JP2017202633A - Liquid ejection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid ejection device that is able to sufficiently hold idly ejected liquid by a plurality of liquid receiving means provided on a conveyance drum and that is able to hinder leakage of held liquid.SOLUTION: A liquid ejection device comprises: a cylindrical conveyance drum 10 that conveys a recording medium 40 while holding it on its outer peripheral surface; a liquid ejection head 21 having a plurality of nozzles such that a nozzle line is arranged in a direction orthogonal to a rotating direction of the conveyance drum 10; a plurality of liquid receiving means 13 having an opening in an outer peripheral face of the conveyance drum 10, having a liquid holding absorbent 14, and receiving a liquid idly ejected from the liquid ejection head 21; detection means for detecting a quantity of liquid held by the absorber 14; and control means for controlling the position of the liquid receiving means 13. The control means exerts control such that specific liquid receiving means is selected from a plurality of liquid receiving means 13 on the basis of a detection result of the detecting means and an opening of the selected liquid receiving means 13 is disposed upward with respect to a horizontal direction when the conveyance drum 10 is stopped.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a liquid ejection apparatus.

As an apparatus for ejecting a liquid, for example, an ink jet recording apparatus such as a printer, a facsimile apparatus, a copying apparatus, a plotter, or a multifunction machine having a plurality of functions thereof is known.
An ink jet recording apparatus includes a recording head composed of a liquid ejection head that ejects ink droplets, and ejects ink droplets onto a recording medium such as paper, a resin sheet, and a cloth to form images such as characters and graphics. A device for recording (printing).

  As an ink jet recording apparatus, a line type apparatus is known in which a recording head (line head) in which a plurality of nozzles are arranged is fixed over the entire width of the recording area in the main scanning direction, and a single line image is formed simultaneously. It has been.

  In the ink jet recording apparatus, if the recording head is not driven for a long time, the ink remaining in the nozzles evaporates and its viscosity increases, resulting in nozzle clogging. Similarly, when the frequency of ink ejection varies depending on the image to be formed, ink drying and thickening occur at nozzles with a low ink ejection frequency, which may cause a recording failure in which a desired amount of ink cannot be ejected at a desired timing. .

  On the other hand, idle recording (also referred to as preliminary ejection) for causing the recording head to discharge residual ink in the nozzles after the recording of one job is completed or before the recording of the next job is started. And a maintenance method for maintaining the ink ejection performance is known.

  In a line-type ink jet recording apparatus, during non-recording, only the conveying means (for example, a conveying drum) is moved without conveying the recording medium, and the recording ink is ejected idlely onto the conveying means, and the ejected ink is discharged. There are known ones that wipe off on the downstream side and those that collect liquid by providing liquid receiving means (empty ejected ink receiver) at a position corresponding to the recording head of the conveying means (see, for example, Patent Document 1).

  Patent Document 1 discloses that an inkjet printer is designed to be capable of recovering defective discharge in a short time with a small device, and is easy to maintain and has no printing position deviation. And an ink discharge failure recovery means for performing an ink discharge failure recovery operation of the nozzle, and the head is disposed outside the paper holding drum, and the ink discharge failure detection means and the ink The ejection failure recovery means is disposed inside the paper holding drum and at a position facing the module, and the paper holding drum is provided on the circumferential surface with an ink ejection failure detection means, an ink ejection failure recovery means, and a module. An ink jet printer having an opening for facing is disclosed.

  An empty discharge ink receiver (hereinafter also referred to as “liquid receiving means”) provided on the transport drum is provided at an opening at a position facing the recording head, but its size is limited and the amount of recoverable liquid is also limited. There is a problem of being. Further, in a state where the liquid receiving means holds a large amount of liquid, the liquid held by the centrifugal force due to the rotation of the transport drum may scatter, contaminating the surroundings and degrading the image quality.

On the other hand, a method is conceivable in which a plurality of liquid receiving means are provided along the outer periphery of the transport drum and these are sequentially applied. By providing a plurality of liquid receiving means, a sufficient amount of liquid can be held.
However, with this method, the transport drum cannot be stopped with all of the plurality of liquid receiving means opened upward. Therefore, when the rotation of the transport drum is stopped for a long time due to the stop of the printing operation, there is a problem that the held ink leaks from the liquid receiving means that opens sideways or downward.

  Therefore, the present invention provides a liquid ejection device that can sufficiently hold an empty ejected liquid and that can suppress leakage of the retained liquid by a plurality of liquid receiving means provided on a transport drum. Objective.

  In order to achieve this object, a liquid ejection apparatus according to the present invention includes a cylindrical conveyance drum that conveys a recording medium while holding the recording medium on an outer peripheral surface, and a plurality of nozzles that eject liquid. A liquid discharge head disposed in a direction perpendicular to the rotation direction of the transport drum; and an absorbent body that opens to an outer peripheral surface of the transport drum and holds the liquid, and receives the liquid discharged from the liquid discharge head. A plurality of liquid receiving means, a detecting means for detecting the amount of liquid held by the absorber, and a control means for controlling the position of the liquid receiving means, wherein the control means is a detection result of the detecting means. Based on the above, a specific liquid receiving means is selected from the plurality of liquid receiving means, and the opening of the selected liquid receiving means is controlled to be arranged upward with respect to the horizontal direction when the transport drum is stopped. Do Preparative a liquid discharge apparatus characterized by.

  According to the present invention, it is possible to provide a liquid ejecting apparatus that can sufficiently hold an empty ejected liquid and suppress leakage of the retained liquid by a plurality of liquid receiving means provided on a transport drum. Can do.

1 is a schematic configuration diagram illustrating an example in which a liquid ejection apparatus of the present invention is applied to an image forming apparatus system. It is an enlarged view showing a schematic configuration of a liquid discharge head and a transport drum of the liquid discharge apparatus according to the present embodiment. It is explanatory drawing which shows an example of the operation | movement order of the liquid discharge apparatus which concerns on this embodiment.

  Hereinafter, a liquid discharge apparatus of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments described below, and other embodiments, additions, modifications, deletions, and the like can be changed within a range that can be conceived by those skilled in the art, and any aspect is possible. As long as the functions and effects of the present invention are exhibited, the scope of the present invention is included.

The liquid ejection apparatus according to the present invention is an apparatus that ejects liquid, and includes a liquid ejection head or a liquid ejection unit and drives the liquid ejection head to eject liquid.
This “apparatus for discharging liquid” may include means for feeding, transporting, and discharging a liquid to which liquid can adhere, as well as a pre-processing apparatus and a post-processing apparatus.
Further, the “apparatus for ejecting liquid” is not limited to an apparatus in which significant images such as characters and figures are visualized by the ejected liquid. For example, what forms a pattern etc. which does not have a meaning in itself, and what forms a three-dimensional image are also included.
The above-mentioned “applicable liquid” means that the liquid can be attached at least temporarily and adheres and adheres, or adheres and penetrates. Specific examples include a recording medium such as paper, recording paper, recording paper, film, and cloth, and any medium to which a liquid adheres is included unless otherwise specified.
The material of the above-mentioned “material to which liquid can adhere” is not limited as long as liquid such as paper, thread, fiber, fabric, leather, metal, plastic, glass, wood, ceramics can be adhered even temporarily.
The “liquid” is not particularly limited as long as it has a viscosity and surface tension that can be ejected from the head, and the viscosity is 30 mPa · s or less at room temperature, normal pressure, or by heating and cooling. Preferably there is.

FIG. 1 is a schematic configuration diagram showing an example in which the liquid ejection apparatus of the present invention is applied to an image forming apparatus system.
The liquid ejection apparatus according to this embodiment applied to the image forming apparatus system is a printer that forms an image by ejecting ink, which is a liquid for image formation, by an inkjet method.

The liquid ejection apparatus according to the present embodiment includes a cylindrical conveyance drum 10 that conveys a sheet 40 as a recording medium while holding it on an outer peripheral surface, and a plurality of nozzles that eject liquid, and the nozzle row is a conveyance drum The liquid discharge head 21 is disposed in a direction orthogonal to the rotation direction of the ten rotations. The liquid discharge head 21 is a recording head that discharges ink by an inkjet method.
On the downstream side in the paper conveyance direction of the image forming unit 1, a drying unit 2 that dries paper on which an image is formed by an inkjet method, and a paper reverse conveyance unit 4 that further forms an image on the back surface of the paper are provided. On the side, a paper discharge unit for discharging dry paper is provided.
The image forming apparatus system may further include a paper feeding unit that feeds stacked paper and a registration adjustment unit that performs paper registration correction on the upstream side of the image forming unit 1 in the paper conveyance direction.

  Next, a series of image forming operations for forming an image on a sheet in the image forming apparatus system according to the present embodiment will be described.

The sheets 40 separated and picked up one by one are subjected to registration correction by the registration adjusting unit and then conveyed to the image forming unit 1 at a predetermined timing.
The sheet 40 conveyed to the image forming unit 1 is positioned on the surface of the conveyance drum 10 with the leading end sandwiched between grippers 12 provided on the surface of the conveyance drum 10. In addition, the transport drum 10 has numerous air suction holes formed on the surface thereof, and the entire sheet 40 can be sucked from the back surface and held in close contact with the surface of the transport drum 10. The paper 40 positioned on the surface of the transport drum 10 by the gripper 12 and closely held by air suction is rotated in the direction of the arrow in the drawing, whereby the direction of the liquid ejection head 21 (21a to 21f). It is conveyed to.

In the image forming unit 1, units of the liquid discharge head 21 are sequentially arranged along a circumferential surface of the transport drum 10 in a state where a predetermined liquid is filled. Examples of the filled liquid include black, cyan, magenta, and yellow inks for performing color printing, and coating liquids.
The paper 40 held on the surface of the transport drum 10 is transported to the lower part of the liquid ejection head 21 for each color, and the ink 40 and the coating liquid of each color are ejected from the liquid ejection head 21 at a predetermined timing. An image is formed on the surface.

  A gripper 12 that holds the leading edge of the paper 40 is attached to the transport drum 10 at three locations on the circumferential surface. Thus, image formation can be performed on the three sheets of paper 40 while the transport drum 10 makes one rotation around the rotation shaft 11.

The liquid discharge head includes a nozzle that frequently discharges liquid and a nozzle that does not discharge much. In the latter nozzle, the liquid may dry and thicken, and a desired amount of liquid may not be ejected at a desired timing. In order to prevent this, idle discharge is performed when the liquid is not discharged for a predetermined time. The liquid receiving means 13 for receiving the liquid discharged by the idle discharge is disposed at a position where the balance is not lost in the rotation of the transport drum 10. In the example of FIG. 1, the grippers 12 are provided at equal intervals.
Inside the liquid receiving means, an absorbent body 14 capable of holding the empty discharged liquid is provided in a replaceable manner.

As a material of the absorber 14, a polyester felt fiber material or an acrylonitrile felt fiber material is preferable, and a mixture of a polyester felt fiber material and an acrylonitrile felt fiber material is also preferable. If the fiber diameter, fiber length, arrangement direction, and the like of the used fiber material are appropriately changed, the liquid holding capacity of the absorbent body 14 can be finely adjusted.
Other examples include polyamide fiber materials, polypropylene fiber materials, polyvinyl alcohol fiber materials, polyvinylidene chloride fiber materials, polyurethane fiber materials, and the like.
Considering the absorbability of recording liquid such as ink, a polyester fiber material is more preferable, and it is also preferable to use a material system in which the above materials are mixed.

  The paper 40 on which the image is formed by the image forming unit 1 is conveyed to the drying unit 2. The drying unit 2 is provided with a drying unit 31. When the paper 40 passes below the drying unit 31, moisture in the ink is evaporated, and curling of the paper 40 can be prevented.

In addition, the drying unit 2 is provided with a paper reversing unit 51 and a paper reversing and conveying unit 50. At the time of duplex printing, the paper 40 is reversed here and conveyed to the image forming unit 1 again.
After the paper reversing unit 51 switches the transport direction of the paper 40, the paper reversing transport unit 50 transports the paper 40 in the direction of the image forming unit 1. Before the sheet 40 reaches the conveyance drum 10, the registration is corrected by the registration roller 5. The registration-corrected paper 40 is transported to the transport drum 10, sandwiched between the grippers 12, and held on the front surface of the transport drum 10 with the back surface on which no image is formed facing up. In the image forming unit 1, image formation is performed by the liquid ejection head 21 on the back surface of the paper 40 held on the front surface of the transport drum 10 where the image is not formed in the same manner as described above.

  The double-sided printed paper 40 that has passed through the drying unit 2 is conveyed to the paper discharge unit in the same manner during both single-sided printing and double-sided printing. In the paper discharge unit, the sheets 40 are stacked in an orderly manner.

  FIG. 2 is an enlarged view showing a schematic configuration of the liquid discharge head 21 and the transport drum 10 of the image forming unit 1, and shows a state where the liquid discharge head 21 is close to the surface of the transport drum 10 and is in a position to be imprinted. Show.

  The liquid discharge head 21 is disposed in a state where a predetermined gap is maintained with respect to the surface of the transport drum 10. The liquid discharge heads 21 are arranged in order from the upstream side to the downstream side in the conveyance direction of the paper 40, and are arranged in an inclined state as going to the side surface side of the conveyance drum 10. For example, since the liquid discharge head d is arranged on the upper portion of the transport drum 10, it is in a substantially horizontal state, but the other liquid discharge heads 21 a, 21 b, 21 c, 21 e, 21 f are disposed on the side surface of the transport drum 10. Therefore, it is inclined. The number of liquid discharge heads 21 for each color is an example, and the present invention is not limited to this.

  As described above, the transport drum 10 includes the grippers 12 that grip the leading end of the paper 40 at three locations on the circumference. The transport drum 10 has innumerable air suction holes formed on the surface, and the back surface of the paper 40 can be sucked from the air suction holes by an air suction fan so that the paper 40 is brought into close contact with the front surface.

The liquid discharge apparatus according to the present embodiment includes a transport drum 10, a liquid discharge head 21, and an absorbent body 14 that opens to the outer peripheral surface of the transport drum 10 and holds liquid. A plurality of liquid receiving means 13 for receiving liquid are provided.
Furthermore, a detection means for detecting the amount of liquid held by the absorber 14 and a control means for controlling the position of the liquid receiving means 13 are provided, and the control means is configured based on the detection results of the detection means. A specific liquid receiving means 13 is selected from the receiving means 13, and the opening of the selected liquid receiving means 13 is controlled to be arranged upward with respect to the horizontal direction when the transport drum 10 is stopped.

  Here, the phrase “the opening of the liquid receiving means 13 is“ disposed upward with respect to the horizontal direction ”” means that the opening is disposed at least in a direction that is not horizontally or downward. “Upward” means broadly upward and is not limited to upward in the vertical direction.

  The control means selects a specific liquid receiving means 13 from the plurality of liquid receiving means 13 based on the detection result of the detecting means, and the selected liquid receiving means 13 receives the empty discharged liquid. Control to place it preferentially at the position.

  In this manner, control is performed so that preferential ejection is preferentially performed on one of the plurality of liquid receiving means 13, and when the printing is stopped, the liquid receiving means 13 faces the opening upward in the horizontal direction. Therefore, it is possible to sufficiently hold the liquid ejected in an empty manner and to suppress the leakage of the liquid held with a simple configuration over a long period of time.

When preemptive ejection is preferentially performed on one of the plurality of liquid receiving means 13, it is expected that the weight balance in the transport drum 10 changes. Therefore, the maximum amount of liquid that can be held by the absorber 14 is preferably set to an amount that does not cause uneven rotation of the transport drum 10.
Since the density of the liquid (ink) used for printing in this embodiment is about 1.1 g / m ³ , the density of aluminum (2.7 g / m ³ ) generally used as the material of the transport drum 10 is Since it is small compared with the density of iron (7.8 g / m ³ ), even when the amount of the absorbent body 14 held reaches the maximum value, the influence on the weight balance is considered to be small.

Since the transport drum 10 rotates at a high speed during the printing operation, there is a possibility that a large amount of liquid held in the absorber 14 is scattered by centrifugal force. Therefore, it is preferable that the maximum amount of liquid that can be held by the absorber 14 is an amount that does not scatter due to the rotation of the transport drum 10.
In addition, when the diameter of the conveyance drum 10 of this embodiment is 900 mm and the linear velocity is 1,250 mm / s, the relative centrifugal acceleration is 0.35 G (G is gravitational acceleration). Thus, since the centrifugal force at the time of rotation is extremely smaller than the gravity at the time of stop, the liquid held in the absorber 14 may cause a problem of leakage at the time of stop rather than scattering due to the centrifugal force at the time of rotation. It is thought that the nature is large.

If the amount of liquid held in the absorber 14 is small, the possibility of leakage is reduced even if the opening of the liquid receiving means 13 is downward. Therefore, it is possible to prevent leakage by frequently replacing the absorber 14, but the cost of replacement work and replacement members increases.
On the other hand, in the liquid ejection device of the present embodiment, the amount of liquid that can be ejected to the absorber 14 is increased, the replacement cycle of the absorber 14 is extended, and cost reduction can be realized.

The arrangement control of the liquid receiving means 13 will be described based on FIG.
In order to determine the amount of liquid in the absorber 14 detected by the detecting means, it is necessary to provide a predetermined threshold value.
When the detection unit detects that the amount of liquid in the absorber 14 of the selected first liquid receiving unit 13a has reached the threshold value, the control unit has a threshold value for the amount of liquid held by the absorption unit 14. The means selects the second liquid receiving means 13c and controls the second liquid receiving means 13c to be preferentially disposed at a position for receiving the empty liquid, and the first liquid receiving means Control is performed so that the opening 13a and the opening of the second liquid receiving means 13c are arranged upward with respect to the horizontal direction when the transport drum 10 is stopped.

First, a description will be given with reference to FIG.
Among the plurality of liquid receiving means 13 provided at equal intervals between the plurality of grippers 12, one liquid receiving means 13a is selected, and the liquid receiving means 13a is preferentially placed at a position for receiving the liquid ejected empty. It controls so that it may arrange | position and it arrange | positions so that an opening part may be arrange | positioned upwards with respect to a horizontal direction when the conveyance drum 10 stops.
The liquid receiving means 13a to be selected can be set in advance, but the liquid receiving means located at the position facing the liquid discharge head 21 when it is determined that it is necessary to perform the idle discharge is set. If not (13b or 13c), the liquid receiving means (13b or 13c) can be used. In the latter case, after the empty liquid is received until another liquid receiving means (13b or 13c) reaches the threshold value, the preset liquid receiving means 13a may be selected.

Next, description will be made with reference to FIG.
When the amount of liquid in the absorbent body 14 of the selected first liquid receiving means 13a reaches a threshold value (for example, a state close to the maximum allowable receiving amount), the second liquid receiving means (13b, 13c) receives the second amount. The liquid receiving means 13b is selected and controlled so that the liquid receiving means 13b is preferentially disposed at a position for receiving the empty liquid, and the opening is directed upward with respect to the horizontal direction when the transport drum 10 is stopped. Control to be placed in. When the transport drum 10 is stopped, the opening of the first liquid receiving means 13a and the opening of the second liquid receiving means 13b are controlled so as to be arranged upward with respect to the horizontal direction.

The maximum receiving amount (the maximum value that can be held) of the absorber 14 varies depending on the material of the absorber 14 and the component of the liquid to be discharged, but is an amount corresponding to 80 to 90% of the volume of the liquid receiving means 13. can do.
The value defined as the threshold value can be an amount corresponding to 70 to 80% of the volume of the liquid receiving means 13.

  In FIG. 2 (B), when the amount of liquid in the absorber 14 of the first liquid receiving means 13a and the second liquid receiving means 13b has reached the threshold value, the third liquid receiving means 13c is empty. Discharging is performed. Further, when the amount of liquid in the absorber 14 of the third liquid receiving means 13c reaches the threshold value, the absorbers 14 of all the liquid receiving means (13a, 13b, 13c) equally reach the maximum demand. So as to accept the empty liquid discharge.

  That is, when the detecting means detects that the liquid amount of the absorbers 14 of all the liquid receiving means 13 has reached the threshold value, the control means determines that the liquid amounts of the absorbers 14 of all the liquid receiving means 13 are the same. Control is performed so as to sequentially arrange liquids that have been ejected idle until the maximum value that can be held exceeds the threshold value.

  In this state, it is difficult to make the openings of all the liquid receiving means 13 upward in the horizontal direction. As described above, the liquid held in the absorber 14 is not scattered by the centrifugal force during the rotation of the transport drum 10, and leakage at the time of stoppage is likely to be a problem. When the amount of liquid in the absorber 14 of the liquid receiving means 13 that cannot be placed upward exceeds the maximum value that can be held, printing is stopped and the absorber 14 is replaced, thereby suppressing the occurrence of leakage. can do.

  In the liquid receiving means 13 of the liquid ejection apparatus according to the present embodiment, when the liquid amount of the absorber 14 reached the threshold value and left for 20 hours with the opening facing downward, no liquid leakage was observed. .

The liquid ejection apparatus according to the present embodiment further includes a display unit. When the liquid amount of all the absorbers 14 reaches a maximum value that can be held, the liquid ejection operation is stopped and the display unit includes the absorber 14. It is preferable to display a message prompting replacement.
By adopting such a configuration, it is possible to hold the liquid by empty discharge to the maximum for all the arranged absorbers 14, extend the replacement cycle, and complete the replacement work at once. Is very efficient.

FIG. 3 shows the control flow described above. FIG. 3 shows an example in which three liquid receiving means 13 are provided on the transport drum 10 as shown in FIG. 2, but the number of liquid receiving means 13 is not limited to three. It can be selected appropriately.
The “absorber state” defines the ratio of the liquid amount to the volume of the liquid receiving means 13, and the threshold value is 80% and the maximum value that can be held is 90%.

  Step 1 is an initial state, and the accepting amount of the absorber is zero in any of the liquid receiving means A to C.

In step 2, the selected first liquid receiving means A is preferentially arranged at a position for receiving the empty liquid. At this time, the opening of the liquid receiving means A is disposed upward with respect to the horizontal direction when the transport drum 10 is stopped.
When the amount of liquid held by the absorber of the liquid receiving means A reaches the threshold value (80%), the second liquid receiving means B is selected as step 3.
In step 3, the liquid receiving means B is preferentially disposed at a position for receiving the empty liquid. When the transport drum is stopped, the opening of the liquid receiving means A and the opening of the liquid receiving means B are arranged upward with respect to the horizontal direction.

When the amount of liquid held by the absorber of the liquid receiving means B reaches the threshold value (80%), the third liquid receiving means C is selected as step 4.
In step 4, the liquid receiving means C is preferentially disposed at a position for receiving the empty liquid. When the transport drum is stopped, it is arranged so that at least the opening of the liquid receiving means C faces upward in the horizontal direction.

  If four or more liquid receiving means are provided, as in the above step, a new liquid receiving means in the initial state is selected, and control is performed so as to place it preferentially at a position where empty discharged liquid is received. Repeat this step.

When the liquid amounts of the absorbers of all the liquid receiving means reach the threshold value, in step 5, the liquid receiving means are emptied until the liquid amount of all the absorbent bodies exceeds the threshold value and reaches the maximum value that can be held. It arrange | positions sequentially in the position which receives the discharged liquid.
Then, when the amount of liquid in the absorbers of all the liquid receiving means reaches the maximum value that can be held, the replacement state of step 6 is required. In step 6, for example, the liquid discharge operation is stopped, and a display for prompting replacement of the absorber is performed on the display means.

DESCRIPTION OF SYMBOLS 1 Image formation part 10 Conveying drum 12 Gripper 13 Liquid receiving means 14 Absorber 21 Liquid discharge head 40 Recording medium (paper)

Japanese Patent Laid-Open No. 2005-125589

Claims (5)

A cylindrical transport drum for transporting the recording medium held on the outer peripheral surface;
A liquid discharge head having a plurality of nozzles for discharging liquid, the nozzle row being arranged in a direction orthogonal to the rotation direction of the transport drum;
A plurality of liquid receiving means that open to the outer peripheral surface of the transport drum and have an absorber that holds the liquid, and that receives the liquid that is idly discharged from the liquid discharge head;
Detecting means for detecting the amount of liquid held by the absorber;
Control means for controlling the position of the liquid receiving means,
The control means selects a specific liquid receiving means from the plurality of liquid receiving means based on the detection result of the detecting means,
The liquid ejecting apparatus, wherein the selected opening of the liquid receiving means is controlled to be arranged upward with respect to a horizontal direction when the transport drum is stopped. The control means selects a specific liquid receiving means from the plurality of liquid receiving means based on the detection result of the detecting means,
2. The liquid ejecting apparatus according to claim 1, wherein the selected liquid receiving means is controlled so as to be preferentially disposed at a position for receiving the empty discharged liquid. Having a threshold for the amount of liquid held by the absorber, and the detecting means detects that the amount of liquid in the absorber of the selected first liquid receiving means has reached the threshold;
The control means selects the second liquid receiving means and controls the second liquid receiving means so that the second liquid receiving means is preferentially disposed at a position for receiving the empty liquid, and the first liquid The opening of the receiving means and the opening of the second liquid receiving means are controlled so as to be arranged upward with respect to the horizontal direction when the transport drum is stopped. Liquid discharge device. Having a threshold for the amount of liquid held by the absorber, and when the detecting means detects that the threshold has been reached for the amount of liquid in the absorber of all the liquid receiving means,
The control means performs control so that the liquid amount of the absorber of all the liquid receiving means is sequentially arranged at a position to receive the liquid ejected idle until the liquid amount reaches a maximum value that can be held exceeding a threshold value. The liquid discharge apparatus according to claim 1, wherein the liquid discharge apparatus is a liquid discharge apparatus.   It further comprises a display means, and when the liquid amount of all of the absorbers reaches a maximum value that can be held, the liquid discharge operation is stopped and a display that prompts the display means to replace the absorber is provided. The liquid discharge means according to any one of claims 1 to 4.

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