JPH0449154A - Recorder - Google Patents

Abstract

PURPOSE:To substantially reduce a curl, generated in a sheet, by providing a control means for controlling a sheet conveying means in a manner wherein a recording image rear end of the sheet is fed out by a fixed amount from a discharge port, after recording is finished, and then fed back by the fixed amount to place the sheet in a standby condition. CONSTITUTION:A sheet conveying means 1 is controlled by a control means 11 so as to place a sheet in a standby condition in such a manner that a recording image rear end of the sheet is fed out by a fixed amount from a discharge port, after recording is finished, and fed back by the fixed amount. A curl is prevented from being easily generated in the sheet even when this standby condition lasts for a long time by relaxing tension applied to the sheet by this standby condition.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a nailing device that performs recording using a roll sheet.

<Prior Art> Today, recording devices such as facsimile machines and printers are widely used, and many of these devices use roll sheets wrapped around long sheets. In the apparatus, it is necessary to cut the sheet after recording from the trailing edge of the image. As a configuration for this purpose, a cutter is built into the device, and the above-mentioned force 2 is applied when the sheet is ejected.
There is a configuration that cuts by driving the motor. Although this configuration has the advantage of automatically cutting the sheet, the cutter and the drive system for driving it must be housed within the device, which limits the ability to miniaturize the device. there were.

On the other hand, there is a device in which the user holds the sheet discharged from the discharge port, presses the sheet against either the upper or lower edge of the discharge port, and cuts the sheet by hand. With this configuration, since a cutter and cutter drive system are not required as described above, the device can be miniaturized.

<Problems to be Solved by the Invention> However, in the configuration in which the sheet is manually cut at the edge of the ejection port, after recording is completed, the sheet is fed out until the trailing edge of the recorded image reaches the edge of the ejection port, and the sheet is placed in a standby state. The sheet is cut from the trailing edge of the image by pressing against the edge.

For this reason, if the sheet conveying path is bent as shown in FIG. 7, the recording sheet 50 is under tension in the bent state in the standby state. Therefore, if the standby state continues for a long time, there is a problem that the recording sheet 5 (l) is curled due to the bending.

The curl is produced when the device environment is at a temperature of 15-25°C and a humidity of 30-25°C.
Even in a general state of about 60%/RH, the recording sheet 50 will curl, and the smaller the radius of curvature of the guide member 51, the stronger the curl will be.

It is an object of the present invention to provide a recording device that solves the conventional tJB problem, alleviates the tension on the sheet in the standby state, and prevents the sheet from curling even if the standby state continues for a long time. It is something to do.

<Means for Solving the Problems> A typical means according to the present invention for solving the above problem includes a sheet conveying means for conveying a roll sheet,
a recording means for recording on the conveyed sheet;
an ejection port for ejecting the recorded recording sheet;
a cutter section provided at the edge of the discharge port for cutting the discharged sheet; and a cutter section provided at the edge of the discharge port for cutting the discharged sheet; The present invention is characterized in that the recording apparatus is configured by providing a control means for controlling the sheet conveyance means to put it in a standby state.

<Function> In the above means, after the sheet is fed out after recording is completed, the sheet is fed back a certain amount to control the conveyance so that the trailing edge of the image reaches a part of the cant. This tension is relaxed, and as a result, the sheet is less likely to curl even if the sheet remains on standby for a long time.

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

FIG. 1 is an explanatory diagram of the internal structure of a facsimile machine, and FIG. 2 is an explanatory perspective diagram of its external appearance.

First, the overall structure of this apparatus will be explained. In FIG. 2 and FIG. ! The original 2 placed on the table 1a is separated one by one by a preliminary transport roller 1b and a separation roller 1c,
d and the discharge port to the discharge port] e in the direction of the arrow a in FIG. 1, and is discharged onto the discharge tray 1f.

The conveyed document 2 is configured so that written information can be read by a reading system 3. That is, the light source 3a irradiates the original 2 transported by the original transport system 1,
The reflected light passes through multiple mirrors 3b and lenses 3c to a photoelectric conversion element 3d such as a CCD, converts the original reading information into an electrical signal, and transmits it to the recording system of another machine when in facnomy mode. However, when in copy mode, the data is configured to be transmitted to its own recording system.

The recording system 4 is configured to perform recording based on the transmitted information. To explain the configuration of this recording system 4, in this embodiment, a heat-sensitive recording method is used, and a roll sheet 5 made by winding a long recording sheet that develops color by heat into a roll is housed in a roll holder 4a. However, it is configured so that recording is performed on this recording sheet 5.

The roll holder 4a is provided in a main body 6 of the apparatus, and a lid 7 is configured to be able to be opened and closed about a shaft 8 with respect to the main body 6 of the apparatus. A platen roller 4b serving as sheet conveying means is attached to the apparatus main body 6 side, and is configured to be driven and rotated by a platen motor consisting of a stepping motor (not shown). On the other hand, a recording head 4 constituting a recording means is provided on the lid body 7 side.
C is attached to the head 4C, and a plurality of heating elements that generate heat when energized are arranged in a line in the width direction of the sheet 5. When the lid 7 is closed, the recording head 4c and the platen roller 4b are brought into pressure contact with each other by the urging force of the pressing spring 4d.

Therefore, when the recording sheet 5 is sandwiched between the platen roller 4b and the recording head 40 and the platen roller 4b is rotated in the direction of the arrow in FIG. 1, the recording sheet 5 is conveyed by the frictional force of the roller 4b, and synchronized with this conveyance. recording head 4
By generating heat in C according to the read information, recording is performed on the recording sheet 5 according to the read information, and the sheet 5 after recording is
is discharged from the discharge port 9.

A bent guide member 4e is provided on the sheet conveyance path from the roll holder 4a to the platen roller 4b, and when the recording sheet 5 is guided by the guide member 4e, it bends downward, thereby forming a roll. It is configured to remove curls from a sheet wrapped around the sheet.

Further, a cutter portion 10 for cutting the sheet 5 is formed at the lower edge portion constituting the discharge port 9. Therefore,
When the sheet 5 discharged from the discharge port 9 is held and pulled downward, the sheet 5 is cut by the cutter section 10.

In the apparatus having the above configuration, when the image recording is completed, the recording sheet 5 is fed out by the length /l+z2 shown in FIG.
Thereafter, the robot is controlled to be in a standby state after being sent back for the length of 12 minutes.

Next, a control means for controlling the conveyance of the recording sheet 5 as described above will be explained.

FIG. 3 is a block diagram of the control system, and FIG. 4 is a flowchart showing the transport control procedure.

In FIG. 3, 11 is a control unit, and the CPU 11a
, ROM11b, RAM11c, and counter Ild.

The CPU 11a is a central processing unit, and the ROM (described later)
11b and other external devices 12 such as facsimile devices that transmit image signals,
It performs necessary calculations and judgments, and performs various controls.

ROMllb is a read-only memory, and the CPU
For example, data such as the program shown in the flowchart of FIG. 4 and various other programs are stored for the operation of 11a.

The RAM 11c is a read/write memory, and the CP
It consists of a working area where U11a temporarily stores data in commands and calculation results, a buffer area where various data input from external devices 12, etc. are stored.

The control unit 11 receives image signals from the external device 12 or the document reading system 3 and the panel creation panel 1 via the interface 13.
Input the instruction signal etc. from 4. Further, the control section 11 outputs drive signals to the document conveyance system 1, a motor driver 16 of a platen motor 15 that drives the platen roller 4b, and a head driver 17 that drives the recording head 4c, respectively.

Next, the sheet conveyance procedure based on signals from the control section 11 will be explained with reference to the flowchart of FIG.

Step 31. Recording is executed in S2.

As described above, this recording operation is performed by driving the platen motor 15 in normal rotation to rotate the platen roller 4b in the direction indicated by the arrow in FIG. An image is recorded on the sheet 5.

When the recording operation is completed, in steps 33 to S6, the platen motor 15 is driven to rotate m1 steps in the forward direction,
The recording sheet 5 is fed out so that the trailing edge of the image protrudes further from the discharge port 9 by a certain amount (length 12 minutes in FIG. The structure is such that the length At+112 shown in FIG. 1 is sent out.

Next, in steps S7 to S10, the platen motor 1
5 is reversely driven a number of m steps, the recording sheet 5 is fed back by the predetermined amount, and placed in a standby state. Furthermore, the motor 1
5 is reversely driven by a number of m2 steps, the recording sheet 5 is transported back by a length of 12 minutes as shown in FIG.

When the recording sheet 5 is fed back by the length Ilz, the trailing edge of the image reaches the edge of the discharge port 9. If the recording sheet 5 is cut by hand in this state, the sheet 5 will be cut from the trailing edge of the image. The Rukoto. Since the sheet roll is not wound up during the feeding and returning, the recording sheet 5 is in a state of being slackened by the amount of feeding back in the standby state as shown by the two-dot chain line in FIG. Forming a radius of curvature created by the average load due to gravity away from member 4e. This radius of curvature is much larger than that in which the guide member 4e is forced to follow the guide member 4e under tension. Therefore, even if the standby state continues for a long time, the recording sheet 5 is less likely to curl.

[Other Examples]

In the embodiment described above, an example was shown in which the rear end of the image is sent out a certain amount from the discharge port 9 and then sent back by the certain amount to be in a standby state, but the conveyance may be controlled as shown in the flowchart of FIG.

In the flowchart of FIG. 5, steps S11 to S51
6 is the step S1 to step S1 of the flowchart of FIG. 4 mentioned above.
This is the same as S6, and after the end of recording, the sheet 5 is fed out by the length zl +12 shown in FIG. It will run for 12 minutes.

Next, when feeding the sheet 5 back, in this embodiment, the platen motor 1
5 is reversely driven by the number of steps m, and in addition to the length 12 which becomes the first transport amount, the length i which becomes the second transport amount! When the motor 15 is reversely driven for 3 minutes and the number of steps is m, the recording sheet 5 is moved back to the length i2 + iB shown in FIG.
It is configured to send back minutes.

As a result, the trailing edge of the image returns to the inside of the apparatus from the discharge port 9 for a length of 13 minutes.

Next, as shown in steps 521 to S24, the platen motor 15 is driven in forward rotation by the number of m4 steps to feed the platen for a length of 13 minutes, which is the second conveyance amount, and is placed in a standby state. The recording sheet 5 is so constructed that when the motor 15 is driven in forward rotation by m4 steps, the recording sheet 5 is fed out by a length of 13 minutes as shown in FIG. As a result, the trailing edge of the image reaches the edge of the discharge port 9, and the sheet 5 waits in a relaxed state as shown by the two-dot chain line in FIG. prevent.

When the conveyance is controlled as in this embodiment, even if there is a large backlash in the drive transmission gear from the platen motor 15 to the platen 4b, for example, the trailing edge of the image can be accurately delivered to the cutter section 10 of the discharge port 9. Become.

Further, in the above-described embodiment, a conveying force is applied to the sheet 5 by the cooperative action of the platen roller 4b and the recording head 4c as sheet conveying means, but it is also possible to use a completely separate conveying roller pair or the like. It is also possible to use a rotating endless belt instead of a roller-like one.

Furthermore, in the above-mentioned embodiment, the recording method was exemplified by the raging heat recording method, but there is no need to be limited to this, and various other recording methods can be used, such as a thermal transfer recording method that uses an ink sheet. be.

Furthermore, the recording apparatus according to the present invention is not limited to the above-mentioned facsimile machine, and can be applied to other recording apparatuses such as printers.

<Effects of the Invention> As described above, in the present invention, the sheet after recording is sent out and discharged, and then fed back by a certain amount to create slack in the sheet inside the device, thereby significantly reducing the curling of the sheet. It is possible to reduce this.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the internal configuration of a facsimile machine according to an embodiment of the present invention, Fig. 2 is an explanatory perspective view of its external appearance, Fig. 3 is a block diagram of the control system, and Fig. 4 shows the seal ejection procedure. Flowchart, FIG. 5 is a flowchart showing the sheet ejection procedure according to another embodiment, FIG. 6 is an explanatory diagram showing the feeding and feeding back lengths in the sheet ejection procedure, and FIG. 7 is an explanatory diagram of the prior art. be. 1 is a document conveyance system, 1a is a document placement table, 1b is a preliminary conveyance roller, 1c is a separation roller, 1d is a conveyance roller, 1e is an ejection roller, 1r is an ejection tray, 2 is an original, 3 is a reading system,
3a is a light source, 3b is a mirror 3C is a lens, 3d is a photoelectric conversion element, 4 is a recording system, 4a is a roll holder, 4b is a platen roller, 4c is a recording head, 4d is a pressing spring, 4e is a guide member, 5 is a recording A sheet, 6 is the device body, 7 is the lid, 8 is the shaft, 9 is the discharge port, 10 is the cutter part,
11 is a control unit, lla is a CPU, Ilb is a ROM, ll
c is RAM, lid is counter, 12 is external device, 13
14 is an interface, 14 is an operation panel, 15 is a platen motor, 16 is a motor driver, and 17 is a head driver. Figure 2 Figure 3 Figure 4

Claims (2)

[Claims] (1) A sheet conveying means for conveying a rolled sheet, a recording means for recording on the conveyed sheet, an ejection port for ejecting the recorded recording sheet, and an edge of the ejection port. a cutter section for cutting the ejected sheet; and a cutter section for feeding out a trailing edge of the recorded image of the sheet from the discharge port by a certain amount after recording is completed, and then feeding it back by the certain amount to put it in a standby state. A recording apparatus comprising: a control means for controlling the sheet conveyance means. (2) A sheet conveying means for conveying a roll sheet, a recording means for recording on the conveyed sheet, an ejection port for ejecting the recorded recording sheet, and an edge of the ejection port. a cutter section for cutting the ejected sheet; a cutter section for sending out the trailing edge of the recorded image of the sheet from the discharge port by a first conveyance amount after recording is completed, and then sending it back by the first conveyance amount;
A recording apparatus comprising: a control means for controlling the sheet conveyance means to send the sheet back by a second conveyance amount and further to send the sheet by the second conveyance amount.