JPH0432453A - Curl removing device in recording device - Google Patents

Abstract

PURPOSE:To unify curl removing performance in a curl removing device for a facsimile or t like by guiding recording paper conveyed into a cutting means by a guide member formed to provide the recording paper with a reverse curl to the rolled curl generated to the recording paper. CONSTITUTION:More on the downstream side in the conveying direction of recording paper 3 than a recording part, there is provided a guide member formed of two paper guides 6a, 6b curved reversely to the curled direction of the roll like recording paper 3 so as to guide the recording paper 3 to an automatic cutter device 6. In this constitution, the conveyed recording paper 3 is provided with tension between a paper discharge roller 7 and a platen roll 4 and slides on the curved face of the paper guide 6a so as to be provided with a reverse curl to the roll like curl, and thus stable curl removal can be performed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a curl removal device for removing curls from rolled recording paper used in recording devices such as facsimiles.

:Prior Art] Conventionally, in a recording device that records figures, characters, etc. on a roll of recording paper, a device for removing curls from the recording paper has been used to load the recording paper and to record the recording paper. A curl removing member (curl removing roller) is provided between the platen that is conveyed to the recording section, and when the recording paper is pulled out by this platen, the curl removing member squeezes the recording paper in the opposite direction to the curl of the rolled recording paper. There is a known method for removing curls.

This type of conventional curl removing device will be explained using FIG. 2. A dedicated curl removing member 10 is provided between the recording paper holder 2 and the platen roller 4 of the recording section, and Tension is applied to the recording paper 3 by the weight and rotation of the platen roller, and the same member 1 is
0 was removing the curl by pushing the curl of the recording paper 3 in the opposite direction. Therefore, as the remaining amount of the recording paper 3 wound on the roll decreases and its weight becomes lighter, the tension applied to the curl removal member 10 becomes weaker, and the curling property of the recording paper 3 wound on the roll becomes more and more tight. In spite of this, the force with which the recording paper 3 is squeezed becomes weak and curl removal is not performed. Furthermore, even in the standby state, the recording paper 3 is always applied tension in a curved state in the opposite direction to the rolled direction at the point where it hits the curl removal member 10, which results in reverse curling. Ta.

[Problem to be Solved by the Invention] However, in the curl removal device of the recording device configured as described above, as the remaining amount of the recording paper wound on the roll decreases, the weight of the roll portion of the recording paper decreases. As the paper becomes lighter, the tension of the recording paper where it hits the curl removal member becomes weaker, so even though the curling of the recording paper wound on the roll becomes more and more tight, the force used to squeeze the recording paper becomes weaker. It was difficult to completely remove the curls.

It is also possible to apply back tension to the recording paper in order to maintain the tension of the recording paper where it hits the curl removal member, but this requires the addition of a special device, and the back tension is applied to the platen. This increases the load on the recording paper drive source that drives the recording paper.

Furthermore, if the recording paper loaded in the recording device is not used for a long time, the portion of the recording paper that is in contact with the curl removal member will be reversely curled.

The present invention has been made to solve the above-mentioned problems, and it is possible to obtain a curl removal function without adding a complicated configuration to the recording device, and also to reduce the remaining amount of rolled recording paper. To provide a curl removing device in a recording apparatus that can maintain constant curl removing performance by applying a constant tension to the recording paper at a location where it hits a curl removing member regardless of the situation.

[Means for Solving the Problems 1] In order to achieve the above object, the present invention comprises a platen roller and a recording head that is in pressure contact with the platen roller, and a recording paper wound in a roll is carried in, so that the recording In a recording apparatus equipped with a recording means for recording figures, characters, etc. on paper, and a cutting means located downstream of the recording means in the conveyance direction of the recording paper and cutting the recording paper, the record carried into the cutting means A guide member is provided for guiding the paper, and this guide member has a shape that can give the recording paper a curl opposite to the roll-like curl described above.

Also, the recording paper is placed in a recording device downstream of the cutting means in the conveying direction of the recording paper! A paper ejection roller is provided to eject the paper outside the main body, and the recording paper is held between the paper ejection roller portion and the platen roller portion, and a predetermined tension is applied to the recording paper between these two portions. You can.

[Function] According to the invention of claim 1, the recording paper wound into a roll is guided to the cutting means by the guide member after characters and the like are recorded by the recording means.

During this guided process, the recording paper is squeezed so as to give the opposite curl to the rolled curl depending on the location where the guide member hits, and the curl of the recording paper is removed.

Further, according to the invention of claim 2, in the recording paper being conveyed, the tension is applied between the paper ejection roller and the platen roller, so it is constant regardless of the remaining amount of the recording paper wound in a roll. becomes. Further, in the operation standby state, the recording paper is held between the recording means but not between the paper ejecting rollers, so that no tension is applied to the recording paper.

Second Embodiment A curl removal device of the present invention will be described below with reference to FIG. 1, which shows a schematic configuration of a facsimile machine equipped with the same device.

A roll of recording paper 3 is stored in a recording paper holder 2 provided at the rear of the main body of the facsimile 1. In the initial setting, the leading edge 3a of the recording paper 3 is pulled out toward the front.
an auto cutter device (cutting device) 6 which is sandwiched between a platen roller 4 constituting a recording section (recording device) and a recording head 5 that is in pressure contact with the platen roller and which cuts the recorded recording paper;
The paper passes between the paper ejection roller 7 and the presser roller 8 and is pulled out to the recording paper ejection port on the front lower surface of the main body.

Further, a guide member for guiding the recording paper 3 from the recording section to the auto cutter device 6 is provided downstream of the recording section in the conveyance direction of the recording paper 3. This guide member is composed of two paper sheets a curved in a direction opposite to the curling direction of the rolled recording paper 3.

6b, which are collectively provided in the auto cutter device 6. The auto cutter device 6 has a rotary blade 6C.
and a fixed blade 6d.

Further, the paper ejection roller 7 is connected to a paper ejection roller shaft 7a via a torque limiter (not shown), which will be described later, and the roller shaft 7a is further connected to a drive source (not shown). In addition, at the front of the main body, there is a document feeding section 11 that feeds the document to be transmitted.
A reading unit 12 and the like for reading the original are provided.

In the above configuration, when the facsimile 1 starts receiving data, the platen roller 4 starts to rotate by a drive source (not shown), and as a result of this rotation, the recording paper 3 is moved from the leading edge 3a to the recording head 5, while figures, characters, etc. are recorded on the recording paper 3. , are sent out one after another.

The leading edge 3a of the recording paper 3 passes through the guide member, is sent to the auto cutter device 6, is further conveyed by a paper discharge roller 7 and a presser roller 8 located downstream in the conveyance direction, and is conveyed from the recording paper discharge port to the device. It is discharged to the outside of the main body 1.

Further, when receiving a signal from the facsimile 1, the paper ejection roller shaft 7a is rotated by an unillustrated drive source, similar to the platen roller 4 described above, and this rotational force causes the paper ejection roller 7 to rotate.
is driven to rotate. Therefore, the recording paper 3 is conveyed while being held between the paper ejection roller 7 and the platen roller 4. Here, the rotational speed of the paper ejection roller shaft 7a is set so that the circumferential speed of the paper ejection roller 7 is slightly faster than the circumferential speed of the platen roller 4. Therefore, in an attempt to send either the paper discharge roller 7 or the recording paper 3 faster than the platen roller 4, tension is applied to the recording paper 3 between the paper discharge roller 7 and the platen roller 4. When the recording paper 3 is conveyed under tension in this manner, the recording paper 3 slides on the curved surface of the paper guide a. As a result, the recording paper 3 is squeezed at the curved portion of the paper guide a, giving it a curl opposite to the roll-like curl described above. Thus, the platen roller 4, the curl removing member 6a, the paper discharge roller 7, etc. constitute a curl removing device.

Note that the above-mentioned torque limiter transmits the rotation of the paper ejection roller shaft 7a as is to the paper ejection roller when a large rotational load is not applied to the paper ejection roller. In this case, the paper ejection roller 7 and the paper ejection roller shaft 7a slip, and the rotation of the paper ejection roller shaft 7a is not transmitted to the paper ejection roller rough. Therefore, when a slip occurs, the actual conveyance speed of the recording paper 3 becomes the same as the circumferential speed of the platen roller 4.

After receiving the specified amount, the recorded portion of the recording paper 3 will be
The sheet is cut by the rotary blade 6c and fixed blade 6d of the automatic cutter device 6, and is discharged from the recording paper discharge port. Then, when the unrecorded portion of the recording paper 3 is received, it is sent out again by the rotation of the platen roller 4 in the same way as at the time of starting the reception described above.On the other hand, when the reception is completed and the recording paper 3 returns to the standby state, the same Only the roller 4 is used for feeding. In the standby state, no tension is applied to the recording paper 3, so it will not remain squeezed by the paper guide a, and will not be reversely curled.

The curl removal device of this embodiment is configured with a guide member 6a that is a part of the auto cutter device 6 downstream of the conveyance of the recording section, so there is no need to add a special member, and unlike conventional curl removal devices, , recording paper 3 wrapped in a roll
Regardless of the remaining amount of the recording paper 3, the tension of the recording paper 3 against the curl removal member 6a remains constant, and the force for squeezing the recording paper 3 is maintained, making it possible to remove five curls.

2. Effects of the Invention As described above, according to the invention of claim 1, since the guide member for guiding the recording paper to the cutting means is used as a component of the curl removing device, a member exclusively for removing curls is used. There is no need to newly provide it, and it can be easily incorporated into the device, resulting in low cost.

Further, according to the invention of claim 2, since tension is applied to the recording paper between the platen roller and the paper ejection roller, the recording paper is applied with a constant force at the place where the guide member hits, regardless of the remaining amount of the recording paper. This results in stable curl removal performance.

Furthermore, since there is no need to apply pack tension to the recording paper holder side in order to apply the tension, there is no need to increase the load on the drive source of the platen roller, etc. Further, in the operation standby state, no tension is applied to the recording paper, so that it is possible to always obtain appropriate curl removal performance without causing reverse curling due to the curl removal member as in the conventional case.

[Brief explanation of the drawing]

FIG. 1 is a schematic cross-sectional view of a facsimile equipped with a curl removing device according to an embodiment of the present invention, and FIG. 2 is a schematic cross-sectional view of a facsimile equipped with a conventional curl removing device. 1...Facsimile, 2...Recording paper holder, 3...
・Rolled recording paper, 4...platen roller, 5...
Recording head, 6... auto cutter device, 6a... vapor guide (guide member), 6b... paper guide,
7... Paper ejection roller, 8... Presser roller.

Claims (2)

[Claims] (1) A recording means that is composed of a platen roller and a recording head that presses against the platen roller, and records figures, characters, etc. on the recording paper by carrying in a roll of recording paper; A recording apparatus including a cutting means that is located downstream in the conveying direction of the recording paper and cuts the recording paper, further comprising a guide member that guides the recording paper carried into the cutting means, and this guide member is configured to cut the recording paper. A curl removal device for a recording device, characterized in that the device has a shape capable of giving a curl opposite to the above-mentioned roll-like curl. (2) A paper discharge roller for discharging the recording paper out of the recording apparatus main body is provided downstream of the cutting means in the conveyance direction of the recording paper, and the recording paper is sandwiched between the paper discharge roller portion and the platen roller portion. 2. The curl removing device for a recording apparatus according to claim 1, wherein the recording paper is configured to have a predetermined tension between both portions.