JPH05749A - Decal device - Google Patents

Abstract

PURPOSE:To facilitate the shift of a contact member with the simple structure by installing the contact member of a decal device through a one-way spring clutch on a transport driving roller such as platen roller. CONSTITUTION:A platen roller 1 transports a roll-shaped recording paper 5, in pressed state to a thermal head as printing part. A decal bracket 3 constitutes a pressing member, and pushes up the roll shaped recording paper 5 in the direction of arrow B by a top edge part A, and a decal cover 4 as recording paper pressing member presses the roll shaped recording paper 5 in pushed-up state at an intrusion port C and an exit port D. Between the instrusion port C and the exit port D, the reverse curl is formed on the roll-shaped recording paper 5 by the top edge part A of the decal bracket 3, and the curl is corrected. Further, a normal revolution hook 6 and a reverse revolution hook 7 are installed on the decal bracket 3, and a rotary driving power is obtained from an SP clutch 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for correcting the curl of a roll-shaped recording paper used in a recording device such as a facsimile or a printer, and more particularly, to a correction force corresponding to the remaining amount of the roll-shaped recording paper. The present invention relates to a decurling device suitable for adjusting and correcting curls efficiently.

[0002]

2. Description of the Related Art At present, some recording apparatuses such as facsimiles and printers use recording paper wound in a roll. The roll-shaped recording paper printed by the recording device and carried out is cut out by an automatic cutter or manually, but it is curled due to curling, that is, it becomes difficult to handle. In the conventional technique for correcting the curl of the roll-shaped recording paper, a decurling device is provided inside the recording device, and a roller or roller provided in the decurling device is used to reverse the curl direction of the roll-shaped recording paper. There is a curl that is forcibly applied in the direction. Generally, the roll-shaped recording paper, in the part wound on the center side of the roll,
The winding diameter is small, and it has a strong curl compared to the part wound outside. Therefore, when the remaining amount of the roll-shaped recording paper decreases, the curl becomes stronger. But,
The decurling device described above has a constant curling force in the opposite direction for straightening,
The curl could not be corrected properly. Further, in the standby state of the recording apparatus, the correction force by the decurling apparatus is unnecessary, and it is rather unfavorable for the recording sheet to be conveyed by giving the recording sheet an extra habit. Therefore, in the standby state of the recording apparatus, it is necessary to return a contact member, such as a roller or a roller of the decurling device, that abuts the roll-shaped recording paper to give a correction force to a position where the recording paper does not have a habit. However, if a solenoid or the like is used to return the contact member, extra space and cost are required.

As a conventional technique relating to a decal device which is a countermeasure for these problems, for example, there is one described in Japanese Patent Laid-Open No. 147549/1990. This technique moves the position of the abutting member by the interaction between the tension acting on the roll-shaped recording paper due to the weight of the roll-shaped recording paper and the transmitted power from the friction joint member such as a slip clutch, and corrects the correction force. Is to correct the curl strength with the change of the roll diameter due to the use of the roll-shaped recording paper, and to correct it with an appropriate force. Further, in this technique, at the end of the recording operation, the drive of the motor at the time of returning the recording paper by the reverse rotation of the platen roller or the like is utilized via the above-mentioned slip clutch, so that the rollers or rollers of the decal device are brought into contact with each other. The parts are returned. As a result, space and cost are reduced.

However, in this decal device, the effect when the diameter of the roll-shaped recording paper becomes small is not sufficient, and in order to control the movement of the abutting members such as rollers and rollers, a slip having a complicated structure is required. A clutch and gears for transmitting the power from the drive means to the slip clutch are used, and the mechanism is complicated. Therefore, there is a drawback that the space occupied by the decal device in the recording apparatus main body becomes large and the recording apparatus itself cannot be sufficiently miniaturized.

[0005]

The problems to be solved are that the conventional decurling device does not have a sufficient curl straightening effect when the diameter of the roll-shaped recording paper becomes small, and the structure is complicated and sufficient. The point is that it is not downsized. An object of the present invention is to solve the problems of these conventional techniques, to enable the movement of the contact member with a simple structure, and to provide a decurling device capable of exerting a sufficient curl correcting effect over the entire roll-shaped recording paper. Is to provide.

[0006]

To achieve the above object, the decal device of the present invention comprises: (1) a printing unit for printing on a roll-shaped recording paper, and a roll-shaped recording paper while pressing the roll-shaped recording paper against the printing unit. A recording device having a conveying drive roller for conveying, the conveying force of the conveying drive roller and the tension of the roll-shaped recording paper generated by the weight of the roll-shaped recording paper, and the pushing-up force transmitted through the friction joint member. In the decurling device that corrects the curl of the roll-shaped recording paper by the force corresponding to the change of the roll diameter by utilizing the interaction with the, it is attached to the shaft of the transport drive roller via the one-way spring clutch, With the forward rotation of the transport drive roller during the printing operation, the one-way spring clutch rotates and moves due to the sliding friction between the shaft of the transport drive roller and the roll recording paper is touched. However, due to the interaction between the tension applied to the roll-shaped recording paper and the rotational movement force transmitted through the one-way spring clutch, the contact member that pushes up the roll-shaped recording paper and the roll-shaped recording that is pushed up by this contact member. A recording paper pressing member that suppresses pushing up of the roll-shaped recording paper by the contact member is provided at the upstream portion and the downstream portion of the paper. (2) In the decurling device described in (1) above, as the tension of the roll-shaped recording paper is reduced and the tension is reduced, the pressing position of the recording-paper restraining member on the upstream side of the roll-shaped recording paper is lowered to reduce the tension. It is characterized in that a curl correction assisting member that strengthens the curl correction force by the contact member and the recording paper pressing member is provided. (3) In the decurling device as described in (1) or (2) above, the one-way spring clutch slides on the shaft of the transport drive roller due to the forward rotation of the transport drive roller during the printing operation of the recording apparatus. The forward rotation hook member that transmits the rotational force due to friction to the contact member comes into contact with the rotational force due to the tightening of the shaft of the transport drive roller of the one-way spring clutch accompanying the reverse rotation of the transport drive roller at the end of the printing operation of the recording device. The reverse rotation hook member that transmits to the member is provided with a gap that delays the transmission of the rotational force of the one-way spring clutch to the contact member at the end of the printing operation of the recording device and reduces the returning distance of the contact member. It is characterized by that.

[0007]

In the present invention, the abutting member of the decurling device is attached to the transport driving roller such as the platen roller via the one-way spring clutch, and the power for moving the transport driving roller is the rotational force of the transport driving roller. And, the sliding friction of the one-way spring clutch is used.
As a result, the structure of the decal device can be simplified.
Further, when the roll-shaped recording paper remains less and the tension is reduced, the curl correction assisting member lowers the restraining position on the upstream side of the roll-shaped recording paper and strengthens the curl correcting force by the contact member. As a result, even if the roll diameter of the roll-shaped recording paper becomes extremely small, the curl can be sufficiently corrected. Further, the distance that the contact member returns when the printing operation of the recording device is completed may be smaller than the reverse rotation amount of the transport drive roller, and the space for moving the contact member can be reduced.

[0008]

FIG. 1 is a perspective view showing a first embodiment of the configuration of the decurling device according to the present invention according to the present invention. The decal device of the first embodiment includes a one-way spring clutch (hereinafter,
2), a decal bracket 3 rotatable by a torque generated between the SP clutch 2 and the shaft of the platen roller 1, and between the decurling bracket 3 and the roll-shaped recording paper 5. The decal cover 4 is arranged. The platen roller 1 is a conveyance drive roller that conveys the roll-shaped recording paper 5, and conveys the roll-shaped recording paper 5 while pressing it against a thermal head, which is a printing unit (not shown), for example. Further, the decal bracket 3 constitutes the pressure contact member of the present invention, and pushes up the roll-shaped recording paper 5 in the direction of arrow B at the front end portion A. The decal cover 4 constitutes the recording paper restraining member of the present invention, and restrains the roll-shaped recording paper 5 pushed up by the decal bracket 3 at the entrance C and the carry-out exit D. Between the entrance C and the carry-out port D, the roll-shaped recording paper 5 is reversely curled (hereinafter referred to as decal) by the tip portion A of the decurling bracket 3, and the curl is corrected. Further, the decal bracket 3 is provided with a forward rotation hook 6 and a reverse rotation hook 7 to obtain rotational power from the SP clutch 2. With such a configuration, the decurling device of the first embodiment effectively corrects the curl of the rolled recording paper 5. The operation will be described below with reference to FIG.

FIG. 2 is a side view showing an embodiment of the curl correction state according to the present invention of the decurling device in FIG. The curl of the roll-shaped recording paper 5 is corrected by the decurling device shown in FIG. 1 and the thermal head 8 for printing on the roll-shaped recording paper 5 conveyed by the platen roller 1, by performing the operation described below. To do. The platen roller 1 to which the decal bracket 3 is attached via the SP clutch 2 rotates in the forward direction (arrow E) by a drive mechanism (not shown), and conveys the roll-shaped recording paper 5 in the arrow F direction. At this time, the roll-shaped recording paper 5 is printed by the thermal head 8. The SP clutch 2 is released when the platen roller 1 rotates in the forward direction (direction of arrow E), but the inner diameter of the SP clutch 2 is slightly smaller than the shaft diameter of the platen roller 1, so there is friction, and the SP clutch 2 is completely released. Instead, the SP clutch 2 rotates together with the platen roller 1 until a certain load is applied to the SP clutch 2. In this way, when the platen roller 1 rotates forward in the arrow E direction due to the friction generated between the platen roller 1 and the SP clutch 2, the SP clutch 2 also rotates in the same direction. The tip of the rotating SP clutch 2 hits the protrusion of the decal bracket 3, that is, the forward rotation hook 6,
The decal bracket 3 is moved in the direction of arrow G (forward rotation). The front end portion A of the decal bracket 3 rotated in the forward direction contacts the roll-shaped recording paper 5, and is further pushed up by the force of H. And this decal bracket 3
The roll-shaped recording paper 5 is decurled by the leading end portion A, the entrance C and the exit D of the decurling cover 4, and the curl of the roll-shaped recording paper 5 is corrected.

In this embodiment, the roll-shaped recording paper 5 has a tension T generated by its own weight and the conveying force of the platen roller 1, and the decal bracket 3
Has moved to a position where the rotational force due to the friction of the SP clutch 2 and the tension T can be balanced. The balanced conditional expression at this time is H = 2T cos θ. If H is constant, θ increases as T increases. The smaller θ is, the more the rolled recording paper 5 is pushed up, and the larger the decal amount is. The value of T is T when the weight of the roll-shaped recording paper 5 is maximum (max).
max, the minimum weight of the roll-shaped recording paper 5 (min)
At that time, it becomes Tmin. The decal amount becomes maximum when the position of the decal bracket 3 reaches the top, and becomes θmin at this time. Also, the decal bracket 3
At the bottom (to the last, the state in which the roll-shaped recording paper 5 is pressed) is θmax. The balance of each force at this time is as follows. Tmax × cos θmin = Tmin × cos θmax = H (1) The shape of the portion of the decal cover 4 contacting the recording paper so that the formula (1) is satisfied and the decal amount reaches a certain target amount. By setting, decal can be effectively performed. In this way, the decal device of the present embodiment adjusts the decal between the decal cover 4 and the decal bracket 3 in accordance with the diameter of the roll-shaped recording paper 5 to efficiently correct the curl. can do.

Next, the operation of the decurling device at the end of the recording operation of the recording device will be described with reference to FIG. FIG. 3 is a side view showing a state at the end of the curl correction operation of the decurling device in FIG. A configuration in which a curl is corrected by the decurling device provided on the platen roller 1 shown in FIGS. 1 and 2 and an automatic cutter 9 for cutting the rolled recording paper 5 printed by the thermal head 8 is newly provided. Has become. 3 (a) and 3 (c) show the state of the decurling device during the curl straightening operation, and FIG.
(B) shows a state at the end of the curl correction operation of the decurling device. Generally, a recording apparatus using a roll-shaped recording paper is provided with a cutter for cutting the recording paper such as the automatic cutter 9 shown in FIG. 3A or the manual cutter 10 shown in FIG. Hereinafter, FIG.
The curl correction operation will be described with reference to (b). There is a distance L from the cutting position M to the printing position N of the roll-shaped recording paper 5, and after the printing is completed, the final printing portion of the roll-shaped recording paper 5 is conveyed until it exceeds the cutting position M. And
In order to prepare for the next printing, the cut leading end portion of the roll-shaped recording paper 5 is pulled back from the cutting position M to the printing position N, and the printer waits in the state shown in FIG. 3 (b). When the platen roller 1 is pulled back from the cutting position M to the printing position N, the platen roller 1 rotates in the opposite direction. When the platen roller 1 rotates in the reverse direction, the SP clutch 2 moves in the tightening direction and rotates in reverse with the platen roller 1. At this time, if the SP clutch 2 and the decal bracket 3 are fixed by the forward rotation hook 6, the amount of rotation of the decurling bracket 3 is the same as the amount of rotation of the platen roller 1 and the SP clutch 2. , And becomes larger than the position shown in FIG. In such a case, the space required to move the decal bracket 3 becomes large. In order to solve this problem, the decurling bracket 3 of this embodiment is provided with a reverse rotation hook 7 for transmitting power during reverse rotation, separately from the forward rotation hook 6 and from the forward rotation hook 6. They are provided at positions separated by the gap K. The value of this gap K is obtained by the method described below. In order to return the rolled recording paper 5 from the cutting position M of the recording paper by the automatic cutter 9 to the printing position N by the thermal head 8, the platen roller 1 needs to rotate by γ, and the decal bracket 3 , Β can be rotated only (γ> β), the required gap angle (in this case, it is represented by an angle with the center of the platen roller 1 as the center) is α> γ-β Any value that satisfies In this way, the decal device of the present embodiment reduces the space required for returning at the end of the printing operation.

FIG. 4 is a side sectional view showing an embodiment of the configuration of a facsimile provided with the decurling device in FIG. The facsimile 11 is attached to the platen roller 1 via the SP clutch 2, and the decal bracket 3 is attached.
And a decal device consisting of a decal cover 4,
In addition, it is composed of various members for performing a normal facsimile operation. That is, the facsimile 11
The recording paper holder 12 that stores the roll-shaped recording paper 5, the thermal head 8 that prints the print information received on the roll-shaped recording paper 5, and the roll-shaped recording paper 5 that has been printed are cut into sheets for the receiving operation of An automatic cutter 9, a discharge roller 13 for discharging a sheet of recording paper, and a discharge roller 14, and a guide plate 15 on which a document 31 is set for the transmission operation of the facsimile 11; Separation roller 16 and separation rubber 17 that separates one sheet 31 from the original sheet 31 and carries it in;
Pressure roller 1 that conveys and discharges at a constant speed
8, pressure roller 19, paper ejection roller 20, paper ejection roller 2
1. A scanner base 30 that reads image information from a document 31 that is conveyed at a constant speed, a light source 22 that illuminates the scanner base 30, and a first image-reflecting image of the document 31 that is illuminated. The mirror 23, the second mirror 24, the third mirror 25, and the reflected original 31
CCD which receives the image of
ge Coupled Device, charge coupled device)
And a controller 27 for controlling the overall operation of the facsimile 11, and an operation unit 2 for inputting instructions from the operator and displaying the operating state of the facsimile 11.
8 and an exterior cover 29 that forms the exterior of the facsimile 11. With such a configuration, the facsimile 11 transmits the original 31 and prints the received print information on the roll-shaped recording paper 5. During the printing operation, the curl of the roll-shaped recording paper 5 is corrected by the decurling device of the present invention. Then, the sheet-shaped recording paper cut and discharged by the automatic cutter 9 has curl corrected and is easy to handle. The decal device of this embodiment applies the driving force necessary for moving the position to the platen roller 1
The facsimile 11 can be downsized because it has a very compact structure.

As described above, in the decurling device shown in FIGS. 1 to 4, the portion (tip portion A) of the decal bracket 3 which is the pressure contact member of the present invention for pushing up the roll recording paper 5 and the recording of the present invention. A portion of the decal cover 4 serving as a paper pressing member that holds the roll-shaped recording paper 5 (entrance C
And the carry-out port D) are the parts obtained by bending and deforming the respective members. As a result, the cost can be reduced. However, since the roll-shaped recording paper 5 is conveyed while coming into contact with these portions, there is a risk of damaging the printing surface of the roll-shaped recording paper 5 in particular. Regarding the decal device that dealt with such a problem,
This will be described below.

FIG. 5 is a side sectional view showing a second embodiment of the constitution relating to the present invention of the decurling device embodying the present invention. The decurling device of the second embodiment includes a platen roller 1 that conveys the roll-shaped recording paper 5 while pressing it against the thermal header 8, and two SP clutches (not shown) attached to the platen roller 1 or an SP clutch. Decal bracket 3 that rotates with the rotation of the platen roller 1 by a needle clutch combination mechanism or the like.
2, and a movable roller 34 and a fixed roller 35 that hold the roll-shaped recording paper 5 pressed by the decal bracket 32 on the platen roller 1 side and the holder 33 side that stores the roll-shaped recording paper 5, respectively. ing. The decal bracket 32 constitutes the pressure contact member of the present invention, and the movable roller 34 and the fixed roller 35.
Constitutes the recording paper restraining member of the present invention. The decal bracket 32 has a swing roller 36, and the roll roller 36 pushes up the roll-shaped recording paper 5. The decal bracket 32 transmits the rotational power from the platen roller 1 by using two SP clutches in different winding directions or a combination mechanism of an SP clutch and a needle clutch. This makes it possible to stop the rotary motion with a constant load in both the forward rotation direction and the reverse rotation direction. That is, in the case of the forward rotation direction, the roll-shaped recording paper 5
It will stop in balance with the tension of, and in the case of the reverse rotation direction, it will stop by hitting a part of the stopper or other parts. The decurling device of the second embodiment having such a configuration corrects the curl of the roll-shaped recording paper 5 by the swing roller 36, the movable roller 34, and the fixed roller 35 in the figure by the operation described below. To do. The swing roller 36 is rotatably attached to the decal bracket 32. The decal bracket 32 is rotatably attached to the shaft of the platen roller 1.
Moreover, an SP clutch (not shown) is inserted on the shaft of the platen roller 1, and when the platen roller 1 is rotated by driving a motor (not shown), the decal bracket 32 is pushed up with a constant force. That is, although the initial positions of the decal bracket 32 and the swing roller 36 are at the positions indicated by the broken lines, they are pushed up by the clockwise rotation (forward rotation) of the platen roller 1 and are indicated by the solid line in the figure. Reach the position shown. In the figure, at the position indicated by the solid line, the frictional force (tension) T between the roll-shaped recording paper 5 and the holder 33 and the pushing-up force H by the SP clutch balance. The balanced position changes while the pushing force H is constant, but the frictional force T changes depending on the weight of the roll-shaped recording paper 5. That is, the roll-shaped recording paper 5
Is large and heavy, the decal bracket 32 is balanced at a low position, and the roll recording paper 5 is small and light, the decal bracket 32 is balanced at a high position. Due to the change in the balanced position, the roll-shaped recording paper 5
The curl removing effect also varies. That is, when the roll diameter of the roll-shaped recording paper 5 is large, the effect is small, and when the roll diameter is small, the effect is large. Here, since the curl amount of the roll-shaped recording paper 5 is small when the roll diameter is large and is large when the roll diameter is small, the change in the effect due to the change in the balanced position works in accordance with the roll amount. In this way, in the decurling device of the second embodiment, with a simple structure, the decurling bracket 32 is moved, the correction force is changed according to the remaining amount of the roll-shaped recording paper 5, and an appropriate curl is obtained. Can be corrected. Further, by using a roller in a portion that comes into contact with the roll-shaped recording paper 5, damage to the roll-shaped recording paper 5 can be avoided.

However, the diameter of the roll is, for example, 35 mm.
When the following occurs, the curl amount of the roll-shaped recording paper 5 is too large, and the mechanism of the decurling device shown in FIG.
Curls may not be fully corrected. In order to deal with such a problem, as shown in FIG. 6 below, a curl correction assisting member that moves the movable roller 34 according to the change in the remaining amount of the roll-shaped recording paper is provided. Figure 6
FIG. 3 is a perspective view showing the details of an embodiment of the constitution relating to the present invention of the curl straightening assisting member of the present invention. The curl straightening assisting member of the present invention includes a movable roller 34 that holds the rolled recording paper pushed up by the holder side, support plates (front) 37 and 38 that support the movable roller 34, and a support plate (rear) 39.
40 and a spring 41.
Support plates (front) 37, 38 and support plates (rear) 39,
Each of the 40 has a bend, and a spring 41 is applied to the bend. Support plate (front) 3
7 and the support plate (front) 38, and the support plate (rear) 39 and the support plate (rear) 40 are respectively stopped by a stop shaft 42, and the support plate (front) 37 is against the support plate (front) 38. Further, the support plate (rear) 39 is swingable with respect to the support plate (rear) 40. However, the support plate (front) 38 and the support plate (rear) 40 are provided with bent portions 43 and 44, respectively, and the rocking of the support plate (front) 37 and the support plate (rear) 39 is It will be the upper limit. The support plate (front) 38 and the support plate (rear) 40 are
A stop shaft 47 is swingably attached to a support base (not shown) or the like. Further, the support plate (front) 38 and the support plate (rear) 40 are provided with bent portions 45 and 46, and the swing roller 36 of the decal bracket 32 shown in FIG. Contact and support plate (front) 3
8 and the support plate (rear) 40 are pushed up by the correction force H of the swing roller 36. By the pushing up of the swing roller 36 and the pulling force of the spring 41, the support plate (front) 37, the support plate (rear) 39, and the movable roller 34 are moved by the arrow P.
Descend in the direction. Hereinafter, movements of the support plates (front) 37, 38 and the movable roller 34 by pushing up the swing roller 36 of FIG. 5 will be described with reference to FIG. 7.

FIG. 7 is a side view showing an embodiment of the operation state of the curl correction assisting member in FIG. 6 according to the present invention. In FIG. 7A, the bent portion 4 of the support plate (front) 38
When a force (H) from the swinging roller 36 of FIG. 5 is applied to the support shaft 5, the support plate (front) 37 and the support plate (front) 38 move to the support shaft 4
Bending around 2 is in the state shown in FIG. As a result, the angle formed by the movable roller 34 and the swing roller 36 in FIG. 5, that is, the angle at which the roll-shaped recording paper is bent becomes an acute angle. Therefore, even if the curl amount of the rolled recording paper is large, the curl can be sufficiently corrected. Incidentally, as shown in FIG. 7C, a pin 48 may be provided instead of the bent portion 43. Further, the spring 41 is not always necessary, and in that case, the support plate (front) 37
Also, a bent portion for hanging the spring 41 such as the support plate (front) 38 is not necessary, and the shape of the curl straightening assisting member of the present invention is not limited to those shown in FIGS. 6 and 7. In addition, by constituting the movable roller 34 by itself and applying downward force with a spring or the like, the remaining amount of the roll-shaped recording paper decreases, and the tension of the roll-shaped recording paper is reduced. It is also possible to make the angle for decurl formed by the movable roller 34 and the oscillating roller 36 in FIG.

As described above with reference to FIGS. 1 to 7, the decurling device of this embodiment includes a platen roller,
Since the driving force for moving the pressure contact member is obtained, the structure can be made very simple, and the recording device such as a facsimile or a printer can be downsized. Further, the angle at which the roll-shaped recording paper enters the decurling device can be changed in response to the change in tension due to the change in the self-weight of the roll-shaped recording paper. As a result, even if the roll diameter of the roll-shaped recording paper becomes extremely small and the curl amount becomes large, it can be sufficiently corrected. Incidentally, in the first and second embodiments,
Although the structure is simplified by attaching the decurling device to the platen roller 1, the present invention is not limited to the platen roller 1 as long as it is a conveyance driving roller having a similar function. Further, although the description has been made by using the recording device including the printing unit using the thermal head, the present invention can be applied to, for example, a recording device including an inkjet printer as the printing unit.

[0018]

According to the present invention, the moving mechanism of the abutting member is simplified, the size can be reduced, and the curl of the roll-shaped recording paper having an extremely small roll diameter can be sufficiently corrected. Therefore, it is possible to reduce the size of the recording apparatus using the decal device and improve the performance.

[0019]

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of a configuration relating to the present invention of a decurling device implementing the present invention.

FIG. 2 is a side view showing an embodiment of a curl correction state according to the present invention of the decurling device in FIG.

FIG. 3 is a side view showing a state at the end of the curl correcting operation of the decurling device in FIG.

FIG. 4 is a side sectional view showing an embodiment of the configuration of a facsimile provided with the decal device in FIG.

FIG. 5 is a side sectional view showing a second embodiment of the configuration of the decurling device according to the present invention according to the present invention.

FIG. 6 is a perspective view showing the details of one embodiment of the constitution relating to the present invention of the curl correction assisting member of the present invention.

7 is a side view showing an example of an operating state of the curl correction assisting member in FIG. 6 according to the present invention.

[Explanation of symbols]

1 Platen roller 2 SP clutch Bracket for 3 decals 4 Decal cover 5 roll recording paper 6 forward rotation hook 7 Reverse rotation hook 8 thermal head 9 Automatic cutter 10 Manual cutter 11 Facsimile 12 Recording paper holder 13 Discharge roller 14 discharge roller 15 Guide plate 16 Separation roller 17 Separation rubber 18 Pressure roller 19 pressure roller 20 Paper ejection roller 21 Paper ejection roller 22 Light source 23 First mirror 24 Second mirror 25 Third mirror 26 CCD 27 Controller 28 Operation part 29 Exterior cover 30 scanner base 31 manuscript 32 Decal bracket 33 holder 34 Movable roller 35 Fixed roller 36 Swing roller 37, 38 Support plate to support (front) 39, 40 Support plate (rear) 41 spring 42 Stop shaft 43-46 Bend 47 stop shaft 48 pins

Claims (3)

[Claims] 1. A recording apparatus having a printing means for printing on a roll-shaped recording paper and a transport drive roller for transporting the roll-shaped recording paper, wherein the transport force by the transport-driving roller and the roll-shaped recording paper are provided. By utilizing the interaction between the tension of the roll-shaped recording paper generated by the weight of and the pushing-up force transmitted through the friction joint means, the curl of the roll-shaped recording paper is adapted to the change of the roll diameter. In a decurling device that corrects with force, it is attached to the shaft of the transport drive roller via a one-way spring clutch, and the one-way spring clutch and the transport drive are accompanied by the forward rotation of the transport drive roller during the printing operation of the recording device. It is rotated by sliding friction with the shaft of the roller and comes into contact with the roll-shaped recording paper, and the tension applied to the roll-shaped recording paper and the one-way By the interaction with the rotational movement force transmitted through the spring clutch, the contact means for pushing up the roll recording paper, and the upstream portion and the downstream portion of the roll recording paper pushed up by the contact means, A decal device, comprising: a recording paper restraining means for restraining pushing up of the rolled recording paper by the abutting means. 2. The decurling device according to claim 1, wherein the holding position of the recording paper pressing means on the upstream side of the rolled recording paper is lowered in accordance with a change in tension due to the weight of the rolled recording paper. A decurling device provided with a curl correction assisting means for enhancing the curl correcting force by the contact means and the recording paper pressing means. 3. The decurling device according to claim 1, wherein the shaft of the transport drive roller of the one-way spring clutch accompanies the forward rotation of the transport drive roller during a printing operation of the recording device. Forward rotation hook means for transmitting the rotational force due to sliding friction with the contact means to the contact means, and the shaft of the transport drive roller of the one-way spring clutch accompanying the reverse rotation of the transport drive roller at the end of the printing operation of the recording apparatus. Reverse rotation hook means for transmitting the rotational force due to the tightening of the contact means to the contact means, and delaying the transmission of the rotational force of the one-way spring clutch to the contact means at the end of the printing operation of the recording device, A decal device characterized in that it is provided with a gap to reduce the return distance.