JPH05177828A - Ink-jet recorder - Google Patents

Abstract

PURPOSE:To reduce a man-hour necessary for setting of rolled paper. CONSTITUTION:A driving roller 5 and driven roller 6 supporting one side of a circumferential surface of rolled paper are provided under a state running parallel with each other on a pair of side plates 1 facing on each other, one end of a supporting plate 8a is fitted to the side plate 1 turnably and a stopper 12 regulating at least fixed turning in the direction separating from the side plate 1 and a bearing piece 13 bearing the stopper 12 are provided respectively in a projecting state. Then a supporting plate 8b is connected turnably with the other end of the supporting plate 8a by a connecting pin 9, which is energized toward the side plate 1 by a kick spring 10 and contacted with the circumferential surface of the other side of the rolled paper 7 at the tip of the supporting plate 8b, a movable supporting roller 11 pressurizing and supporting the rolled paper 7 by bounce of the kick spring 10 is provided and a recording head 4 is provided between the driving roller 5 and driven roller 6 so that the recording head 4 is reciprocated along those.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink jet recording apparatus such as an ink jet printer which prints characters, figures and the like on paper by ejecting ink from minute nozzles of a recording head.

[0002]

2. Description of the Related Art In the above ink jet recording apparatus,
As the roll paper is used as the recording medium, for example, a roll paper setting mechanism is provided, and a platen roller for sequentially feeding the roll paper feeding portion is provided, and the roll paper is provided in the opposite direction to the peripheral surface of the platen roller. It is known that a recording head that reciprocates in the axial direction is arranged. The recording on the roll paper is performed by aligning the feeding portion of the roll paper with the peripheral surface of the platen roller, and recording characters, figures, and the like on the portion by the recording head.

An ink jet recording apparatus disclosed in Japanese Patent Application Laid-Open No. 2-41279 is also known. This ink jet recording apparatus is provided with a support shaft which is inserted into a support hole provided at the center of the roll paper and supports the roll paper, and the support shaft is opposed to the peripheral surface of the support shaft in the axial direction thereof. A recording head that reciprocates is disposed in the. And, in order to maintain a constant distance between the recording head and the peripheral surface of the roll paper supported by the support shaft, gap members supporting both ends of the peripheral surface of the roll paper facing the recording head are Attached to both ends of a carriage stay that slidably supports the recording head, and the support shaft is slidable toward the recording head.
It is biased toward the recording head by a spring.

In this ink jet recording apparatus, a support shaft is inserted into a support hole of the roll paper, the roll paper is set via the support shaft, and both ends of the peripheral surface of the roll paper are supported by gap members. Then, recording is performed on the outer peripheral surface of the roll paper by a recording head.

[0005]

The conventional ink jet recording apparatuses described above do not have any particular problem in recording on the roll paper, but the former ink jet recording apparatus feeds the roll paper and applies it to the platen roller. The recording head records on the aligned sheets. Therefore, there is a problem that the recording apparatus becomes large in size because a space for arranging the platen roller and a roll paper is required.

Further, the latter ink jet recording apparatus disclosed in the above-mentioned Japanese Patent Laid-Open Publication is for recording with a recording head on the peripheral surface of roll paper, and does not require a platen roller, so that the recording apparatus is miniaturized. Suitable for that. However, it is necessary to separate the support shaft, insert it into the support hole of the roll paper, and attach the support shaft together with the roll paper. Therefore, there is a problem that much labor is required for setting the roll paper.

The present invention solves the above-mentioned problems in an ink jet recording apparatus for recording on the peripheral surface of roll paper, and provides an ink jet recording apparatus capable of reducing the labor required for setting roll paper. The purpose is to

[0008]

According to the ink jet recording apparatus of the present invention, recording is performed by the recording head on the peripheral surface of a roll paper which is arranged so as to face the recording head in the same direction as its moving direction. In an inkjet recording apparatus that is performed, a pair of roll-shaped support members that support the peripheral surface of the roll paper facing the recording head on both sides of the roll paper in the circumferential direction of the roll paper have their axes aligned with the axis of the roll paper. A roll-shaped movable support member that is rotatably arranged in a direction parallel to the roll paper, and that supports the peripheral surface of the roll paper on the side opposite to the recording head, makes its axis parallel to the axis of the roll paper and It is characterized in that it is provided so as to be movable in a direction away from or close to the head, and that its movable support member is biased toward the recording head by a spring.

Each of the pair of supporting members and the movable supporting member is provided over the length of the roll paper, or a plurality of roll papers shorter than the length of the roll paper are arranged at intervals so that the roll paper is It can be configured so that it can be supported. In addition, the movable support member is arranged in the circumferential direction of the roll paper.
It may be provided so that it can be supported at a plurality of locations or at a plurality of locations in the circumferential direction so as to be supported.

[0010]

In the setting of the roll paper in the ink jet recording apparatus of the present invention, the movable supporting member is moved in the direction away from the recording head against the force of the spring, and the movable supporting member and a pair of supporting members. The roll paper is inserted between the pair of support members, and a part of the peripheral surface of the roll paper is fitted between the pair of support members so that one side of the peripheral surface of the roll paper is supported by the pair of support members. Then, the movable support member is brought into contact with the other side of the peripheral surface of the roll paper, and the movable support member is pressed against the roll paper by the force of the spring, so that the roll paper is sandwiched between the pair of support members and the movable support member. To support. The separation of the roll paper set in this way is performed after the movable support member is moved against the force of the spring to release the roll paper.

[0011]

EXAMPLE A first example of the ink jet recording apparatus of the present invention will be described with reference to FIGS.

1 and 2, reference numeral 1 denotes a pair of side plates opposed to each other in a cover or the like, and a pair of carriage stays 2a and 2b are provided in a erected manner in parallel with each other. A carriage 3 is slidably attached to the carriage stays 2a and 2b, and a recording head 4 for ejecting ink from nozzles (not shown) is attached to the carriage. The carriage 3 is attached to a driving means (not shown) such as an endless belt, and the recording head 4 is reciprocated together with the carriage 3 along the carriage stays 2a and 2b.

Reference numeral 5 is a drive roller as a support member, 6 is a driven roller as a support member, and the axes of the drive roller 5 and the driven roller 6 are the carriage stay 2
The recording head 4 is mounted on the pair of side plates 1 so as to be parallel to the axes of a and 2b and positioned on both sides of the recording head 4 on the nozzle side. The gap between the drive roller 5 and the driven roller 6 allows a part of the peripheral surface of the roll paper 7 to be fitted between them so as to support one peripheral surface of the roll paper 7. It is set.

Reference numerals 8a and 8b are support plates, and their respective ends are connected to each other by connecting pins 9 so as to be rotatable. Reference numeral 10 is a kick spring for urging each of the support plates 8a and 8b in a direction in which they are close to each other, and a ring portion thereof is attached to the connecting pin 9 and each end portion thereof is attached to each of the support plates 8a and 8b. It is fixed. The support plates 8a and 8b are supported by the support plates 8a and 8b so that the side of the support plates 8a and 8b biased by the kick spring 10 faces the recording head 4.
The end of 8a is rotatably attached between the lower ends of the pair of side plates 1. Reference numeral 11 denotes a movable support roller as a movable support member that is rotatably attached to the tip of the support plate 8b in parallel with the drive roller 5, and is a roll paper supported by the drive roller 5 and the driven roller 6 by this. It is configured to be able to support the other side peripheral surface of 7. Reference numeral 12 denotes a stopper provided at the end of the support plate 8a, and when the support plate 8a is rotated in the direction of separating from the side plate 1, the stopper is engaged with a support piece 13 provided at the side plate 1 so as to project. The support plate 8a is configured to maintain a substantially horizontal state.

Numeral 14 is a hook having an intermediate portion in the lengthwise direction axially attached to the support plate 8a. This hook is formed by fitting the support plates 8a and 8b between a pair of side plates 1 as shown by a chain line in FIG. In this case, the support plate 8a is fixed by being locked to the supporting piece 13 and is biased by a spring (not shown) in the direction of locking to the supporting piece 13. When the hook 14 locked to the support piece 13 is separated, the end portion protruding from the support plate 8a is operated and rotated. As described above, when the support plates 8a, 8b are fitted between the pair of side plates 1 as described above, the protrusions 15 are provided on the side plate 1 to support the movable support roller 11 against the force of the kick spring 10. It is a receiving material set up.

To set the roll paper 7 for the ink jet recording apparatus constructed as described above, the hook 14 is separated from the support piece 13, and the support plates 8a and 8b are attached to the side plates as shown by the solid line in FIG. Rotate in the direction of separating from 1. Then, the stopper 12 of the support plate 8a is locked to the support piece 13,
Since the support plate 8a stops and maintains its state, the support plate 8b is rotated in the direction of separating from the side plate 1 against the force of the kick spring 10, and the driving roller 5, the driven roller 6 and the movable support roller are rotated. Insert the roll paper 7 between 11 and 11. Then, a part of the peripheral surface of the roll paper 7 is driven by the driving roller 5 and the driven roller 6.
And the movable support roller 11 is pressed against the other side peripheral surface of the roll paper 7 by the force of the kick spring 10 via the support plate 8b,
The drive roller 5, the driven roller 6, and the movable support roller 11 support the roll paper 7 in a sandwiched manner.

In order to feed the roll paper 7 supported as described above, when it is rotated, the drive roller 5 is driven. Then, since the roll paper 7 is in pressure contact with the drive roller 5, the roll paper 7 also rotates at the same time, and the feeding of the roll paper 7 proceeds. For example, every time the recording by the forward movement of the recording head 4 is completed, the roll paper 7 is rotated by the drive of the drive roller 5, and the roll paper 7 is fed out by a required length repeatedly. In this way, when the roll paper 7 is repeatedly fed out and the winding amount of the roll paper 7 decreases and the diameter changes, the force of the kick spring 10 correspondingly moves with the support plate 8b and the movable support roller. 11 moves to maintain the pressed state of the roll paper 7 against the drive roller 5 and the driven roller 6. The supported roll paper 7 is separated while the support plate 8b is rotated against the elasticity of the kick spring 10 to release the roll paper 7 from the movable support roller 11. Support plate when not in use 8
a and 8b rotate the support plates 8a and 8b toward the side plate 1 as shown by the chain line in FIG. 1 to engage the hooks 14 with the support pieces 13 to fix the support plate 8a, and The support plate 8b is rotated against the elastic force of the kick spring 10 so that the movable support roller 11 receives the material 15
Abut and support.

A stopper projecting from the end of the support plate 8a
12 and the support piece 13 protruding from the side plate 1,
It is also possible to urge the support plate 8a attached to the side plate 1 toward the side plate 1 with a spring.

FIGS. 3 to 4 show the second embodiment. Even when the roll paper 7 has a large winding amount and the amount of change in diameter when the feeding is continued is large, the roll paper is large. 7
It is possible to normally perform recording with the ink ejected from the recording head 4 on the peripheral surface of the.

In FIGS. 3 and 4, reference numeral 18 denotes a pair of swing members whose intermediate portions are rotatably attached to both ends of a carriage stay 2a which is attached to a pair of side plates 1.
The carriage stay 2b is attached to these in a erected manner. The carriage 3 is slidably attached to the carriage stays 2a and 2b, and the recording head 4 is attached to the carriage 3. Therefore, when the swing member 18 swings, the carriage stay 2b, the carriage 3, and the recording head 4 swing around the carriage stay 2a as a fulcrum. 19 supports the outer peripheral surface facing the recording head 4 at each axial end of the roll paper 7, and keeps the gap between the peripheral surface of the roll paper 7 and the nozzles (not shown) of the recording head constant. In order to do so, spacers (see FIG. 4) projectingly provided on the end of the swing member 18 are provided around the roll paper 7 which is supported by the drive roller 5, the driven roller 6 and the movable support roller 11 in a sandwiched manner. An urging spring that urges the swing member 18 to press the spacer 19 against the surface. The other structure is the same as that of the first embodiment, and therefore the same reference numerals are given. The spring constant of the urging spring 20 is set smaller than that of the kick spring 10 for urging the support plates 8a, 8b connected by the connecting pin 9, so that the rolls for the driving roller 5 and the driven roller 6 are rolled. The pressure contact state of the paper 7 can be maintained.

The setting of the roll paper 7 for the ink jet recording apparatus of the second embodiment is the same as that of the first embodiment, and the roll paper 7 is supported as shown by the solid line in FIG. Then, as described above, the recording head 4, together with the swing member 18 and the like, uses the carriage stay 2a as a fulcrum,
A swing member that can swing toward the roll paper 7
Since a spacer 19 is provided on the protrusion 18 and the spacer 19 is pressed against the peripheral surface of the end portion of the roll paper 7 supported by the driving roller 5 and the driven roller 6, the spacer 19 is supported by the roll paper 7. The recording head 4 and the swing member 18 are stopped, and further swings are impossible. That is, since the roll paper 7 supports the recording head 4 via the spacer 19 and the swing member 18, the distance between the nozzle of the recording head 4 and the outer peripheral surface of the roll paper 7 is kept constant.

As described above, the roll paper 7 supported in the state shown by the solid line in FIG. 3 is fed out by the rotation of the drive roller 5 to reduce the winding amount of the roll paper 7 and reduce its diameter. The smaller the value of changes, the more the support state of the roll paper 7 by the drive roller 5 and the driven roller 6 changes. For example, when the roll paper 7 shown by the solid line in FIG. 3 has a smaller diameter than the roll paper 7 shown by the chain line, it enters deeper between the drive roller 5 and the driven roller 6 than the case of the solid line, and the recording head It will be in the state of moving to 4. However, in accordance with the movement of the roll paper 7, the roll paper 7 swings the swing member 18 via the spacer 19 and the carriage stay 2b
At the same time, since the recording head 4 is moved as shown by the chain line, the distance between the recording head 4 and the outer peripheral surface of the roll paper 7 does not change. Therefore, the recording head 4 can always perform recording on the outer peripheral surface of the roll paper 7 in a normal state regardless of the change in the diameter due to the decrease in the winding amount of the roll paper 7.

FIG. 5 shows a third embodiment in which a plurality of movable supporting members are provided. In FIG. 5, 21a and 21b are long on the nozzle (not shown) side of the recording head 4 at the end of the pair of side plates 1 in the same direction as the direction in which the drive roller 5 and the driven roller 6 press the roll paper 7. With the formed long holes, the respective end portions are slidably inserted into the long holes 21a, 21b, the support rods 22a, 22b are provided in an erected state between the pair of side plates 1, and the support rods 22a, 22b are also provided. Movable support rollers 11a, 11
b is installed. Reference numeral 23 is a connecting member that is attached to the supporting rods 22a and 22b in an erected manner, and 24 is a spring that biases the supporting rods 22a and 22b and the movable supporting rollers 11a and 11b toward the recording head 4 via the connecting member 23. is there. The other structure is the same as that of the first embodiment, and therefore the same reference numerals are given.

The roll paper 7 is set in this ink jet recording apparatus against the force of the spring 24 so that the support rod 22
a, 22b and the movable supporting rollers 11a, 11b are moved along the long holes 21a, 21b in a direction away from the recording head 4 to roll between the driving roller 5, the driven roller 6 and the supporting rollers 11a, 11b. Insert the paper 7. Then, with the peripheral surface of the roll paper 7 in contact with the driving roller 5 and the driven roller 6, the support rods 22a and 22b and the movable support rollers 11a and 11b are released, and the movable support roller 11a is elastically moved by the spring 24b. , 11b are pressed against the peripheral surface of the roll paper 7 to support the roll paper 7. Then, as the diameter of the roll paper 7 changes smaller, the support rods 22a,
22b slides along the long holes 21a, 21b to always support the roll paper 7.

[0025]

As described above, the ink jet recording apparatus of the present invention records on the peripheral surface of the roll paper, so that it can be made compact. The roll paper is supported by a pair of roll-shaped support members arranged in parallel and a roll-shaped movable support member biased by a spring in the direction of these support members in a sandwiched manner. .. Therefore, since the roll paper is set only by moving the movable support member against the elastic force of the spring, the roll paper can be easily set.

[Brief description of drawings]

FIG. 1 is a side sectional view of a first embodiment.

FIG. 2 is a partial plan view of the first embodiment.

FIG. 3 is a side sectional view of a second embodiment.

FIG. 4 is a partial plan view of the second embodiment.

FIG. 5 is a side sectional view of a third embodiment.

[Explanation of symbols]

4 ... recording head, 5 ... drive roller, 6 ... driven roller, 7
... Roll paper, 8a, 8b ... Support plate, 10 ... Kick spring, 11 ... Movable support roller.

Front Page Continuation (72) Inventor Tatsuya Kikumura 1-2-2 Tamatsukuri, Chuo-ku, Osaka City, Osaka Prefecture Mita Kogyo Co., Ltd. (72) Kenichi Satake 1-2-2 Tamatsukuri, Chuo-ku, Osaka City, Osaka Mita Industry Co., Ltd.

Claims (1)

[Claims] 1. In an ink jet recording apparatus in which recording is performed by the recording head on the peripheral surface of the roll paper, which is arranged in the same direction as the moving direction of the recording head, the axis of the roll paper is the same direction. On both sides of the recording head in the direction
A pair of roll-shaped support members that support the peripheral surface of the roll paper recording head are rotatably arranged with their axes parallel to the roll paper axis, and are opposite to the roll paper recording head. A roll-shaped movable supporting member that supports the peripheral surface on the side is provided such that its axis is parallel to the axis of the roll paper and is movable in a direction far from or near the recording head, and the movable supporting member is An ink jet recording apparatus characterized in that a recording head is biased by a spring.