JPS63106259A - 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 feed members faster than that of the platen roller. CONSTITUTION:A motor 17 rotates a transmission gear 17d through a gear l7a reducing a rotary speed of the transmission gear 17d. Rotation of the transmission gear 17d is transmitted to a gear 11b or a gear l4b through a selector gear 17f, and a recording sheet 4 or 5 is fed to a recording head 8b by driving paired rollers 11a, 11c or 14a, l4c. The selector gear 17f is controlled by a solenoid l7e. While the motor 17 reduces its rotation through a belt l7b and a pulley 8d, and a platen roller 8a is rotated slower than the paired rollers 11a, 14a. In this way, the recording sheet, whose point end is forcedly fed into a platen, is surely conveyed, and the whole device, resulting in the use of one single motor, is formed in small size.

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 is complicated, and the method of setting the recording sheet is also complicated and 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, the gap between the platen roller and the recording head is adjusted. There were problems such as not being able to enter the feed, resulting in a feed error.

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> The means of the present invention for solving the above-mentioned conventional problems includes a feed member for conveying a recording sheet to a recording section consisting of a platen and a recording head, and A recording device that conveys a recording sheet to the recording section by driving both of them with the same drive source and records an image according to image information, wherein the rotational peripheral speed of the feed member is higher than the rotational peripheral speed of the platen. 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.

<Operation> According to the above means, when the leading edge of the recording sheet is fed into the recording section by the feed member, the recording sheet is fed faster than the circumferential speed of the platen, so the leading edge of the sheet is forced into the gap between the platen and the recording throat. This allows the recording sheet to be reliably conveyed to the recording section.

<Embodiment> Next, an embodiment in which the above means is applied to a double roll type facsimile machine will be explained.

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 cylindrical bodies 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 structure is such that the second housing B is released from the first seven bodies A by the bias of the spring 2.

Further, the first housing A has a drop-in roll holder 6.7 that can individually store sheet rolls 4a and 5a of various sizes in which recording sheets 4.5 are wound into rolls.
are installed in parallel. This roll holder6.
One of the recording sheets 4 and 5 stored in the storage unit 7 is conveyed to the recording unit 8 according to a selection signal from the control unit, a predetermined image is recorded in the recording unit 8, and the recording sheet after recording is transferred to the recording unit 8. The image is cut from the rear end by a cutter 9 provided in one casing A, and is ejected from the apparatus by a pair of ejection rollers 10 also provided in the first casing A.

The recording section 8 includes a platen roller 8a that conveys the recording sheet 4.5 at a constant speed, and a recording sheet that is in pressure contact with the platen roller 8a as shown in FIG. It is composed of a line type recording gutter 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 casings 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 and 5 are conveyed to the recording section 8 by a pair of feed rollers and feed rollers, respectively, and the recording sheets 4 and 5 are conveyed to the recording section 8 by a pair of feed rollers, which are feed members. A sheet presence/absence detection sensor 13a and a sheet width detection sensor 13b are provided between the feed roller pair 11 that conveys the sheet 4 and the platen roller 8a via a sheet guide 12. Holder (hereinafter referred to as "second holder")
The pair of feed rows 14 that conveys the recording sheets 5 stored in the recording sheets 7 (hereinafter referred to as "feed rows") are located on the second housing B side and are connected to the recording head 8.
b and the second holder 7, and also between the feed roller pair 14 and the recording head 8b.
A sheet presence/absence sensor 16a and a sheet width detection sensor 16b are provided via the sensor.

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<1-shaped lever 17c that is rotatable about a bending point is attached coaxially with the motor rotation axis, and a transmission gear 17d that meshes with the pulley gear 17a is attached to one end of the lever 17c. There is. 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.

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 this state, the feed roller pair 11 is engaged with a gear llb attached to one shaft 11a of the pair of feed rollers 11 due to the bias of the spring 17g. Further, when the solenoid 17e is turned ON and the lever L7c is rotated in the direction indicated by the arrow, the switching gear 17'' is switched to one shaft 1 of the pair of feed rollers 14.
It meshes with gear 14b attached to gear 4a. That is, by turning on and off the solenoid L1e, the motor 1
The driving force of 7 is switched and transmitted to each pair of feed rollers 11 and 14. The pair of feed rollers 11.14 consists of a pair of rollers pressed against each other by springs 11c and 14c, and one roller is configured to rotate as the other roller rotates.

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 feed roller pair 11.14 is set to be slightly faster than the rotation peripheral speed of the platen roller 8a when the feed roller pair 11.14 is driven.

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, in which the document vn formed on the upper surface of the second housing B is placed on the table 18a, and the 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 18f by a discharge roller 18e.

Also, while the original 19 is being conveyed, the original reading system 20
The reflected light passes through a plurality of mirrors 20b and lenses 20c to an image reading element 2Qd such as a CCD, where the image of the document 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 140 to reach near the leading edge of the sheet guide 15.

After setting 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 and the section switching gear 17f and gear Ilb engaged, and the feed roller 11 and platen roller 8a are rotated in the direction of the arrow in FIG. 4 is conveyed to a cutter 9 and a pair of discharge rollers 10, and the cutter 9 cuts the leading edge of the recording sheet. Furthermore, the cut recording sheet 4 is discharged to the outside of the apparatus, and the platen roller 8
a and the feed roller pair 11 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 placed in a standby state.

Next, by turning on the solenoid 17e, the switching gear 17 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 as cutting the leading edge of the recording sheet, the leading edge of the cut recording sheet is rewound to the vicinity of the leading edge of the sheet guide 15, and the solenoid 11e is returned to the OFF state to be in 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 explanatory diagram of the control unit shown in the figure, image information transmitted from the transmitting side is demodulated by the MODEM (demodulation unit) via the NCU (circuit control), becomes a digital signal, and is sent to the data control unit. is sent. Depending on the data, one of the recording sheets 4.5 is selected. For example, when receiving A4 size image information, the sheet width detection sensor 13
b detects that the width of the recording sheet 4 is A4 size, and the solenoid 17e is maintained in the OFF state by a signal from the CPU (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 conveyed to the recording section 8.

At this time, the rotational circumferential speed of the feed roller pair 11 is slightly faster than the rotational circumferential speed of the platen roller 8a, so the leading edge of the recording sheet 4 conveyed by the feed roller pair 11 is the pressure contact area between the platen roller 8a and the recording head 8b. be forcibly sent to. The effect of forced insertion becomes more pronounced when the recording sheet is thick, that is, has a strong stiffness.

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 recording head 8 generates heat according to the image information.
The received image is recorded by b.

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
The AM takes in this data, and 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 RAD driver for recording, 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 out of the apparatus by the discharge roller pair IO, 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.

Note that during the above recording, the peripheral speed of the feed roller pair 11 is set to be slightly faster than the peripheral speed of the platen roller 8a, so the recording sheet 4 becomes slack between the feed roller pair 11 and the platen roller 8a. This slack wall becomes larger as the recording length becomes longer, but the control section measures the recording length, that is, counts the number of recording lines, and adjusts the amount of rotation of the feed roller pair 11 according to the counted number during rewinding. The leading edge of the recording sheet 4 is always rewound to the normal standby position to prevent the recording sheet from sagging.

If the received image is 84 size, the sheet width detection sensor 16b detects that the recording sheet 5 is 84 size, and the solenoid 17e is turned on by a signal from the CPU. Thereafter, in the same manner as described above, the motor 17 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.

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 housing B is opened, the recording sheet 4 is separated into the first housing A, and the recording sheet 5 is divided into the second housing B, so when cleaning a jam on one recording sheet, Smooth processing can be performed without the other recording sheet getting in the way.

<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 be made up of a rotating belt suspended from a pulley 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 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 peripheral speed of the feed member is slightly faster than the peripheral speed of the platen, so that when the leading edge of the recording sheet is fed into the recording unit, the leading edge is not forced into the recording unit. Therefore, it is possible to ensure the 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 with the first housing A and the second housing B open, FIG. 2 is a cross-sectional explanatory view thereof, and FIG. 3 is a cross-sectional explanatory view with both housings closed. FIG. 4 is an explanatory diagram showing the driving force transmission configuration, FIG. 5 is a flowchart of the recording operation, and the sixth is a block 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, 4.5 is a recording sheet, 4a and 5a are sheet rolls, 6 and 7 are roll holders, 8 is a recording section, 8a is a platen roller, 8 and b are recording heads, 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, Ila is a shaft, llb is a gear, I
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
18a is the document conveyance system, 18a is the document placement table, 18b is the document side guide, 18c is the separation roller, 18d is the conveyance roller, 18e is the ejection roller, 18f is the ejection tray, 19 is the document, 20 is the document reading system, 20a is the 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 the 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 feed member is faster than the rotational peripheral speed of the platen. Recording device.