This patent application is based on and claims priority pursuant to 35 U.S.C. § 119(a) to Japanese Patent Application No. 2022-155224, filed on Sep. 28, 2022, in the Japan Patent Office, the entire disclosure of which is hereby incorporated by reference herein.
Embodiments of the present disclosure relate to a liquid discharge apparatus.
In the related art, a liquid discharge apparatus discharges ink as a liquid onto a recording medium to form an image on the recording medium. The liquid discharge apparatus may include an opening-and-closing member which is slidable to expose and cover an interior of the liquid discharge apparatus.
Embodiments of the present disclosure describe an improved liquid discharge apparatus that includes a liquid discharge head, a stage, a guide rail, and an opening-and-closing cover. The liquid discharge head discharges a liquid to a recording medium. The stage moves in a vertical direction to move the recording medium on the stage. The guide rail holds the stage. The stage is movable in a conveyance direction intersecting the vertical direction. The opening-and-closing cover is slidable in one of the conveyance direction and a main scanning direction intersecting both the conveyance direction and the vertical direction. The opening-and-closing cover includes a retraction portion retractable above the stage.
A more complete appreciation of the disclosure and many of the attendant advantages and features thereof can be readily obtained and understood from the following detailed description with reference to the accompanying drawings, wherein:
The accompanying drawings are intended to depict embodiments of the present invention and should not be interpreted to limit the scope thereof. The accompanying drawings are not to be considered as drawn to scale unless explicitly noted. Also, identical or similar reference numerals designate identical or similar components throughout the several views.
In describing embodiments illustrated in the drawings, specific terminology is employed for the sake of clarity. However, the disclosure of this specification is not intended to be limited to the specific terminology so selected and it is to be understood that each specific element includes all technical equivalents that have a similar function, operate in a similar manner, and achieve a similar result.
Referring now to the drawings, embodiments of the present disclosure are described below. As used herein, the singular forms “a,” “an,” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise.
Embodiments of the present disclosure are described below with reference to the drawings. In the drawings, like reference signs denote like elements, and overlapping description may be simplified or omitted as appropriate.
As illustrated in
The stage 3 has a flat upper face on which the recording medium is placed. The upper face of the stage 3 is parallel to the X directions and the Y directions. The stage 3 moves on the guide rail 4 to reciprocate in both the X directions. The stage 3 is movable up and down in the Z directions. Thus, the height of the recording medium placed on the stage 3 is adjustable.
The front cover 7 and the rear cover 8 are movable in both the X directions. Although the front cover 7 and the rear cover 8 are movable in the X directions in the present embodiment, a cover may be movable in a direction other than the X directions.
In
As illustrated in
The front cover 7 and the rear cover 8 are opened to expose the liquid discharge units 9A and 9B to the outside of the liquid discharge apparatus 1. When the liquid discharge units 9A and 9B are exposed to the outside, an operator can clean a maintenance unit 30, a liquid discharge head 20 (see
The liquid discharge apparatus 1 of the present embodiment includes the two liquid discharge units 9A and 9B arranged side by side in the X directions. The liquid discharge unit 9A discharges color ink and white ink. The liquid discharge unit 9B discharges a pretreatment liquid. The liquid discharged by each of the liquid discharge units 9A and 9B is not limited to the above example, and any liquid of the color ink, the white ink, and the pretreatment liquid may be discharged by each of the liquid discharge units 9A and 9B. In particular, when the recording medium is a fabric, the pretreatment liquid is preferably applied to the recording medium before the image formation using the ink. In other words, one of the liquid discharge units 9A and 9B preferably discharges the pretreatment liquid.
Since the liquid discharge units 9A and 9B have similar configurations, the liquid discharge unit 9A is described below. The liquid discharge unit 9A includes the carriage 10A, a guide rod 11, an electrical component unit 12, and the maintenance unit 30. The liquid discharge units 9A and 9B and the carriages 10A and 10B are also referred to simply as a liquid discharge unit 9 and a carriage 10, respectively, unless distinguished.
The guide rod 11 extends in the main scanning direction. The carriage 10 is movable in the main scanning direction along the guide rod 11. The carriage 10 includes multiple liquid discharge heads 20. The maintenance unit 30 is disposed at a position facing the guide rod 11 outside a liquid discharge region on one side in the transverse direction (Y directions).
The electrical component unit 12 includes, for example, a board and an electrical component cover covering the board. The electrical component unit 12 includes a control unit that controls the liquid discharge operation.
The maintenance unit 30 includes, for example, a wiping member that cleans a nozzle face of the liquid discharge head 20 and a suction mechanism that sucks the nozzle face. The wiping member may be a wiper made of, for example, rubber, or a web made of, for example, nonwoven fabric.
A process of forming an image on the recording medium by the liquid discharge head 20 is described below.
The recording medium is placed on the stage 3 and conveyed along the guide rail 4. A light emitting element including a light emitting diode (LED) is driven to emit light. The light emitting element and a light receiving element function as a height detector that detects the height of the recording medium on the stage 3 to optimally adjust the distance between the recording medium and the carriages 10A and 10B. Then, the recording medium is conveyed to a rear side of the liquid discharge apparatus 1, and the pretreatment liquid is applied to the recording medium by the liquid discharge unit 9B. Specifically, while the carriage 10B moves in the main scanning direction along the guide rod 11, the liquid discharge unit 9B discharges the pretreatment liquid from nozzles of the liquid discharge head 20 to apply the pretreatment liquid to the entire width of the recording medium in the main scanning direction. The application of the pretreatment liquid is repeated at multiple positions in the sub-scanning direction, thereby applying the pretreatment liquid to the entire recording medium. After that, the stage 3 moves forward, and the liquid discharge unit 9A discharges the color ink of multiple colors onto the recording medium by a similar method by the liquid discharge unit 9B. When white color is printed on the recording medium, for example, the liquid discharge unit 9A discharges the white ink onto the recording medium, the stage 3 moves to the rear side of the liquid discharge unit 9A again, and the liquid discharge unit 9A discharges the color ink onto the recording medium. Thus, an image is formed on the recording medium.
When the stage 3 is raised to adjust the position of the recording medium with the front cover 7 closed, a part of body of the operator such as a finger may interfere with the front cover 7 or the stage 3. For example, the finger may be between a lower end face of a front plate of the front cover 7 facing the stage 3 and an upper face of the stage 3.
To prevent the above-described interference with the front cover 7 or the stage 3, in the present embodiment, the front cover 7 includes a retraction portion that is retracted upward (retractable above the stage 3). A configuration of the retraction portion is described below with reference to
As illustrated in
In the present embodiment, when the stage 3 is raised and the finger of the operator on the stage 3 presses the lower end 25b of the door 25, an upward force is applied to the lower end 25b. Accordingly, the door 25 is swung around the rotation shaft 25a in the clockwise direction in
In the present embodiment, as illustrated in
As illustrated in
In the present embodiment, as the door 25 is swung to expose the interior inside the front cover 7, the operator can access the spread roller 29 in front of the carriage 10A. As a result, the operator can easily clean and replace the spread roller 29.
In the present embodiment, the front plate of the front cover 7 has a vertical plane, and an upper portion of the front plate is chamfered. The front plate of the front cover 7 having the vertical plane provides a large space on the front side inside the front cover 7 as compared with a front plate of the front cover 7 having an inclined plane indicated by the dashed double-dotted line in
Modifications of the door 25 are described below.
In the embodiment illustrated in
An upper portion of the door 25 from the rotation shaft 25a to the bent portion 25c is inclined so as to project forward while descending. On the other hand, the inclination direction changes at the bent portion 25c as a boundary, and a lower portion of the door 25 from the bent portion 25c to the lower end 25b is inclined so as to retreat backward while descending. The term “project forward” herein indicates projecting toward the outside of the liquid discharge apparatus 1 in the present embodiment. In other words, the bent portion 25c bends (projects) toward the outside of the liquid discharge apparatus 1.
When the finger of the operator pushes the lower end 25b or the lower portion of the door 25 upward while the stage 3 moves upward, the door 25 is swung in the clockwise direction around the rotation shaft 25a similarly to in
As described above, even when the rotation shaft 25a is disposed directly above the lower end 25b, the bent portion 25c of the door 25 allows the upward force by the finger of the operator to swing the door 25 in the clockwise direction. As a result, with the configuration according to the present embodiment, a part of the body such as the finger of the operator is prevented from interfering with the stage 3 or the front cover 7. In the embodiment illustrated in
As illustrated in
When the upward force is applied to the lower end 25b of the door 25 by the stage 3 moving upward, the door 25 is swung around the rotation shaft 25a in the clockwise direction as illustrated in
In the present embodiment illustrated in
In the above descriptions, the retraction portion of the front cover 7 is the door 25 that is swung around the rotation shaft 25a to be retracted upward, but embodiments of the present disclosure are not limited thereto. For example, as illustrated in
When the stage 3 is raised and the finger of the operator pushes a lower end 26b of the slide portion 26 upward, the slide portion 26 slides relative to the cover body of the front cover 7 to be retracted upward as illustrated in
Further, in the embodiment illustrated in
When the stage 3 is raised and the finger of the operator pushes the lower end 27b of the elastic deformation portion 27 upward, the elastic deformation portion 27 is elastically deformed and the lower end 27b is recessed (retracted) upward as indicated by the dashed line in the partially enlarged view in
In the above descriptions, the liquid discharge apparatus 1 includes the multiple (two) liquid discharge units 9A and 9B, and each of the liquid discharge units 9A and 9B includes the corresponding carriage 10A or 10B including the liquid discharge head 20 and the guide rod 11, but embodiments of the present disclosure are not limited thereto. For example, as illustrated in
In the above descriptions, the single or the multiple opening-and-closing covers slide in the front-rear direction to expose and cover the interior of the liquid discharge apparatus 1, but embodiments of the present disclosure are not limited thereto. For example, as illustrated in
As illustrated in
Also in the present embodiment, as illustrated in
As illustrated in
In the embodiment described above, the liquid discharge apparatus 1 includes only one liquid discharge unit 9 but may include the multiple liquid discharge units 9A and 9B in the left cover 13 and the right cover 14 that are opened inward in the left-right direction of the apparatus (top-bottom direction in
The left cover 13 and the right cover 14 are opened inward in the above-described embodiment, but embodiments of the present disclosure are not limited thereto. For example, as illustrated in
As illustrated in
Also in the present embodiment, as illustrated in
The configuration in which the left cover 13 and the right cover 14 are opened inward as illustrated in
Further, as illustrated in
In the above descriptions, the door (e.g., the door 25, 25A, or 25B) is provided as the retraction portion in the embodiments described above, but other retraction portion (e.g., the slide portion 26 and the elastic deformation portion 27) can be applied to the embodiments.
The above-described embodiments are illustrative and do not limit the present disclosure. Numerous additional modifications and variations are possible in light of the above teachings. It is therefore to be understood that within the scope of the appended claims
In the present disclosure, the liquid to be discharged is not limited to a particular liquid as long as the liquid has a viscosity or surface tension to be discharged from a head (liquid discharge head). However, preferably, the viscosity of the liquid is not greater than 30 mPa·s under ordinary temperature and ordinary pressure or by heating or cooling. Examples of the liquid include a solution, a suspension, or an emulsion including, for example, a solvent, such as water or an organic solvent, a colorant, such as dye or pigment, a functional material, such as a polymerizable compound, a resin, or a surfactant, a biocompatible material, such as DNA, amino acid, protein, or calcium, and an edible material, such as a natural colorant. Such a solution, a suspension, or an emulsion can be used for, e.g., inkjet ink; surface treatment liquid; a liquid for forming an electronic element component, a light-emitting element component, or an electronic circuit resist pattern; or a material solution for three-dimensional fabrication.
The term “liquid” includes not only ink but also paint, a pretreatment liquid, a binder, and an overcoat liquid.
In the present disclosure, the term “liquid discharge apparatus” includes a carriage including a liquid discharge head and drives the liquid discharge head to discharge liquid. The term “liquid discharge apparatus” used in the present disclosure includes, in addition to apparatuses to discharge liquid to a recording medium serving as materials onto which liquid can adhere, apparatuses to discharge the liquid into gas (air) or liquid.
For example, the “liquid discharge apparatus” may further include devices relating to feeding, conveying, and ejecting of the material onto which liquid can adhere and also include a pretreatment device and an aftertreatment device.
The “liquid discharge apparatus” may be, for example, an image forming apparatus to form an image on a sheet by discharging ink, or a three-dimensional fabrication apparatus to discharge fabrication liquid to a powder layer in which powder material is formed in layers to form a three-dimensional object.
The “liquid discharge apparatus” is not limited to an apparatus that discharges liquid to visualize meaningful images such as letters or figures. For example, the liquid discharge apparatus may be an apparatus that forms meaningless images such as meaningless patterns or an apparatus that fabricates three-dimensional images.
The above-described term “material onto which liquid can adhere” represents a material on which liquid is at least temporarily adhered, a material on which liquid is adhered and fixed, or a material into which liquid is adhered to permeate. Specific examples of the “material onto which liquid can adhere” include, but are not limited to, a recording medium such as a paper sheet, recording paper, a recording sheet of paper, a film, or cloth, an electronic component such as an electronic substrate or a piezoelectric element, and a medium such as layered powder, an organ model, or a testing cell. The “material onto which liquid can adhere” includes any material to which liquid adheres, unless particularly limited.
Examples of the “material onto which liquid can adhere” include any materials to which liquid can adhere even temporarily, such as paper, thread, fiber, fabric, leather, metal, plastic, glass, wood, and ceramic.
The term “liquid discharge apparatus” may be an apparatus to relatively move the liquid discharge head and the material onto which liquid can adhere. However, the liquid discharge apparatus is not limited to such an apparatus. For example, the liquid discharge apparatus may be a serial head apparatus that moves the liquid discharge head or a line head apparatus that does not move the liquid discharge head.
Examples of the liquid discharge apparatus further include: a treatment liquid applying apparatus that discharges a treatment liquid onto a sheet to apply the treatment liquid to the surface of the sheet, for reforming the surface of the sheet; and an injection granulation apparatus that injects a composition liquid, in which a raw material is dispersed in a solution, through a nozzle to granulate fine particle of the raw material.
The terms “image formation,” “recording,” “printing,” “image printing,” and “fabricating” used in the present disclosure may be used synonymously with each other.
Aspects of the present disclosure are, for example, as follows.
Aspect 1
A liquid discharge apparatus includes a liquid discharge head, a stage, a guide rail, and an opening-and-closing cover. The liquid discharge head discharges a liquid to a recording medium. The stage moves in a vertical direction to move the recording medium on the stage. The guide rail holds the stage. The stage is movable in a conveyance direction intersecting the vertical direction. The opening-and-closing cover is slidable in one of the conveyance direction and a main scanning direction intersecting both the conveyance direction and the vertical direction. The opening-and-closing cover includes a retraction portion retractable above the stage.
Aspect 2
In the liquid discharge apparatus according to Aspect 1, the retraction portion includes a door including a rotation shaft extending in the main scanning direction, and the door is swingable around the rotation shaft to move in the vertical direction.
Aspect 3
In the liquid discharge apparatus according to Aspect 2, the rotation shaft is shifted from a position directly above a lower end of the retraction portion in the conveyance direction in a closed state of the opening-and-closing cover.
Aspect 4
In the liquid discharge apparatus according to Aspect 2, the retraction portion includes a bent portion between a lower end of the retraction portion and the rotation shaft. The bent portion is bent toward an outside of the liquid discharge apparatus in the conveyance direction.
Aspect 5
In the liquid discharge apparatus according to any one of Aspects 1 to 4, the opening-and-closing cover has a front face extending in the vertical direction.
Aspect 6
The liquid discharge apparatus according to any one of Aspects 1 to 5 further includes a contact roller between the retraction portion and the liquid discharge head in the conveyance direction to contact a surface of the recording medium.
Aspect 7
In the liquid discharge apparatus according to any one of Aspects 1 to 6, the opening-and-closing cover includes a front cover and a rear cover. The front cover is slidable in a front direction in the conveyance direction, and the rear cover is slidable in a rear direction opposite to the front direction to be separated from the front cover, to open the opening-and-closing cover.
Aspect 8
In the liquid discharge apparatus according to any one of Aspects 2 to 7, the door is swung toward an outside of the liquid discharge apparatus to be retracted upward.
Aspect 9
In the liquid discharge apparatus according to any one of Aspects 2 to 7, the door is swung toward an inside of the liquid discharge apparatus to be retracted upward.
Aspect 10
In the liquid discharge apparatus according to Aspect 1, or in the liquid discharge apparatus according to Aspect 1 and at least any one of Aspect 5, 6, and 7, the retraction portion includes a slide portion slidable in the vertical direction.
Aspect 11
In the liquid discharge apparatus according to Aspect 1, or in the liquid discharge apparatus according to Aspect 1 and at least any one of Aspects 5, 6, and 7, the retraction portion includes an elastic deformation portion elastically deformable in an upward direction in the vertical direction.
As described above, according to one aspect of the present disclosure, the liquid discharge apparatus prevents, for example, a finger from interfering with the opening-and-closing cover or the stage.
The above-described embodiments are illustrative and do not limit the present invention. Thus, numerous additional modifications and variations are possible in light of the above teachings. For example, elements and/or features of different illustrative embodiments may be combined with each other and/or substituted for each other within the scope of the present invention.
Number | Date | Country | Kind |
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2022-155224 | Sep 2022 | JP | national |