JP2003063743A - Roll sheet retaining device and recording device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roll sheet retaining device capable of facilitating an attachment of a roll sheet and certainly retaining it; and a recording device provided with this. SOLUTION: The roll sheet retaining device for turnably retaining a roll sheet has a first flange inserted to the roll sheet and having a pivotable shaft 6; and a second flange 10 fitted to the pivotable shaft 6 and capable of relatively not being turned against the pivotable shaft and being axially moved.

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. 9, 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. 10, the movable member 113 is fixed to the fixed member 111 by the 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. 11, the length of the holding member 121 is changed according to the width of the roll sheet, and the paper tubes are 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. 12, 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 adapted to the width of the roll sheet, and the movable flange 136 is inserted.
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 only the paper tube is held and the roll sheet is not held as in the conventional example shown in FIG. 10, when the roll sheet pulled out more than necessary is rewound, the sheet side surfaces are aligned and rewound. Difficult to do.

(3) As in the conventional example shown in FIGS. 9 and 10,
If the flanges are screwed together, the screwed connections may loosen when the roll sheet is pulled out or rewound, and the paper tube / roll sheet may not be held firmly and accurately.

The present invention is to solve the above-mentioned conventional problems, 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 a recording device having the roll sheet holding device. It is provided.

[0016]

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. It has a reference flange which has, and a moving flange which is fitted to the above-mentioned rotating shaft and is not rotatable relative to the rotating shaft and is movable in the axial direction.

[0017]

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 sectional explanatory view of a roll sheet holding device according to the first embodiment, FIG. 2 is a schematic explanatory view of a recording device using a roll sheet, and FIG. 3 is a perspective view of the holding device. FIG.

(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 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 has a first flange (reference flange) 4 serving as a contact 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) 5 serving as a contact surface and a rotary shaft 6 arranged in the axial direction of the paper tube, and these are integrally connected.

As shown in FIG. 3, the rotary shaft 6 is provided with three holding ribs 7, 8, 9 having the same cross-sectional shape and the tips located on the same circle on the rotary shaft 6 at equal angular intervals. Is provided,
Each of the holding ribs 7, 8 and 9 has a plurality of locking grooves 7 that engage with locking claws described later at positions corresponding to a plurality of roll sheet widths.
a, 7b, 7c ... and 8a, 8b, 8c ... and 9
a, 9b, 9c ... Are provided.

Reference numeral 10 is a second flange (moving flange) which is a contact surface of the other end surfaces of the paper tube 1 and the roll sheet 2. The second flange 10 is provided with an elastic body 11 formed integrally with the second flange 10, and when the operation portion 11a is pulled up, the locking claw 11b that engages with the locking groove provided in the rib.
Is disengaged from the locking groove, and the second flange 10 is movable on the rotary shaft 6 in the axial direction.

Further, the second flange 10 guides the hole 10a through which the rotary shaft 6 passes and the holding ribs 7, 8 and 9, and the locking claw 11 is formed.
Guide ribs 10b and 10c for rotationally aligning the rotary shaft 6 are provided at positions where b is engaged with the locking groove (for example, 7a).

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

First, the rolled paper tube 1 of the roll sheet 2 is pressed into the first flange 4. Next, the second flange 10 is inserted into the rotary shaft 6. Then, the second flange 10 is pushed into the rotary shaft 6 until it comes into contact with the paper tube 1, and the locking claw 11b is engaged with the locking groove (for example, 7a).

At the start of insertion of the second flange 10, the rotary shaft 6
Holding rib and two guide ribs 10 on the second flange 10.
Even when the holding rib guide groove 10d as a locking portion constituted by b and 10c is out of phase with each other, as shown in FIGS.
By inserting the second flange 10 into the rotary shaft 6 while abutting on b and 10c, the holding rib (for example, 7) of the rotary shaft 6 and the holding rib guide groove 10d are in phase at the end of the insertion. . The paper tube 1 is not shown in FIGS. 3 to 5.

The engaging grooves 7a, 8a, 9a ... Are provided in each of the three holding ribs 7, 8, 9 but the engaging claw 11b is provided.
Only one engages with.

By the above-mentioned operation, the paper tube 1 is sandwiched between the first and second flanges 4 and 10, and the paper tube 1 and the roll sheet 2 are loaded into the roll sheet holding device B so that they can rotate integrally.

(Effect of Engagement of Flange and Holding Rib) Next, the second flange 10 and the rotating shaft 6 are not fitted to each other by the outer diameter of the rotating shaft 6, and the holding ribs 7, 8, 9 The merits of what is done by

The first merit is to prevent the first flange 4 and the second flange 10 from slipping in the rotational direction.

When the roll sheet 2 is rewound, a method of applying a turning force to one of the first and second flanges 4 and 10 is generally used to simplify the drive mechanism. In this case, when the sliding in the rotational direction occurs between the driving side flange and the driven side flange, the roll sheet 2 has a difference in feed speed in the width direction, and skew, wrinkles, scratches on the end surface, and the like occur.

In this embodiment, since the holding ribs 7, 8, 9 of the first flange 4 and the guide groove 10d of the second flange are engaged with each other, there is no risk of slippage in the rotational direction.

The second merit is an advantage in molding. When manufacturing a hollow shaft that is long in the axial direction by molding, in general, a draft is required for the inner diameter, so if a uniform thickness is used to avoid sink marks during molding, the hollow shaft will have a gradient Occurs. That is, the outer shape of the hollow shaft becomes a conical shape, and the backlash with the fitting object becomes large.

In this embodiment, the fitting portion between the second flange 10 and the rotary shaft 6 is limited to only the rib tip,
The mold for molding the ribs is divided by a plane including the center of the rotating shaft, so that even if the outer shape of the hollow shaft is inclined, the rib tips are not inclined.

(Abutting Surface of Fixed Side Flange) Next, the features of the fixed side flanges (first flange and third flange) will be described.

The contact surface of the third flange 5 with the roll sheet 2 is at a position lower than the contact surface of the first flange 4 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 4, the end surface of the roll sheet 2 and the contact surface of the third flange 5 A gap is formed between them. This is because when the roll sheet 2 is wound slightly protruding from the paper tube 1, the third flange 5
If the surface of the roll sheet 2 is the same as the surface of the first flange 4, the position of the contact surface of the first flange 4 is determined by the paper tube 1, and the roll sheet 2 slightly protruding from the paper tube 1
The purpose is to prevent the end surface from being damaged by being pressed against the contact surface of the third flange 5.

(For roll sheets with 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, this can be dealt with by moving the position of the second flange 10 according to the length of the paper tube. That is, by providing a plurality of locking grooves according to a plurality of paper tube lengths and locking the locking claws 11b in desired locking grooves (for example, 7a), the paper tubes 1 having different lengths can be easily used. You can Further, as shown in FIGS. 3 to 5, the second flange 10 is fixed in the axial direction by one locking claw 11.
Since it is performed by b, the locking of the locking claw 11b and the locking groove can be released with good operability.

In the present embodiment, as described above, since the flange for pressing the roll sheet and the fixed shaft are locked at one place, the roll sheet can be easily attached / detached.

Also, by providing a plurality of locking grooves, it becomes possible to easily fix paper tubes of different widths.

Further, since the flange for pressing the roll sheet and the fixed shaft are securely fixed and do not rotate relative to each other, it is possible to prevent the sheet from skewing, wrinkling, and scratching.

Further, the guide mechanism for guiding the flange into the rib of the fixed shaft facilitates the insertion of the flange into the fixed shaft.

Second Embodiment FIGS. 6 to 8 are perspective explanatory views of a roll sheet holding device according to a second embodiment.
In the figure, 23 is a holding member, a first flange 24 that is pressed into the inner diameter of the paper tube to hold the paper tube and is a contact surface of the end surface of the paper tube, and a third flange 25 that is a contact surface of the end surface of the roll sheet, The rotary shaft 26 is arranged in the paper tube axial direction, and these are integrally connected.

The rotary shaft 26 is provided with three holding grooves 27, 28, 29 having the same sectional shape and bottom surfaces on the same circle at equal angular intervals on the rotary shaft 26. The grooves 27, 28, 29 have a plurality of locking grooves 27a, 27b, 27c ... And 28 which engage with locking claws described later at positions corresponding to a plurality of roll sheet widths.
a, 28b, 28c ... And 29a, 29b, 29c ... Are provided.

30 is a second flange. Second flange 30
Is provided with an elastic body 31 that is integrally formed with the second flange 30, and when the operating portion 31a is pulled up, the locking claw 31b that engages with the locking groove provided on the rib is locked by the locking groove (for example, 27a). ), The second flange 30 becomes movable on the rotary shaft 26 in the axial direction.

Further, the second flange 30 has a hole 30a through which the rotary shaft 26 passes, and sliding ribs 41 and 4 which are fitted into the holding groove and slide.
2, 43 are provided. The tips of the sliding ribs are chamfered so that the sliding ribs 41, 42 and 43 can easily fit into the holding grooves 27, 28 and 29. By this chamfering and the chamfering 50 provided in the insertion portion of the rotating shaft 26, the second flange 30
Follows the rotating shaft 26, and the locking claw 31b has a locking groove (for example, 27a).
Is moved to a position where it is engaged with and fixed.

Even with this configuration, the same effect as that of the first embodiment described above can be obtained.

[0050]

Since the present invention is constructed as described above,
The roll sheet can be easily attached and detached, and the roll sheet can be securely fixed to prevent the sheet from skewing, wrinkling, and scratches.

[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 a perspective explanatory view of a roll sheet holding device.

FIG. 4 is a perspective explanatory view of a roll sheet holding device.

FIG. 5 is a perspective explanatory view of a roll sheet holding device.

FIG. 6 is a perspective explanatory view of a roll sheet holding device according to a second embodiment.

FIG. 7 is a perspective explanatory view of a first flange according to the second embodiment.

FIG. 8 is a perspective explanatory view of a second flange according to the second embodiment.

FIG. 9 is an explanatory diagram showing a roll sheet holding structure according to a conventional technique.

FIG. 10 is an explanatory diagram showing a roll sheet holding structure according to a conventional technique.

FIG. 11 is an explanatory diagram showing a roll sheet holding structure according to a conventional technique.

FIG. 12 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 4 ... First flange 5 ... Third flange 6 ... Rotating axis 7, 8, 9 ... Retaining rib 7a, 7b, 7c ... Locking groove 8a, 8b, 8c ... Locking groove 9a, 9b, 9c ... Locking groove 10… Second flange 10a ... hole 10b, 10c ... Guide rib 10d ... Retaining rib guide groove 11 ... elastic body 11a ... Operation part 11b… Locking claw 23 ... Holding member 24… First flange 25… Third flange 26… Rotation axis 27, 28, 29… Retaining groove 27a, 27b, 27c ... Locking groove 28a, 28b, 28c ... Locking groove 29a, 29b, 29c ... Locking groove 30… Second flange 30a ... hole 31 ... elastic body 31a ... Operation part 31b ... Locking claw 41, 42, 43… Sliding ribs 50… Chamfer 200… Recording section 200a ... Platen roller 200b ... Thermal head 201… Cutter 202… Ejection roller

Claims (11)

[Claims] 1. A roll sheet holding device for rotatably holding a roll sheet, wherein a reference flange having a turning shaft inserted into the roll sheet and a fitting to the turning shaft are provided with respect to the turning shaft. A roll sheet holding device comprising: a moving flange that is not relatively rotatable and is movable in the axial direction. 2. The roll sheet holding device according to claim 1, wherein the moving flange is locked so as not to rotate relative to the rotating shaft. 3. The roll sheet holding device according to claim 1, wherein the moving flange has a locking member that restricts axial movement with respect to the rotating shaft. 4. The rotation shaft has a plurality of holding ribs, and the moving flange has a locking portion that locks with the holding rib and is locked so as not to rotate relative to the rotation shaft. The roll sheet holding device according to claim 2, wherein: 5. The roll sheet holding device according to claim 4, wherein the moving flange has a guide for guiding the holding rib to the locking portion. 6. The roll sheet holding device according to claim 4, wherein the holding rib has a locking groove for positioning and locking the moving flange in the axial direction of the rotating shaft. 7. The roll sheet holding device according to claim 1, wherein the rotating shaft has a plurality of holding grooves, and the moving flange has a holding projection that fits into the holding grooves. 8. The roll sheet holding device according to claim 7, wherein the holding groove has a locking groove for positioning and locking the moving flange in the axial direction of the rotating shaft. 9. The roll sheet holding device according to claim 8, wherein the moving flange has a locking member that can be engaged with the locking groove. 10. The roll sheet holding device according to claim 7, wherein the rotating shaft has a guide for guiding the holding protrusion to the holding groove. 11. A recording device for recording on a roll sheet, comprising the roll sheet holding device according to any one of claims 1 to 10 for rotatably holding the roll sheet. Recording device.