JPS63106260A - Recoder - Google Patents

Abstract

PURPOSE:To surely feed a sheet, by driving a platen roller and members, which feed the recording sheet to a recording head, through the same driving source and providing a speed reduction system which increases a rotary peripheral speed of the platen roller faster than that of the feed members. CONSTITUTION:A motor 17 rotates a transmission gear 17d through a gear 17a to be turned in a reduced speed. Rotation of the transmission gear 17d is transmitted to a gear 11b or 14b through a selector gear 17f by controlling a solenoid 17e. Paired rollers 11a, 11c or 14a, 14c are driven, and a recording sheet 4 or 5 is fed to a recording head 8b. While the motor 17 reduces its speed through a belt 17b and a pulley 8d, but a platen roller 8a sets its rotary peripheral speed faster than the rotary peripheral speed of the paired rollers 11a, 14a. In this way, a device, which is formed in small size by using one single motor, feeds the point end of the recording sheet smoothly to the platen roller 8a.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a recording apparatus having a feed member for pre-feeding a recording sheet (+tl) 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,
I remember a so-called double roll type device. However, conventional devices of this type are large console types;
Not only is the driving force transmission mechanism complicated, but also how to set the recording sheet? It was not easy to use.

In addition, the conveyance speed of the feed member is synchronized with the movement of the platen roller and is set to rotate at the same circumferential speed, so that when the leading edge of the sheet is fed into the recording section, it fits into the gap between the platen roller and the recording head. There were problems such as not being able to enter the feed, resulting in feed errors.

SUMMARY OF THE INVENTION The present invention aims to solve the above-mentioned conventional problems and provide a recording apparatus that has a simple configuration and can improve the reliability of preliminary conveyance of recording sheets.

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 transports a recording sheet to the recording section by driving the same drive source and records an image according to image information, wherein the rotational peripheral speed of the platen is higher than the rotational peripheral speed of the feed member. The present invention is characterized in that a deceleration system is set for the platen and feed member from the drive source so as to increase the speed.

According to the above means, when the leading edge of the recording sheet is fed to the recording section by the feed member, when the leading edge of the recording sheet is conveyed to the recording section, the leading edge of the sheet rotates at a peripheral speed faster than the conveying speed. Since the platen is guided between the recording head and the recording head in such a way that it is rolled up by the platen, the recording sheet is reliably guided to the recording section.

Further, during recording, recording is performed in a state where back tension is applied to the recording sheet due to the difference in circumferential speed between the feed member and the platen.

Detailed Example> Next, an example 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 bodies are closed.

Finally, a first casing A serving as the main body of the apparatus and a second casing B serving as its lid are pivotally attached to 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, The second housing B is configured to be released from the first housing A by the bias of the spring 2.

The first housing A is provided with sheet rolls 4a of various sizes in which recording sheets 4.5 are wound into rolls.

Two drop-in roll holders (=6.7) in which the rolls 5a can be stored individually are provided in parallel.

The recording sheet 4 stored in this roll holder 6.7,
Either one of the sheets 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 i-th body A. 9 from the rear end of the image, and is configured to be discharged from the apparatus by a pair of discharge rollers 10 also provided in the first casing A.

The recording section 8 includes a platen roller 8a that conveys the recording sheets 4 and 5 at a constant speed, and 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 both 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 sheets 4 and 5 are stored in a roll holder (hereinafter referred to as "first holder 1") 6 which is closer to the recording section. A sheet presence/absence detection sensor 13a and a sheet width detection sensor 13b are provided between the feed roller pair 11 and the platen roller Ba via the sheet guide 12.In addition, the recording unit 8 is provided with a roll holder ( A feed roller pair 4 for conveying the recording sheet 5 stored in the recording sheet 7 (hereinafter referred to as "second holder j") is provided on the second housing B side between the recording head 8b and the second holder 7. A sheet presence/absence 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 is configured such that driving force is transmitted by a motor 17 which is the same driving source.

As shown in FIG. 4, the driving force transmission structure is such that a pulley 8d is attached to one end of the shaft of the platen roller 8a, and a timing belt 17b is suspended between the pulley 8d and a pulley gear 17a of the motor 17 to achieve a predetermined deceleration. The driving force is transmitted with the ratio.

Further, an r<x-shaped lever 17c is attached to the coaxial extension of the motor rotation shaft, and is rotatable around a bending point.
A transmission gear 17d that meshes with the pulley gear 17a is attached to one end of the lever 17c. A solenoid 17e is attached to the other end of the lever 17c, and when the solenoid 17e is driven in the direction of arrow a by an electric signal, one end of the lever 17c is rotated in the direction of arrow a.

Furthermore, a switching gear 17f that rotates integrally with the transmission gear 17d is attached on a concentric shaft with the transmission gear 17d. This switching gear 17f is set when the solenoid 17e is OFF.
In the FF state, the gear ll attached to one shaft 11a of the feed roller pair 11 is biased by the spring 17g.
It meshes with b. Further, when the solenoid 17e is turned on and the lever f7c is rotated in the direction indicated by the arrow, the switching gear 17f meshes with the gear 14b attached to one shaft 14a of the pair of feed rollers 14. That is, the solenoid 17e is turned on.

By turning it off, the driving force of the king roller 17 is switched and transmitted to each pair of feed rollers 11 and 14. The feed roller pair 11.degree. 14 consists of a pair of rollers pressed against each other by springs 11c and 14c, and one roller is configured to rotate as a result of the rotation of the other roller.

Further, the driving force is transmitted to the feed roller pair 11.14 by a pulley gear 17a, a transmission gear 17d, and a switching gear 17.
f and gears llb and 14b at a predetermined reduction ratio. The motor 17 is then
The rotation peripheral speed of the platen roller 8a is set to be slightly faster than the rotation peripheral speed of the feed members 11, 14 when the platen roller 8a is driven.

Furthermore, the spring 11c of the feed roller pair 11.14.

14c and the strength of the spring 8C that presses the recording pad 8b, and the magnitude of the friction coefficient between each feed roller pair 11.14 and the platen roller 8a.
The conveying force of the recording sheet due to the feed roller pair 11.1
The recording sheet conveyance force is set to be stronger than the recording sheet conveying force according to No. 4.

Note that a control section for controlling the driving of the drive motor 17 and the solenoid 17e is provided in the first casing A, which is the main body of the apparatus.

In the figure, reference numeral 18 denotes a document transport system, and the RW! The original 19 guided on both sides by the original side guide 18b is separated one by one by the separation roller 18c, and
It is configured such that it is transported at a constant speed to the left side in the drawing by a transport roller 18d, and is discharged onto a discharge tray 18f 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 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 edge of the sheet is passed between the pair of feed rollers 14 and brought to the vicinity of the leading edge of the sheet guide 15.

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

In this operation, first, the motor 17 is driven with the solenoid 17e in the OFF state, that is, with the switching gear 17f and the gear Ilb engaged, and the feed roller 11 and the platen roller 8a are rotated in the direction of the arrow in FIG. is conveyed to a counter 9 and a pair of discharge rollers 1°, and the leading edge of the recording sheet is canted by a cutter 9. The recording sheet 4 which has been further applied with a force of 7 is ejected from the apparatus, and the platen roller 8
a. and feed roller vs. I! is 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.

Next, by turning on the solenoid 17e, the switching gear 17f is engaged with the gear 14b, and for the recording sheet 5, the feed roller 14, platen roller 8a, and cutter 9 are operated in the same manner as described above. At the same time, the leading end of the recording sheet after cutting is rewound to near the leading end of the sheet guide 15, and the solenoid 17e is returned to OFF to enter a standby state.

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, when recording, please refer to the flowchart in Figure 5 and the flowchart in Figure 6.
To explain with reference to the block diagram of the control unit shown in the figure, image information transmitted from the transmitting side is sent to the MCU via the NCU (circuit control).
It is demodulated by the ODEM (demodulator), becomes a digital signal, and is sent to the data control unit. Select one of the recording sheets 4 and 5 according to the data 0 For example, when 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 CPU ( The solenoid 17e is kept in the OFF state by a signal from the central processing unit).Next, the motor 17 is driven to rotate the feed roller pair 11 and the platen roller 8a in the direction of the arrow in FIG. 3, and the recording sheet 4 is recorded. Transfer to section 8.

At this time, the rotational peripheral speed of the platen roller 8a is slightly faster than the rotational peripheral speed of the feed roller pair 11, so the leading edge of the recording sheet 4 conveyed by the feed roller pair 11 is moved along the circular surface of the rotating platen roller 8a. and is smoothly guided to the pressure contact portion between the platen roller 8a and the recording head 8b.

This effect is more pronounced when the recording sheet is thin.

When the leading edge of the recording sheet 4 is conveyed to the recording section 8 as described above, the sheet 4 is conveyed at a constant speed by the platen roller 8a, and the received image is recorded by the recording head 8b which generates heat according to the information. be done. At this time, there is a difference in the conveying speed of the recording sheet 4 between the feed roller pair 11 and the platen roller 8a, but since the conveying force of the platen roller 8a is greater, the recording sheet 4 is conveyed at a constant speed by the platen roller 8a, and the recording sheet 4 is conveyed at a constant speed by the platen roller 8a. The feed member 11 whose circumferential speed is lower than that of the platen roller 8a causes slippage. This slippage applies hack tension to the recording sheet 4, so even if a thin recording sheet is used, wrinkles will not occur, and recording omissions will be prevented during recording.

In addition, the feed roller pair 11 and the platen roller 8a
The motor 17 that rotates the motor 17 is 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 kicks in this data. Further, the data in the RAM 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, the motor 17 is driven by a signal from the CPU to record the next line, and the feed roller pair 11 and the platen roller 8a are driven.
The recording sheet 4 is conveyed by one line. By repeating this, the predetermined recording is completed.

When the recording of the 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 from the apparatus by a pair of discharge rollers 10, and the motor 17 is activated. The recording sheet 4 is rotated in the opposite direction to rewind the leading edge of the recording sheet 4 to the standby position, thereby completing the A4 size reception recording.

When recording the above, the number of recorded lines is counted,
When rewinding after cutting the recording sheet 4, the platen roller 8a and the pair of feed rollers 11 are rotated in reverse according to the count number to rewind the leading edge of the recording sheet 4 to a predetermined standby position.

If the received image is 84 size, the sheet width detection sensor 16b detects that the recording sheet 5 is B4 size, and the solenoid 17e is turned on by a signal from the CPU. Thereafter, in the same manner as described above, the motor 17d is driven to rotate the feed roller pair 14 and the platen roller 8a to perform predetermined recording, and when the recording sheet 5 returns to the standby position, the solenoid 17e is turned off.
Make it.

In conveying the recording sheet 4 or 5 as described above,
Since it can be transported by one motor 17 and its switching mechanism is simple, the drive system can be constructed in a small space and electrical control can be performed very easily.

In addition, when clearing a jam, when the second casing B is opened, the recording sheet 4 is separated into the first casing A, and the recording sheet 5 is separated into the second casing B. Therefore, when clearing a jam on one recording sheet, the other The recording sheet does not get in the way, allowing smooth processing.

<Other Embodiments> In the above-mentioned embodiments, an example was shown in which the platen and the feed member were each made up of roller-like members, but as another example, they may also be made up of a rotating heald suspended on a booth or the like. good.

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 also be applied to a recording device that accommodates only one sheet roll.

<Effects of the Invention> As described above, the present invention is configured such that the circumferential speed of the platen is slightly faster than the circumferential speed of the feed member, so that when the leading edge of the recording sheet is fed into the recording unit, the leading edge smoothly reaches the recording unit. Therefore, it is possible to ensure feeding and conveyance of the recording sheet.

In addition, since the platen and feed member are transported by the same drive source, the space for the drive system is reduced, making the entire device more compact, and the drive system can be easily controlled electrically. has.

[Brief explanation of the drawing]

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 FIG. 3 is a cross-sectional explanatory view when both cylindrical bodies are closed. FIG. 4 is an explanatory diagram showing the driving force transmission configuration, FIG. 5 is a flowchart of the recording operation, and FIG. 6 is a block explanatory diagram of the control section. A is the first housing, B is the second housing, 1 is the shaft, 2 is the spring, 3 is the hook, 4.5 is the recording sheet, 4a, 5a° are the sheet rolls, 6.7 is the roll holder, 8 is Recording section, 8a is a platen roller, 8b is a recording head, 8C is a spring,
8d is a pulley, 9 is a cutter, 10 is a pair of discharge rollers, 1
1 is a pair of feed rollers, lla is a shaft, llb is a gear, l
lc is a spring, 12 is a sheet guide, 13a is a sheet presence detection sensor, 13b is a sheet width detection sensor, 14 is a feed roller pair, 14a is a shaft, 14b is a gear, 14c
is a spring, 15 is a seat guide, 16a is a seat presence detection sensor, 16b is a seat width detection sensor, 17 is a motor, 17a is a pulley gear, 17b is a timing belt, 17c is a lever, 17d is a transmission gear, 17e is a solenoid, 17f is a Switching gear, 17g is spring, 1
8 is a document conveyance system, 18a is a document placement table, 18b is a document side guide, 18c is a separation roller, 18d is a conveyance roller, 18e is an ejection roller, 18 is an ejection tray, 19 is a document, 20 is a document reading system, 20a 20b is a mirror, 20c is a lens, and 20d is an image reading element.

Claims (1)

[Claims] It has a feed member that transports the recording sheet to a recording section consisting of a platen and a recording head, and the platen and the feed member are driven by the same drive source to transport the recording sheet to the recording section and respond to image information. A recording device for recording an image using a drive source, characterized in that a deceleration system for the platen and the feed member from the drive source is set so that the rotational peripheral speed of the platen is faster than the rotational peripheral speed of the feed member. Recording device.