 is reversed, and the solenoid 51
And the recording paper 6 is pulled back. The leading edge of the recording paper 6 is the first
When it reaches the standby position indicated by Q in the figure, the platen roller
While the motor 11 is stopped, the power supply to the solenoid 51 is stopped, and the recording paper 6 is held between the feed roller 8 and the pressure roller 9 to wait at the Q position. Next, the solenoid 52 is energized to rotate the lever 50 so that the idle gear 48 meshes with the feed roller 60,
The motor of the platen roller 11 is driven to drive the platen roller 11
To rotate forward. With the forward rotation of the platen roller 11, the feed roller 17 rotates forward and the recording paper 7 is conveyed from the standby position P toward the platen roller 11, and is added to the pressure contact between the platen roller 11 and the thermal head 12. Further, the paper is sent in the direction of the cutter unit 28 with a further conveying force. When the sensor 30 detects the leading end of the recording paper 7, the motor of the platen roller 11 is reversed while the solenoid 52 is energized, and the recording paper 7 is pulled back. When the recording paper 7 is pulled back to the recording start position where a predetermined leading edge margin is left, the motor of the platen roller 11 is stopped, and the power supply to the solenoid 52 is also stopped. Therefore, the idle gear 48 is separated from the feed gear 60, and the feed roller 17 is separated from the platen roller 11. Next, similarly to the above, the recording of the image information on the recording paper 7 is started, and the recording paper 7 is conveyed only by the platen roller 11 according to the electric transmission speed.

Thus, the feed roller 8 and the feed roller
17 can be driven by a motor that drives the platen roller 11. Since a motor (for example, a stepping motor) dedicated to the feed roller 8 and the feed roller 17 is not required, the structure of the recording paper supply device can be simplified.
Cost can be reduced. Particularly, in the above embodiment, during recording, the solenoids 51 and 52 are not energized, so that
The energization of the thermal head 12 and the solenoids 51 and 52 does not overlap, the power supply capacity can be reduced, and the cost can be further reduced.

In the above embodiment, the pressure roller 9
Is attached to the lower casing 2, the feed roller 8 and the pressure roller 18 are attached to the arm 22, and the feed roller 17 is attached to the upper casing 3. However, the present invention is not limited to this. And the pressure roller 9 are separated, and the feed roller 17 and the pressure roller 18 are separated so that the passage of the recording papers 6 and 7 is opened. Further, the mounting positions of the sensors 15 and 21 are not limited, and any position may be used as long as the position is appropriate for processing the leading edge of the recording paper and detecting the presence or absence of the processing.

(Effects) According to the first aspect of the present invention, recording paper can be set in the same manner for each open path, and the operation of replacing the recording paper can be made simple and easy.

According to the second aspect of the present invention, the structure of the recording paper supply device can be simplified, and one of the first transport roller pair and the second transport roller of the first transport roller pair can be driven by the driving source of the platen roller. One of the conveying rollers of the roller pair can be rotated, and the cost of the recording paper supply device can be reduced.

Furthermore, according to the third aspect of the present invention, the operation of replacing the recording paper can be made simple and easy, and the position of the leading end of the recording paper can be easily and accurately adjusted.

[Brief description of the drawings]

FIGS. 1 to 4 show an embodiment of the recording paper supply apparatus according to each of the first, second and third aspects of the present invention. FIG. FIG. 2 is an enlarged view of an arm portion of the facsimile apparatus, FIG. 3 is a sectional view of a main part of the power transmission mechanism, and FIG. 4 is a front view of a main part of the power transmission function. 2 ... lower housing, 3 ... upper housing, 4 ... shaft, 5 ... recording paper holder, 5a, 5b ... storage unit, 6, 7 ... recording paper, 8 ... feed roller, 14 ... ... First upper guide section, 15 ... Sensor (first recording paper sensor), 17 ... Feed roller, 20 ... Second lower guide section, 21 ... Sensor (second recording paper sensor), 22 ... Arm , 23… Shaft, 31… Clip, 41… Platen gear, 42… Pulley gear, 42a… Belt pulley, 44… Switching gear, 45… Belt, 47, 48… Idle gear, 49, 50… ... Lever, 51, 52 ... Solenoid, 59, 60 ... Feed gear,

Claims (3)

(57) [Claims] An upper housing and a lower housing which are openably and closably connected via a fulcrum and are capable of storing two roll-shaped recording papers, and selectively supply the recording papers to a platen roller. In the recording paper supply apparatus, a first conveyance path is formed between the upper housing and the lower housing when the lower housing is closed, and is rotatably provided on the lower housing via a fulcrum. An arm portion forming a second conveyance path between the housing and the housing; and a recording paper provided along the first conveyance path while being provided on each of the lower housing and the arm portion, while holding any one of the recording papers And a first conveying roller pair for supplying the recording paper to the platen roller. The recording paper is provided on the upper casing and the arm portion, and the recording paper is supplied to the platen roller along the second conveying path while nipping one of the recording papers. And a second conveying roller pair for supplying. A recording paper supply apparatus, wherein one of the first conveyance roller pair and the second conveyance roller pair rotates alternatively to supply recording paper to a platen roller alternatively. 2. A driving force from a driving source of a platen roller is applied to one of the first conveying roller pair and one of the second conveying roller pair. 2. The recording paper supply device according to claim 1, further comprising a transmission unit that selectively transmits the recording paper. 3. An upper case and a lower case, which are openably and closably connected via a fulcrum and are capable of storing two rolls of recording paper, and selectively supply the recording paper to a platen roller. In the recording paper supply apparatus, a first conveyance path is formed between the upper housing and the lower housing when the lower housing is closed, and is rotatably provided on the lower housing via a fulcrum. An arm portion forming a second conveyance path between the housing and the housing; and a recording paper provided along the first conveyance path while being provided on each of the lower housing and the arm portion, while holding any one of the recording papers And a first conveying roller pair for supplying the recording paper to the platen roller. The recording paper is provided on the upper casing and the arm portion, and the recording paper is supplied to the platen roller along the second conveying path while nipping one of the recording papers. Second feed roller pair to be supplied and lower housing And one of the arm portions,
A first recording paper sensor for detecting the recording paper conveyed along the conveyance path; and a second recording paper sensor provided on one of the upper housing and the arm portion.
A second recording paper sensor for detecting a recording paper conveyed along the conveyance path, and after setting the recording paper, the first conveyance roller pair based on an output result of the first recording paper sensor and the second recording paper sensor. A recording paper supply device for conveying the leading end of the recording paper to a predetermined initial position by selectively rotating a second conveying roller pair.