JPS63226168A - Recorder - Google Patents

Abstract

PURPOSE:To prevent a recording part from being damaged, by setting one of first and second recording sheets between a platen and a recording head when recording is ended. CONSTITUTION:Synchronizing with constant speed conveyance, a recording head 8b is driven and records a received picture to a recording sheet 5, and when recording is ended it is conveyed until the picture end position reaches a cutter 9 and is cut in the same way as the case of a recording sheet 4, then the tip of the recording sheet 5 is rewound to a prescribed awaiting position. Also, a platen roller 8a and a pair of feed rollers 11 are rotated in the forward direction, and the tip of the recording sheet 4 is conveyed to the downstream side from a recording part 8 by margin length l and it is set to awaiting state. In such a way, by allowing the tip of the recording sheet 4 whose use frequency is high to be awaited at the downstream side of the recording part 8 after recording is ended, then recording can be started immediately, when an picture of A4 size is received. In such a way, damage and abrasion of a recording head are prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a recording device that uses a plurality of rolled recording sheets, for example, a recording device for a facsimile machine or a printer device.

[Prior Art] Conventionally, as a recording device that stores a plurality of recording sheets,
For example, there is a so-called double roll type device that stores two sheet rolls.

This device has the advantage of being able to store recording sheets of different sizes and record on the recording sheet that matches the received size.

[Problems to be Solved by the Invention] However, since the conventional double roll type recording device described above transports the recording sheet to the recording section according to the received image information, the recording sheet is The leading edge is rewound to a standby position set on the downstream side of the printing position of the recording unit in the sheet conveyance direction, in preparation for the next communication.

Therefore, once the recording of one communication is completed, the platen roller and the recording head forming the recording section are left in direct pressure contact for a long time until the next recording begins.

For this reason, changes in temperature or humidity within the device can cause the platen roller and recording head to stick together, and if the platen roller is rotated in this state, the recording head may be damaged or the platen roller may become deformed. there were.

In addition, if you frequently use only one recording sheet out of the two stored sheet rolls, move the recording sheet back and forth from the sheet leading edge standby position to the recording section each time recording for one communication starts and ends. It is a useless operation to make it work,
In addition, there have been problems such as a jam occurring when the leading edge of the recording sheet enters the recording section.

The present invention solves the above-mentioned conventional problems and provides a recording method that prevents damage to the recording section and that does not cause the recording sheet to make unnecessary movements during recording.

[Means for Solving the Problems] The present invention provides that when recording on a recording sheet is completed, the first
, one of the second recording sheets is set between the platen and the recording head.

[Operation] According to the present invention, when recording on the recording sheet is completed, the first
Since one of the second recording sheets is set between the platen and the recording head, the two are not left in direct pressure contact for a long time, and the frequently used recording sheet can be placed in a standby state. By doing so, you can immediately start recording on the recording sheet and eliminate unnecessary operations.

[Embodiment] Next, an embodiment in which the above means is applied to a double roll type facsimile machine will be described.

FIG. 1 is a perspective explanatory view of the first housing A and the second housing B in an open state, FIG. 2 is a cross-sectional explanatory view thereof, and the third
The figure is an explanatory cross-sectional view when both the housings are closed.

In the figure, a first casing A serving as the main body of the device and a second casing B serving as its lid are pivotally attached to each other by a shaft 1, and are configured to be openable and closable around the shaft 1.

Further, a spring 2 is provided on the shaft 1 serving as the center of rotation, and hooks 3 are provided on the open ends of the casings A and H to lock each other, and when the hooks 3 are released from the lock, Said spring 2
The structure is such that the second casing B is released from the first casing A by the biasing force.

In the first housing A, there are two drop-in roll holders 6.7 that can individually store sheet rolls 4a and 5a of various sizes in which recording sheets 4.5 are wound into rolls.
They are arranged in parallel.

Recording sheet 4.5 stored in this roll holder 6.7
Either one is conveyed to the recording unit 8 in response to a selection signal from the control unit, a predetermined image is recorded in the recording unit 8, and the recorded recording sheet is cut after the image by a cutter 9 provided in the first housing A. It is cut from the end, and also the first casing A
It is configured to be discharged to the outside of the apparatus by a pair of discharge rollers IO provided in the apparatus.

The recording section 8 includes a platen roller 8a that conveys the recording sheet 4.5 at a constant speed, and a platen roller 8a that heats the recording sheet made of a heat-sensitive sheet according to image information by pressing against the platen roller 8a as shown in FIG. A line-type recording head 8b. The platen roller 8a is disposed in the first casing A, the recording head 8b is disposed in the second casing B, and a suppression spring 8C is attached to the back of the recording head when the TI4 casing B is closed. The structure is such that the two come into pressure contact with each other.

The recording sheets 4.5 are each conveyed to the recording section 8 by a pair of feed rollers serving as feed members, and the roll holder (hereinafter referred to as "first holder") which is closer to the recording section
A sheet guide 1 is disposed between the feed roller pair 11 that conveys the recording sheet 4 stored in the platen roller 8a and the platen roller 8a.
A sheet presence/absence detection sensor 13a and a sheet width detection sensor 13b are provided via 2. Also, a pair of feed rollers 1 conveys the recording sheet 5 stored in the roll holder (hereinafter referred to as "second holder") 7 that is farther from the recording unit 8.
4 is the second casing B side and is provided between the recording head 8b and the second holder 7, and a sheet presence/absence sensor (for example, , a reflective sensor) 16a and a sheet width detection sensor (for example, a reflective sensor) 16b.

Further, the feed roller pair 11, 14 and the platen roller 8a are configured to be driven and controlled by motors lla, llb and 17, respectively, which are driven by signals from the CPU, as shown in FIG.

Note that 18 in FIGS. 2 and 3 is a document transport system, which is placed on a document storage stand 18a formed on the top surface of the second housing B, and guided on both sides by document side guides 18b. The originals 19 are separated one by one by a separation roller 18c, are transported at a constant speed to the left side of the drawing by a transport roller 18d, and are transferred to a discharge tray 18f by a discharge roller 18e.
It is composed of every discharge.

Further, while the original 19 is being conveyed, light is irradiated from the light source 20a of the original reading system 20, and the reflected light reaches an image reading element 20d such as a CCD via a plurality of mirrors 20b and a lens 20c. It is configured such that an image is read and the image information is transmitted to a predetermined recording system.

Next, the operation of the apparatus configured as described above will be explained.

First, to set the sheet roll, release the hook 3, open the second casing B, store the frequently used A4 size sheet roll 4a in the first holder 6, and feed the leading edge of the sheet. Pass it between the pair of rollers 11 and reach near the tip of the sheet guide 12. Similarly, the second holder 7 stores, for example, an A3 size sheet roll 5a which is rarely used, and its leading end is passed between the pair of feed rollers 14 to reach near the leading end of the sheet guide 15. In addition, the frequency of use is based on the sheet roll 4a.
, 5a are set using the changeover switch 21 shown in FIG.

After setting the sheet roll as described above, the second housing B is closed and a manual cutting operation is performed. This operation is performed after the sheet presence/absence detection sensors 13a, 16a detect that the sheet rolls 4a, 5a are stored.

That is, when the manual cart switch is operated, the sensors 13a and 16a cause the recording sheet 4.
5, the feed roller 11 and platen roller 8a on the side of the recording sheet 4 rotate in the direction of the arrow in FIG. Cut the rear end of recording sheet 4. Further, the cut recording sheet 4 is discharged out of the apparatus, and the platen roller 8a and the feed roller pair 11 are rotated in the opposite direction to the above, so that the leading edge of the recording sheet 4 is positioned downstream of the sheet presence/absence detection sensor 13a. It is rewound to a position upstream of the recording section 8 and put into a standby state.

Next, the leading edge of the recording sheet 5 is cut by driving the feed roller pair 14, platen roller 8a, and cutter 9 in the same manner as described above.

Further, the cut recording sheet 5 is discharged to the outside of the apparatus, and the platen roller 8a and the feed roller pair 1 are
4 in the opposite direction to the above, the leading edge of the recording sheet 5 is positioned downstream of the sheet presence/absence detection sensor 16a and in the recording section 8.
The machine is rewound to a position upstream of the machine and placed in a standby state.

Thereafter, the frequently used recording sheet 4 is returned to the recording position.

The manual cutting operation makes the leading edge of the recording sheet 4.5 neat, and by controlling the amount of rotation of the platen roller 8a and the pair of feed rollers 11.14, the leading edge of the recording sheet is brought to an accurate standby position. Further, since the frequently used recording sheet 4 is located downstream of the printing position 8d of the recording section 8, there is no unnecessary movement of the recording sheet 4 when recording is performed on the recording sheet 4. Furthermore, in the standby state, the recording sheet 4 between the platen roller 8a and the recording pad 8b is interposed, and the two are not in direct pressure contact, so even if the platen roller 8a and the recording pad 8b are left in the standby state for a long time, the platen roller 8a and the recording pad 8b are not in contact with each other. It doesn't stick to 8b.

Next, when recording, the frequently used A4 size image information (in the case of copy mode, it is the information read by the league provided on the main unit, and in the case of reception mode, it is the information sent from the facsimile device of the sender) ), the sheet width detection sensor 13b detects that the width of the recording sheet 4 is A4 size, and each member operates at the timing shown in FIG. 6(A).

That is, the platen roller 8a rotates in the direction of the arrow in FIG. 3 (hereinafter referred to as "forward direction") to convey the recording sheet 4 at a constant speed. In synchronization with this conveyance, the recording head 8b generates heat according to the image information, and the received image is recorded on the recording sheet 4 by the heat generated. At this time, the feed roller pair 11 rotates as the recording sheet 4 is conveyed.

When the recording of the received image is completed as described above, the recording sheet 4 is conveyed until the trailing edge of the image reaches the cutter 9 and cut, and the recorded recording sheet is discharged out of the apparatus by a pair of discharge rollers 10. , the platen roller 8a and the feed roller pair 11 are moved in the direction opposite to the arrow in FIG.
(referred to as "reverse direction"), and rotate the leading edge of the recording sheet 4 in the fifth direction.
As shown in Figure (A), rewind to a position downstream from the printing position by the length of the leading edge margin of the recording sheet and put it in a standby state.
Finish recording A4 size reception.

Here, the drive of the pair of feed rollers 11 and the platen roller 8a is controlled by a control section, and as shown in FIG. The motor 17 is driven. At this time, the number of rotation steps of the motor 17 is calculated by a step pulse calculation circuit, and the amount of rotation is controlled based on the number of steps. That is, when the motor 17 is sequentially rotated, whether or not the trailing edge of the recorded image has been conveyed from the recording section 8 to the cuff lid position after recording is completed is detected by counting the number of rotation steps of the motor 17, and the motor 17 is rotated. When rotating in the opposite direction, the leading edge of the sheet moves from the cuff lid position to the recording section 8.
It is detected in the same manner as described above whether or not the motor 17 has been rewound to the downstream standby position, and the CPU drives, stops, and controls the speed of the motor 17 in accordance with signals from the step pulse calculation circuit.

Next, if A3 size image information is received while the recording sheet 4 is in the above-mentioned standby state, the sheet width detection sensor 1
6b detects that the recording sheet 5 is of A3 size, the recording sheet 4 and the recording sheet 5 are exchanged at the timing shown in FIG. 6(B), and A3 size recording is performed on the recording sheet 5.

That is, the platen roller 8a and the feed roller pair 11 are rotated in opposite directions, and the leading edge of the recording sheet 4 is rotated in the direction shown in FIG.
As shown in B), the sheet is rewound to a predetermined position downstream of the sheet presence/absence detection sensor 13a and upstream of the recording section 8, and placed in a standby state.

Next, the feed roller pair 14 and the platen roller 8a are rotated in the forward direction to convey the recording sheet 5 to the recording section 8. When the leading edge of the recording sheet 5 is conveyed downstream by the margin length from the printing position 8d where the platen roller 8a and the recording pad 8b are in pressure contact, as shown in FIG. 5(C),
The drive of the feed roller pair 14 is stopped, and the recording sheet 5 is conveyed at a constant speed by the platen roller 8a. At this time, the feed roller pair 14 rotates as the recording sheet 5 is conveyed.

Then, in synchronization with the above-mentioned constant speed conveyance, the recording radar 8b is driven to record the received image on the recording sheet 5, and when recording is completed, the trailing edge position of the image reaches the cutter 9 as in the case of the recording sheet 4. The leading edge of the recording sheet 5 is then rewound to a predetermined standby position as shown in FIG. 5(B). Further, the platen roller 8a and the feed roller pair 11 are rotated in the forward direction, and the leading edge of the recording sheet 4 is rotated as shown in FIG.
As shown in A), the paper is transported downstream from the recording unit 8 by the length of the margin and placed in a standby state.

As mentioned above, recording sheet 4 is frequently used after recording is completed.
If you set the tip to wait on the downstream side of the recording section 8,
Recording can be started immediately when an A4 size image is received.

[Other Embodiments] In the above-mentioned embodiments, recording of A3 size was explained in the case where only one received image was received, but when recording a plurality of A3 size received images in succession, one Every time recording is completed, the trailing edge image of the recording sheet 5 is conveyed to the cutter 9 position and cut, and when rewinding, the platen roller 8a and the pair of feed rollers 14 rotate in the opposite direction to cut the trailing edge image of the recording sheet 5. As shown in FIG. 5(C), the leading end is rewound to a position downstream of the printing position 8d of the recording section 8 by the length of the margin. Then, the driving of the feed roller pair 14 is stopped, and the platen roller 8a is rotated in the forward direction to start recording the next page. This is repeated, and when the recording of the last page is completed, the state is changed to the state shown in FIG. If this is done, there will be no waste in conveying the recording sheet 5.

Furthermore, in the above embodiment, the first holder 6 stores the A4 size sheet roll 4a, and the second holder 7 stores the A3 size sheet roll 5a, but it is difficult to determine which size sheet roll is stored in which holder. In that case, the selection of the frequently used recording sheet, that is, which recording sheet is to be kept on standby downstream of the printing position 8d of the recording section, is specified by the changeover switch 21 as shown in FIG. Just do it.

Furthermore, it is not necessary to limit the number of sheet rolls stored in the apparatus to two as in the above-mentioned embodiment. It is possible to make it.

Furthermore, the recording section 8 does not have to be composed of a recording head and a platen roller as described above, but may be composed of an inkjet system, for example.

FIG. 8 is a flowchart showing the operation of another embodiment of the present invention.

First, the leading edge of a recording sheet of a predetermined width is set at a recording position (S1), and the width (L) of the recording sheet set at the recording position is set in a memory (S2). Then, it waits until there is a recording start request (S3), and if there is a recording start request, the recording sheet width information (Ll) is detected based on DC3 (S4).

If the width of the recording sheet set at the recording position is the same as the recording sheet width information L1 (S5), recording is immediately performed (S7).

On the other hand, if the width L of the recording sheet set in the recording position differs from the recording sheet width L1 to be recorded (S5), the already set recording sheet is returned to the standby position, and the recording sheet having the width LL is Set the tip to the recording position S6
), recording starts (S7).

After the recording is completed, the leading edge of the recorded recording sheet is held at the recording position (S8), and the width (new L) of the recording sheet set at the recording position is set in the memory (S8).
S9). Then, it waits until a recording start request is received.

FIG. 9 is a flowchart showing the operation of still another embodiment of the present invention.

The difference between the flowchart shown in FIG. 9 and the flowchart shown in FIG. 8 is that S1 is replaced with S8 in FIG.
8. S19 is provided.

That is, after recording is completed (S17), it is determined whether the width of the recording sheet used at the time of recording is the same as the width of the previously selected recording sheet (318).
. If the width of the image recording sheet is different, the recording sheet used for the above recording is rotated in the opposite direction and returned to the standby position.
A pre-selected recording sheet is advanced downstream and its leading edge is set at the recording position (S19). Set the width of the recording sheet newly set at the recording position in memory (
S20). If the width of the recording sheet on which recording was performed and the width of the previously selected recording sheet are the same (318)
, the recording sheet used during recording is kept set at the recording position (S20).

Note that 5ll-317 in FIG. 9 is the same as S1 to S7 in FIG. 8, and S9 is the same as S20.

Note that the recording sheet includes, for example, a plastic sheet and plain paper in addition to thermal paper.

Further, the present invention is not limited to the thermal recording method shown in the embodiments, but can also be applied to a recording apparatus using, for example, a so-called thermal transfer recording method using an ink sheet. Further, the platen is not limited to a roller, but may be a plate-shaped one, for example. In this case, other sheets may be conveyed by other rollers or the like.

[Effects of the Invention] According to the present invention, even if the recording section is constructed by pressing the platen and the recording head, the recording sheet is interposed between them, and the platen roller and the recording head are in direct pressure contact for a long time. Since the recording head is not left unused for a long time, it has the effect of preventing damage and wear to the recording head.

[Brief explanation of the drawing]

FIG. 1 is a perspective explanatory view of a state in which the first casing A and the second casing B are opened. FIG. 2 is an explanatory cross-sectional view thereof. FIG. 3 is an explanatory cross-sectional view when both toilet bodies are closed. FIG. 4 is a flowchart showing the operation of the above embodiment. FIG. 7 is a block diagram showing the control configuration of the drive system. FIGS. 5A, 5B, and 5C are explanatory diagrams of the conveyance state of the recording sheet. FIGS. 6A and 6B are timing charts of the operating states of each member during recording. FIG. 8 is a flowchart showing the operation of another embodiment of the present invention. FIG. 9 is a flowchart showing the operation of still another embodiment of the present invention. 4.5... Recording sheet, 8... Recording section, 8a... Platen roller, 8b... Recording head, 11... Feed roller pair, 13a, 16a... Sheet presence/absence detection sensor, 13b ,
16b...Sheet width detection sensor, 14...Feed roller pair, Patent applicant: Canon Co., Ltd. Agent Arata Yokubo - Figure 5 (A) Figure 5 (S) Figure 5 (C) B, /- Procedural amendment August 28, 1988 Kunio Ogawa, Commissioner of the Patent Office 2) Invention name recording device 3, relationship to the case of the person making the amendment Patent applicant address 3-30 Shimomaruko, Ota-ku, Tokyo No. 2 Name (ioo) Representative of Canon Co., Ltd.
Ryu Sanbe 4, Agent Address: 16-105 Tomiku-cho, Shinjuku-ku, Tokyo 162
Date of amendment order Voluntary amended specification 1, name of invention recording device 2) Claims (1) First and second recording sheets wound in a roll are stored, and a recording unit equipped with a recording head records the above-mentioned information. A recording device that selectively conveys a first and a second recording sheet and records an image according to image information on the selected recording sheet, wherein when recording on the recording sheet is completed, the first recording sheet ,
A recording apparatus characterized in that one of the second recording sheets is set between the platen and the recording head. (2) In claim 1, the recording sheet set between the platen and the recording head is
A recording device characterized in that the recording sheet is the recording sheet that was being recorded immediately before. (3) In claim 1, the recording sheet set between the platen and the recording head is
A recording device characterized by a frequently used recording sheet. (4) In claim 1, a recording sheet set between the platen and the recording head,
A recording apparatus characterized in that a user can arbitrarily select one of the first and second recording sheets. 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a recording device that uses a plurality of rolled recording sheets, such as a recording device for a facsimile machine or a printer device. [Prior Art] Conventionally, as a recording device that stores a plurality of recording sheets,
For example, there is a so-called double roll type device that stores two sheet rolls. This device has the advantage of being able to store recording sheets of different sizes and record on the recording sheet that matches the received size. [Problems to be Solved by the Invention] However, the conventional double roll type recording device described above transports the recording sheet to the recording section according to the received image information, so when recording for one communication is completed, the recording sheet is The leading edge is rewound to a standby position set upstream of the printing position of the recording unit in the sheet conveyance direction, in preparation for the next communication. Therefore, once the recording of one communication is completed, the platen roller and the recording head forming the recording section are left in direct pressure contact for a long time until the next recording begins. For this reason, changes in temperature or humidity within the device can cause the platen roller and recording head to stick together, and if the platen roller is rotated in this state, the recording head may be damaged or the platen roller may become deformed. there were. In addition, if you frequently use only one recording sheet out of the two stored sheet rolls, move the recording sheet back and forth from the sheet leading edge standby position to the recording section each time recording for one communication starts and ends. It is a useless operation to make it work,
In addition, there have been problems such as a jam occurring when the leading edge of the recording sheet enters the recording section. The present invention solves the above-mentioned conventional problems and provides a recording method that prevents damage to the recording section and that does not cause the recording sheet to make unnecessary movements during recording. [Means for Solving the Problems] The present invention provides that when recording on a recording sheet is completed, the first
, one of the second recording sheets is set between the platen and the recording head. [Operation] According to the present invention, when recording on the recording sheet is completed, the first
Since one of the second recording sheets is set between the platen and the recording head, the two are not left in direct pressure contact for a long time, and the frequently used recording sheet can be placed in a standby state. By doing so, you can immediately start recording on the recording sheet and eliminate unnecessary operations. [Embodiment] Next, an embodiment in which the above means is applied to a double roll type facsimile machine will be described. FIG. 1 is a perspective explanatory view of the first housing A and the second housing B in an open state, FIG. 2 is a cross-sectional explanatory view thereof, and the third
The figure is an explanatory cross-sectional view when both the housings are closed. In the figure, a first casing A serving as the main body of the device and a second casing B serving as its lid are pivotally attached to each other by a shaft 1, and are configured to be openable and closable around the shaft 1. Further, a spring 2 is provided on the shaft l serving as the center of rotation, and hooks 3 are provided at the open ends of the casings A and B to lock each other, and when the hooks 3 are released from the lock, Said spring 2
The second casing B is configured to be released from the first casing A by the urging of the second casing B. In the first housing A, there are two drop-in roll holders 6.7 that can individually store sheet rolls 4a and 5a of various sizes in which recording sheets 4.5 are wound into rolls.
It is provided in the individual row. Recording sheet 4.5 stored in this roll holder 6.7
Either one is conveyed to the recording unit 8 in response to a selection signal from the control unit, a predetermined image is recorded in the recording unit 8, and the recorded recording sheet is cut after the image by a cutter 9 provided in the first housing A. It is cut from the end, and also the first casing A
It is configured to be discharged to the outside of the apparatus by a pair of discharge rollers IO provided in the apparatus. The recording section 8 includes a platen roller 8a that conveys the recording sheet 4.5 at a constant speed, and a platen roller 8a that heats the recording sheet made of a heat-sensitive sheet according to image information by pressing against the platen roller 8a as shown in FIG. It is composed of a line type recording head 8b. The platen roller 8a is disposed in the first casing A, the recording head 8b is disposed in the second casing B, and when both casings A and B are closed, a pressing spring is attached to the back of the recording head. 8C so that the two are brought into pressure contact. The recording sheets 4.5 are each conveyed to the recording section 8 by a pair of feed rollers serving as feed members, and the roll holder (hereinafter referred to as "first holder") which is closer to the recording section
A sheet guide 1 is disposed between the feed roller pair 11 that conveys the recording sheet 4 stored in the platen roller 8a and the platen roller 8a.
A sheet presence/absence detection sensor 13a and a sheet width detection sensor 13b are provided via 2. Also, a pair of feed rollers 1 conveys the recording sheet 5 stored in the roll holder (hereinafter referred to as "second holder") 7 that is farther from the recording unit 8.
Reference numeral 4 is provided on the second housing B side between the recording head 8b and the second holder 7, and a sheet presence/absence sensor (for example, , a reflective sensor) 16a and a sheet width detection sensor (for example, a reflective sensor) 16b. Further, the feed roller pair 11, 14 and the platen roller 8a are configured to be driven and controlled by motors 11a, 11b and 17, respectively, which are driven by signals from the CPU, as shown in FIG. Reference numeral 18 in FIGS. 2 and 3 denotes a document transport system, which is placed on a document table 18a formed on the top surface of the second housing B, and guided on both sides by document side guides 18b. The originals 19 are separated one by one by a separation roller 18c, are transported at a constant speed to the left side of the drawing by a transport roller 18d, and are transferred to a discharge tray 18f by a discharge roller 18e.
It is structured so that it is discharged. Further, while the original 19 is being conveyed, it is irradiated with light from the light 1i 20a of the original reading system 20, and the reflected light reaches an image reading element 20d such as a COD via a plurality of mirrors 20b and a lens 20c, and then reaches the image reading element 20d such as a COD. 19 images are read and the image information is transmitted to a predetermined recording system. Next, the operation of the apparatus configured as described above will be explained. First, to set the sheet roll, release the hook 3, open the second casing B, store the frequently used A4 size sheet roll 4a in the first holder 6, and feed the leading edge of the sheet. Pass it between the pair of rollers 11 and reach near the tip of the sheet guide 12. Similarly, the second holder 7 stores, for example, an A3 size sheet roll 5a which is rarely used, and its leading end is passed between the pair of feed rollers 14 to reach near the leading end of the sheet guide 15. In addition, the frequency of use is based on the sheet roll 4a.
, 5a are set using the changeover switch 21 shown in FIG. After setting the sheet rolls as described above, the second housing B is closed and a manual cutting operation is performed.This operation first detects that the sheet rolls 4a and 5a are stored by the sheet presence/absence detection sensors 13a and 16a. Do this after detection. That is, when the recording sheet 4.5 is detected by the sensors 13a and 16a when the manual cut switch is operated, the feed roller 11 on the recording sheet 4 side is first
The platen roller 8a rotates in the direction of the arrow in FIG.
The recording sheet 4 is conveyed to O, and the rear end of the recording sheet 4 is cut with a cutter 9. Further, the cut recording sheet 4 is discharged out of the apparatus, and the platen roller 8a and the feed roller pair 11 are rotated in the opposite direction to the above, so that the leading edge of the recording sheet 4 is positioned downstream of the sheet presence/absence detection sensor 13a. It is rewound to a position upstream of the recording section 8 and put into a standby state. Next, the leading edge of the recording sheet 5 is cut by driving the feed roller pair 14, platen roller 8a, and cutter 9 in the same manner as described above. Further, the cut recording sheet 5 is discharged to the outside of the apparatus, and the platen roller 8a and the feed roller pair 1 are
4 in the opposite direction to the above, the leading edge of the recording sheet 5 is positioned downstream of the sheet presence/absence detection sensor 16a and in the recording section 8.
The machine is rewound to a position upstream of the machine and placed in a standby state. Thereafter, the frequently used recording sheet 4 is returned to the recording position. O By the manual cutting operation described above, the leading edge of the recording sheet 4.5 is made clean, and by controlling the amount of rotation of the platen roller 8a and the pair of feed rollers 11.14, the leading edge of the recording sheet is brought to an accurate standby position. Further, since the frequently used recording sheet 4 is located downstream of the printing position 8d of the recording section 8, there is no unnecessary movement of the recording sheet 4 when recording is performed on the recording sheet 4. Furthermore, in the standby state, the recording sheet 4 between the platen roller 8a and the recording head 8b is interposed and the two are not in direct pressure contact, so even if the platen roller 8a and the recording head 8b are left in the standby state for a long time, the platen roller 8a and the recording head 8b are It doesn't seem to stick. Next, when recording, the frequently used A4 size image information (in the case of copy mode, it is the information read by the league provided on the main unit, and in the case of reception mode, it is the information sent from the facsimile device of the sender) ), the sheet width detection sensor 13b detects that the width of the recording sheet 4 is A4 size, and each member operates at the timing shown in FIG. 6(A). That is, the platen roller 8a rotates in the direction of the arrow in FIG. 3 (hereinafter referred to as "forward direction") to convey the recording sheet 4 at a constant speed. In synchronization with this conveyance, the recording pad 8b generates heat according to the image information, and the received image is recorded on the recording sheet 4 by the heat generated. At this time, the feed roller pair 11 rotates as the recording sheet 4 is conveyed. When the recording of the received image is completed as described above, the recording sheet 4 is conveyed until the trailing edge of the image reaches the cutter 9 and cut, and the recorded recording sheet is discharged out of the apparatus by a pair of discharge rollers 10. , the platen roller 8a and the feed roller pair 11 are moved in the direction opposite to the arrow in FIG.
(referred to as "reverse direction"), and rotate the leading edge of the recording sheet 4 in the fifth direction.
As shown in Figure (A), rewind to a position downstream from the printing position by the length of the leading edge margin of the recording sheet and put it in a standby state.
Finish recording A4 size reception. Here, the drive of the pair of feed rollers 11 and the platen roller 8a is controlled by a control section, and as shown in FIG. The motor 17 is driven. At this time, the number of rotation steps of the motor 17 is calculated by a step pulse calculation circuit, and the amount of rotation is controlled based on the number of steps. That is, when the motor 17 is rotated sequentially, whether or not the trailing edge of the recorded image has been conveyed from the recording section 8 to the camp 9 position after recording is completed is detected by counting the number of rotation steps of the motor 17. When rotating in the opposite direction, the leading edge of the sheet moves from the cam position 9 to the recording section 8.
It is detected in the same manner as described above whether or not the motor 17 has been rewound to the downstream standby position, and the CPU drives, stops, and controls the speed of the motor 17 in accordance with signals from the step pulse calculation circuit. Next, if A3 size image information is received while the recording sheet 4 is in the above-mentioned standby state, the sheet width detection sensor 1
6b detects that the recording sheet 5 is A3 size, the recording sheet 4 and the recording sheet 5 are exchanged at the timing shown in FIG. 6(B), and A3 size recording is performed on the recording sheet 5. That is, the platen roller 8a and the feed roller pair 11 are rotated in opposite directions, and the leading edge of the recording sheet 4 is rotated in the direction shown in FIG.
As shown in B), the sheet is rewound to a predetermined position downstream of the sheet presence/absence detection sensor 13a and upstream of the recording section 8, and placed in a standby state. Next, the feed roller pair 14 and the platen roller 8a are rotated in the forward direction to convey the recording sheet 5 to the recording section 8. When the leading edge of the recording sheet 5 is conveyed downstream by the margin length from the printing position 8d where the platen roller 8a and the recording head 8b are in pressure contact as shown in FIG. 5(C),
The drive of the feed roller pair 14 is stopped, and the recording sheet 5 is conveyed at a constant speed by the platen roller 8a. At this time, the feed roller pair 14 rotates as the recording sheet 5 is conveyed. Then, in synchronization with the above-mentioned constant speed conveyance, the recording radar 8b is driven to record the received image on the recording sheet 5, and when recording is completed, the trailing edge position of the image reaches the cutter 9 as in the case of the recording sheet 4. The leading edge of the recording sheet 5 is then rewound to a predetermined standby position as shown in FIG. 5(B). Further, the platen roller 8a and the feed roller pair 11 are rotated in the forward direction, and the leading edge of the recording sheet 4 is rotated as shown in FIG.
As shown in A), the paper is transported downstream from the recording unit 8 by the length of the margin and placed in a standby state. As mentioned above, recording sheet 4 is frequently used after recording is completed.
If you set the tip to wait on the downstream side of the recording section 8,
Recording can be started immediately when an A4 size image is received. [Other Embodiments] In the above-mentioned embodiments, recording of A3 size was explained in the case where only one received image was received, but when recording a plurality of A3 size received images in succession, one Every time recording is completed, the trailing edge image of the recording sheet 5 is conveyed to the cutter 9 position and cut, and when rewinding the next time, the platen roller 8a and the pair of feed rollers 14 rotate in the opposite direction to cut the trailing edge image of the recording sheet 5. As shown in FIG. 5(C), the leading end is rewound to a position downstream of the printing position 8d of the recording section 8 by the length of the margin. Then, the driving of the feed roller pair 14 is stopped, and the platen roller 8a is rotated in the forward direction to start recording the next page. This is repeated, and when the recording of the last page is completed, the state is changed to the state shown in FIG. If this is done, there will be no waste in conveying the recording sheet 5. Furthermore, in the above embodiment, the first holder 6 stores the A4 size sheet roll 4a, and the second holder 7 stores the A3 size sheet roll 5a, but it is difficult to determine which size sheet roll is stored in which holder. In that case, the selection of the frequently used recording sheet, that is, which recording sheet is to be kept on standby downstream of the printing position 8d of the recording section, is specified by the changeover switch 21 as shown in FIG. Just do it. Furthermore, it is not necessary to limit the number of sheet rolls stored in the apparatus to two as in the above-mentioned embodiment. It is possible to make it. Furthermore, the recording section 8 does not have to be composed of a recording head and a platen roller as described above, but may be composed of an inkjet system, for example. FIG. 7 is a diagram showing the control configuration of the drive system. The control configuration of this drive system is controlled by the CPU 50. NCU 31, modem 52) data control section 53, modem control section 54, RO
M55. It has a RAM 56, an operation control section 61, a drive control section 63, a driver 64, and a recording section m section 65. The apparatus also includes a changeover switch 21, recording sheet presence detection sensors 13a and 16a, a cover switch 70, recording sheet width detection sensors 13b and 16b, a recording motor 17, feed motors llb and llb, and a recording head 8b. FIG. 8 is a flowchart showing the operation of another embodiment of the present invention. First, the leading edge of a recording sheet of a predetermined width is set at a recording position si), and the width (L) of the recording sheet set at the recording position is set in a memory (S2). Then, it waits until a recording start request is received (S3), and if there is a recording start request, recording sheet width information (Ll) is detected based on DOS (S4). If the width of the recording sheet set at the recording position is the same as the recording sheet width information L1 (S5), recording is immediately performed (S7). On the other hand, if the width of the recording sheet set in the recording position differs from the recording sheet width L1 to be recorded (S5), the already set recording sheet is returned to the standby position, and the recording sheet having the width Ll is Set the tip to the recording position S6
), recording starts (S7). After the recording is completed, the leading edge of the recorded recording sheet is held at the recording position (Sa), and the radius (new L) of the recording sheet set at the recording position is set in the memory (Sa).
S9). Then, it waits until a recording start request is received. FIG. 9 is a flowchart showing the operation of still another embodiment of the present invention. The difference between the flowchart shown in FIG. 9 and the flowchart shown in FIG. 8 is that S1 is replaced with S8 in FIG.
8. This is because S19 is provided. That is, after recording is completed (S17), it is determined whether the width of the recording sheet used at the time of recording is the same as the width of the previously selected recording sheet (318).
. If the width of the re-recording sheet is different, the recording sheet used for the above recording is rotated in the opposite direction and returned to the standby position.
A pre-selected recording sheet is advanced downstream and its leading edge is set at the recording position (S19). Set the width of the recording sheet newly set at the recording position in memory (
S20). If the width of the recording sheet on which recording was performed and the width of the pre-selected recording sheet are the same (stg),
The recording sheet used during recording is kept set at the recording position (S20). Note that 5ll-317 in FIG. 9 is the same as 51 to S7 in FIG. 8, and S9 is the same as 320. Note that the recording sheet includes, for example, a plastic sheet and plain paper in addition to thermal paper. Further, the present invention is not limited to the thermal recording method shown in the embodiments, but can also be applied to a recording apparatus using, for example, a so-called thermal transfer recording method using an ink sheet. Further, the platen is not limited to a roller, but may be a plate-shaped one, for example. In this case, other sheets may be conveyed by other rollers or the like. [Effects of the Invention] According to the present invention, even if the recording section is constructed by pressing the platen and the recording head, the recording sheet is interposed between them, and the platen roller and the recording head are in direct pressure contact for a long time. Since it is not left unused for a long time, it has the effect of preventing damage and wear to the recording head. 4. Brief Description of the Drawings FIG. 1 is a perspective explanatory view of a state in which the first casing A and the second casing B are opened. FIG. 2 is an explanatory cross-sectional view thereof. FIG. 3 is an explanatory cross-sectional view when both housings are closed. FIG. 4 is a flowchart showing the operation of the above embodiment. FIGS. 5A, 5B, and 5C are explanatory diagrams of the conveyance state of the recording sheet. FIGS. 6A and 6B are timing charts of the operating states of each member during recording. FIG. 7 is a block diagram showing the control configuration of the drive system. FIG. 8 is a flowchart showing the operation of another embodiment of the present invention. FIG. 9 is a flowchart showing the operation of still another embodiment of the present invention. 4.5...Record sheet. 8... Recording department. 8a...Platen roller. 8b... Recording head, 11... Feed roller pair, 13a, 16a... Sheet presence/absence detection sensor, 13b,
16b... Sheet width detection sensor, 14... Feed roller pair,

Claims (4)

[Claims] (1) Store first and second recording sheets wound into a roll, selectively convey the first and second recording sheets to a recording section equipped with a recording head, and image the selected recording sheets. A recording device that records an image according to information, wherein when recording on the recording sheet is completed, the first,
A recording apparatus characterized in that one of the second recording sheets is set between the platen and the recording head. (2) The recording apparatus according to claim 1, wherein the recording sheet set between the platen and the recording head is the recording sheet that was used for recording immediately before. (3) The recording apparatus according to claim 1, wherein the recording sheet set between the platen and the recording head is a frequently used recording sheet. (4) In claim 1, the user can arbitrarily select a recording sheet to be set between the platen and the recording head from the first and second recording sheets. A recording device characterized by: