JP2014144557A - Ink jet printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ink jet printer which can easily fit a recording medium regardless of a width of the recording medium.SOLUTION: An ink jet printer includes: a paper tube fixing part for fixing a paper tube around which a recording medium is wound; a standing part for rotatably supporting the paper tube fixing part; support shafts of two cylinders which are longer than the paper tube and placed along the direction orthogonal to a carrying direction of the recording medium; and a base bottom part placed at the root of the standing part. The base bottom part is provided with a first sliding part slidably supporting a through hole having as large a diameter as a cross section of one of the support shafts by the support shaft and a second sliding part slidably supporting a through hole that has a different shape from the cross section of the other support shaft by the support shaft. The holder can be moved along the support shafts according to a width of the paper tube. The two support shafts are provided with freely removable lifts raising/lowering rolls around which the recording media are wound.

Description

  The present invention relates to an inkjet printer that records an image on, for example, a relatively wide recording medium.

  2. Description of the Related Art Conventionally, ink jet printers that record characters and images by ejecting ink droplets onto a recording medium such as paper or vinyl chloride film are known. As the ink jet printer, there is a relatively large ink jet printer that performs recording on a relatively wide width in which the width orthogonal to the conveyance direction of the recording medium, that is, the width of the recording medium is about 1 m to 3 m, for example.

  This type of printer includes a recording unit that performs recording on a recording medium, and a transport unit that transports the recording medium recorded by the recording unit. The recording unit includes an inkjet recording head that ejects ink droplets onto a recording medium, and a head moving mechanism that scans the recording head in a width direction orthogonal to the conveyance direction of the recording medium. The transport unit includes a supply unit that supplies the recording medium from a supply roll around which the recording medium is wound, a platen that supports the recording medium recorded by the recording head, and the recording medium recorded by the recording head to the take-up roll. A take-up unit for winding.

  In the conventional printer configured as described above, the recording medium supplied from the supply roll of the supply unit is supported on the platen, and recording is performed by the recording head. The recording medium on which recording has been performed is wound on a winding roll of a winding unit. In such a printer, the width of the recording medium is not limited to a specific width, and various widths are used. Such various widths need to be able to be mounted on the supply unit and the winding unit. As an example of such an apparatus, there is an apparatus described in Japanese Patent Application Laid-Open No. 2010-168220, for example.

JP 2010-168220 A

  By the way, in a conventional printer, a roll shaft is inserted into a paper tube, and both ends of the roll shaft are rotatably supported. The roll axis is quite long because it can accommodate the maximum usable width. This is because the roll shaft must be used even when a narrow recording medium is used, and the long roll shaft is inconvenient to handle. In addition, it is necessary to arrange a roll-shaped recording medium based on one end of the roll shaft, and it is difficult to move the recording medium in the axial direction.

  Further, the roll around which the recording medium is wound is several tens of kilograms, and it is difficult to handle when the user works alone. For example, even when setting in the supply unit or removing from the take-up unit, it is necessary to lift a roll of several tens of kilograms and attach it to the holder, and it is difficult to set or remove it alone.

  The inkjet printer according to the present invention includes a supply unit that supplies the recording medium from a supply roll in which the recording medium is wound around a paper tube, a conveyance unit that conveys the recording medium, and the recording medium that is supplied from the supply unit. A recording head that performs recording on the recording medium, a winding unit that winds the recording medium recorded by the recording head around a winding roll, and the recording head that is mounted in a direction that intersects the conveyance direction of the recording medium. A carriage that moves; a platen that is disposed at a position facing the recording head and that supports the recording medium; and a recording medium that is disposed downstream of the platen in the transport direction and is recorded by the recording head. In an inkjet printer comprising a guide for heating and guiding the conveyance of the recording medium, at least the winding unit and the supply unit One of the holders includes two support shafts arranged along the intersecting direction, and a sliding portion on which the two support shafts are slidably arranged, and fixes the paper tube. And a receiver mounted on the two support shafts and mounted on the winding roll or the supply roll, and mounted on the two support shafts and mounted on the winding shaft. And a lift provided with lifting means for placing the take-up roll or the supply roll and moving the placed take-up roll or the supply roll up and down, the receiving device and the lift being the two It can be attached to and detached from the support shaft.

  It is possible to provide an ink jet printer that can easily mount recording media of various widths without using a roll shaft and can easily move the mounted recording media in the width direction.

FIG. 1 is an overall external view of an inkjet printer. FIG. 2 is a perspective view of the winding device. FIG. 3 is a side view of the roll receiver. 4A, 4B, and 4C are diagrams for explaining the operation of the roll lift unit. FIG. 5 is a diagram illustrating a state in which a roll is attached to the holder. FIGS. 6A, 6B, 6C, and 6D are views for explaining the operation of attaching the roll to the holder. FIG. 7 is a diagram illustrating the position of the recording medium.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an overall external view of an inkjet printer.
In the inkjet printer 1, for example, a relatively wide paper having a width dimension orthogonal to the transport direction of about 3 m or a synthetic resin film such as a vinyl chloride resin or a PET resin is used as a recording medium. The carriage 3 mounts an ink jet head as a recording head and reciprocates along the Y rail 4. The inkjet head ejects ink onto a recording medium conveyed on the platen 2 while reciprocating, and records an image. A transport roller 5 is disposed along the platen 2 upstream of the platen 2 in the transport direction of the recording medium. The recording medium is conveyed by the conveyance roller 5. The recorded recording medium is conveyed along the paper guide 6. The paper guide 6 is provided with a heater, and the fixing of ink is promoted by heating the recording medium after recording.

  The ink jet printer 1 includes a winding device 16 that winds a recorded recording medium. A shaft 14 and a shaft 15 are arranged in parallel in the width direction of the inkjet printer 1. A leg for supporting the main body is provided on the lower side of the inkjet printer 1, and a rail 8 is provided on the leg. A table on which the shaft 14 and the shaft 15 are fixed moves along the rail 8. The table is equipped with casters 7 and rolls on the ground.

  The shaft 14 and the shaft 15 are provided with a holder 10 and a holder 11 so as to be slidable in the longitudinal direction of the shaft. The holder 10 is provided with a motor 9 as a power source for winding the recording medium. Further, a roll receiver 12 and a lift 13 for temporarily placing the recording medium are detachably provided. The roll receiver 12 and the lift 13 are used when the recording medium is attached to or detached from the holder 10 and the holder 11. Further, by disposing the roll receiver 12 between the two shafts 14 and 15, the paper tube and the wound recording medium are not accidentally dropped down, so that damage due to dropping can be prevented.

  FIG. 2 is a perspective view of the winding device. The holder 10 of the winding device 16 includes a connector 19 that is a paper tube fixing portion that is inserted into the paper tube and fixes the paper tube. The connector 19 is rotatably supported above the main body of the holder 10 and rotates according to the rotation of the motor 9. The holder 11 of the winding device 16 includes a connector 18 that is inserted into a paper tube and fixed. The connector 18 is rotatably supported. The winding device 16 is attached to the inkjet printer 1. A connector 18 and a connector 19 are fixed to both ends of the paper tube. By rotating the motor 9, the paper tube is rotated to wind up the recording medium.

  Although not shown, a similar device can be used on the paper feed side of the inkjet printer 1. In that case, a roll in which a recording medium is wound around a paper tube is used. The paper tube of the roll is fixed to the connector 18 and the connector 19. When rotating in the direction in which the recording medium is pulled out, it can be freely rotated, and the recording medium is wound by the motor 9 in the reverse direction. For example, the roll is configured to rotate according to the rotation of the motor 9 only in the winding direction using a one-way clutch. The recording medium is supplied from the roll to the ink jet printer 1 to record an image, and the recording medium after recording is wound up by the winding device 16. The holder 11 is supported by the sliding portion 17 so that the shaft 14 can slide. The holder 10 is similarly provided with a sliding portion.

  FIG. 3 is a side view of the roll receiver. The roll receiver 12 is used by being placed on the shaft 14 and the shaft 15. The roll receiver 12 is provided with a bending portion 23 and a flange portion 24 at the lower portion of the roll receiver 12 so that the roll receiver 12 does not move in a direction crossing the axis when placed on the shaft 14. It mounts so that the axis | shaft 14 may enter between the bending part 23 and the collar part 24. FIG. A first cushion 20, a second cushion 21, and a third cushion 22 are provided on the upper portion of the roll receiver 12. The second cushion 21 and the third cushion 22 are provided with a tapered portion. By arranging the first cushion 20 in the center and the second cushion 21 and the third cushion 22 at the end, the roll is prevented from falling down when the roll is placed.

  4A, 4B, and 4C are diagrams for explaining the lift operation. The lift 13 is used by being placed on the shaft 14 and the shaft 15. The lift 13 is provided with a bent portion 33 and a flange portion 34 at the lower portion of the lift 13 so that the lift 13 does not move in a direction crossing the shaft when placed on the shaft 14. It mounts so that the axis | shaft 14 may enter between the bending part 33 and the collar part 34. FIG. A lift portion is provided on the upper portion of the lift 13. The shaft 32 is rotated by rotating the handle 31. The shaft 32 is threaded and rotated, whereby the angles of the joint portions 29 and 30 change and the height can be varied. Furthermore, there is a roll mounting part at the upper part, and a bottom part 27, a first oblique part 26, and a second oblique part 28 are provided. The roll placement unit moves up and down by the rotation of the handle. Further, when the roll is placed on the roll placement portion, the first inclined portion 26 and the second inclined portion 28 prevent the roll from falling down.

  FIG. 4A shows a state where the roll placement unit is located at the lowered position. FIG. 4B shows a state where the roll placing unit is located in the middle. FIG. 4C shows a state where the roll placement unit is located at an elevated position. The roll placement unit moves up and down by rotating the handle 31, and stops on the spot by stopping the handle. The direction of raising and lowering is based on the direction of rotation of the handle 31.

  FIG. 5 is a diagram illustrating a state in which a roll is attached to the holder. The connector 18 of the holder 11 is bitten and fixed to the paper tube of the roll 35. A connector 18 is rotatably provided on the upper portion of the main body 36 of the holder 11. The main body portion 36 includes a base portion and a standing portion, the standing portion includes a connector 18, and the base portion includes a sliding portion 17 and a fixing screw 37.

  The sliding portion 17 has a cylindrical shape and is fitted on the shaft 14 so as to be slidable. The inner diameter of the sliding portion 17 is substantially equal to the diameter of the shaft 14 and slides without a gap. Further, a sliding portion is provided on the shaft 15 side of the base portion, and is fitted to the shaft 15 so as to be slidable. The sliding portion on the shaft 15 side has an inner diameter that is about 2% to 10% thicker than the diameter of the shaft 15. The sliding portion on the shaft 15 side may be rectangular. By providing such a difference, the holder 11 can be smoothly slid without being hung. That is, if there is a gap between both sliding portions, the sliding portion may be inclined and hung with respect to the moving direction. Moreover, if there is no gap between the two, there is a possibility that the movement becomes impossible due to some bending of the shaft. It is important to move smoothly when attaching or detaching a roll, which will be described later. Moreover, the structure of this sliding part is provided with the same structure also on the holder 10 side. The sliding portion can be made slippery by being made of a resin containing fluorine.

  FIGS. 6A, 6B, 6C, and 6D are views for explaining the operation of attaching the roll to the holder. The following also shows a method for attaching or removing the roll of the recording medium of the supply unit or the winding unit of the ink jet printer 1 to the holder 10 and the holder 11.

First, as shown in FIG. 6A, the roll receiver 12 and the lift 13 are placed on the shaft 14 and the shaft 15, and the roll 35 is placed thereon.
Next, as shown in FIG. 6B, the lift 13 is raised to a height at which the paper tube is fitted into the connector 19. Then, the holder 10 is moved to fit the connector 19 into the paper tube. At this time, since the roll receiver 12 is provided, the inclination of the roll 35 becomes gentle, and the connector 19 can be inserted to the back of the paper tube. Lift 13 is lowered. It is preferable that the holder 10 slides smoothly.

Next, as shown in FIG. 6C, the lift 13 is moved to the holder 11 side. At this time, the lift 13 is preferably set on the holder 11 side from the center.
Next, as shown in FIG. 6D, the lift 13 is raised to a height at which the paper tube is fitted into the connector 18. Then, the holder 11 is moved to fit the connector 18 into the paper tube. Then the lift 13 is lowered. It is preferable that the holder 11 slides smoothly.

  Next, one of the holder 10 and the holder 11 is fixed to the shaft 14 and the unfixed side is moved so that the paper tube is bitten more firmly. After that, the opposite side is also eaten firmly into the paper tube. It is preferable that the holder 10 or the holder 11 slide smoothly. If there is a problem such as slanting or hanging on the shaft, the holder 10 or the holder 11 may not be eaten strongly.

Next, the fixation with the shaft is released, and the roll 35 is moved together with the holder 10 and the holder 11 to a desired position.
When removing the roll 35, the reverse process is performed. By using the roll receiver 12, the inclination of the roll can be reduced, and can be easily fitted and pulled out. Further, if one set of the roll receiver 12 and the lift 13 is used, it can be used for setting a roll on the paper feeding side in addition to the winding device 16.

  FIG. 7 is a diagram illustrating the position of the recording medium. The winding device 16 is movably attached to the inkjet printer 1. During printing, the roll 35 is disposed under the paper guide 6. When the roll 35 is removed or when the winding device 16 is operated such as when a paper tube is attached, the roll 35 is pulled out. The case of drawing out is shown by a dotted line. The caster 7 and the rail 8 can be easily pulled out or pushed in. During printing, the recording medium 38 coming out of the paper guide 6 is slackened and wound on the roll 35 while increasing the time for drying the ink.

  The present invention can be used for an ink jet printer.

DESCRIPTION OF SYMBOLS 1 Inkjet printer 2 Platen 3 Carriage 4 Y rail 5 Conveyance roller 6 Paper guide 10 Holder 11 Holder 12 Roll receiver 13 Lift 14 Shaft 15 Shaft 16 Winding device 18 Connector 19 Connector

Claims (4)

A supply unit for supplying the recording medium from a supply roll in which the recording medium is wound around a paper tube;
Conveying means for conveying the recording medium;
A recording head for recording on the recording medium supplied from the supply unit;
A winding unit for winding the recording medium recorded by the recording head onto a winding roll;
A carriage mounted with the recording head and moving in a direction intersecting the conveyance direction of the recording medium;
A platen disposed at a position facing the recording head and supporting the recording medium;
In an inkjet printer comprising: a guide that is disposed on the downstream side of the platen in the conveyance direction and that heats the recording medium recorded by the recording head and guides conveyance of the recording medium.
At least one of the winding unit and the supply unit is
Two support shafts arranged along the intersecting direction;
A pair of holders having a sliding portion in which the two support shafts are slidably disposed and fixing the paper tube;
A receiving device that is placed on the two support shafts and placed on the take-up roll or the supply roll;
Elevating means mounted on the two support shafts, mounted, mounted on the winding roll or the supply roll, and moved up and down on the mounted winding roll or the supply roll. A lift, and
An ink jet printer, wherein the receiving member and the lift are detachable from the two support shafts. The pair of holders is
On the upper part of the main body of each of the holders, a paper tube fixing portion that is rotatably supported and fixes the paper tube,
A fixing means provided at a lower portion of the main body portion of each of the holders, and fixing to at least one of the two support shafts;
The lower portion of the main body portion of each of the holders is provided with the sliding portion, and the sliding portion has at least an inner circumference having the same shape as the outer diameter of one of the two support shafts. A first sliding portion that is slidably attached to the one support shaft, and an inner peripheral portion having a different shape from the outer diameter of the other support shaft of the two support shafts. A second sliding portion slidably attached to the other support shaft;
Have
2. The ink jet printer according to claim 1, wherein each of the holders slides on the two support shafts and is fixed by the fixing means at an arbitrary position of the two support shafts.   The elevating means includes a handle and a screw portion that interlocks with the rotation of the handle. When the handle is rotated in one direction, the winding roll or the supply roll is lowered, and when the handle is rotated in the other direction, The inkjet printer according to claim 1, wherein the winding roll or the supply roll is raised. A leg part connected to the lower side of the ink jet printer; and a rail for guiding the winding part to the leg part,
By sliding the winding portion on the rail, the winding portion can be placed under the guide, and the winding portion can be pulled out from below the guide.
The inkjet printer according to any one of claims 1 to 3, wherein when the recording is performed on the recording medium, the winding unit is disposed below the guide. .

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