JPH0925036A - Recording device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remove winding behavior of roll paper well even the position of recording paper drawn out from roll paper changes as its remaining quantity becomes smaller. SOLUTION: A curl correction member 12 fitted so as to give bending, in an opposite direction to the winding direction, to recording paper 2 drawn out from roll paper 1 by a conveyance roller 3 is retained on a rotating shaft 14 rotatably-mounted at a fixed position through a supporting arm 15. The torque is made to work upon the rotating shaft 14 in such a direction as to press the curl correction roller 12 against the recording paper 2, and when the remaining amount of roll paper 1 becomes small and the delivery position of the recording paper 2 changes, the curl correction member 12 moves with the change to always give appropriate bending to the recording paper 2. It is thus possible to remove winding behavior well.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording device wound with a roll of recording paper, that is, a roll paper.

[0002]

2. Description of the Related Art Conventionally, there is a recording apparatus in which an accommodating section for accommodating roll paper is provided in the apparatus, and the recording paper is pulled out from the roll paper set in the accommodating section and conveyed to the printing section to perform a recording operation. In such a recording apparatus, a curl removing mechanism is arranged on the conveyance path of the recording paper pulled out from the roll paper so that the recording paper is bent and passes in a direction opposite to the winding direction in the roll paper. After removing the curl of the recording paper by the take-up mechanism, the recording paper was conveyed to the printing section. This curl removing mechanism was fixedly provided at a fixed position.

[0003]

However, in such a configuration, as the remaining amount of the roll paper becomes smaller, the angle at which the recording paper pulled out from the roll paper enters the curl removing mechanism changes and passes through the curl removing mechanism. At that time, the bending of the recording paper becomes small, and the function of the curl removing mechanism deteriorates.
The recording paper is conveyed to the printing unit in a state where it is curled, which causes a problem of printing failure.

The present invention has been made in view of the above problems, and provides a recording apparatus capable of satisfactorily removing the curl of roll paper even when the remaining amount of roll paper is low. The purpose is to

[0005]

In order to solve the above problems, the present invention provides a curl correcting member for arranging a recording paper, which is drawn from a roll paper and runs, to be bent in a direction opposite to the winding direction. It is configured to be held by a support member having a rotating shaft rotatably arranged at a fixed position, and the curl correcting member is moved by a rotation of the rotating shaft in a direction intersecting the conveyance direction of the recording paper. The present invention is provided with a configuration in which a driving unit that rotates the rotating shaft is provided so as to move the curl correcting member in a direction in which the curl correcting member is pressed against the recording paper.

Here, the driving means is arranged between a rotating body which rotates in association with the rotation of the conveying roller, and a torque which is arranged between the rotating body and the rotating shaft and which transmits torque to the rotating shaft. It is preferable to have a configuration including a clutch.

[0007]

According to the present invention having the above-described structure, the curl correcting member can be moved in the direction to be pressed against the recording paper by rotating the rotary shaft by the drive means, and the remaining amount of the roll paper becomes small, so that the recording paper is reduced. By moving the curl straightening member when the feeding position of the sheet changes, the curl straightening member can be bent so that it can be wound around the recording paper passing through the curl straightening member, regardless of the remaining amount of roll paper. You can remove the winding curl.

Here, the drive means is arranged between the rotating body which rotates in association with the rotation of the conveying roller, and the torque which is arranged between the rotating body and the rotating shaft and which transmits torque to the rotating shaft. With the configuration including the clutch, torque is always applied to the rotary shaft during the recording paper is being conveyed by the conveying rollers, and the curl correcting member is pressed against the recording paper with a force corresponding to the torque, and the curl correcting member is not affected by the tension of the recording paper. Even if the roll paper diameter is reduced and the recording paper feed position changes, the curl straightening member automatically moves to follow the recording paper, and is held at a position balanced with force. You can give a proper bend, so regardless of the remaining amount of roll paper,
The curl of the recording paper can be removed.

[0009]

1 is a schematic side view of main components of a recording apparatus according to an embodiment of the present invention, FIG. 2 is a schematic perspective view of the recording apparatus, and FIG. 3 is a schematic perspective view of a curl removing mechanism used in the recording apparatus. Is. Reference numeral 1 denotes a roll paper obtained by winding a recording paper in a roll shape, and a storage section (not shown) provided in the recording apparatus.
Is held rotatably. 2 is a recording paper pulled out from the roll paper 1, 3 is a conveying roller for pulling the recording paper 2 out of the roll paper 1 and conveys it to a downstream printing point, 4 is a pinch roller, 5 is a widthwise cutting of the recording paper 2. A cutter roller 6 for separating the recording paper 2, and a printer roller 6 for further conveying the recording paper 2.
Reference numeral 7 is a recording means. In the present embodiment, as the recording means 7, one having an ink cartridge 8 having an ink jet type recording head at the lower end and a moving mechanism 9 for moving the ink cartridge 8 in the width direction of the recording paper 2 is used. ing.

Reference numeral 11 denotes a curl removing mechanism arranged in the recording paper conveyance path between the roll paper 1 and the conveyance roller 3.
The curl removing mechanism 11 is arranged at a position in contact with the recording paper 2 pulled out from the roll paper 1, and curls the curl straightening member 12 for bending the recording paper 2 in a direction opposite to the winding direction in the roll paper 1, and the curl correcting member 12. It has a supporting member 13 holding a curl correcting member 12. Curl correction member 1 used here
2 is optional as long as it has a surface for bending and guiding the recording paper 2, and a cylindrical one is used in this embodiment. When the cylindrical curl correcting member 12 is used, it may be rotatable or may not be rotatable. The above-mentioned support member 13 includes a rotary shaft 14 that is rotatably held in a fixed position, and a support arm 15 that holds the curl correcting member 12 and that is rotatable with respect to the rotary shaft 14. The rotating shaft 14 is arranged at a position where the curl correcting member 12 can be moved via the support arm 15 in a direction intersecting the recording paper conveyance direction when rotated.

The curl removing mechanism 11 further comprises a driving means 17 for rotating the rotary shaft 14 so as to move the curl correcting member 12 in the direction of pressing it against the recording paper 2. In the present embodiment, this driving means 17 is used as the transport roller 3
Between the rotating body 19 and the rotating shaft 14, and a rotating body 19 formed of a gear drivingly connected to a gear 18 provided on the shaft of the conveying roller 3 via a gear train so as to rotate in association with the rotation of the rotating roller 14. In addition, it has a torque clutch 20 arranged to transmit torque. Here, as the torque clutch 20, a spring clutch capable of transmitting a substantially constant torque is used. The rotating direction of the rotating body 19 is the direction indicated by the arrow A in FIG.
The torque transmission boss 21 is set to rotate so as to move the recording paper 2 against the recording paper 2.

The operation of the recording apparatus having the above structure will be described below. Roll paper 1 set in the storage section
The recording paper 2 is pulled out by the conveying roller 3 and is sent to a printing point on the downstream side, a predetermined recording is performed by the recording means 7, and it is cut by the cutter 5 and discharged. At this time, the recording paper 2 pulled out by the transport roller 3 is not curled straightly.
Through so as to be bent in a direction opposite to the winding direction in the roll paper 1, whereby the curl is removed. Here, while the transport roller 3 is rotating, a constant torque in the direction of arrow A is constantly applied to the rotary shaft 14 holding the curl correcting member 12 by the driving means 17, and thus the curl correcting member 12 is The recording paper 2 is pressed against the recording paper 2 with a constant force and is held at a position in which the reaction force due to the tension of the recording paper 2 is balanced, and the recording paper 2 is largely bent by the curl correcting member 12. When the feeding of the recording paper 2 proceeds in this state and the diameter of the roll paper 1 becomes smaller, the feeding position of the recording paper 2 from the roll paper 1 changes to the position shown by the chain double-dashed line in FIG. However, since the curl straightening member 12 is pressed against the recording paper 2 with a constant force as described above, when the feeding position of the recording paper 2 changes, the curl straightening member 12 also moves accordingly, and recording is always performed. The paper 2 moves to a position that balances with the reaction force due to the tension of the paper 2. Thus, the recording paper 2 always passes through the curl correcting member 12 in a state in which an appropriate bend is formed, and curl removal is performed. Even if the remaining amount of the roll paper 1 becomes small, the curl removal can be performed well. It can be carried out. Therefore, the recording paper 2 sent to the printing point has almost no curl,
Therefore, the distance between the recording paper 2 and the recording head can be kept constant, and good recording can be performed.

In the above embodiment, the driving means 17 applies a constant torque to the rotary shaft 14 holding the curl correcting member 12, and the curl correcting member 12 changes the feeding position of the recording paper 2. However, the present invention is not limited to this configuration, and the driving means 1
Alternatively, the curl straightening member 12 may be forcibly moved. For example, a motor or the like is drivingly connected to the rotary shaft 14 so that the rotary shaft 14 can be rotated little by little, and the rotary shaft 14 is gradually moved in the direction of arrow A in FIG. The curl straightening member 12 is rotated to move in a direction in which the curl straightening member 12 is pressed against the recording paper 2.
It may be configured such that the necessary bending is always provided to the. However,
As in the illustrated embodiment, when the drive means 17 configured to apply torque to the rotating shaft 14 is used, the curl correcting member 1
Since 2 automatically moves in accordance with the change in the traveling position of the recording paper 2, no control is required, and the advantage that the device configuration can be simplified can be obtained.

[0014]

As is apparent from the above description, according to the present invention, the curl straightening member for arranging the recording paper, which is drawn from the roll paper and runs, to be bent in the direction opposite to the winding direction, is provided. The curl correction member is held by a support member having a rotating shaft rotatably disposed in the first direction, and the curl correction member is moved in a direction intersecting the conveyance direction of the recording sheet by the rotation of the torque transmission boss. By providing the drive means for rotating the rotary shaft so as to move the straightening member in the direction of pressing the recording paper, the drive means rotates the rotary shaft so that the curl straightening member is moved to the recording paper. Can be moved in the direction of pressing
By moving the curl straightening member when the amount of remaining roll paper is low and the feeding position of the recording paper has changed, it is possible to give the curl necessary to curl the recording paper passing through the curl straightening member. The effect that the curling of the recording paper can be removed regardless of the remaining amount of the roll paper, and therefore, good image recording can be performed by keeping the distance between the recording paper and the recording head constant at the downstream printing point. have.

Here, the drive means rotates the support arm with a rotating member that rotates in association with the rotation of the conveying roller and a torque clutch that has a torque transmission boss that can be rotated by the rotating member with a torque in a sliding direction. When the moving roller is configured to move, torque is constantly applied to the torque transmission boss during the recording paper is being conveyed by the conveyance rollers, and the curl correcting member is pressed against the recording paper with a force corresponding to the torque, and a reaction force due to the tension of the recording paper is generated. Even if the roll paper diameter decreases and the recording paper feeding position changes, the curl straightening member automatically moves following the recording paper, and is held at a balanced position. It has an effect that it can be bent, a control device is not required for controlling the position of the curl correcting member, and the cost of the device can be reduced accordingly.

[Brief description of drawings]

FIG. 1 is a schematic side view of main components of a recording apparatus according to an embodiment of the present invention.

FIG. 2 is a schematic perspective view of the recording apparatus shown in FIG.

3 is a schematic perspective view of a curl removing mechanism used in the recording apparatus shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 roll paper 2 recording paper 3 conveying roller 5 cutter 6 printer roller 7 recording means 11 curl removing mechanism 12 curl straightening member 13 support member 14 rotating shaft 15 support arm 17 drive means 19 rotating body 20 torque clutch

Claims (2)

[Claims] 1. A storage unit for storing a roll paper obtained by winding a recording paper in a roll shape, a transport roller for pulling out the recording paper from the roll paper set in the storage unit and transporting it to a printing point, and the storage unit. It is provided with a curl removing mechanism provided between the roller and the conveying roller, and the curl removing mechanism is arranged at a position in contact with the recording paper pulled out from the roll paper. What is the winding direction of the recording paper in the roll paper? A curl correcting member that bends in the opposite direction and a rotating shaft that is rotatably held at a fixed position are provided, and the curl correcting member is moved in a direction intersecting the conveyance direction of the recording paper by the rotation of the rotating shaft. A recording apparatus, comprising: a supporting member held so as to hold the curl correcting member; and a driving unit that rotates the rotating shaft so as to move the curl correcting member in a direction in which the curl correcting member is pressed against the recording sheet. 2. A drive means for rotating the rotary shaft is arranged between the rotary body that rotates in conjunction with the rotation of the transport roller, and the rotary body and the rotary shaft, and the rotary shaft has a torque. The recording apparatus according to claim 1, further comprising a torque clutch that transmits the torque.