JPS62264149A - Recording device - Google Patents

Abstract

PURPOSE:To house two recording sheets and make a recording device compact by constituting primary and secondary chest structures to be capable of opening and closing, making the primary chest structure capable of housing two sheet rolls, and providing each feed member separately in said chest structures and a control part for the rotary speed of a platen. CONSTITUTION:A primary chest structure 'A' and a secondary chest structure 'B' are so constituted as to be capable of opening and closing. The primary chest structure 'A' is provided with two roller holders 6 and 7, and recording sheet rollers 4a and 4b of different sizes are housed respectively in each roller holder. Also, the chest structures 'A' and 'B' are respectively fitted with a set of feed rollers 11 and 14. According to the aforesaid constitution, it becomes possible to record on a sheet suitable for the size of image information. Also, a control part delays the rotary speed of a platen 8a before the arrival of a recording sheet, or when a recording head 8b and the platen 8a are directly in press contact with each other, thereby enabling the generation of large rotary torque without any use of a large-sized motor. As a result, the whole of the device can be made compact.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a recording device that can accommodate two recording sheet rolls.

<Prior art> Conventional desktop type recording devices such as facsimiles and printers store one sheet roll of a predetermined size made by winding recording sheets into a roll, and feed out the recording sheets one after another. The system is configured to record received image information while

<Problems to be Solved by the Invention> However, in the apparatus with the above configuration, if the set recording sheet is, for example, A4 size, when receiving and recording 84 size image information, this is not necessary. It is necessary to reduce the size and record it. On the other hand, when a B4 size recording sheet is set and A4 size image information is received and recorded, there is a problem in that a blank space is generated on the recording sheet.

To solve the above problem, there was a so-called double roll type device that could store two sheet rolls, but conventional devices of this type were large console types, and the method for setting recording sheets was difficult. It was complicated and not easy to use.

Furthermore, in the case of the above-mentioned double roll type apparatus, during recording, the platen roller rotates in a state in which it is in direct pressure contact with the recording head until the leading edge of the recording sheet reaches the recording section. Therefore, the rotational torque of the platen roller is larger than that required when the recording sheet is conveyed between the roller and the recording head (during recording), which creates the problem of having to provide a large motor as a driving means. there were.

The present invention solves the above-mentioned conventional problems and provides a recording device that can accommodate two recording sheet rolls, has good operability in sheet setting methods, and does not require a large motor. It is something.

Means for Solving the Problems> Means of the present invention for solving the above-mentioned conventional problems is that in a recording apparatus that transports a recording sheet with a platen and records an image according to image information with a recording head, A sheet holder that allows the first housing and the second housing to be opened and closed, and that can individually store two recording sheets wound in a roll in the first housing; A feed member is provided in the second housing to convey the recording sheet to the recording section, and a feed member is provided in the second housing to convey the recording sheet stored in the other sheet holder to the recording section. The present invention is characterized in that a control section is provided for controlling the rotational speed of the platen to be slower than the maximum rotational speed of the platen during recording.

Effect> According to the above means, by storing recording sheet rolls of different sizes in each sheet holder, it becomes possible to record on a sheet that matches the size of image information. Additionally, during recording, by slowing down the rotation speed of the platen before the recording sheet reaches the recording section, that is, when the recording head and platen are in direct pressure contact, large rotational torque can be generated without using a large motor. It is something that makes you

<Embodiment> Next, an embodiment of the present invention in which the above means is applied to a facsimile will be described.

FIG. 1 is a perspective explanatory view of the state in which the second housing B is opened to the first housing, FIG. 2 is a cross-sectional explanatory view thereof, and the third
The figure is an explanatory cross-sectional view when both the cylindrical bodies are closed.

In the figure, a first casing A, which is the main body of the device, and a second casing B, which is 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 that lock each other are provided at the open ends of the casings A and B, and when the hooks 3 are released from the lock, The second casing B is biased by the spring 2.
is configured to be opened from the first housing A.

Further, the first housing A has a drop-in type roll holder 6.7 that can individually store sheet rolls 43.5a of various sizes in which recording sheets 4.5 are wound into rolls.
are provided in parallel. This roll holder6.
One of the recording sheets 4 and 5 stored in 7 is conveyed to the recording section 8 according to a selection signal, a predetermined image is recorded in the recording section 8, and the recording sheet after recording is transferred to the first housing A. The image is cut from the trailing edge by a cutter 9 provided at
The device is configured to be discharged from the device by the following steps.

Note that the recording section 8 is a recording sheet made of a heat-sensitive sheet)4.
5, and a line-type recording head 8b that presses against the roller 8a and heats the recording sheet according to image information, as shown in FIG. The platen roller 8a is disposed in the second casing, the recording head 8b is disposed in the second casing B, and both cylindrical bodies A,
When B is closed, the two are pressed against each other by a pressing spring 8C attached to the back surface of the recording head.

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 recording sheet 4.5 stored in the roll holder 6 (hereinafter referred to as "first holder j") that is closer to the recording section 8 4 is provided between the first holder 6 of the first housing A and the platen roller 8a, and the feed roller pair 11
A sheet presence/absence detection sensor 13a and a sheet width detection sensor 13b are provided between the sheet guide 12 and the platen roller 8a. 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 detection sensor 16a is also provided between the feed roller pair 14 and the recording head 8b via a sheet guide 15. and sheet width detection sensor 16
b is provided.

In addition, the platen roller 8a and the feed roller pair 11
．． A drive system and control (not shown) that drives and rotates 14? A portion of the platen roller 8a is provided in the first housing A, and is configured such that the rotation speed of the platen roller 8a is controlled by the control section as described below.

Note that C in the figure is a document transport system, in which the document 18 placed on the document Rr1 stand 17 formed on the top surface of the second housing B and guided on both sides by the document side guides 17a is moved by the separation rollers 19. The sheet is separated one by one, conveyed at a constant speed to the left side of the drawing by conveying rollers 20, and discharged onto a discharge tray 22 by discharge rollers 21. Further, while the original 18 is conveyed, it is irradiated with light by a light source 23 of an original reading system, and the reflected light reaches an image reading element 26 such as a COD via a plurality of mirrors 24 and a lens 25, and the original &ilB. It is configured so that an image is read and the image signal is transmitted to a predetermined recording system.

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

First, when setting the sheet roll, use hook 3.
Release the lock to open the second casing B, and then remove the first holder 6.
A sheet roll 4a of A4 size, for example, is stored therein, and the leading edge of the sheet is passed between a pair of feed rollers 11 to reach near the leading edge of a sheet guide 12. Similarly, a sheet roll 5a of B4 size, for example, is stored in the second holder 7, and the leading end of the sheet is passed between the pair of feed rollers 14 and brought to the vicinity of the leading end of the sheet guide 15.

After setting the sheet roll as described above, the second housing B is closed and a manual canting operation is performed.

In this operation, first, the feed roller 11 and the platen roller 8a are rotated in the direction of the arrow shown in FIG. 3 to convey the recording sheet 4 to the cutter 9 and the discharge roller pair 1O, and the cutter 9 cants the leading edge of the recording sheet. Further, the canted recording sheet 4 is discharged to the outside of the apparatus, and the platen roller 8
A and the feed roller 11 are rotated in the opposite direction to the above, and the leading edge of the recording sheet 4 is rewound to the vicinity of the leading edge of the sheet guide 12 to be placed in a standby state. The leading end of the recording sheet 5 is cut by operating the roller 8a and the cutter 9, and the leading end of the recording sheet after being cut is rewound to the vicinity of the leading end of the sheet guide 15 and placed in a standby state.

The manual cant operation cleans the leading edge of the recording sheet 4.5, and by controlling the amount of rotation of the platen roller 8a and feed roller 11.14, the leading edge of the recording sheet is brought to an accurate standby position.

゛ Next, when recording, if A4 size image information is received, the sheet width detection sensor 13b detects that the width of the recording sheet 4 is A4 size, and the feed roller 11 and platen roller 8a Rotate in the direction of the arrow in Figure 3 (the direction shown by the arrow is the forward direction, and the direction opposite to the arrow is the reverse direction). At this time, the feed roller 11 and platen roller 8a are driven as shown in FIG.
As shown in the timing chart of A) (controlled by the control section).

That is, first, the recording sheet 4 is conveyed to the recording section 8 by the feed roller 11 rotating in one head direction, and when the leading edge of the sheet reaches the pressure contact part between the platen roller 8a and the recording head 8b, the feed roller 11 is driven to rotate. Thereafter, the recording sheet 4 is conveyed at a constant speed by the rotation of the platen roller 8a, and the recording head 8b generates heat in accordance with the image information, so that the received image information is recorded on the recording sheet 4. Note that while the recording sheet 4 is being conveyed by the platen roller 8a, the feed roller 11 rotates.

At this time, the rotational speed of the platen roller 8a is set during the period T1 from the start of rotation until the leading edge of the recording sheet 4 reaches the recording section 8;
That is, when the platen roller 8a rotates while being in direct pressure contact with the recording pad 8b, it rotates at a speed N1 that is slower than the normal rotation speed. The leading edge of the recording sheet 4 is the recording section 8.
When the recording sheet 4 is transported between the platen roller 8a and the recording head 8b, the rotational speed increases to the normal rotational speed Nt, and predetermined recording is performed on the recording sheet 4 at that speed. .

Thereafter, when the recording of the received image information is completed, the recording sheet is conveyed at the same speed until the trailing edge of the image reaches the cuffer 9, then stopped, and the cuffer 9 cuts the image from the trailing edge. Furthermore, the recorded recording sheet is ejected by a pair of rollers 10.
At the same time, the platen roller 8a and the feed roller 11 rotate in opposite directions, and the leading edge of the recording sheet 4 is rewound to the standby position.

During the above-mentioned rewinding, the cant tip of the recording sheet 4 is rewound from the cutter 9 position to the recording unit 8 at T2, that is, when the recording sheet 4 is interposed between the platen roller 8a and the recording head 85, the platen While the roller 8a rotates at a normal rotational speed and the leading edge of the recording sheet 4 is rewound from the recording unit 8 to the standby position by the feed roller 11, that is, the platen roller 9a rotates while being in direct pressure contact with the recording head 8b. In this state, it rotates at a speed NI that is slower than the normal rotation speed.

As described above, during recording, the platen roller 8a is rotated at a low speed when it is in direct pressure contact with the recording head 8b.

The speed control described above is performed by a control section, and its configuration is as shown in FIG. 4(B), in which a recording operation signal is transmitted from the CPU to a motor drive circuit, and the motor is driven via the circuit. At this time, the number of rotational steps of the motor is calculated by the step pulse calculation circuit. Therefore, when rotating the motor sequentially, it is important to check whether the leading edge of the recording sheet 4 has been conveyed from the standby position to the recording section 8, and whether the trailing edge of the recorded image has been conveyed from the recording section 8 to the cutter 9 position after recording is completed. is detected by counting the number of rotational steps of the motor with a step pulse calculation circuit, and when the motor is rotated in reverse, it is detected whether the leading edge of the sheet has been rewound from the cutter 9 position to the recording section 8, and whether or not the sheet tip has been rewound from the cutter 9 position to the recording section 8. It is detected in the same manner as described above whether or not the motor has been rewound from the position to the standby position, and the CPU controls the rotational speed of the motor as shown in Fig. 4 (^) according to the signal from the step pulse calculation circuit. .

In general, the motor that drives and rotates the platen roller 8a has a characteristic that, as shown in FIG. 5, it has a large torque when the rotation speed is slow, but the torque decreases as the rotation speed increases. Therefore, when the platen roller 8a rotates while being in direct pressure contact with the recording head 8b, the friction is greater than when the recording sheet is interposed between them.
When a large torque is required to rotate the platen roller 8a, the large torque is generated by setting the rotational speed of the platen roller 8a to be slow. Therefore, as the motor for rotating the platen roller 8a, it is sufficient to use a motor that can rotate the maximum load during normal recording, and there is no need to use a large motor that takes into account the above-mentioned increased load.

Note that the above case was explained based on the case where A4 size image information was received, but if the received image is 84 size, the sheet width detection sensor 16b detects that the recording sheet 5 is 84 size, and the recording sheet 5 is 5, the feed roller 14, recording section 8, and cutter 9 operate in the same manner as described above to perform B4 size recording on the recording sheet 5.

Next, in jam processing, etc., the hook 3 is released and the second casing B is opened. As shown in Figure 2, the recording sheet 4 is provided separately.
is separated into the first housing A side, and the recording sheet 5 is separated into the second housing B side. Therefore, when cleaning a jam on one recording sheet, the other recording sheet does not get in the way, and the sheet rolls 4a and 5a can be replaced individually. Furthermore, when the second housing B is opened, the respective sheet rolls 4a and 5a can be viewed at the same time.
It is possible to easily check the remaining roll amount.

Also, when setting the sheet roll, the platen roller 8a and recording head 8b of the recording section 8 are provided separately in the first housing A and the second housing B, and the cutter 9 is provided on the first housing A side. As shown in FIG. 6, for example, the leading edge of the recording sheet 4 to be set is passed between the pair of feed rollers 11, and
It can be easily and reliably set by passing it along the platen roller 8a through the gap between the cutters 9 and between the pair of ejection rollers 10 and guiding it out of the apparatus, and prevents the recording sheet 4 from tilting when it is sent. Setting can also be easily prevented. The same applies to the case where the platen roller 8a of the recording section 8 is provided in the second casing B and the recording head 8b is provided in the first casing A.

Furthermore, the feed roller pair 11.14 and the platen roller 8a
By providing a drive system such as this in the first housing, space can be used effectively, and the second housing B can be placed lighter, so the entire device can be made smaller.

When setting or jamming the recording sheet 4, as shown in FIG.
If the pressure roller llb is provided on the side of the second housing B, and the pressure roller llb is placed in pressure contact with the roller llb, the recording sheet 4 becomes free when the second housing B is opened, making it easier to set and clear jams. . In this case, it is effective to set recording sheets of frequently used sizes in the first holder 6.

Further, in the above embodiment, when sheet rolls of the same size are stored in the holders 6 and 7, one of the recording sheets, for example the recording sheet 4, is used during recording. When the recording sheet 4 runs out, the sheet presence/absence sensor 13a detects this, and the control section can also cause the other recording sheet 5 to be used. In this case, the recording sheet 5 has a reserve function.

Further, in the above-described embodiment, the seat holders were provided in parallel to the left and right in the first housing A, but they may be provided in parallel to the top and bottom.

Further, in the above embodiment, the platen roller 8a and the feed rollers 11, 14 are configured as rollers, but they may also be configured as rotating belts suspended on pulleys or the like.

<Effects of the Invention> As described above, the present invention has a structure in which the first housing and the second housing can be opened and closed, the first housing can accommodate two sheet rolls, and the feed member conveys each sheet. Since it is provided separately in both the housings, it is possible to select and record a recording sheet that matches the received image size, and it is also possible to easily set recording sheets and clear jams. In addition, when there is no recording sheet between the platen and the recording head, by slowing down the rotation speed of the platen, there is no need to use a large motor to account for the increased load, so the motor that rotates the platen can be made smaller. This makes it possible to reduce the size and cost of the entire device.

[Brief explanation of drawings]

FIG. 1 is a perspective explanatory view of a recording device according to an embodiment of the present invention with the second receptacle body opened; FIG. 2 is a cross-sectional explanatory view thereof;
Fig. 3 is a cross-sectional explanatory diagram of the second housing closed, Fig. 4 (^) is a timing chart showing the rotation speed of the platen roller during recording, and Fig. 4 (B) is an explanatory diagram of the motor speed control configuration. , Fig. 5 is an explanatory diagram showing the speed-torque characteristics of the motor, Fig. 6 is an explanatory diagram when setting a recording sheet, and Fig. 7 is an explanatory diagram showing the case where a recording sheet is set. It is an explanatory view of an example provided in . A is the first housing, B is the second housing, C is the original transport system, D is the reading system, 1 is the shaft, 2 is the spring, 3 is the hook, 4.5 is the recording sheet, 4a and 5a are the sheet rolls, 6 .7 is a roll holder, 8 is a recording unit, 8a is a platen roller, 8b is a recording head, 9 is a cutter, IO is a pair of ejection rollers, il
is a pair of feed rollers, 12 is a sheet guide, 13 a
+ 16a is sheet presence/absence sensor, 13b, 16b
14 is a sheet width detection sensor, 14 is a pair of feed rollers,
15 is a sheet guide.

Claims (2)

[Claims] (1) In a recording device that transports a recording sheet with a platen and records an image according to image information with a recording head,
A sheet holder that allows a first housing and a second housing to be opened and closed, and that can individually store two recording sheets wound in a roll in the first housing, and records stored in one of the sheet holders. A feed member is provided in the second housing to convey the sheet to the recording section, and a feed member is provided in the second housing to convey the recording sheet stored in the other sheet holder to the recording section. What is claimed is: 1. A recording apparatus comprising: a control unit configured to control a rotational speed of the platen before reaching the maximum rotational speed of the platen to be slower than a maximum rotational speed of the platen during recording. (2) The recording apparatus according to claim 1, wherein the platen is provided in one of a first casing and a second casing, and the recording head is provided in the other casing.