JPH11157711A - Winding shaft and printer using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a winding shaft for use in a printer, enabling recording paper to be neatly wound on the winding shaft and enabling the recording paper wound to be removed through a simple operation. SOLUTION: A winding shaft 23 has a winding shank for winding long recording paper 7, the winding shank being provided with a pair of support releasing members 234, (235) which project from a shaft main body. The support releasing members 234, (235) are formed at a position exceeding half the width of the recording paper from a flange 35 to which the side face of the recording paper abuts. A tensile force F is generated on the part of the recording paper 7 between a paper feed roller 11 and the support releasing member 234, and its component force (f) constantly brings the recording media toward a flange part to allow the recording media to be wound with their and faces neatly aligned. When the recording paper 7 wound is lightly rotated in the opposite direction to its winding direction, the support releasing members 234, 235 are prostrated in the same direction by an external force coming form the innermost recording paper 7, and the innermost recording paper wound on the winding shank floats from the outer peripheral surface of the shaft main body and loosens, so that the recording paper 7 becomes extracted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a winding shaft for winding a recording medium such as a journal paper and a printer using the same.

[0002]

2. Description of the Related Art For the purpose of managing sales and inventory at stores and the like, it has conventionally been required to store journal paper on which sales prices, product names, and the like are printed. A printer has been proposed in which the journal paper is wound around a winding shaft.

As a printer of this type, a printer as shown in FIG. 27 is conventionally known.

[0004] As shown in FIG.
Is a dot impact printer incorporated in a cash register or the like, a printer main body 103 to which a ribbon cassette 102 can be attached and detached, a clamshell movable part 104 rotatably supported at a position near the rear of the upper part of the printer main body 103, And a winding mechanism 105 provided at the rear of the printer main body 103.

In this printer, recording paper 106 such as journal paper printed by a print head (not shown)
Is moved by the paper feeding means 107 to the clamshell movable section 10.
4 and is sent to the writing table 108 for print correction.
Is wound around the winding shaft 109 of the winding mechanism 105 through the flat portion 108a.

[0006] The winding shaft 109 is connected to the printer main body 103.
The cantilever is supported rotatably on a support plate 110 fixed to the rear of the vehicle, and a disk-shaped winding flange 111 is fixed to a portion on the support plate 110 side. A driving gear 11 is provided at the end of the winding shaft 109 on the support plate 110 side.
2 is fixed. The take-up shaft 109 is driven to rotate by meshing with a gear group 114 driven by a take-up belt 113 interlocked with a paper feed mechanism in the printer main body 103 and a gear 112 fixed to the take-up shaft 109. It has become so.

[0007]

In the winding mechanism of this type of printer 101, it is necessary to arrange the recording paper 106 on a winding shaft 109 and wind it. The method of fixing the take-up shaft at an angle to the recording paper as shown in JP-A-144945 or the flange side of the take-up shaft portion of the take-up shaft as seen in Japanese Utility Model Application Laid-Open No. 58-125047. A method has been adopted in which the diameter on the entrance side is larger than the diameter on the front side.

However, in the method disclosed in Japanese Utility Model Laid-Open No. 57-144945, it is difficult to control the position of the take-up shaft, and interference between an unused portion of the recording paper and a flange portion of the take-up shaft poses a problem. It took time to establish the quality, including the design and evaluation of the mechanism.

In the method disclosed in Japanese Utility Model Application Laid-Open No. 58-125047, the diameter of the winding shaft portion on the entrance side is larger than that on the flange side of the winding shaft portion.
There is a problem that the winding start portion of the recording paper 106 remains on the winding shaft portion of the winding shaft 109 and cannot be removed easily, and the recording paper 106 protrudes from the winding shaft 109.

SUMMARY OF THE INVENTION The present invention has been made to solve such problems of the prior art. It is an object of the present invention to arrange a recording paper on a winding shaft and wind the recording paper. An object of the present invention is to provide a take-up shaft capable of removing recording paper by a simple operation and a printer using the take-up shaft.

[0011]

According to a first aspect of the present invention, there is provided a recording medium comprising: a flange portion for abutting a side surface of a recording medium; a winding shaft for winding the recording medium; A first position protruding from the outer periphery of the take-up shaft so as to come into contact with the recording medium, and a second position closer to the axis of the take-up shaft than the first position. And a support releasing means for moving the recording medium from the first position to the second position by a frictional force when the recording medium is moved. A winding shaft characterized by being provided at a position exceeding 1/2 of the width.

According to the first aspect of the present invention, the support releasing means protruding from the outer periphery of the winding shaft is provided at a position exceeding 1/2 of the width of the recording medium from the flange toward the leading end of the winding shaft. Have been. Further, since a rotational force for winding the recording medium is applied to the recording medium, tension is generated where the support release member is in contact. As described above, since the contact point is located at a position exceeding 1/2 of the width of the recording medium, a tension F is applied to the recording medium 7 between the paper feed roller 11 and the support release member 234 as shown in FIG. Then, the recording medium is constantly moved toward the flange portion by the component force f.
Therefore, the recording medium is wound around the winding shaft.
Further, when removing the wound recording medium, when the recording medium wound around the winding shaft is moved in a predetermined direction, the support release means is moved from the first position by an external force for removing the recording medium. Moving to the second position, the diameter of the winding shaft portion becomes apparently smaller. As a result, the innermost recording medium wound around the take-up shaft portion floats from the outer periphery of the take-up shaft portion and becomes loose, so that the recording media can be easily wound in a roll without dislocation. It can be removed from the take-up shaft.

Further, as in the second aspect of the present invention, it is also advantageous that the support releasing means is provided at a position from 2/3 to 10/11 of the width of the recording medium in the direction from the flange to the leading end of the winding shaft. It is a target.

According to the second aspect of the present invention, the support release means is provided at a position from 2/3 to 10/11 of the width of the recording medium from the flange toward the leading end of the winding shaft.
Since the recording medium is more efficiently wound around the take-up shaft, and the recording medium at the beginning of winding on the flange side is shorter than the circumference of the recording medium in the portion where the support releasing means exists, When removing the wound recording medium by holding the outer periphery of the recording medium without the support release means, the recording medium can be very easily removed from the winding shaft.

According to a third aspect of the present invention, there is provided a printing means for performing printing on a recording medium mounted on the apparatus main body, a paper feeding means for sequentially feeding the recording medium printed by the printing means in the longitudinal direction thereof, and And a winding mechanism configured to wind the recording medium fed by the paper feeding means with the winding shaft. Printer.

According to the third aspect of the invention, the printed recording medium can be arranged on a winding shaft and wound, and the recording medium wound on the winding shaft can be removed by a very simple operation. As a result, it is possible to obtain a printer having high winding quality of the recording medium and good operability when replacing the recording medium.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a winding mechanism according to the present invention and a printer using the same will be described in detail with reference to the drawings.

FIG. 1 is a perspective view showing an overall configuration of a printer according to an embodiment of the present invention, FIG. 2 is a plan view of the printer of FIG. 1, and FIG. 4 is a cross-sectional view taken along line CC of FIG. 2, and FIG. 5 is a rear perspective view of the printer of FIG.

As shown in FIG. 1, a printer 1 according to the present embodiment is a dot impact printer incorporated in a cash register or the like. And a winding mechanism 5 provided at the back of the printer body 3.

The printer body 3 includes a printing mechanism (not shown) for reciprocating a carriage (not shown) on which the print head 6 is mounted in the width direction of the recording papers 7 and 8, and the recording papers 7 and 8 at printing positions by the print head 6. A paper feed mechanism (not shown) for feeding and a drive motor 9 which is a drive source common to these printing mechanisms and paper feed mechanisms are provided.

On the other hand, the clamshell movable section 4 is disposed above the paper feed means 13, a paper feed means 13 comprising a platen 10, a paper feed roller 11 and a paper press roller 12 for pressing a recording paper against the paper feed roller 11. An automatic cutter mechanism 14 (see FIG. 2) for cutting the receipt paper 8 includes an upper paper guide 15 formed of resin.
Other components are mounted on the base.

Here, a projection (not shown) is formed on the upper paper guide 15 to engage with the hole 3a arranged on the frame 3A of the printer main body 3. The projection is engaged with the hole. It constitutes the rotation center shaft 16 of the clamshell movable part.

The upper paper guide 15 is also provided with a locking portion (not shown) which engages with a claw (not shown) rotatably mounted on the printer body 3. With the above configuration, the upper paper guide 15 is normally fixed at a fixed position by the claw portion, and by releasing the engagement between the claw portion and the locking portion, the rotation center shaft which is a support portion of the printer main body 3 is formed. It is rotated about 16.

As shown in FIGS. 4 and 5, the clamshell movable section 4 includes an upper paper guide 15 and a lower paper guide 19 extending from paper feed ports 17 and 18 at the rear of the printer body 3 to a printing position.
The printer is rotatably mounted at the upper rear position of the printer body 3 so as to expose the paper path 20 formed by the printer. In FIG. 4, a solid line indicates a closed state of the clamshell movable section 4, and a virtual line (two-dot chain line) indicates an open state of the clamshell movable section 4.

As shown in FIG. 2, the paper feed ports 17 and 18 are
The clamshell movable part 4 is arranged side by side at the rear part.

The paper feed port 17 is supplied with recording paper 7 such as journal paper stored at the store side for managing sales and inventory. As shown in FIG. 4, the recording paper 7 is arranged at the lower rear part of the printer main body 3, and the leading end thereof reaches the printing position from the paper feed port 17 through the paper path 20. Then, the recording paper 7 on which the printing has been performed is sequentially output to the discharge port 2.
From 1 through a writing table 22 provided above the clamshell movable section 4, it is wound on a winding shaft 23 of a winding mechanism 5 attached to a rear portion of the printer main body 3.

The take-up shaft 23 is rotatably supported by a support plate 24 fixed to the rear of the printer body 3 in a cantilever manner. A disk-shaped take-up flange 25 is integrated with the support plate 24 side. Is formed. In addition, winding shaft 2
A driving gear 26 is integrally formed at the end of the third support plate 24 side. Then, the take-up shaft 23 is connected to the take-up belt 2 linked to the paper feeding means 13 in the printer body 3.
Gear group 28, which is rotationally driven by the gear 7, and the winding shaft 23
Is driven to rotate by meshing with a gear 26 formed at the tip of the.

The winding shaft 23 has a paper feed path length at the end where the winding flange 25 is not provided.
It is inclined so as to be longer than the paper feed path length at the end on the side where the winding flange 25 is provided. In this case, as will be described later, since a measure for preventing the recording paper from meandering is taken by the present invention, an inclination angle of the winding shaft 23 smaller than that of the conventional example shown in FIG. 27 is sufficient.

On the other hand, the recording paper 8 such as receipt paper to be delivered to the customer is supplied to the paper supply port 18. This recording paper 8
Reaches the printing position through the same paper path 20 as the recording paper 7, and after being printed, is sent upward from a receipt discharge port 29 provided on the upper surface of the clamshell movable section 4.

As shown in FIG. 4, a stamp set 30 for imprinting a store name or the like is removably mounted below the paper feed port 18 where the recording paper 8 is fed.

The paper feed ports 17 and 18 are provided with a feed roller 31 for feeding the recording paper 7 and the recording paper 8. As shown in FIG. 4, the feeding roller 31 is provided at a position which is higher than the rotation center axis 16 of the clamshell movable part 4 by a predetermined amount, that is, at a position near the upper end of the rear part of the clamshell movable part 4. ing.

The feeding roller 31 is constantly rotating during the operation of the printer, and when the paper is fed by the driving force generated by the paper feed roller 11 when the recording paper 7 and the recording paper 8 are fed, A frictional force is generated between the feeding roller 31 and the paper, and the paper is fed in the transport direction. As a result, the paper feeding load caused by the inertial mass of the roll paper can be reduced.

The feed roller 31 has a roller shaft drive gear 32 disposed on the clamshell movable portion 4 side, and is rotatably attached to a portion 15 a of the upper paper guide 15 forming the paper feed ports 17, 18. Have been. A transmission gear 33 for meshing with the roller shaft drive gear 32 to rotate the feed roller 31 is provided on the printer body 3 side.
It is supported coaxially with the rotation center axis 16 of the clamshell movable section 4. With this configuration, the roller shaft drive gear 32 on the clamshell movable section 4 side and the transmission gear 3 on the printer body 3 side
3 means that the meshing state does not come off even when the clamshell movable part 4 is opened.

On the other hand, as shown in FIG. 2 or FIG. 5, an automatic cutter mechanism 14 for cutting the continuous recording paper 8 and a cutter driving source 34 for driving the automatic cutter mechanism 14 are provided in the clamshell movable section 4. Is equipped. The cutter driving source 34 for driving the auto cutter mechanism 14 is a high torque type motor, and the cutter frame 3 of the clamshell movable section 4
5, a writing table 22 for correcting journal print
The motor cover 3 is arranged under the
6 is covered.

When the printer is placed horizontally, it is preferable that the recording paper 77 be conveyed in a direction perpendicular to the line of sight in order for an operator such as a clerk to easily visually recognize the printing result of a receipt or the like. In the embodiment, the flat portion 2 of the writing table 22 is formed by pressing a metal plate.
2a is formed so as to be inclined toward the front side, and a space is formed below it. In the case of the present embodiment, a DC motor serving as the cutter driving source 34 is arranged by utilizing a space below the DC motor. The writing table 22 may be formed by processing a part of the cutter frame 35 obliquely.

On the other hand, in the present embodiment, a projection 220 for preventing the recording paper 7 from meandering is provided at the center in the paper width direction of the plane portion 22a of the writing table 22.
In the case of the present embodiment, the flat portion 22a of the writing table 22
At the both ends in the paper feeding direction of the sheet 2 by, for example, sheet metal processing.
20a and 220b are integrally formed.

FIG. 6 is a plan view showing the appearance of a winding shaft according to a first embodiment of the present invention, FIG. 7 is a detailed plan view of the embodiment, and FIG. FIG. 9A is a schematic view showing the internal configuration, and FIG. 9A is an explanatory view showing the principle of operation of the embodiment. The support release member is located at the first position, and the recording paper is wound around a winding shaft. FIG. 9 (b) showing the state of
Is an explanatory view showing the principle of operation of the embodiment, showing a collapsed state in which the support release member is located at the second position,
FIG. 10 is a configuration diagram showing the vicinity of a pressing member of the same embodiment. FIG. 11 is a front sectional view of the same embodiment.

As shown in FIGS. 6 and 7, the winding shaft according to the present embodiment is made of, for example, a resin material and includes a shaft main body 231 configured to include the center of rotation thereof. A pair of winding portions 23 formed so as to sandwich
2, 233, and these shaft main body 231 and winding section 23
The winding shaft 230 is constituted by 2, 233. Here, the winding units 232 and 233 are connected to the shaft main body 231.
And each surface is formed in an arcuate surface shape (however, it is not necessary to specify the arcuate surface shape).

On the other hand, the shaft main body 231 has a structure in which a pair of opposing rectangular plate members 231a and 231b are reinforced by ribs. A pair of support release members 2 at a position exceeding 1/2 of the width, particularly at a position of 2/3 to 10/11.
34 and 235 are provided and supported by the rib 231c. Here, each support release member 234, 235
Support shafts 234a and 235 are provided on both sides of the shaft body 231 respectively.
It is supported rotatably about a. Then, as shown in FIG. 8, a tension coil spring 236 is stretched between the support release members 234 and 235, rotates in the direction opposite to the direction of the arrow R (FIG. 9), and the locking projections 234c and 235c are wound up. By contacting the inner surface of the shaft 231, each of the support release members 234 and 235 stands up in a state where no external force is applied, so that each of the support portions 234 b and 235 b protrudes from the side of the shaft main body 231. In addition, this allows each support release member 2
As shown in FIG. 9B, the reference numerals 34 and 235 fall only in the direction opposite to the direction in which the recording paper 7 is wound.

Table 1 shows the positions of the support release members 234 and 235 from the flange 25 and the manner in which the wound recording paper is arranged. The winding diameter of the recording paper and the winding width are meandering (percentage (%) of the width of the recording paper). ). According to Table 1, when the width of the recording paper from the flange 25 is １ ／ or less, both the winding diameter and the meandering value are large, but when the width exceeds ２, the value is small. In particular, in the range of 2/3 to 10/11, the size is stably reduced.
When the ratio exceeds 10/11, the recording paper approaches the end of the recording paper. Therefore, even when the recording paper is thin, the end of the recording paper is elongated, and the effect is weakened.

[0041]

[Table 1]

As shown in FIGS. 6, 7, 8 and 10, the support release members 234 and 235 are connected to the shaft main body 23.
In order not to be deviated from 1, it is pressed by a pair of pressing members 237 and 238 having a substantially U-shaped cross section.

When the recording paper 7 is wound in this embodiment having such a configuration, as shown in FIG. 9A, the support release members 234 and 235 are in an upright state, that is,
Support portions 234b, 235 of support release members 234, 235
The recording paper 7 is wound up with b protruding from the shaft main body 231. At this time, the support release members 234 and 235 are moved from the flange 25 where the side surfaces of the recording paper are brought into contact with each other to reach 1/1 / of the width of the recording paper.
Tension F at a position exceeding 2, especially around 1/2 (Fig. 11)
If the position is set at 2/3 to 10/11, the recording paper 7 is provided with the paper feed roller 11 and the support release member 23.
4, the recording medium is steadily moved toward the flange portion by the component force f, and is wound up in a state where the end face is neatly arranged.

In this state, as shown in FIG. 9 (b), when the recording paper 7 is grasped by hand and lightly rotated in the direction opposite to the winding direction (the direction of arrow R), the recording paper 7a from the innermost peripheral recording paper 7a Each support release member 234, 2 by external force (frictional force)
35 falls in the same direction. As a result, the innermost recording paper 7a wound around the winding shaft portion 230 floats from the outer peripheral surface 231d of the shaft main body 231 and becomes loose, so that the wound recording paper 7 can be easily taken up by the winding shaft 23. Can be extracted from

FIGS. 12 to 14 show a winding shaft according to a second embodiment of the present invention. FIG. 12 is a detailed plan view of the winding shaft, and FIG. Schematic,
FIG. 14 is an explanatory diagram showing the principle of the operation of the embodiment. Hereinafter, portions corresponding to the above-described embodiment are denoted by the same reference numerals, and redundant description will be omitted.

As shown in FIGS. 12 to 14, the winding shaft 23A of this embodiment is provided with one support release member 234 having the same configuration as that of the above-described embodiment.

In this embodiment, a support release member 234 is supported on one side of the shaft main body 231 so as to be rotatable about a support shaft 234a. The tension coil spring 2 is provided between the claw portion 234e of the support release member 234 and the claw portion 231d provided on the other side of the shaft main body 231.
36 are passed over.

Also in the present embodiment having such a configuration, as shown in FIGS. 12 to 14, the recording paper is brought to the flange 25, the end face thereof is adjusted and wound up, and the wound recording paper is wound up. 7 by hand and lightly rotate in the direction opposite to the winding direction (the direction of arrow R), the innermost recording paper 7
a, the support release member 234 falls down in the same direction due to an external force from the innermost recording paper 7a wound around the winding shaft 230.
Is loosened from the outer peripheral surface 231 d of the shaft main body 231, so that the recording paper 7 can be easily pulled out from the winding shaft 23.

In this embodiment, there is an advantage that the structure of the winding shaft is simpler than in the first embodiment. The other configuration and operation and effect are the same as those of the above-described embodiment, and thus detailed description thereof will be omitted.

FIGS. 15 to 20 show a winding shaft according to a third embodiment of the present invention. FIG. 15 is a plan view of this embodiment, and FIG. Front sectional view,
FIG. 17 is a front structural view showing a main part of the embodiment, and FIG.
8 is a detailed plan view showing a main part of the embodiment, and FIG.
(A) is an explanatory view showing the principle of operation of the embodiment,
FIG. 19 shows a state in which the recording paper is wound around a winding shaft.
(B) and FIG. 20 are explanatory views showing the principle of the operation of the embodiment, and show a state in which the support release member has fallen. Hereinafter, portions corresponding to the above-described embodiment are denoted by the same reference numerals, and redundant description will be omitted.

In this embodiment, the winding shaft 23B
Support release members 239 and 240 that fall in the direction of the axis N are provided. In this case, as shown in FIG. 17, a pair of support release members 239 are provided on the upper and lower portions of the shaft main body 231.
240 is supported rotatably about the support shafts 239a and 240a. These support release members 239, 24
The tension coil spring 236 is stretched between 0, thereby allowing each support release member 239, 239,
The support member 239d and 240d are configured to protrude from the side of the shaft main body 231 when the support member 240 is raised.

As shown in FIG. 18, each support release member 23
In order to lock the side portions 9 and 240, the winding shaft 23B is provided with 230C so that each support release member 23
Reference numerals 9 and 240 denote withdrawing directions (arrows B and C) of the recording paper 7 shown in FIG. 20 from the upright state shown in FIG.
Only to fall.

When the recording paper 7 is wound in the present embodiment having such a configuration, as shown in FIG.
The support release members 239 and 240 stand upright, that is, the support portions 239d and 239d of the support release members 239 and 240
The recording paper 7 is wound up with 40 d protruding from the shaft main body 231.

In this state, when the recording paper 7 is grasped by hand and pulled in the direction of the tip of the shaft main body 231 (in the direction of arrow A), as shown in FIGS. Support release members 239, 2
40 falls down in the directions of arrows B and C.

As a result, the innermost recording paper 7a wound around the take-up shaft 230 is loosened from the outer peripheral surface 231d of the shaft main body 231. Then, the recording paper 7 can be pulled out from the winding shaft 23. From the flange 25, 1 / of the width of the recording paper 7
When the support release members 239 and 240 are located at positions less than or equal to 2, the support release members 239 and 24
When the outer periphery of the recording paper 7 that is orthogonal to the line connecting the zeros is sandwiched and pulled out from the winding shaft 230, the support release members 239,
40 may not fall. However, according to the present invention,
Since the support release members 239 and 240 are located at a position exceeding 1/2 of the width of the recording paper 7 from the flange 25 to which the side surface of the recording paper 7 is brought into contact, particularly at a position of 2/3 to 10/11, FIG. Since the recording paper 7 is wound up in a state where the vicinity of the flange 25 is narrowed as shown in FIG. 7, when the recording paper 7 is pulled in the direction of the arrow A, no matter where the wound recording paper 7 is held,
The support release member can be displaced more efficiently.

The other configuration, operation, and effect are the same as those of the above-described embodiment, and a detailed description thereof will be omitted.

FIG. 21 is a plan view of a fourth embodiment of the take-up shaft according to the present invention, and FIG. 22 is a plan view showing a main portion of the fourth embodiment of the take-up shaft according to the present invention. In the figure, the same reference numerals are given to portions corresponding to the above-described embodiment, and redundant description will be omitted.

As shown in FIG. 22, in the winding shaft 23C of the present embodiment, the support release member 239 is inclined by a predetermined angle with respect to the direction of the axis N in the third embodiment. It is configured as follows. Here, the support release members 239 and 240 are provided on the upper and lower portions of the shaft main body 231 in the same manner as in the third embodiment.
It is supported rotatably around 39a and 240a.

In the case of this embodiment, the support release member 23
As shown in FIG. 22, it is preferable that the angle θ between the shafts 9 and 240 be set so that the angle θ between the axis N and the rotation axis M of the support shafts 239a and 240a is about 45 degrees.

In the present embodiment having such a configuration, when the wound recording paper 7 is to be removed, the recording paper 7 is grasped by hand and lightly rotated in a direction opposite to the winding direction, or Tip direction of main body 231 (arrow A direction)
To pull it. As a result, the innermost recording paper 7a
The support release members 239 and 240 fall down due to an external force from the innermost recording paper 7 a wound around the winding shaft 231.
Is loosened from the outer peripheral surface 231d of the shaft main body 231 (see FIG. 19B), so that the recording paper 7 can be easily removed from the take-up shaft 23 as in the case of the above embodiment. it can. The other configuration and operation and effect are the same as those of the above-described embodiment, and thus detailed description thereof will be omitted.

FIGS. 23 to 26 show a fifth embodiment of the winding shaft according to the present invention. FIG. 23 is a partial sectional view of a main part of this embodiment viewed from the front. FIG.
FIG. 25 is a partial cross-sectional view of a main part of the embodiment viewed from a plane direction, and FIG. 25 is an explanatory view showing the principle of operation of the embodiment, showing a state in which the recording paper is wound around a winding shaft. 26
Is an explanatory view showing the principle of operation of the embodiment, and shows a state in which the support release member is folded down. Hereinafter, portions corresponding to the above-described embodiment are denoted by the same reference numerals,
A duplicate description will be omitted.

As shown in FIG. 23, in the take-up shaft 23D of the present embodiment, the upper and lower parts of the shaft main body 231 fall in the same direction as the third embodiment in the direction in which the recording paper 7 is removed. Support release members 239 and 240 are provided. The shaft body 231 and the pair of winding portions 23
A sleeve-shaped operating member 241 is fitted around a winding shaft portion 230 composed of
Holes 241a provided at positions corresponding to 39, 240
From the support portions 239d of the support release members 239 and 240,
240d is projected.

As shown in FIGS. 23 and 25, this operating member 241 has
a, and is configured to be slidable in the axial center N direction along guide portions 232a, 233a provided on the winding portions 232, 233. Also,
A locking projection 241b is formed on the inner peripheral surface of the operating member 241. As shown in FIG. 26, the locking projection 241b is engaged with the wall portion 231f of the locking groove 231e formed in the shaft main body 231. The operating member 241 does not come off the shaft main body 231.

When the recording paper 7 is wound in the present embodiment having such a configuration, as shown in FIG.
Support portions 239d, 240 of support release members 239, 240
The recording paper 7 is wound with d protruding from the operating member 241, whereby the recording paper 7 is released from the support release members 239 and 240.
Are wound around the operation member 241 while being supported by the support portions 239d and 240d.

In this state, as shown in FIG.
When the recording paper 7 is gripped by hand and pulled in the direction of the tip of the shaft main body 231 (in the direction of arrow A), the operating member 241 is moved by an external force from the innermost recording paper 7a. Each support release member 2
39 and 240 are tilted in the same direction by the movement of the recording paper 7a and the operation member 241. Further, the hole 24 of the operating member 241
The support release members 239 and 240 enter the inside of the operation member 241 by being pressed against the open end of 1a. As a result, the innermost recording paper 7a wrapped around the outer periphery of the operating member 241 is floated and loosened from the outer periphery of the operating member 241. Therefore, the recording paper 7a can be easily formed similarly to the above-described embodiment. From the winding shaft 23D.

In the case of the present embodiment, when the recording paper 7 is extracted, the operating member 241 moves together with the recording paper 7, so that not only the recording paper 7 but also the operating member 241 can be used for the support release members 239 and 240. External force acts. Therefore, the support release members 239 and 240 can be moved more smoothly to make the recording paper 7 loose, and the operability is further improved. The other configuration and operation and effect are the same as those of the above-described embodiment, and thus detailed description thereof will be omitted.

As described above, according to the above embodiment, a simple operation of rotating the recording paper 7 wound around the winding shaft 23 in the circumferential direction or pulling the recording paper 7 in the direction of the shaft center N is performed. The recording paper 7 can be easily pulled out from the take-up shaft 23 only by the above operation.

It should be noted that the present invention is not limited to the above-described embodiment, and various changes can be made. For example,
The above-mentioned sleeve-shaped operating member is not limited to the case where the support release member is inclined in the axial direction as in the fifth embodiment, but the support release member is inclined with respect to the circumferential direction of the winding shaft or the axis. It can also be used when falling down in a given direction.

In the above-described embodiment, the roll diameter of the recording paper is reduced by rotating and tilting the support release member. However, the present invention is not limited to this.
For example, the support release member may be slid by an external force for pulling out the recording paper.

Further, in the above-described embodiment, the type in which the winding shaft is cantilevered has been described as an example. However, the present invention is not limited to this, and the winding shaft is supported at both ends. Also, the present invention can be applied to a case where flanges are attached to both sides. However, the present invention is most effective when the winding shaft is cantilevered as in the above-described embodiment.

Furthermore, although the spring has been described using a coil spring, it may be a leaf spring.

Further, the present invention is applicable not only to a dot impact printer but also to various printers such as a thermal printer and an ink jet printer.

[0073]

As described above, according to the first aspect of the present invention, a flange portion for bringing the side surface of the recording medium into contact,
A winding shaft for winding the recording medium, a first position on the outer periphery of the winding shaft that protrudes from the outer periphery so as to be in contact with the recording medium, and an axial center of the winding shaft from the first position. And a support release means which is movable from the first position to the second position by a frictional force at the time of movement of the recording medium which is movable to the second position. From the flange portion toward the leading end of the winding shaft portion, the width of the recording medium is 1 /
Since the recording medium is provided at a position exceeding 2, the recording medium is constantly moved in the direction of the flange portion of the take-up shaft due to the tension generated in the recording medium, and is arranged on the flange portion and taken up. Further, when the recording medium wound around the winding shaft is simply moved in a predetermined direction, the support release means moves from the first position to the second position by an external force for removing the recording medium, and the winding shaft is moved. The diameter of the part becomes apparently smaller. As a result, the innermost recording medium wound around the take-up shaft portion floats from the outer periphery of the take-up shaft portion and becomes loose, so that the recording media can be easily wound in a roll without dislocation. The recording paper can be removed from the take-up shaft by a very simple operation.

According to the second aspect, the above effect can be achieved.

Therefore, according to the third aspect of the present invention, the recording paper is arranged on a winding shaft and wound, and the printed recording paper wound on the winding shaft is removed by a simple operation. This makes it possible to provide a printer with high operability when exchanging recording paper.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating an overall configuration of a printer according to an embodiment of the present invention.

FIG. 2 is a plan view of the printer of FIG.

FIG. 3 is a view (side view) in the direction of arrow B in FIG. 2;

FIG. 4 is a sectional view taken along line CC of FIG. 2;

FIG. 5 is a rear perspective view of the printer of FIG. 1;

FIG. 6 is a plan view showing the appearance of the winding shaft according to the first embodiment of the present invention.

FIG. 7 is a detailed plan view of the same embodiment.

FIG. 8 is a schematic diagram showing an internal configuration of the embodiment.

FIG. 9A is an explanatory diagram showing the principle of operation of the embodiment, and shows a state in which the recording paper is wound around a winding shaft. (B): Explanatory drawing showing the principle of operation of the embodiment, showing a state in which the support release member has fallen.

FIG. 10 is a configuration diagram showing the vicinity of a pressing member of the embodiment.

FIG. 11 is a front sectional view of the embodiment.

FIG. 12 is a detailed plan view showing the appearance of a winding shaft according to a second embodiment of the present invention.

FIG. 13 is a schematic diagram showing an internal configuration of the embodiment.

FIG. 14 is an explanatory diagram showing a principle of operation of the embodiment.

FIG. 15 is a plan view showing the appearance of a winding shaft according to a third embodiment of the present invention.

FIG. 16 is a front sectional view of the embodiment.

FIG. 17 is a front configuration diagram showing a main part of the embodiment.

FIG. 18 is a detailed plan view showing a main part configuration of the embodiment.

FIG. 19A is an explanatory diagram showing the principle of operation of the embodiment, and shows a state in which the recording paper is wound around a winding shaft. (B): Explanatory drawing showing the principle of operation of the embodiment, showing a state in which the support release member has fallen.

FIG. 20 is an explanatory diagram showing the principle of operation of the embodiment;
This shows a state in which the support release member has fallen.

FIG. 21 is a plan view of a winding shaft according to a fourth embodiment of the present invention.

FIG. 22 is a plan view showing a main part of the embodiment.

FIG. 23 is a partial sectional view of a main part of a winding shaft according to a fifth embodiment of the present invention as viewed from the front.

FIG. 24 is a partial cross-sectional view of a main part of the same embodiment as seen in a plane direction.

FIG. 25 is an explanatory diagram showing the principle of operation of the embodiment;
This shows a state in which the recording paper is wound on a winding shaft.

FIG. 26 is an explanatory view showing the principle of operation of the embodiment;
This shows a state in which the support release member has fallen.

FIG. 27 is a perspective view showing an overall configuration of an embodiment of a conventional printer.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Printer 3 Printer main body 5 Take-up mechanism 6 Print head 7, 8 Recording paper 10 Platen 11 Paper feed roller 12 Paper press roller 13 Paper feed means 23 Take-up shaft 25 Take-up flange 230 Take-up shaft part 231 Axis main body 232, 233 Winding part 234, 235 Support release member 236 Tension coil spring N Shaft core

Claims (3)

[Claims] 1. A winding shaft for winding a long recording medium, a flange portion for abutting a side surface of the recording medium, a winding shaft portion for winding the recording medium, and the winding shaft portion. A first position protruding from the outer periphery so as to be in contact with the recording medium on the outer periphery of the recording medium; and a second position closer to the axis of the winding shaft than the first position. And a support releasing means for moving the recording medium from the first position to the second position by a frictional force when the recording medium is moved. A take-up shaft provided at a position exceeding one half of the width of the medium. 2. The recording medium according to claim 1, wherein said support releasing means is provided at a position between 2/3 and 10/11 of a width of the recording medium from said flange portion toward a tip of said winding shaft portion. Winding shaft. 3. A printing means for printing on a recording medium mounted on an apparatus main body, a paper feeding means for sequentially feeding the recording medium printed by the printing means in a longitudinal direction thereof, and any one of claims 1 and 2. 2. A printer, comprising: the winding shaft according to claim 1; and a winding mechanism configured to wind the recording medium fed by the paper feeding means by the winding shaft.