JP2002205844A - Recording device - Google Patents

Abstract

(57) [Problem] To provide a recording apparatus capable of preventing a conveyance roller from falling off from an apparatus main body. SOLUTION: A pair of contactable / separable transport rollers 212, 2 for nipping a recording medium and sending it from a supply side to a recording side.
13 and one transport roller 213 to the other transport roller 2
And a prevention means 270 for preventing the other transport roller from falling off from the apparatus main body when separated from the apparatus main body 12. As a result, one of the transport rollers is in the release state,
Even if the other transport roller is in a free state, the other transport roller does not drop off from the apparatus main body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording apparatus for recording information on a recording medium, and more particularly to a recording apparatus in which a transport roller for transporting a recording medium is improved.

[0002]

2. Description of the Related Art In general, a large-size printer, which is one of the conventional recording apparatuses, has a structure in which a paper feeding unit, a printing unit, and a paper discharging unit are arranged in this order from the top and integrated. When using such a large-sized inkjet printer, for example, the user stores the recording medium, for example, roll paper in a paper feeding unit, pulls out the leading end of the roll paper, and pulls the leading end between the transport rollers, that is, the paper feed roller. And the driven roller.

[0003] Thus, the ink jet printer prints information on the roll paper by ejecting ink droplets from the nozzle openings of the print head while rotating the paper feed roller to feed the roll paper, and then prints the roll paper. It is designed to be discharged outside.

[0004]

Generally, the paper feed roller of a printer is coated with non-slip particles on its surface so that the roll paper does not slip when the roll paper is fed. Since the anti-slip particles are gradually removed according to the frequency of use of the printer, the user needs to periodically replace the paper feed roller. For this reason, usually, the paper feed roller is disposed so as to be easily detachable and attachable to the apparatus main body. For example, both ends of the paper feed roller are simply placed on bearings having openings.

However, since the driven roller is configured to be able to contact and separate from the paper feed roller, when the driven roller is in contact with the paper feed roller, the paper feed roller is pressed down. However, when the driven roller is separated from the paper feed roller, the paper feed roller may fall off the bearing.

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above problems, and an object of the present invention is to provide a recording apparatus capable of preventing a conveyance roller from dropping from an apparatus main body.

[0007]

According to a first aspect of the present invention, there is provided a recording apparatus for recording information on a recording medium, wherein the recording medium is sandwiched between a supply side and a recording side. A pair of transport rollers that can be brought into contact with and separated from each other, and a prevention unit that prevents one of the transport rollers from falling off from the apparatus main body when one of the transport rollers is separated from the other transport roller. It is characterized by having.

Thus, even if one of the transport rollers is in the release state and the other transport roller is in the free state, the other transport roller does not fall off from the apparatus main body, and the apparatus is damaged. Such a situation can be prevented.

According to a second aspect of the present invention, in the recording apparatus according to the first aspect, the prevention means is provided at one end of the other transport roller. Thus, the prevention means can be disposed without interfering with one of the transport rollers, the transport roller driving unit, and the like, and the space for disposing the prevention means can be minimized.

According to a third aspect of the present invention, in the recording apparatus according to the first or second aspect, the recording device is a roller that abuts on the other transport roller. Thereby, even if the prevention means is always in contact with the other transport roller, the prevention means also rotates following the rotation of the other transport roller, so that uneven wear and the like of both can be prevented.

[0011]

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

FIG. 1 is a perspective view showing an example of the configuration of an ink jet printer according to an embodiment of the present invention.
FIG. 2 is a perspective view showing an example of an internal configuration of a main part of the ink jet printer. The ink jet printer 100 shown in FIGS. 1 and 2 is a large-sized printer capable of printing up to relatively large-sized printing paper such as JIS standard A0 size or JIS standard B0 size.
10, a printing unit 120, a paper discharge unit 130, and a leg 140 are arranged in this order from the top. Printing unit 12
0 and the paper discharge unit 130 are integrated as a main body, and are configured to be separable from the paper supply unit 110 and the leg 140, respectively.

As shown in FIG. 1, the paper feeding section 110 is provided so as to protrude to the upper rear of the main bodies 120 and 130. As shown in FIG. 2, roll paper holders 111 on which two roll papers (print papers) can be set are provided diagonally up and down inside the paper supply unit 110.
As shown in FIGS. 1 and 2, a flip-up type openable and closable roll paper cover 112 is provided on the front of the roll paper holder 11.
1 so as to cover it.

As shown in FIG. 2, a roll paper holder 111 includes a spindle 113 for holding roll paper, and a paper feed unit 1.
10 attached to the inner surface of both side walls,
A pair of spindle receivers 114 that can be attached and detached and suspended,
115 is provided. After the roll paper is mounted in the center, both ends of the spindle 113
14 and 115, and are rotatably supported by a shaft. The roll paper cover 112 corresponds to FIGS.
As shown in FIG. 2, the upper part is rotatably supported, and is opened and closed by lifting or pressing down with the lower part.

As shown in FIG. 2, a printing unit 120 includes a carriage 122 on which a print head 121 is mounted, and a flexible flat cable (hereinafter referred to as F) connecting the print head 121 to a control unit (not shown) for executing printing.
An ink tube 124 for connecting the print head 121 to an ink cartridge (not shown) containing ink; a transport roller (not shown) for transporting the roll paper in the sub-scanning direction; Etc. are provided. And the printing unit 1
As shown in FIGS. 1 and 2,
An upper lid 125 and a front lid 126 are attached so as to cover the print head 121, the carriage 122, and the like.

The print head 121 includes a black ink print head for discharging black ink, and a plurality of color ink print heads for discharging ink of each color such as yellow, light cyan, cyan, light magenta, and magenta. ing. And print head 1
Reference numeral 21 denotes a pressure generating chamber and a nozzle opening connected to the pressure generating chamber. The ink is stored in the pressure generating chamber and pressurized at a predetermined pressure, whereby an ink droplet of a controlled size is directed from the nozzle opening toward the roll paper. Is discharged.

The carriage 122 is, as shown in FIG.
The carriage belt 128 is suspended from a rail 127 provided in the main scanning direction via a roller and connected to a carriage belt 128. When the carriage belt 128 is operated by a carriage driving device (not shown), the carriage belt 128 is moved.
, And is reciprocated by being guided by the rail 127.

The FFC 123 has one end connected to the connector of the control unit and the other end connected to the connector of the print head 121, and sends a print signal from the control unit to the print head 121. Ink tube 124
Are provided for ink of each color, and one end is connected to a corresponding ink cartridge of each color via an ink pressurizing supply unit (not shown), and the other end is connected to a print head 121 of each corresponding color. .

The ink tube 124 sends the ink of each color pressurized by the ink pressurizing and supplying means from the ink cartridge to the print head 121. The front lid 126, as shown in FIGS. 1 and 2,
The lower part is rotatably supported, and can be opened and closed by holding the upper part and pushing down or pushing up.

As shown in FIGS. 1 and 2, a paper discharge section 130 forms a part of a path for transporting roll paper in the sub-scanning direction, and a drawing for transporting roll paper in the sub-scanning direction. No paper ejection roller. Also, the paper discharge unit 13
As shown in FIGS. 1 and 2, a cartridge holder 150 for housing and holding an ink cartridge is disposed on the right side when viewed from the front side of the cartridge 0.

As shown in FIGS. 1 and 2, the leg 140 has two support columns 142 having rollers 141 for movement.
And a reinforcing rod 143 spanned between the support columns 142. The paper feed unit 110 and the main bodies 120 and 130 are placed on the support pillar 142 and fixed by screws.

In such a configuration, when the ink jet printer 100 is used, first, the paper feeding unit 11
Spindle 11 constituting roll paper holder 111 from 0
3 and take out the roll paper holder 113a inserted into the spindle 113 as shown in FIG.
13 Pull out from one end.

Then, as shown in FIG.
13 is inserted through one end of the shaft hole C of the roll paper R and penetrated therethrough, and as shown in FIG. 5, the one end of the shaft hole C of the roll paper R is inserted and fixed to the other end of the spindle 113. It is fitted into the paper holder 113b and brought into contact therewith. continue,
The roll paper holder 113a is inserted from one end of the spindle 113, and fitted into the other end of the shaft hole C of the roll paper R. This allows the roll paper R to rotate together with the spindle 113.

Next, as shown in FIG. 6, both ends of the spindle 113 into which the roll paper R is inserted are held obliquely with respect to the front-rear direction of the ink jet printer 100, that is, the roll paper R is inserted. Spindle 113
Is turned to the one spindle receiver 114.

Here, the spindle receiver 114 is configured to be rotatable in the horizontal direction.
Although the depressions 114a and 115a of the spindle receivers 114 and 115 that receive the end of the roll paper R face each other, when setting the spindle 113 into which the roll paper R is inserted,
As shown in FIG. 7, one spindle receiver 114 is rotated to make an angle of about 45 degrees with the other spindle receiver 115.

Thereafter, the other end of the spindle 113 into which the roll paper R is inserted is hung on the recess 114a of one of the spindle receivers 114, and the spindle 1 into which the roll paper R is inserted is placed.
13 and the spindle receiver 114 is rotated. The depression 114 of each spindle receiver 114, 115
a and 115 a are opposed to each other, and one end of the spindle 113 into which the roll paper R is inserted is placed in the other spindle receiver 115.
Over the hollow 115a. Thus, the spindle 113 into which the roll paper R has been inserted can be easily set on the paper feeding unit 110.

Next, as shown in FIG. 8, the leading end of the roll paper R is pulled out downward, and passed through the transport path of the printing unit 120.
Further, as shown in FIG. Then, as shown in FIG. 10, the roll paper R is rotated in the winding direction to position the leading end of the roll paper R at, for example, a marker M formed on the paper discharge guide 131.
Then, start the inkjet printer 100,
The print head 1 feeds the roll paper R in the sub-scanning direction.
The ink droplets are ejected while moving 21 in the main scanning direction, and predetermined information is printed on the roll paper R and discharged.

FIG. 11 is a schematic cross-sectional side view showing a conveying surface of roll paper including a conveying roller which is a characteristic part of the present invention, and FIG. 12 is a plan view showing the periphery of the conveying roller. From the paper feeding unit 110 to the paper discharging unit 130 via the printing unit 120
The paper transport path toward the printer is the inkjet printer 1
00 is inclined from the upper rear side to the lower front side.

This paper transport path is provided by a flat paper feed guide 21 provided from the paper feed section 110 to the print section 120.
1. a paper feed roller 212 and a driven roller 213, which are transfer rollers that can be brought into contact with and separated from each other, and a platen 214 that is a flat paper transfer guide unit that is disposed to face the print head 121 mounted on the carriage 122; A flat suction unit 215 provided from the printing unit 120 to the paper discharge unit 130, and a paper discharge guide 13 provided in the paper discharge unit 130
1.

Each surface of the paper feed guide 211 and the paper discharge guide 131 functions as a paper transport surface. The surface of the platen 214 functions as a sheet conveyance guide surface and also as a sheet suction surface. That is, as shown in FIG.
The platen 214 has a plurality of suction ports 214a arranged in parallel in the main scanning direction, and as shown in FIG.
The outside air is sucked from each suction port 214a by the fan 217 disposed inside the
4 to attract the roll paper conveyed on it.

Further, as shown in FIG.
A gap C is provided between the printing unit 120 and the suction unit 215, and as shown in FIG.
The outside air is sucked from the gap C by the
The roll paper conveyed above is attracted.

The surface of the suction section 215 functions as a paper transport surface and a paper suction surface. That is, as shown in FIG. 12, a plurality of suction units 215 are provided in parallel in the main scanning direction, and suction ports 215a, 215b, and 2 are provided in three rows in the sub-scanning direction.
15c, and as shown in FIG.
The outside air is sucked from each of the suction ports 215a, 215b, and 215c by a fan 217 provided in the inside of the suction unit 215, so that the roll paper conveyed on the suction unit 215 is sucked.

FIGS. 13A and 13B show the paper feed roller 2.
12A and 12B are a plan view and a side view illustrating a prevention unit for preventing the printer 12 from dropping from the printer main body. This prevention means 270
Has a roller 271 and a support arm 272.
The roller 271 is disposed so that its rotation axis is parallel to the rotation axis of the paper feed roller 212 and is in contact with one end of the paper feed roller 212. Support arm 272
Has one end rotatably supporting the roller 271 at one end,
The other end is fixed to the printer body.

According to the prevention means 270 having such a configuration, even if the paper feed roller 212 is in the free state by the driven roller 213 being in the release state, the roller 27
1 always presses down one end of the paper feed roller 212, so that the paper feed roller 212 does not fall out of the printer main body.
00 can be prevented from being damaged.

The roller 271 is a paper feed roller 212.
, And does not interfere with the driven roller 213, the conveying roller driving unit, and the like.
The arrangement space of 70 can be minimized. Further, even if the roller 271 is always in contact with the paper feed roller 212, the roller 271 also rotates following the rotation of the paper feed roller 212, so that uneven wear and the like of both can be prevented.

In the above-described embodiment, a printer has been described as an example. However, the present invention is not limited to this, and the present invention is also applicable to a device for recording on a recording medium, such as a facsimile device and a copying device.

[0037]

As described above, according to the recording apparatus of the present invention, even if one transport roller is in the release state and the other transport roller is in the free state, the other transport roller is moved from the apparatus main body. No more falling off. Therefore, it is possible to prevent a situation in which the device is damaged.

[Brief description of the drawings]

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

FIG. 2 is a perspective view showing an example of an internal configuration of a main part of the printer of FIG.

FIG. 3 is a first diagram illustrating a procedure for using the printer in FIG. 1;

FIG. 4 is a second diagram illustrating a procedure for using the printer in FIG. 1;

FIG. 5 is a third diagram illustrating a procedure for using the printer in FIG. 1;

FIG. 6 is a fourth diagram illustrating a procedure for using the printer in FIG. 1;

FIG. 7 is a fifth diagram illustrating the procedure for using the printer in FIG. 1;

FIG. 8 is a sixth diagram illustrating the procedure for using the printer in FIG. 1;

FIG. 9 is a seventh diagram illustrating the procedure for using the printer in FIG. 1;

FIG. 10 is an eighth diagram showing the procedure for using the printer in FIG. 1;

FIG. 11 is a schematic cross-sectional side view showing a transport surface of roll paper including a transport roller, which is a characteristic part of the present invention.

FIG. 12 is a plan view showing the periphery of a conveyance roller shown in FIG.

13A and 13B are a plan view and a side view showing a prevention means for preventing a paper feed roller constituting the transport roller of FIG. 12 from dropping from a printer main body.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 Printer 110 Paper feed unit 111 Roll paper holder 112 Roll paper cover 113 Spindle 114 Spindle receiver 115 Spindle receiver 120 Printing unit 121 Printhead 122 Carriage 123 FFC 124 Ink tube 125 Top lid 126 Front lid 127 Rail 128 Carriage belt 130 Paper discharge unit 131 Discharge guide 132 Side cover 140 Leg 141 Roller 142 Support column 143 Reinforcement rod 150 Cartridge holder 211 Paper feed guide 212 Paper feed roller 213 Follower roller 214 Platen 215 Suction unit 217 Fan 270 Prevention means 271 Roller 272 Support arm

Claims (3)

[Claims] 1. A recording apparatus for recording information on a recording medium, comprising: a pair of contactable / separable transport rollers for sandwiching the recording medium and sending it from a supply side to a recording side; A recording device comprising: a preventing unit configured to prevent the other transport roller from falling off from the apparatus main body when the transport roller is separated from the transport roller. 2. The recording apparatus according to claim 1, wherein said prevention means is provided at one end of said other transport roller. 3. The recording apparatus according to claim 1, wherein the prevention unit is a roller that comes into contact with the other transport roller.