JP3145464B2 - Decal equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decurling apparatus, for example, a decurling apparatus for removing curling of a recording sheet of a recording apparatus using a roll of recording paper.

[0002]

2. Description of the Related Art As a conventional decurling device, for example,
FIG. 9A described in Japanese Utility Model Laid- Open No. 2-40551,
There is the one shown in FIG. The decurling apparatus 1 shown in FIG. 9 (a) is provided with a decurling shaft (stiffening shaft) 5 which moves up and down on a traveling path of the recording paper 4 for pulling out the recording paper 4 from the storage container 3 accommodating the recording paper roll 2. is there.

As a conventional decurling device, there is a decurling device 6 as shown in FIG. 9C described in Japanese Patent Application Laid- Open No. 2-147549. The same components as those of the decurling device shown in FIG . The decurling device 6 supports the guide shaft 7 which rotates according to the diameter of the recording paper roll 2 and the guide shaft 7.
A and a gear motor connected via a clutch provided at the end of the shaft 8A. The tension applied to the recording paper 4 and the power from the motor cause the recording paper 4 to rotate.
Changes the winding angle θ formed with respect to the decal shaft 5 of
The recording paper 4 is configured to have a decurling effect of removing curling.

As a conventional decurling apparatus, there is one shown in FIG. 10 described in Japanese Patent Publication No. 1-57019. The same components as those of the decurling device shown in FIG . The decurling device 9 shown in FIG. 10 always presses the decurling shaft 5 against the recording paper 4 pulled out from the recording paper roll 2.

[0005]

However, in such a prior art, when the roll diameter of the recording paper roll 2 of the decurling device 1 shown in FIG. However, when the diameter of the recording paper roll 2 is reduced, the decurling effect is reduced, and a sufficient decurling effect cannot be obtained due to the size of the recording paper roll 2. is there.

The decurling device 6 shown in FIG. 9 (c) is for solving such a drawback, but when the roll diameter is small, the back tension becomes extremely small, so that a good decurling effect is obtained. I can't get it. Further, there is a problem that a mechanism for producing the decal effect is complicated and expensive. Further, in the decurling device 9 shown in FIG. 10 , since the decurling shaft 5 always presses the recording paper 4, the decurling shaft 5 keeps pressing the recording paper 4 even when the recording device does not operate and is in a standby state. Therefore, the recording paper 4 has a so-called waiting habit that follows the path of the paper passing, and the curving of the recording paper roll 2 and the curl of the recording paper 4 is corrected, and the waiting habit remains. There is a problem that the so-called standby curl which is troublesome on the paper 4 occurs.

[0007] The present invention, such a prior art has been made in the background, by providing a biasing member and the roller on the container of the serial Rokushi roll, suitably inexpensively adjusting the drawer load of the recording paper Also, by providing the decurling unit, the decurling member is moved to the non-operation position when the decurling operation is stopped. Further, by providing a guide member for guiding the decurling member, the ironing angle can be kept constant even when the tension of the recording paper changes, and further, a driving force for transmitting and blocking the driving force of the conveying means. An object of the present invention is to provide a decurling device that can eliminate the need for a dedicated driving source by providing an intermittent unit.

[0008]

According to the first aspect of the present invention,
Pulled out from the holding member that holds the recording paper roll
The recording paper curled toward the inside of the paper
In a decurling apparatus having decurling means for removing curls
The decurling means is provided on a side of the holding member.
An urging member for pressing the recording paper roll in the axial direction;
At the front of the bottom of the holding member, it can be moved to and away from the bottom of the recording paper roll
A roller provided with an axis substantially parallel to the recording paper roll
Wherein the drawing load of the recording paper is changed .

According to a second aspect of the present invention, the sheet is wound into a roll.
Conveyor that pulls out curled recording paper toward the inside of the paper
The recording paper is provided on the upstream side in the drawing direction of
Having a decurling means for engaging with the recording paper and removing the curl of the recording paper.
In the decurling device, the decurling means is
The curled recording paper is brought into contact with the inner surface of the recording paper.
A turn roller for guiding the inside of the recording paper;
And between the transporting means and the outer surface of the recording paper.
It has a curved surface that contacts and flips the recording paper outside the recording paper
Near the decurling means.
Then, the decal member pulls out the recording paper and reverses it.
When the decurling operation is stopped, the decurling member is decurled.
Decal to move from the decal operation position
Releasing means for moving the decurling member to the decurling operation position
A holding portion that can be held and released from the
From the operating position to the non-operating position where the decal operation is not performed.
And a guide member for guiding . According to a third aspect of the present invention, the paper is wound in a roll shape.
Of the transport means to pull out the curled recording paper
It is provided on the upstream side in the drawing direction of the recording paper and is related to the recording paper.
A decurling unit having decurling means for removing the curl of the combined recording paper;
In the curling device, the decurling means is provided for
The recording paper in contact with the inner surface of the recording paper.
A turn roller for guiding the inside of the paper, and the turn roller
Provided between the transfer means and the outer surface of the recording paper;
With a curved surface that flips the recording paper outside the recording paper
A curling member, and a
Decal for the decal member to pull out and reverse the recording paper
When the decal operation is stopped, the decurling member is decurled.
Decal release hand to move from the decal operation position
And a driving force of the conveying means to the decurling means.
And a drive force interrupting means for transmitting and interrupting .

[0010]

[0011]

[0012]

[0013]

According to the present invention, the recording paper roll is held.
The holding member has a biasing member on the side and a roller on the front of the bottom.
The recording paper roll is always urged in the axial direction.
And roll the recording paper curl with rollers
To For this reason, the back tension
The roll is small from the time the roll diameter is large to
The recording paper roll is fixed when the roll diameter is
To move forward from the roller and move away from the roller.
The effect increases back tension.

[0014]

[0015]

[0016]

According to the second aspect of the present invention, since the decurling unit for moving the decurling member is provided near the decurling unit when the decurling operation is stopped, the decurling unit is stopped when the decurling operation of the decurling member is stopped. The decurling member is moved from the decurling operation position. Ma
In addition, since the guide member is provided, when the decurling member is held by the holding portion of the guide member, the decurling member is in a decurling operation position and performs a certain decurling operation, while the holding member is detached and guided to the non-operation position. Then, the decurling member does not perform the decurling operation.

According to the third aspect of the present invention, the decurling means
Move the decurling member when the decal operation stops near
Decal release means is provided,
When the decurling operation of the member stops, the decurling release means
The decurling member is moved from the decurling operation position. Ma
In addition, since the driving force interrupting means is provided , the driving force of the transport means is transmitted or cut off to the decurling unit via the driving force interrupting means. Therefore, by suitably controlling the driving force intermittent means, the driving force can be intermittently operated as required, and the decurling means can be operated.

[0019]

Embodiments of the present invention will be described below with reference to the drawings .

[0020]

[0021]

[0022]

[0023]

[0024]

[0025]

[0026]

[0027]

FIGS. 1 to 4 show a decal device according to the present invention .
FIG. 3 is a diagram showing one embodiment, in which the present invention is applied to a recording unit of a facsimile machine . First, the configuration will be described. Figure
In FIG. 1, reference numeral 11 denotes a decurling device,
Is provided in the recording unit 10a of the facsimile machine 10.
You. The facsimile machine 10 is usually used except for the decal machine 11.
Roll of recording paper that is the same as that of
Roll paper holder 13 that accommodates 12 and roll paper holder 13
Roller 16 and decurling device 11 for guiding recording paper 15 from
Transport roller 17 which is a transport means for pulling out and transporting through
The recording paper 15 is pressed against the upper side of the transport roller 17.
And the downstream of the thermal head 18
The cutter 19 provided on the side and the cut recording paper 15
And a discharge roller 20 for discharging. The recording paper b Lumpur
Recording paper 15 pulled out from 12 was wound in a roll shape
It has a curl, and is facing the inner surface 15a inside the paper.
The song is curled, so-called. Decal 11 roll paper holder 13 is a holding member for holding the recording paper roll 12
Between the side wall 13a of the roll paper holder 13 and the axial side 12a of the recording paper roll 12 facing the side wall 13a and the side wall 13a. a pressure plate 43 is a biasing member for pressing under a pressure F _0, the bottom 12 of the paper roll 12 on the front side of the bottom portion 13b of the roll paper holder 13
a roller 44 which is provided so as to be able to contact and separate from the recording paper roll 12 and has an axis substantially parallel to the recording paper roll 12. Roller 44 is recording paper 15
The width is smaller than the paper width of
Is rotatably supported by the bottom 13b.

The pressing plate 43 presses the side portion 12 a of the recording paper roll 12 to pull out the recording paper 15 from the roll paper holder 13 that accommodates the recording paper roll 12, and the back tension F
₁ increase, roller 44 rotates in contact with the bottom of the recording paper roll 12, acts to reduce the back tension F ₁ when the roll diameter of the recording paper roll 12 is large. Between the roll paper holder 13 and the transport roller 17, there is a roll paper holder 13
A guide roller 16 that contacts the outside of the recording paper 15 and guides the recording paper 15 toward the transport roller 17 on the downstream side in the drawing direction of the recording paper 15
In addition, a stick-shaped turn roller 45 that guides the recording paper 15 in contact with the inside thereof, and a decurling roller 24 that is a decurling unit that contacts the outside of the recording paper 15 and removes curl of the recording paper 15 are provided. The turn roller 45, the decurling roller 24, the pressure plate 43, and the roller 44 are the decurling device 11 that constitutes the decurling means 26.

Next, when the pressure plate 43 and the roller 44 of the decurling apparatus 11 according to the present invention is provided, will be described the magnitude of the change of the back tension F ₁ by the magnitude of the roll diameter of the recording paper roll 12. 3A and 3B, when the roll diameter r ₁ of the recording paper roll 12 in the roll paper holder 13 is large, the influence of the pressing force F ₀ of the pressing plate 43 on the back tension F ₁ is different from the roll diameter r 1. Small because _one is big.
When the recording paper roll 12 rotates and the recording paper 15 is pulled out, the recording paper roll 12 is rotated by a rotatable roller 44.
, The frictional load between the bottom 12a of the recording paper roll 12 and the roll paper holder 13 is smaller than when the roller 44 is not provided. Back tension F at this time
₁ a is shown by the following equation.

F ₁ a = μMr ₁ + F ₀ μ / r ₁ Here, M is the weight of the recording paper roll 12, and μ is the recording paper roll
This is the coefficient of friction between 12 and the roll paper holder 13. Also,
When the roll diameter r ₂ of the recording paper roll 12 is small, the back tension F _{1 at} this time is used for rotating the recording paper roll 12 by rotating the recording paper roll 12 by overcoming the frictional force of the pressure plate 43 with the weight of the recording paper roll 12 being small. Since a large force is required, the recording paper roll 12 gets over the roller 44. In this case, a frictional force is generated between the recording paper roll 12 and the front wall of the roll paper holder 13 corresponding to the pulling load. And
The back tension F ₁ b at this time is expressed by the following equation.

F ₁ b = μNr ₂ + F ₀ μ / r _2, where N is a small force corresponding to its own weight. Fig. 3 (c)
In addition, the roll diameter and the back tension F ₁ (F ₁ a, F _1
When the pressure plate 43 and the roller 44 of the present invention, which indicate the relationship with 1b), are provided, the back tension F ₁ is almost constant until the diameter of the roll goes from large to medium as indicated by the chain line A. However, it can be seen that when the roll diameter decreases from the middle, F ₁ acts to increase.

On the other hand, the curling amount of the recording paper 15 when the recording paper 15 is pulled out from the recording paper roll 12 without passing through the decurling device and cut to a predetermined length is as shown in FIGS. 4 (a) and 4 (b). Assuming that the curl amount when the recording paper 15 curls convexly on the outer surface side, that is, the print side is plus + H, and the curl amount when the recording paper 15 curls convexly on the inner surface side is minus -H, FIG.
It is experimentally known that the state shown in FIG.
This is because the curl of the recording paper roll 12 is constant because the torque for winding the recording paper roll 12 is constant, so that as the recording paper roll 12 gets closer to the winding, the recording paper roll 12 is strongly wound. This is because the diameter is small, and the curling becomes even stronger.

Accordingly, the recording paper 15 is moved from the recording paper roll 12 to the recording paper 15.
When pulling out by conveying rollers 17, the recording paper 15 to such changes in the curl amount the magnitude of the roll diameter of the recording paper roll 12, pressure plate 43 is a decurl apparatus 11 of the present invention, the roller 44, turn roller 45 and when passed through the decurling roller 24, when the roll diameter r ₁ of the paper roll 12 is large, the curl amount of recording paper 15 is relatively small, back tension F
_{Since 1} is relatively small, the curl can be removed even if the decurling effect of the decurling roller 24 is small. On the other hand, the curl amount when the roll diameter r ₂ of the paper roll 12 becomes small becomes large, since the back tension F ₁ by the decurl unit 11 increases, decurling effect of the decurling roller 24 is increased, it can sufficiently remove the curl . That is, FIG.
As shown in (d), it is possible to obtain a good recording paper 15 having almost no curl regardless of the roll diameter.

FIGS. 5 to 8 show a second embodiment of the decurling apparatus according to the present invention . The same components as those in the first embodiment shown in FIG. The decal device 51 shown in FIG. 5 is an example applied to a facsimile device 50.
Is located upstream of the recording paper 15 of the transport roller 17 that is stored in the roll paper holder 13 of the facsimile device 50 and pulls out the curled recording paper 15 from the rolled recording paper roll 12 toward the inside of the paper surface. And a decurling unit 52 that engages with the recording paper 15 and removes the curl of the recording paper 15. The decurling unit 52 is provided at a decurling operation position P between the turn roller 53 and the transport roller 17 and a turn roller 53 for guiding the inside of the recording paper 15.
And a decurling roller 54 which is a decurling member having a curved surface for inverting the recording paper 15 to the outside of the recording paper 15 in contact with the recording paper 15. The decal roller 54 engages with a lower part of a guide slot 58 of a guide member 57 described later by its own weight or a spring force,
It is held at the decurling operation position P. At this time, the recording paper 15 pulled out by the transport roller 17 is
The decurling roller 54 contacts the decurling roller 54 and the turn roller 53 to form a fixed decurling angle θ shown in FIG.
A decurling force F acts in the direction of the bisector of the decurling angle θ in accordance with the pulling power of the transport roller 17. The self-weight or spring force of the decal roller 54 is set to be larger than the decurling force F.

Numeral 55 denotes a decurling unit . The decurling unit 55 is located in the vicinity of the decurling unit 52 near the lower side plate of the facsimile apparatus 50 as shown in FIGS. 5, 6A and 6B.
A disk-shaped base 55a rotatably provided at 50A, and a lever 55b extending from the outer periphery of the disk base 55a to the vicinity of the decal roller 54, and when the base 55a rotates, the lever The hook-shaped tip portion 55c of the portion 55b engages with the decurling roller 54 at the decurling operation position P, and
Can be moved upward from the decurling operation position P along a guide member 57 described later. Base 55a of decal release means 55
Is operated only when the decurling roller 54 pulls out the recording paper 15 and stops the decurling operation.

In FIG . 7 , reference numeral 57 denotes a guide member. The guide member 57 protrudes downward from the upper side plate 50B of the facsimile apparatus 50 near the decurling means 52 and has a vertically long length S.
It has a guide elongated hole 58 formed in a letter shape. The lower portion 58a of the guide slot 58 is bent toward the downstream side of the recording paper 15,
A holding portion capable of holding and releasing the decurling roller 54 at the decurling operation position P is provided. The angle of refraction す between the refraction direction R of the guide slot 58 and the direction of the decurling force F applied to the decurling roller 54 is 90 ° or less.
It is 90 ° or less, for example, 85 ° within a range in which 58a can be separated.
The figure shows the case where the refraction angle ゜ is 90 °. The upper portion 58b of the guide slot 58 has a non-operation position Q where the decurling roller 54 does not perform the decurling operation, and the decurling roller 54 is
a to the upper part 58b.

As shown in FIG. 8 , a gear 17A fixed to the shaft of the conveying roller 17 and a base 55a of the decurling unit 55 are provided near the lower side plate 50A between the conveying roller 17 and the decurling unit 55. A gear train 59 for connecting the gear 55A fixed to the shaft is provided, and a clutch 60 interposed between the gear train 59 and capable of intermittently transmitting the driving force of the gear train 59 is provided. The clutch 60 includes, for example, a coil spring (not shown), a gear connected to both ends of the coil spring, a ratchet and a solenoid for controlling rotation of the gear, and connection of driving force by control means (not shown). And can be shut off. Then, when the transport roller 17 is driven and the recording paper 15 is transported, the clutch 60 is disconnected,
The lever portion 55b of the decurling unit 55 is lowered, and the decurling roller 54 is located at the decurling operation position P.
At the end of the last conveyance of the recording paper 15 for recording the last received content, the control means operates, the clutch 60 is connected, and the driving force is transmitted from the conveyance roller 17 to the decurling release means 55. The decurling unit 55 rotates so that the leading end 55c of the decurling unit 55 moves the decurling roller 54 from the decurling operation position P to the non-operation position Q.
The gear train 59, the clutch 60 and the control means are driving force intermittent means.
Make up 61.

Next, the operation will be described. In the decurling device 51 of the present invention, the decurling roller is used during the decurling operation.
54 is held at the decurling operation position P of the holding portion of the lower portion 58a of the guide elongated hole 58 of the guide member 57,
Due to the forward rotation of 17, a tensile force is applied to the recording paper 15, and even if the recording paper roll 12 causes a backlash to the recording paper roll 12 to the recording paper 15, the decurling roller 54 moves to the decurling operation position P. Held, and the decal angle θ is constant. For this reason, the recording paper 15 can always maintain a constant decurling effect.

The decurling device 51 is provided with a decurling unit 55 for moving the decurling roller 54 at the decurling operation position P, and a driving force interrupting unit 61 for interrupting the driving force of the decurling unit 55. Roller 17
Pulls out the recording paper for the final recording of the reception, and when the decurling operation is completed, the clutch 60
Is connected, and the decurling unit 55 is rotated clockwise by the driving force from the transport roller 17, and the leading end 55c of the decurling unit 55 moves the decurling roller 54 to the decurling operation position P.
The guide member 57 is guided along the guide slot 58 of the guide member 57 and moved to the non-operation position Q. For this reason, the recording paper 15 does not have a standby habit, and the first recording paper 15 after the standby can be printed on a good recording paper 15.

Further, the decurling unit 55 is provided with the conveying roller 17.
Since it is operated by the driving force from, a dedicated driving source for releasing the decurling roller 54 is not required, and control can be performed.

[0042]

As described above, according to the first aspect of the present invention , the urging member and the roller are provided in the storage container for the recording paper roll.
, So that the load of pulling out the recording paper can be reduced
And a good decurling effect can be obtained. According to the second aspect of the present invention, the decurling means is provided.
By providing this, the decurling unit can be
Move the material to the non-operating position and remove the recording paper
The first sheet after the standby can be formed into a good recording sheet without curl.
Also, a guide member for guiding the decal member is provided.
Keeps the ironing angle constant even if the tension of the recording paper changes
Can be held.

Further, according to the third aspect of the present invention, deca
The decal operation by providing
At times, move the decurling member to the non-operation position and wait for the recording paper.
Good record without curl on the first sheet after standby
Can be recorded. It also transmits and blocks the driving force of the transport means.
Dedicated drive source by providing drive interrupting means
Can be eliminated.

[0044]

[0045]

[Brief description of the drawings]

FIG. 1 shows an embodiment of a decurling apparatus according to the present invention .
1 is an overall schematic front view of a facsimile apparatus according to the present invention.

FIG. 2 is an oblique view showing the lower side of the facsimile apparatus shown in FIG . 1;
FIG.

FIG. 3 shows a back tension F of the decurling device shown in FIG .
A diagram for explaining the _first size, (a) shows the recording paper low
(B) is a recording paper roll when the roll diameter of the roll is large.
(C) is a front view when the roll diameter of the roll is small.
Tsu is a graph showing a change in click tension F _1.

FIG. 4 shows the curl amount and roll diameter of the decurling device shown in FIG .
FIG. 7A is a diagram showing a difference between the curl amount and the magnitude of the curl amount.
(B) is a front view when the curl amount is negative.
(C) is a graph without the decal device,
(D) is a graph having the decurling device of the present invention.
It is.

FIG. 5 shows an embodiment of a decurling apparatus according to the present invention .
1 is an overall schematic front view of a facsimile apparatus according to the present invention.

6 is a view showing a main part of the decurling device shown in FIG . 5,
(A) is a schematic front view of the decurling unit, (b) is
It is a schematic front view showing the operation.

FIG. 7 is a front view showing a guide member of the decurling device shown in FIG . 5;
FIG.

8 shows a driving force intermittent means of the decurling device shown in FIG .
FIG.

FIG. 9 is a view showing a conventional decurling device, wherein (a) shows
The front view of the main part when the roll diameter is large.
The front view of the main part when the diameter is small, (c) is another
It is a front view showing a curl device.

FIG. 10 is a sectional view showing another example of the conventional decurling device.
is there.

[Description of Signs ] 11, 51 Decurling Device 13 Roll Paper Holder (Holding Member) 15 Recording Paper 17 Conveying Roller ( Conveying Means) 24, 54 Decal Roller (Decaling Member) 26, 52 Decurling Means 43 Pressure Plate 44 Roller 53 Turn Roller 55 Decal release means 57 Guide member 61 Driving force intermittent means F ₀ Pressing force F ₁ Back tension F Decal force P Decal operating position Q Non-operating position

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B65H 23/34 B41J 15/04 B41J 15/16 B65H 16/02

Claims (3)

(57) [Claims] 1. A front side from a holding member for holding a recording paper roll.
Curled toward the inside of the drawing paper
Decal having decurling means for removing curl of the recording paper
The decurling means is provided on a side of the holding member.
Biasing section that presses the recording paper roll provided in the section in the axial direction
Material and the lower side of the recording paper roll in front of the bottom of the holding member.
The shaft center is provided so that it can come and go, and is almost parallel to the recording paper roll.
And a roller having a pull-out load of the recording paper.
A decal device characterized in that it is made into a decal. 2. The paper is wound in a roll shape and has a
Direction of pulling out the recording paper of the conveyance means for pulling out the rolled recording paper
An upstream side, which engages with the recording paper and
Decal device having decurling means except for
The decurling means, wherein the drawn and curled recording
The paper is guided inside the recording paper in contact with the inner surface of the recording paper.
Turn roller, and the turn roller and the conveying means.
The recording paper is provided in contact with the outer surface of the recording paper and the recording paper is
A decal member having a curved surface that is inverted to the outside of the
The decurling member is provided near the decurling means.
When the decal operation for pulling out and reversing the recording paper is stopped
A decurling operation for performing the decurling operation on the decurling member.
Decal release means for moving from the working position, and the decal
Holder for holding and detaching the handle member in the decal operation position
And a decal from the decal operating position.
A guide member for guiding to a non-operating position in which no roller operation is performed;
A decurling device, comprising: 3. The paper is wound in a roll shape and has a
Direction of pulling out the recording paper of the conveyance means for pulling out the rolled recording paper
An upstream side, which engages with the recording paper and
Decal device having decurling means except for
The decurling means, wherein the drawn and curled recording
The paper is guided inside the recording paper in contact with the inner surface of the recording paper.
Turn roller, and the turn roller and the conveying means.
The recording paper is provided in contact with the outer surface of the recording paper and the recording paper is
A decal member having a curved surface that is inverted to the outside of the
The decurling member is provided near the decurling means.
When the decal operation for pulling out and reversing the recording paper is stopped
A decurling operation for performing the decurling operation on the decurling member.
Decurling means for moving from the working position, and
Transmitting and blocking the driving force of the step to the decurling means;
And a driving force interrupting means.
Device.