JP2003063708A - Roll sheet holder and recorder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roll sheet holder enabling easy fitting of a roll sheet, and reliably holding it, and a recorder having the holder. SOLUTION: The roll sheet holder which turnably holds the roll sheet 2 wound around a paper tube 1 comprises a rotatable first flange 5 and a rotatable second flange 10 which hold a paper tube 1 form both sides, and a first spring 11 which urges the second flange, and presses the paper tube 1 against the first flange 5 side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll sheet holding device that holds a roll sheet used for recording and supplies the roll sheet to a printer, and a recording device including the roll sheet holding device.

[0002]

2. Description of the Related Art When supplying a long sheet to a printer,
Alternatively, in order to continuously supply the recording sheets, a method may be adopted in which a long recording sheet is wound around a paper tube in a roll shape to form a roll sheet, which is loaded into an apparatus and supplied to a recording unit.

The roll sheet is used while being held by a holding member rotatable with respect to the printer. At this time, it is necessary to align the roll sheet with the recording reference position. In particular, in order to accurately arrange the roll sheet at a predetermined position, it is necessary to provide a flange for guiding the paper tube or the roll sheet.

Further, the roll sheet may be pulled out toward the recording portion, back tension may be applied in the direction opposite to the pull-out direction in order to prevent wrinkles and skew, and may be rewound in the direction opposite to the pull-out direction. Therefore, the paper tube needs to be firmly connected to the holding member.

Further, when there are several kinds of recording sheet widths,
Naturally, there are several roll sheet widths. Therefore, the holding member and the flange are required to firmly and accurately hold the paper tube / roll sheet having various widths.

Conventionally, various methods have been used for the holding member and the flange. Typical examples include the following configurations.

In the structure shown in FIG. 12, the flange 102 is screwed to the holding member 101, and the flange is screwed in until the flange 102 contacts the roll sheet.

In the structure shown in FIG. 13, a movable member 113 is fixed to a fixed member 114 by a pressure member 112.
It presses in the direction and presses the paper tube from the left and right to hold it (JP-A-02-062351, etc.).

In the structure shown in FIG. 14, the length of the holding member 121 is changed according to the width of the roll sheet, and the paper tube is sandwiched and held by the flanges 122 and 123 from the left and right (Japanese Patent Laid-Open No. 10-287007, etc.).

In the structure shown in FIG. 15, a plurality of grooves 132, 133, and 134 are provided on the outer periphery of the holding member 131, the fixed side flange 135 is inserted into the groove that fits the width of the roll sheet, and the movable flange 136.
Are screwed together, and the flange is screwed in until it comes into contact with the roll sheet (Japanese Patent Laid-Open No. 10-133289, etc.).

[0011]

However, the above-mentioned conventional example has the following problems.

(1) When loading a roll sheet, especially when replacing a roll sheet with a different sheet width, the operation becomes complicated.

(2) When the flange position is uniquely determined with respect to the roll sheet width as in the conventional example shown in FIGS. 14 and 15, if the length of the paper core varies, the roll sheet is set to the recording reference position. It will be difficult to align them with and accurately arrange them.

(3) Generally, the seat width slightly changes due to humidity change, but in the conventional example, the flange position is determined with respect to the roll seat width at the time of loading. If the roll sheet is damaged or contracted, it becomes difficult to align the roll sheet with the recording reference position and dispose it with high precision.

(4) As in the conventional example shown in FIG. 13, when only the paper tube is held and the roll sheet is not held, when the roll sheet pulled out more than necessary is rewound, the sheet side surfaces are aligned and wound. Difficult to put back.

(5) When detecting the width of the roll sheet, the method of detecting the flange position is simple, but FIGS.
In the system in which the flange position changes due to the variation of the roll sheet width as in the conventional example shown in (1), there is a possibility of erroneous detection when the difference in sheet width is small.

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to provide a roll sheet holding device capable of easily and securely holding a roll sheet and recording provided with the roll sheet holding device. A device is provided.

[0018]

A typical structure according to the present invention for achieving the above object is a roll sheet holding device for rotatably holding a roll sheet wound around a tubular member. A rotatable tube reference flange and a tube pressing flange that sandwich the tube from both sides, and a tube pressing unit that urges the tube pressing flange and presses the tubular member toward the tube reference flange side. To do.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Next, a roll sheet holding device according to an embodiment of the present invention and a recording device having the same will be described with reference to the drawings.

[First Embodiment] FIG. 1 is a cross-sectional explanatory diagram of a roll sheet holding device according to the first embodiment, and FIG. 2 is a schematic explanatory diagram of a recording device using a roll sheet.

{Recording Device} The recording device A of the present embodiment records on a roll sheet, and as shown in FIG. 2, the roll sheet 2 held by the roll sheet holding device B is pulled out to the recording section 200. After the predetermined recording is performed by the recording unit 200, the sheet is cut by the cutter 201, and the discharge roller 202
Is discharged to the outside of the aircraft.

In the recording section 200 of this embodiment, the thermal head 200b is pressed against the platen roller 200a.
Then, the platen roller 200a is rotated while sandwiching the roll sheet 2 between them, and the thermal head 200b is caused to generate heat in accordance with an image signal, whereby a predetermined image is recorded on the roll sheet 2 composed of a long heat-sensitive sheet. It uses a thermal recording method.

However, the structure of the recording unit 200 is not limited to the heat-sensitive recording system, and a thermal transfer recording system or an inkjet recording system may be used. In that case, plain paper can be used as the roll sheet. .

{Roll Sheet Holding Device} Next, the roll sheet holding device B used in the recording apparatus A will be described with reference to FIG.

In FIG. 1, reference numeral 1 denotes a tubular member made of paper or the like (hereinafter referred to as "paper tube"), and a long recording sheet is wound around the tubular member to form a roll sheet 2.
Reference numeral 3 denotes a holding member that press-fits into the inner diameter of the paper tube to hold the paper tube 1 and also serves as a first flange (tube reference flange) 5 that serves as an abutting surface of the one end surface of the paper tube 1 and one end surface of the roll sheet 2. It is composed of a third flange (sheet reference flange) 6 which serves as a contact surface of and a rotating shaft 7 arranged in the axial direction of the paper tube, and these are integrally connected.

The contact surface of the third flange 6 with the roll sheet 2 is at a position lower than the contact surface of the first flange 5 with the paper tube 1. That is, when the end surface of the paper tube 1 and the end surface of the roll sheet 2 are on the same plane, when the paper tube 1 comes into contact with the contact surface of the first flange 5, the end surface of the roll sheet 2 and the contact surface of the third flange 6 A gap is formed between them.

Reference numeral 8 is a fifth flange (moving flange) which is fitted to the rotating shaft 7 and is movable in the axial direction. Reference numeral 9 is an elastic body that is integrally formed with the fifth flange 8. When the operating portion 9a is pulled up, locking grooves 7a, 7 provided on the rotary shaft 7 are provided.
The locking claw 9b that engages with either b or 7c is disengaged from the locking groove, and the fifth flange 8 can move on the rotating shaft 7.

Reference numeral 10 is a second flange (tube pressing flange) for pressing the end surface of the paper tube, which includes a fifth flange 8 and a second flange.
The paper tube 1 is pressed against the first flange 5 by the pressing force A by the first spring 11 arranged between the ten. The outer diameter of the second flange 10 is smaller than the outer diameter of the paper tube 1.

Reference numeral 12 is a fourth flange (sheet pressing flange) for pressing the end surface of the roll sheet, and the second flange 13 arranged between the fifth flange 8 and the fourth flange 12 causes the fourth flange 12 to move to the roll sheet 2 It is pressed by the pressing force B to the end face of the.

(Fourth Flange Shape) Next, the fourth flange
The 12 shapes will be described. If the outer diameter of the second flange 10 is larger than the outer diameter of the paper tube 1, if the end surface of the roll sheet 2 is slightly protruding from the paper tube 1, the second flange 10
Is abutted on the end surface of the roll sheet and cannot press the paper tube 1 (see FIG. 3 (a)). Therefore, the outer diameter of the second flange 10 needs to be smaller than the outer diameter of the paper tube 1.

However, although the inner diameter of the fourth flange 12 is movable by fitting to the outer diameter of the second flange 10, if the outer diameter of the second flange 10 is smaller than the outer diameter of the paper tube 1, the roll sheet When the end surface of 2 is inside the end surface of the paper tube 1, the fourth flange 12 cannot contact the end surface of the roll sheet (see FIG. 3 (b)).

Therefore, as shown in FIG. 4 (a), a step is provided on the fourth flange 12 so that the fourth flange 12 can contact the end surface of the roll sheet even if the end surface of the roll sheet is inside the end surface of the paper tube. A method to make But,
When the roll sheet 2 is running low, Fig. 4 (b)
As shown in, the roll sheet 2 is sandwiched between the outer diameter of the paper tube 1 and the step of the fourth flange 12, and in this state,
If you try to pull out the roll sheet, the end of the roll sheet may be damaged.

Therefore, in the present embodiment, as shown in FIG. 5, a chamfer which is an inclined surface in the vicinity of the inner diameter of the fourth flange 12 from a position having a radius larger than the outer diameter of the paper tube toward the center of rotation.
12a is applied. By doing so, even if the end surface of the roll sheet is inside the end surface of the paper tube, the fourth flange 12 can contact the end surface of the roll sheet. It is not pinched between the outer diameter of No. 1 and the fourth flange 12, and there is no risk of damaging the end of the roll sheet.

(Roll Sheet Loading Procedure) Next, a procedure for loading the paper tube 1 and the roll sheet 2 into the roll sheet holding device will be described.

First, the rolled paper tube 1 of the roll sheet 2 is pressed into the first flange 5. Next, the fifth flange 8 is inserted into the rotary shaft 7. Then, the fifth flange 8 is pushed in until the second flange 10 contacts the paper tube 1. Furthermore, until the locking claw 9b engages with the predetermined locking grooves 7a, 7b, 7c,
The fifth flange 8 is pushed in while charging the first spring 11.

By the above operation, the paper sheet 1 and the roll sheet 2 are moved to the roll sheet holding device B by the second flange 10.
Be loaded into.

At this time, the paper tube 1 is pressed against the first flange 5 by the second flange 10, and the fourth flange 12 is pressed against the end surface of the roll sheet. Since the paper tube 1 is press-fitted into the fifth flange 8, the paper tube 1 and the roll sheet 2 can rotate together with the holding member 3.

The roll sheet holding device of this embodiment has means for pressing the paper tube 1 and the roll sheet 2. Next, the structure of the pressing means will be described.

(Paper tube pressing means) First, the first pressing means (tube pressing means) for pressing the paper tube 1 toward the first flange 5 will be described.

The second flange 10 can project from the fifth flange 8, and the maximum amount of projection is restricted by a stopper (not shown) provided on the fifth flange 8. .

When the fifth flange 8 is inserted into the rotary shaft 7,
The second flange 10 first comes into contact with the paper tube 1 in a state where the second flange 10 protrudes to the maximum extent from the fifth flange 8. At this time, the locking claw 9b is
Even if the paper tube / roll sheet is shortened in the width direction due to variations or drying, the locking grooves 7a, 7
It is arranged at a position where it does not engage with b and 7c.

When the fifth flange 8 is further pushed in, the locking claw 9b causes the locking groove (for example, the standard width of A4, B5, etc.) of the roll sheet 2 of the locking grooves 7a, 7b, 7c (for example, a locking groove) to be formed. 7b), the fifth flange 8 is locked to the holding member 3 by the engagement of the locking claw 9b and the locking groove 7b. At this time, the second flange 10 has not yet reached the position where it protrudes to the maximum extent from the fifth flange 8 even if the paper tube 1 is shortened in the width direction due to variations or drying, that is,
The first spring 11 is charged and the second flange 10
Presses the paper tube 1.

Even when the second flange 10 is maximally protruded from the fifth flange 8, the first spring 11 causes the second flange 10 to project.
The length is determined so as to press 10 against the fifth flange 8 (precharge), and the spring force changes even if the distance between the second flange 10 and the fifth flange 8 changes due to variations in the paper tube length. Is small, that is, the force with which the second flange 10 presses the paper tube 1 does not change significantly even if the paper tube length changes.

The force of the first spring 11 is equal to the force of the fifth flange 8
A very large force (A) is required in order to press the paper tube 1 press-fitted in the axial direction into contact with the contact surface. Due to this spring force, the paper tube 1 is pressed against the first flange 5 and loaded into the holding member 3 without play. Therefore,
Even if the length of the paper tube 1 varies due to manufacturing, the variation amount is absorbed by the charge amount of the first spring, so that the holding member 3 can be loaded without play without being affected by the variation in the paper tube length. It is possible to

In the present embodiment, the paper tube 1 is
The maximum width is L11 and the minimum width is L12 when the variation and expansion / contraction of the paper tube 1 are taken into consideration.
The pressing force between the second flange 10 and the fifth flange 8 in the maximum width L11 is P11, and the second flange in the minimum width L12 is
When the pressing force between 10 and the fifth flange 8 is P12, even if the fifth flange 8 is fixed at any fixing position corresponding to a plurality of nominal widths of the paper tube / roll sheet,
The first spring so that the value of P12-P11 | falls within a predetermined range.
11 biases have been set.

(Roll Sheet Pressing Means) Next, the second pressing means (sheet pressing means) for pressing the roll sheet 2 toward the first flange 5 will be described. The basic configuration is paper core 1
The pressing structure is the same as that of.

The fourth flange 12 can project from the fifth flange 8, and the maximum amount of projection is restricted by a stopper (not shown) provided on the fifth flange 8.

When the fifth flange 8 is inserted into the rotary shaft 7,
The fourth flange 12 first comes into contact with the roll sheet 2 while being protruded to the maximum extent from the fifth flange 8. At this time, even if the roll sheet 2 is shortened in the width direction due to variations or drying of the roll sheet 2, the locking claws 9b can be locked in the locking grooves 7a,
It is arranged at a position where it does not engage with 7b and 7c.

When the fifth flange 8 is further pushed in, the locking claw 9b engages with the locking groove (for example, 7b) corresponding to the nominal width of the roll sheet 2 among the locking grooves 7a, 7b, 7c, and the fifth The flange 8 is locked to the holding member 3 by the engagement of the locking claw 9b and the locking groove 7b. At this time, the fourth flange 12 has not reached the position where it protrudes to the maximum extent from the fifth flange 8 even if the roll sheet 2 is shortened in the width direction due to variations or drying, that is, the second spring 13 In the charged state, the fourth flange 12 is the roll sheet 2
Press.

The second spring 13 allows the fourth flange 12 to protrude to the maximum extent from the fifth flange 8 even when the fourth flange 12 is maximally protruding.
The length is determined so as to press 12 against the fifth flange 8 (precharge), and even if the distance between the fourth flange 12 and the fifth flange 8 changes due to the variation in the roll sheet width, the change in spring force does not change. The pressure is small, that is, even if the width of the roll sheet changes, the force with which the fourth flange 12 presses the roll sheet 2 does not change significantly.

Further, even if there are variations in the width of the roll sheet 2 due to manufacturing, the variation amount is absorbed by the charge amount of the second spring 13, so that there is no effect of variation in the roll sheet width and there is no rattling. It is possible to load the holding member 3.

The fourth flange 12 is provided as a guide for winding the unwound roll sheet 2 with the end surfaces aligned, and the force (B) applied to the roll sheet 2 is It is sufficient if it is not less than the skewing force (C) of the sheet to be rewound.

Further, the pressing force of the fourth flange 12 has an upper limit value for the following reason.

Generally, the length of a sheet such as paper changes depending on the humidity. In the roll sheet 2, a change in length due to moisture absorption remarkably appears as a change in sheet width. When the roll sheet 2 is wound around the paper tube 1, the work is not performed under high humidity, so that the width change of the roll sheet due to moisture absorption appears as an increase in sheet width due to an increase in moisture absorption amount. In particular, the portion located on the outer peripheral side (unwinding side) of the roll sheet 2 is greatly affected by moisture absorption. Further, the width of the paper tube also varies, but the amount of change is larger in the roll sheet having a larger surface area than the volume than in the paper tube 1 made of cardboard or the like.

FIG. 6 shows the state of the roll sheet having an increased moisture absorption amount. As can be seen from this, if the pressing force of the fourth flange 12 is unnecessarily large, an excessive pressing force is applied to the roll sheet 2 on the outer peripheral portion, and the seat side surface is damaged. Therefore, it is necessary to set the pressing force of the fourth flange 12 to a force slightly stronger than the skewing force of the sheet to be rewound.

Therefore, in the roll sheet holding device of this embodiment, the pressing force of the second flange 10 (A), the pressing force of the fourth flange 12 (B), and the skewing force (C) of the sheet to be rewound. , And A>B> C.

Also in the second pressing means, as in the case of the first pressing means described above, the maximum width in the case of considering the variation and expansion / contraction of the roll sheet 2 and considering the variation and expansion / contraction of the roll sheet 2. Is L21, the minimum width is L22, and the fourth flange 12 and the fifth flange 8 are at the maximum width L21.
The pressing force between P21 and the fourth flange 12 with the minimum width L22
When the pressing force between the fifth flange 8 and the fifth flange 8 is P22,
Even if the fifth flange 8 is fixed at any fixing position corresponding to a plurality of nominal widths of the roll sheet, | P22
The biasing force of the second spring 13 is set so that the value of -P21 | falls within a predetermined range.

(Abutting surface of fixed side flange) Next, fixed side flanges (first flange 5 and third flange 6)
Will be described.

The roll sheet 2 may be rolled out slightly protruding from the paper tube 1. Therefore, the third flange 6
If the contact surface of the first flange 5 is the same as the contact surface of the first flange 5, the position of the contact surface height of the first flange 5 is determined by the paper tube 1. Therefore, the roll sheet 2 slightly protruding from the paper tube 1 is The first spring 11 strongly presses the contact surface of the three flanges 6 and the end surface is damaged.

Therefore, in this embodiment, as shown in FIG. 7, a step is provided so that the contact surface of the first flange 5 slightly projects in the paper tube direction from the contact surface of the third flange 6.

(For roll sheets having different sheet widths)
Next, use of roll sheets having different sheet widths will be described. In the present embodiment, when the length of the paper tube 1 is different, it can be dealt with by moving the fifth flange 8 according to the length of the paper tube 1. That is, if a plurality of locking grooves 7a, 7b, 7c are provided in accordance with a plurality of paper tube lengths and the locking claw 9b is locked in a desired locking groove, the length of the length can be increased by the action of the pressing means. Different paper tubes can easily be used.

Further, when the roll sheet width is required as the recording information, the roll sheet width can be detected by detecting the position of the fifth flange 8 as shown in FIGS. 1 and 8. It is like this.

In FIGS. 1 and 8, 14 is a detection groove provided on the outer periphery of the fifth flange, and 15, 16, 17 are 15a, 16 respectively.
Detection levers that rotate around a, 17a, 18, 19, 20
Is a photo interrupter that detects the movement of the detection levers by intercepting the light rays entering the tips of the detection levers 15, 16 and 17, respectively.

The holding member 3 holds the paper tube 1 and the fifth flange 8.
Inserted into the lock groove according to the length of the paper core (groove 7b in Fig. 1)
When the locking claw 9b is engaged with, the detection lever (lever 15 in FIG. 1) corresponding to the locking groove corresponding to the length of the paper core falls into the detection groove 14 and separates from the photo interrupter to shield the light between the light receiving elements. To cancel. On the other hand, the detection lever (lever 16 in FIG. 1) in contact with the fourth flange 12 maintains the light interrupted state of the photo interrupter. For this reason, the photo interrupter
The paper core length can be detected by the signals of 18, 19, and 20.

9 to 11 show the relationship between the detection groove and the engagement groove with which the engagement claw 9b engages. FIG. 9 shows a case of holding a large size paper tube / roll sheet (for example, nominal width A3), and FIG. 10 shows a case of holding a medium size paper tube / roll sheet (for example, nominal width A4). Shows the case of holding a small size paper tube / roll sheet (for example, nominal width B5).

When the paper tube / roll sheet is held as described above, even if the paper tube length varies, the variation is absorbed by the pressing means as described above. It is uniquely determined by the calling length. Therefore, even a paper tube having a similar nominal width can detect the paper tube length without the risk of erroneous detection. Further, as shown in FIG. 8, by providing a plurality of detection lever shapes, the photo interrupters can be arranged at intervals, and it becomes possible to detect a smaller difference in the length of the paper tube.

By configuring the roll sheet holding device as described above, the following effects can be obtained in this embodiment.

(1) The operation of loading the roll sheet 2, especially when replacing the roll sheet with a different sheet width, is simplified.

(2) Even if there are variations in the length of the paper core, the roll sheet can be aligned with the recording reference position and accurately arranged.

(3) Since the holding member follows the change of the sheet width due to the change of humidity, the side surface of the sheet is not damaged even if the sheet width is extended.

(4) Even when the sheet width is reduced, the roll sheet can be accurately aligned and arranged at the recording reference position.

(5) Since the paper tube / roll sheet is pressed by the spring force, the paper tube / roller sheet is unnecessarily powerful, such as tightening screws.
/ Does not press the roll sheet, and there is no risk of damaging the paper core / roll sheet end surface.

(6) By precharging the flange, even if the width of the paper tube / roll sheet changes, the pressing force does not change significantly, and the paper tube / roll sheet is securely and without damaging the end surface. Can hold

(7) Since the fifth flange is moved for each nominal width of the paper tube / roll sheet, it is possible to always press the paper tube / roll sheet having different nominal widths with a substantially constant pressing force.

(8) Since not only the paper tube but also the roll sheet is held, when the roll sheet unwound more than necessary is rewound, the sheet side surfaces can be aligned and rewound.

(9) Even if there are variations in the width of the roll sheet, the flange position is constant for each nominal width of the roll sheet. Therefore, even if the difference between the nominal widths of the roll sheets is small, the flange position can be detected. Therefore, it is possible to accurately detect the nominal width of the roll sheet without being affected by the variation in the width of the roll sheet.

[0077]

Since the present invention is constructed as described above, the roll sheet can be easily mounted and held securely.

[Brief description of drawings]

FIG. 1 is a cross-sectional explanatory view of a roll sheet holding device according to a first embodiment.

FIG. 2 is a schematic explanatory view of a recording apparatus using a roll sheet.

FIG. 3 is an explanatory view showing a pressed state of the paper tube when the outer diameter of the second flange is larger than that of the paper tube and when it is smaller than that of the paper tube.

FIG. 4 is an explanatory diagram when a step is provided on the second flange.

FIG. 5 is an explanatory diagram of a second flange according to the first embodiment.

FIG. 6 is an explanatory diagram showing a state of a roll sheet having an increased moisture absorption amount.

FIG. 7 is an explanatory diagram of an embodiment in which a step is provided so that the contact surface of the first flange slightly protrudes in the paper tube direction from the contact surface of the third flange.

FIG. 8 is an explanatory diagram of a sheet width detection unit.

FIG. 9 is an explanatory diagram of a relationship between a locking groove with which a locking claw engages and a detection lever.

FIG. 10 is an explanatory diagram of a relationship between a locking groove with which a locking claw engages and a detection lever.

FIG. 11 is an explanatory diagram of a relationship between a locking groove with which a locking claw engages and a detection lever.

FIG. 12 is an explanatory diagram showing a roll sheet holding structure according to a conventional technique.

FIG. 13 is an explanatory diagram showing a roll sheet holding structure according to a conventional technique.

FIG. 14 is an explanatory diagram showing a roll sheet holding structure according to a conventional technique.

FIG. 15 is an explanatory diagram showing a roll sheet holding structure according to a conventional technique.

[Explanation of symbols]

A ... Recording device B: Roll sheet holding device 1… Paper tube 2 ... roll sheet 3 ... Holding member 5 ... First flange 6 ... Third flange 7 ... Rotation axis 7a, 7b, 7c ... Locking groove 8 ... Fifth flange 9 ... Elastic body 9a ... Operation unit 9b ... Locking claw 10… Second flange 11 ... First spring 12… Fourth flange 12a… Chamfer 13… Second spring 14… Detection groove 15, 16, 17… Detection lever 18, 19, 20,… Photo interrupter 200… Recording section 200a ... Platen roller 200b ... Thermal head 201… Cutter 202… Ejection roller

Claims (12)

[Claims] 1. A roll sheet holding device for rotatably holding a roll sheet wound around a tubular member, comprising a rotatable pipe reference flange and a pipe pressing flange for sandwiching the tubular member from both sides, and the pipe pressing member. A tube pressing means for urging a flange to press the tubular member toward the tube reference flange side. 2. A sheet pressing flange capable of contacting one side of the roll sheet, and a sheet pressing unit for urging the sheet pressing flange to press the tubular member toward the pipe reference flange side. The roll sheet holding device according to claim 1. 3. The pressing force of the tube pressing means is A, the pressing force of the sheet pressing means is B, and the force of the skewed sheet when the roll sheet is fed is C.
3. The roll sheet holding device according to claim 2, wherein the pressing force is set so as to have a relationship of A>B> C. 4. An inclined surface is provided on a contact surface of the sheet pressing flange with the roll sheet, the inclined surface extending from a position having a radius larger than an outer diameter of the tubular member toward a center direction. Item 2. A roll sheet holding device according to item 2. 5. The pipe pressing flange and the sheet pressing flange are fitted to a rotating shaft arranged in the axial direction of the tubular member, and form a unit structure with a moving flange movable in the axial direction. The roll sheet holding device according to claim 2, wherein the unit is movable in the axial direction while maintaining the combined state. 6. The roll sheet holding device according to claim 5, wherein the tube pressing flange and the sheet pressing flange are independently pressed against the moving flange. 7. The pipe pressing flange and the sheet pressing flange move independently of each other.
The roll sheet holding device described. 8. The moving flange is fixed to a rotary shaft at a position corresponding to the width of the roll sheet wound around the tubular member, and rotates integrally with the rotary shaft. 5. The roll sheet holding device according to item 5. 9. A maximum width in consideration of variations and expansion / contraction of the tubular member is L11, a minimum width in consideration of variations and expansion / contraction of the tubular member is L12, the pipe pressing flange in the maximum width L11 and the When the pressing force between the moving flanges is P11 and the pressing force between the pipe pressing flange and the moving flange at the minimum width L12 is P12, any fixed position corresponding to a plurality of nominal widths of the tubular member / roll sheet 6. The roll sheet holding device according to claim 5, wherein the pipe pressing means is configured such that the value of | P12-P11 | falls within a predetermined range even when the moving flange is fixed to the. 10. A maximum width in consideration of variations and expansion / contraction of the roll sheet is L21, a minimum width in consideration of variations and expansion / contraction of the roll sheet is L22, and the sheet pressing flange in the maximum width L21 and When the pressing force between the moving flanges is P21 and the pressing force between the pipe pressing flange and the moving flange in the minimum width L22 is P22, any fixed position corresponding to a plurality of nominal widths of the tubular member / roll sheet 6. The roll sheet holding device according to claim 5, wherein the sheet pressing means is configured such that | P22-P21 | falls within a predetermined range even when the moving flange is fixed to the sheet. 11. The roll sheet holding device according to claim 5, wherein the nominal width of the tubular member / roll sheet is detected by detecting the position of the moving flange. 12. A recording device for recording on a roll sheet, comprising the roll sheet holding device according to any one of claims 1 to 11 for rotatably holding the roll sheet. Recording device.