JPS63106258A - Recorder - Google Patents

Abstract

PURPOSE:To surely feed and convey a recording sheet, by driving a platen roller and members, which feed the recording sheet to a recording head, through independent driving sources and changing a rotary speed in accordance with a kind of the recording sheet. CONSTITUTION:Paired rollers 11a, 11b and 14a, 14b, which convey recording sheets 4 and 5, are driven by belts 17f and pulleys 17d which are respectively driven by separate motors 17a, 17b. While a platen roller 8a, which rotates being forced to come into press contact with a recording head 8b, is also driven by a belt 17f and a pulley 17d which are driven by the third motor 17c. Speeds of the motors 17a-17c are controlled in such a manner that a speed of the paired rollers 11, 14 is increased larger than that of the platen roller 8a, when the sheets 4, 5 are formed in large thickness, while decreased smaller than the speed of the platen roller 8a when the sheets are formed in small thickness. In this way, the recording sheet is surely caught and conveyed.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a recording apparatus having a feed member for preliminary conveyance of recording sheets in front of a recording section.

<Prior art and problems to be solved by the invention> Conventionally, as a recording apparatus having a feed member for preliminary conveyance of a recording sheet, for example, a recording apparatus capable of storing two sheet rolls,
There is a so-called double roll type device. However, conventional devices of this type are large console types;
The driving force transmission mechanism was complicated, and the recording sheet setting method was also difficult to use because it was set in mm.

In addition, in the above device, the conveyance speed of the feed member is synchronized with the movement of the platen roller and set to rotate at the same circumferential speed, so when the leading edge of the sheet is fed into the recording section, it is easily aligned with the platen roller. There was a problem that the recording head did not come into pressure contact with the rad, resulting in a feed error.

The present invention solves the above-mentioned conventional problems and provides a recording apparatus that can reliably carry out preliminary conveyance depending on the type of recording sheet.

Means for Solving the Problems> Means of the present invention for solving the above-mentioned conventional problems includes a feed member that conveys a recording sheet to a recording section consisting of a platen and a recording head, and a feed member that conveys a recording sheet to a recording section consisting of a platen and a recording head. A recording device that conveys a recording sheet to the recording section by driving each of them with an independent drive source and records an image according to image information, and the feed member rotates according to the fall of the recording sheet to be used. This device is characterized by incorporating a control section that can change the circumferential speed and the rotational circumferential speed of the platen, respectively.

According to the above means, the rotational speed of the feed member and the platen can be freely set according to the stiffness, material, etc. of the recording sheet to be used, and the optimum conveyance state for the recording sheet can be ensured. It becomes possible.

<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 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 housing B is configured to be released from the first housing A by the bias of the spring 2.

The first casing A has sheet rolls 4a of various sizes in which recording sheets 4 and 5 are wound in a roll shape.

Two drop-in type roll holders 6.7 are provided in parallel, each of which can accommodate the rolls 5a individually.

Recording sheet 4 stored in this roll holder 6.7.
Either one of 5 is conveyed to the recording section 8 according to a selection signal from the control section, a predetermined image is recorded in the recording section 8, and the recording sheet after recording is passed through a cutter provided in the first housing A. 9 from the rear end of the image, and is configured to be discharged to the outside of the apparatus by a pair of discharge rollers 10 also provided in the second housing.

The recording section 8 includes a platen roller 8a that conveys the recording sheet 4.5 at a constant speed, and a recording sheet made of a heat-resistant sheet that is pressed against the platen roller 8a according to image information as shown in FIG. It is composed of a heating 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 both units A,
When B is closed, a pressure spring 8c attached to the back surface of the recording head presses them together.

The recording sheets 4 and 5 are each conveyed to the recording section 8 by a pair of feed rollers serving as feed members, and the recording sheet 4 is stored in a roll holder (hereinafter referred to as "r first holder") 6 that is closer to the recording section. A sheet presence/absence detection sensor 13a and a sheet width detection sensor 13b are provided via a sheet guide 12 between the feed roller pair 11 that conveys the sheet and the platen roller 8a. Further, the feed roller pair 14 that conveys the recording sheet 5 stored in the roll holder (hereinafter referred to as "second holder 1") 7 that is farthest from the recording unit 8 is located on the second housing B side, and is located between the recording head 8b and the second roller holder 7. A sheet presence/absence sensor 16a and a sheet width detection sensor 16b are provided between the feed roller pair 14 and the recording head 8b via a sheet guide 15.

Further, the feed roller pair 11.14 and the platen roller 8a are provided with individual drive motors 17a and 17b, respectively.

17c so that the driving force is transmitted independently.

That is, as shown in FIG.
shafts 11a, 14a and platen roller 8a, respectively.
A pulley 17d is attached to the shaft of each of these, and each of these boots +J17d and each drive motor 17a, 17b.

A timing belt 17f is suspended between the rollers 7e respectively attached to the drive shafts of the rollers 17c, so that the feed roller pair 11.14 and the platen roller 8a can be driven individually by each drive motor 17a, 17b+17c. It consists of and each drive motor 17
a, 17b, and 17c are driven and controlled at a predetermined speed by a control section shown in the block diagram of FIG.

Here, to explain the above drive control, in this embodiment, the rotational peripheral speed of the feed roller pair IL III is set slightly faster than the rotational peripheral speed of the platen roller 8a, and mode 2 is set, whereas the rotational peripheral speed of the platen roller 8a is Mode (2) is set so that the peripheral speed of rotation of the pair of feed rollers 11, 14 is slightly slower than that of the pair of feed rollers 11 and 14, and each mode is configured to be selectable by a changeover switch (not shown).

Note that the platen roller 8a and the feed roller pair 11.
The mode for setting the relationship of the rotational speed with 14 is not limited to the above-mentioned modes ① and ②, and can be set as appropriate depending on the use.

Further, the pair of feed rollers 11, 14 are pressed against each other by springs llb and 14b attached to their respective shafts, so that one roller is rotated by the rotation of the other roller.

Reference numeral 18 in FIG. 3 denotes an original transport system, and an i! The original 1 is placed on the table and guided on both sides by the original side guides 18b.
The paper sheets 9 are separated one by one by a separation roller 18c, are transported at a constant speed to the left in the drawing by a transport roller 18d, and are discharged onto a discharge tray 18r by a discharge roller 18e.

Also, while the original 19 is being conveyed, the original reading system 20
Light is emitted from a light source 20a, and the reflected light passes through a plurality of mirrors 20b and lenses 20c to an image reading element 20d such as a CCD, where the image of the original 19 is read, and the image information is stored in a predetermined recording system. configured to be transmitted.

Next, the operation of the apparatus configured as described above will be described. For example, the first holder 6 stores a sheet roll 4a made of a thick sheet of A4 size wrapped around it, and the second holder 7 stores a sheet roll 4a of A4 size and a thin sheet wrapped around it. A case will be described in which a sheet roll 5a formed by winding a sheet is stored.

First, when setting the sheet roll, use hook 3.
Release the lock to release the second body B, and then remove the first holder 6.
A sheet roll 4a is stored in the sheet roll 4a, 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 is stored in the second holder 7, and the leading edge of the sheet is passed between the pair of feed rollers 14 to reach near the leading edge of the sheet guide 15.

After setting the sheet rolls 4a and 5a as described above, the second housing B is closed and a manual cutting operation is performed.

In this operation, first, the feed roller pair 11 and the platen roller 8a are rotated in the direction of the arrow in FIG. . Further, the canted recording sheet 4 is discharged out of the apparatus, and the platen roller 8a and the pair of feed rollers 11 are rotated in the opposite direction to the above, the leading edge of the recording sheet 4 is rewound to the vicinity of the leading edge of the sheet guide 12, and the recording sheet 4 is placed in a standby state. do.

Next, regarding the recording sheet 5, the leading edge of the recording sheet 5 is cut by operating the feed roller 14, platen roller 8a, and cutter 9 in the same manner as described above in mode H, and the leading edge of the recording sheet after cutting is moved to the sheet guide 15. Rewind it to near the tip and put it in standby mode.

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

Next, during recording, referring to the pronk diagram of the control unit in FIG. 5 and the flowchart in FIG. ) and sent to the data control unit as a digital signal. Depending on the data, one of the recording sheets 4.5 is selected. For example, when receiving A4 size image information, sheet width detection sensor 1
3b detects that the width of the recording sheet 4 is A4 size, and mode i is selected by a signal from a CPU (central processing unit), and motors 17a and 17c are driven according to the selected mode.

Therefore, the feed roller pair 11 and the platen roller 8a sequentially rotate in the direction of the arrow in FIG.
is conveyed to the recording section 8. At this time, in mode (2), the rotational peripheral speed of the feed roller pair 11 is slightly faster than the rotational peripheral speed of the platen roller 8a, so the leading edge of the thick recording sheet 4 is connected to the rotating platen roller 8a and the recording head 8b.
It will be forcibly fed into the pressure contact part with. This forced feeding effect is effective when the recording sheet is thick, that is, the sheet is stiff.

As described above (when the leading edge of the recording sheet 4 is conveyed to the recording section 8, the motor 17a that drives the feed roller pair 11 is turned off, the recording sheet 4 is conveyed at a constant speed by the platen roller 8a, and the image information is The received image is recorded by the recording head 8b which generates heat accordingly.At this time, the pair of feed rollers 11 rotate together.

In addition, the feed roller pair 11 and the platen roller 8a
The motors 17a and 17c that rotate the motors 17a and 17c are controlled by transmitting signals from the CPU via a motor control section and a motor driver.

Further, the data control section outputs data to the data bus and R
AM captures this data. Further, the data in the R'AM is taken into the CPU and decoded, and the decoded data is sent to the RAM again and stored.

Furthermore, when one line of data is stored in the RAM, the data is sent to the recording control section, and further sent from the recording control section to the recording head driver, where the recording head 8b records one line of data.

When the recording for one line is completed, a signal from the CPU is sent to the dryer 17c to record the next line.
rotates the platen roller 8a, and the recording sheet 4
is conveyed for one line. By repeating this, the predetermined recording is completed.

When the recording of image information is completed as described above, the image is conveyed and canted until the trailing edge position reaches the cutter 9, and the recorded recording sheet is discharged out of the apparatus by a pair of discharge rollers 10, and the motor 17a, 17c rotates in the opposite direction to rewind the leading edge of the recording sheet 4 to the standby position to finish receiving and recording the A4 size. During the rewinding, the control unit controls the number of lines from the position of the cutter 9 to the standby position. The platen roller 8a and the feed roller pair 11 are reversely rotated to rewind the leading edge of the recording sheet 4 to a predetermined standby position.

Next, when the received image is of 84 size, the sheet width detection sensor 16b detects that the recording sheet 5 is of B4 size, and the motors 17b and 17C are driven in mode 2 according to a signal from the CPU to pair the feed rollers. 14 and the platen roller 8a, and predetermined recording is performed in the same manner as described above.

In the case of the above mode (■), the circumferential speed of the platen roller 8a is slightly faster than the circumferential speed of the feed roller pair 14, so
The leading edge of one recording sheet 5 is guided by the circumferential surface of the rotating platen roller 8a, and is conveyed to the pressure contact portion between the platen roller 8a and the recording head 8b in a drawn-in manner. This pulling effect is effective when the recording sheet is thin, ie, has a weak stiffness.

In conveying the recording sheet 4 or 5 as described above,
Feed roller pair 11.1 depending on the properties of each sheet
By changing the rotational speeds of the recording sheet 4 and the platen roller 8a, smooth conveyance is possible without causing troubles such as folding of the leading edge of the sheet when feeding the recording sheet to the recording section.

Incidentally, the above mode can be selected by using a mode selection changeover switch when inserting the recording sheet.

Other Embodiments> In the above-mentioned embodiments, the platen and the feed member were each constructed of roller-shaped members, but as another example, they may be constructed of rotating belts suspended from pulleys or the like. .

Furthermore, in the above embodiment, a so-called double roll type recording device that stores two sheet rolls was explained.
It goes without saying that the present invention can be similarly applied to a recording apparatus that accommodates only one sheet roll, and may be applied not only to a thermal recording method but also to a thermal transfer recording method that uses an ink sheet.

Furthermore, in the above-mentioned embodiment, the mode is set to two types, 1 and 2, but this is because the feed roller pair 11.14 and the platen roller 8a are set at the optimum speed to convey the recording sheet depending on the properties of the recording sheet. It can be freely set to rotate, and the mode may be appropriately switched depending on not only the thickness of the sheet but also the properties of the sheet such as the material.

<Effects of the Invention> As described above, the present invention allows the rotational speeds of the platen and the feed member to be individually varied depending on the properties of the recording sheet, so even if the recording sheet is thick or thin, Even if the recording sheet is printed, it is possible to set the optimum conveyance mode for the sheet, and it is possible to ensure feeding and conveyance of the recording sheet.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the first housing A and second housing B in an open state, FIG. 2 is a cross-sectional view thereof, and FIG. 3 is a cross-sectional view of the both housings closed. FIG. 4 is an explanatory diagram showing the driving force transmission configuration, FIG. 6 is a flowchart of the recording operation, and FIG. 5 is an explanatory diagram of the control section. A is a first housing, B is a second housing, 1 is a shaft, 2 is a spring, 3 is a hook, 4 and 5 are recording sheets, 4a and 5a are sheet rolls, 6 and 7 are roll holders, 8 is a recording section , 8a is a platen roller, 8b is a recording head, 8c is a spring, 9
is a Kanku, lo is a pair of discharge rollers, 11 is a pair of feed rollers, lla is a shaft, 11b is a spring, 12 is a sheet guide,
13a is a sheet presence/absence detection sensor, 13b is a sheet width detection sensor, 14 is a pair of feed rollers, 14a is a shaft, 1
4b is a spring, 15 is a sheet guide, 16a is a sheet presence/absence detection sensor, 16b is a sheet width detection sensor, 17a
, 17b, 17c are motors, 17d, 17e are pulleys, 17f is a timing belt, 18 is a document conveyance system, 18
18a is a document placement table, 18b is a document side guide, 18c is a separation roller, 18d is a transport roller, 18e is an ejection roller, 18f is an ejection tray, 19 is an original, 20 is an original reading system, 20a is a light source, 20b is a mirror, 20c is a lens, and 20d is an image reading element.

Claims (1)

[Claims] It has a feed member that conveys the recording sheet to the recording section consisting of a platen and a recording head, and by driving the platen and the feed member with independent drive sources, the recording sheet is conveyed to the recording section and image information is transferred. The recording device records an image according to the type of recording sheet used, and is characterized by incorporating a control section that can change the rotational speed of the feed member and the rotational speed of the platen, respectively, according to the type of recording sheet used. recording device.