JPH0772040B2 - Recording device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a recording apparatus capable of accommodating two recording sheet rolls.

<Prior Art> In a conventional desktop type recording apparatus such as a facsimile or a printer, one sheet roll of a predetermined size formed by winding a recording sheet into a roll is housed, and the recording sheet is sequentially fed out. However, it is configured to record the received image information.

<Problems to be Solved by the Invention> However, when the recording sheet set in the apparatus having the above-mentioned configuration is of A4 size, for example, when receiving and recording image information of B4 size, this is set. It is necessary to reduce and record. On the contrary, when a B4 size recording sheet is set, when receiving and recording the A4 size image information, there is a problem that a blank portion is generated on the recording sheet.

In order to solve the above problem, there was a so-called double roll type device capable of accommodating two sheet rolls, but a conventional device of this type is a large console type device, and a recording sheet setting method is also available. It was complicated and not easy to use.

Further, in the double roll type apparatus, at the time of recording, the platen roller rotates while the platen roller is in direct pressure contact with the recording head until the leading end of the recording sheet reaches the recording portion. Therefore, the rotational torque of the platen roller needs to be larger than that when the recording sheet is sandwiched and conveyed between the roller and the recording head (recording section), and therefore a large motor must be provided as a driving means. there were.

The present invention solves the above-mentioned problems of the related art, and provides a recording apparatus that can accommodate two recording sheet rolls, has good operability such as a sheet setting method, and does not require a large motor. It is a thing.

<Means for Solving Problems> Means of the present invention for solving the above conventional problems is a recording apparatus that conveys a recording sheet by a platen and records an image according to image information by a recording head, A sheet holder capable of opening and closing the first casing and the second casing, and separately accommodating two recording sheets wound in a roll around the first casing, and one sheet holder. A first feed member that conveys the recording sheet to the recording unit, and a second feed member that conveys the recording sheet stored in the other sheet holder to the recording unit in the second housing, and At the time of recording, the first feed member and the second feed member are selectively operated, and the leading edge of the recording sheet conveyed by one of the selectively operated first and second feed members is recorded. Before reaching the section It is characterized in that a control unit for controlling the rotation speed of the platen to be slower than the maximum speed of the platen at the time of recording is provided.

<Operation> According to the above means, it is possible to record on a sheet that matches the size of image information by accommodating recording sheet rolls of different sizes in the respective sheet holders. During recording, a large rotational torque is generated without using a large motor by slowing the rotation speed of the platen before the recording sheet reaches the recording unit, that is, when the recording head and platen are in direct pressure contact. It is what makes me.

<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 in a state where the first housing A and the second housing B are opened, FIG. 2 is a sectional explanatory view thereof, and a third
The figure is a cross-sectional explanatory view when both the casings are closed.

In the figure, a first housing A serving as a main body of the apparatus and a second housing B serving as a lid thereof are pivotally attached by a shaft 1, and can be opened and closed around the shaft 1. Further, a spring 2 is provided on the shaft 1 which serves as the center of rotation, and a hook 3 for engaging with each other is provided at the open ends of the casings A and B. When the hook 3 is released from engagement, The second housing B is configured to be released from the first housing A by the bias of the spring 2.

Further, two drop-type roll holders 6 and 7 capable of individually accommodating sheet rolls 4a and 5a of various sizes in which the recording sheets 4 and 5 are wound in a roll are provided in parallel in the first housing A. Has been. One of the recording sheets 4 and 5 stored in the roll holders 6 and 7 is conveyed to the recording unit 8 by a selection signal, a predetermined image is recorded in the recording unit 8, and the recording sheet after recording is The image is cut from the rear end of the image by the cutter 9 provided in the first housing A, and is discharged to the outside of the apparatus by the pair of discharge rollers 10 also provided in the first housing A.

The recording section 8 is a recording sheet made of a heat sensitive sheet.
The platen roller 8a conveys the sheet at a constant speed, and the line type recording head 8b presses the roller 8a as shown in FIG. 3 and heats the recording sheet according to image information. The platen roller 8a is arranged in the first housing A, the recording head 8b is arranged in the second housing B, and when both housings A and B are closed, a pressing spring mounted on the back surface of the recording head.
Both are configured to be pressed against each other by the 8c.

The recording sheets 4 and 5 are conveyed to the recording unit 8 by a pair of feed rollers that are feed members.
The feed roller pair 1 which is the first feed member for conveying the recording sheet 4 stored in the roll holder (hereinafter, referred to as “first holder”) 6 closer to the first roller is the first holder 6 of the first housing A and the platen. A sheet presence / absence detection sensor 13a and a sheet width detection sensor 13b are provided between the roller 8a and the feed roller pair 11 and the platen roller 8a via a sheet guide 12. The recording unit 8
The feed roller pair 14 which is the second feed member for conveying the recording sheet 5 accommodated in the roll holder 7 (hereinafter referred to as the "second holder") farther from the recording head 8b is on the side of the second housing B. Between the second holder 7 and
A sheet presence / absence detection sensor 16a and a sheet width detection sensor 16b are also provided between the feed roller pair 14 and the recording head 8b via a sheet guide 15.

In addition, the platen roller 8a and the feed roller pair 11, 14
A drive system and a control unit (not shown) for driving and rotating the are provided in the first housing A, and the control unit controls the platen roller 8a.
Is configured to be controlled as described below.

In the figure, C is an original conveying system, which is placed on an original placing table 17 formed on the upper surface of the second housing B and has an original size guide.
Documents 18 guided on both sides by 17a are separated one by one by a separation roller 19, and are conveyed by a conveyance roller 20.
The sheet is conveyed to the left side in the drawing at a constant speed, and is discharged to the discharge tray 22 by the discharge roller 21. Also, the manuscript 18
Is conveyed by the light source 23 of the document reading system D, and the reflected light is reflected by a plurality of mirrors 24 and lenses 25.
Through the image reading element 26 such as CCD through the document 1
The image of 8 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 described.

First, hook 3 when setting the sheet roll.
To release the second housing B, and the first holder 6
For example, the A4 size sheet roll 4a is housed, and the leading end of the sheet is passed between the feed roller pair 11 and the sheet guide
Bring it near the tip of 12. Similarly, the second holder 7
For example, a B4 size sheet roll 5a is accommodated, and the leading end of the sheet is passed between the feed roller pair 14 to reach the vicinity of the leading end of the sheet guide 15.

After setting the sheet roll as described above, the second casing B is closed and the manual cutting operation is performed.

This operation starts with the feed roller 11 and the platen roller 8a.
Is 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 10, and the cutter 9 cuts the leading edge of the recording sheet. Further, the cut recording sheet 4 is discharged to the outside of the apparatus, and the platen roller 8a and the feed roller 11 are rotated in the opposite direction to the recording sheet 4
Rewind the tip of the sheet to near the tip of the sheet guide 12 and set it in the standby state. Next, for the recording sheet 5, the feed roller 14, the platen roller 8a and the cutter 9 are operated in the same manner as described above to cut the front end of the recording sheet 5, and the post-cut recording sheet front end is wound to the vicinity of the front end of the sheet guide 15. Put it back and put it in standby.

By the above manual cutting operation, the leading ends of the recording sheets 4 and 5 are cleaned, and by controlling the rotation amounts of the platen roller 8a and the feed roller pairs 11 and 14, the leading ends of the recording sheets reach the accurate standby position.

Next, at the time of recording, if image information of A4 size 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 the platen roller 8a move to the third position. Rotate in the direction of the arrow in the figure (the direction indicated by the arrow is the forward direction, and the direction opposite to the arrow is the reverse direction). At this time, the drive of the feed roller 11 and the platen roller 8a is controlled by the controller as shown in the timing chart of FIG.

That is, first, the recording sheet 4 is conveyed to the recording section 8 by the feed roller 11 rotating in the forward direction, and when the leading end of the sheet reaches the pressure contact portion between the platen roller 8a and the recording head 8b, the feed roller 11 is driven and rotated. The recording sheet 4 is stopped, and 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 according to the image information, so that the received image information is recorded on the recording sheet 4. Recording sheet 4
The feed roller 11 turns around while being conveyed by the platen roller 8a.

At this time, the rotation speed of the platen roller 8a is the period T ₁ from the start of rotation to the time when the leading edge of the recording sheet 4 reaches the recording portion 8, that is, the normal rotation when the platen roller 8a rotates while directly contacting the recording head 8b. It rotates at a speed N ₁ slower than the speed. Then when the leading end of the recording sheet 4 is conveyed to the recording unit 8, i.e. the platen roller 8a and the recording head 8b recording sheet between up rotational speed at the time of the transported normal rotational speed N _2, and the its speed Then, predetermined recording is performed on the recording sheet 4.

Then, when the recording of the received image information is completed, the recording sheet is conveyed and stopped until the image trailing edge position reaches the cutter 9 at the above speed, and the cutter 9 cuts from the image trailing edge. Further, the recorded recording sheet is discharged to the outside of the apparatus by the carry-out roller pair 10, and the platen roller 8a and the feed roller 11 rotate in the opposite directions, and the leading end of the recording sheet 4 is rewound to the standby position.

Also during the rewinding, when the cutting tip of the recording sheet 4 is rewound from the position of the cutter 9 to the recording unit 8 T ₂ , that is, when the recording sheet 4 is interposed between the platen roller 8a and the recording head 8b. The platen roller 8a rotates at a normal rotation speed, and while the leading end 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 8a rotates while directly contacting the recording head 8b. In this state, it rotates at a speed N ₁ slower than the normal rotation speed.

When recording as described above, the platen roller 8a is the recording head.
The speed is controlled so that it rotates at a low speed when rotating in a state of being directly pressed against 8b.

The speed control is performed by the control unit, and the constitution is such that the recording operation signal is transmitted from the CPU to the motor drive circuit as shown in FIG. 4 (B), and the motor is driven through the circuit. At this time, the number of rotation steps of the motor is calculated by the step pulse calculation circuit. Therefore, when the motor is rotated in the forward direction, it is determined 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 completion of recording. Is detected by counting the number of rotation steps of the motor by the step pulse calculation circuit, and when the motor is rotated in the reverse direction, whether or not the leading edge of the sheet has been rewound from the position of the cutter 9 to the recording unit 8, and the recording unit 8 Is detected in the same manner as above, and the CPU controls the rotation speed of the motor as shown in FIG. 4 (A) according to the signal from the step pulse calculation circuit. .

Generally, a motor for driving and rotating the platen roller 8a has a large torque when the rotation speed is low, but has a characteristic that the torque decreases as the rotation speed increases. Therefore, the platen roller 8a
When the platen roller 8a rotates in a state of being directly pressed, that is, when the recording sheet is interposed between them, the friction is large, and when a large torque is required to rotate the platen roller 8a, the rotation speed of the platen roller 8a is slowed. By setting it, a large torque is generated. Therefore, the motor that rotates the platen roller 8a may be a motor that can rotate the maximum load during normal recording, and it is not necessary to use a large motor in consideration of the increased load.

In the above case, the case where the A4 size image information is received is explained. However, when the received image is the B4 size, the sheet width detection sensor 16b detects that the recording sheet 5 is the B4 size, and the recording sheet is detected. 5, the feed roller 14,
The recording unit 8 and the cutter 9 operate in the same manner as described above to perform B4 size recording on the recording sheet 5.

Next, in jam processing or the like, the hook 3 is released from the lock and the second housing B is opened. At this time, since the respective feed roller pairs 11 and 14 are separately provided in the first casing A and the second casing B, the recording sheet 4 is provided on the first casing A side as shown in FIG. The recording sheet 5 is divided into the second housing B side. Therefore, when jamming one recording sheet or the like, the other recording sheet does not get in the way, and the sheet rolls 4a and 5a can be individually replaced. Further, when the second housing B is opened, the respective sheet rolls 4a and 5a can be seen at the same time, so that it is possible to easily confirm the remaining amount of the roll.

When setting the sheet roll, the platen roller 8a and the recording head 8b of the recording unit 8 are connected to the first casing A and the second casing B.
Since the cutter 9 is provided on the side of the first housing A, the tip of the recording sheet 4 to be set is passed between the feed roller pair 11 and along the platen roller 8a as shown in FIG. The recording sheet 4 can be easily and surely set by passing it through the gap between the cutters 9 and between the pair of discharge rollers 10 and guiding it to the outside of the apparatus, and the oblique setting of the recording sheet 4 at the time of setting can also be easily prevented. You can
The same applies when the platen roller 8a of the recording unit 8 is provided in the second housing B and the recording head 8b is provided in the first housing A.

Further, by providing a drive system such as the feed roller pairs 11 and 14 and the platen roller 8a in the first housing A, the space can be effectively used and the weight of the second housing B can be reduced, so that the entire apparatus is small. It will be.

When setting or jamming the recording sheet 4, as shown in FIG. 7, one driving roller 11a of the pair of feed rollers for conveying the recording sheet 4 is provided on the side of the first casing A and is pressed against this. If the pressing roller 11b is provided on the side of the second housing B, the recording sheet 4 is in a free state when the second housing B is opened, so that the setting and the jam processing can be performed more easily. In this case, it is effective to set a frequently used recording sheet in the first holder 6.

Further, in the above-mentioned embodiment, when the holders 6 and 7 store the sheet rolls of the same size, either one of the recording sheets, for example, the recording sheet 4 is used for recording. When the recording sheet 4 is used up, the sheet presence sensor 13a detects this and the control section can use the other recording sheet 5. In this case, the recording sheet 5 has a function as a spare.

Further, in the above-described embodiment, the sheet holders are provided on the first housing A side by side in the left and right, but they may be provided side by side in the vertical direction.

Further, in the above-mentioned embodiment, the platen roller 8a and the feed rollers 11 and 14 are shown as roller-shaped ones, but they may be rotary belts suspended by pulleys or the like.

<Effects of the Invention> As described above, the present invention is configured such that the first housing and the second housing can be opened and closed, and two sheet rolls can be housed in the first housing to convey respective sheets. Since the feed members are separately provided in the both housings, it is possible to select and record a recording sheet suitable for the received image size, and it is also easy to set the recording sheet and perform jam processing. Also, when there is no recording sheet between the platen and the recording head, by slowing down the rotation speed of the platen, it is not necessary to use a large motor in consideration of the increased load, so the motor for rotating the platen can be downsized. Therefore, the overall size of the device can be reduced and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective explanatory view of a recording apparatus according to an embodiment of the present invention with a second housing opened, and FIG. 2 is a sectional explanatory view thereof.
FIG. 3 is a cross-sectional explanatory view with the second casing closed, FIG. 4 (A) is a timing chart showing the rotation speed of the platen roller during recording, and FIG. 4 (B) is an explanation of the speed control configuration of the motor. 5 and 5 are explanatory views showing the speed-torque characteristic of the motor, FIG. 6 is an explanatory view when setting a recording sheet, and FIG. 7 is one of a pair of feed rollers provided in the first casing as a second It is explanatory drawing of the Example provided in the housing side. A is the first housing, B is the second housing, C is the original feeding system, D is the reading system, 1 is the axis, 2 is the spring, 3 is the hook, 4,5 is the recording sheet, and 4a and 5a are sheet rolls. , 6,7 are roll holders,
8 is a recording unit, 8a is a platen roller, 8b is a recording head, 9
Is a cutter, 10 is a pair of discharge rollers, 11 is a pair of feed rollers, 12 is a sheet guide, 13a and 16a are sheet presence / absence sensors, 13b and 16b are sheet width detection sensors, 14 is a feed roller pair, and 15 is a sheet guide.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kenkichi Sakuragi 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (56) Reference JP-A-60-209457 (JP, A)

Claims (2)

[Claims] 1. In a recording apparatus for conveying a recording sheet by a platen and recording an image according to image information by a recording head, a first casing and a second casing can be opened and closed, and
The recording sheet wound in a roll shape on the first housing 2
A sheet holder that can be individually stored and a first feed member that conveys a recording sheet stored in one sheet holder to a recording unit are provided, and a recording that is stored in the other sheet holder in the second housing. A second feed member that conveys the sheet to the recording unit is provided, and the first feed member and the second feed member are selectively operated during recording, and the first and second feed members are selectively operated. A control unit is provided to control the rotational speed of the platen before the leading edge of the recording sheet conveyed by one of the two feed members reaches the recording unit to be lower than the maximum speed of the platen during recording. Recording device. 2. The recording apparatus according to claim 1, wherein the platen is provided in either one of the first casing and the second casing, and the recording head is provided in the other casing.