JP2019130874A - Liquid storage container and device for discharging liquid - Google Patents

Abstract

To improve versatility of a liquid storage container.SOLUTION: A liquid storage container 400 comprises: a tank body 402 having a recess 402a for forming a liquid storage part 401 for storing a liquid; and a lid member 403 for closing an opening of the recess 402a of the tank body 402. The liquid storage part 401 is formed into a circular shape, the tank body 402 comprises tubes 406 (406A, 406B) being two channel members communicated to inside of the liquid storage part 401 and being attached to the tank body, the two tubes 406A, 406B are arranged radially in the liquid storage part 401 in view from an axial direction, and extends to the vicinity of a center beyond the center of the liquid storage part 401.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a liquid container and a device for discharging liquid.

  For example, a printing device that discharges liquid from a liquid discharge head arranged radially around the conveyance drum and applies the liquid to the sheet-like member for printing while winding the sheet-shaped member around the conveyance drum. An apparatus for discharging a liquid is known (Patent Document 1).

JP 2017-226491 A

  By the way, some apparatuses that discharge liquid include a liquid storage container (also referred to as a sub tank) having a liquid storage section that temporarily stores liquid to be supplied to the liquid discharge head.

  When this liquid container is arranged radially around the transport drum, like the liquid ejection head, the liquid container is inclined and the liquid level in the liquid container is increased depending on the position of the liquid container. Changes.

  For this reason, depending on the arrangement position of the liquid container, the opening of the flow path member passing through the liquid container and the outside may be removed from the liquid and suck in bubbles, and different liquid containers are used depending on the arrangement position. There is a problem that must be.

  The present invention has been made in view of the above problems, and an object thereof is to improve the versatility of a liquid container.

In order to solve the above-described problem, a liquid container according to claim 1 of the present invention includes:
A liquid storage container for storing a liquid to be supplied to a liquid discharge head,
A container body that forms a liquid storage portion for storing the liquid;
Two flow path members communicating with the liquid storage portion,
The two flow path members are arranged radially in the liquid container.

  According to the present invention, the versatility of the liquid container can be improved.

1 is a schematic explanatory diagram of a printing apparatus according to a first embodiment of the present invention. It is a plane explanatory view of an example of a head array. 2 is an external perspective view illustrating an example of a liquid discharge head. FIG. It is sectional explanatory drawing of the direction (liquid chamber longitudinal direction) orthogonal to the nozzle arrangement direction of the head. FIG. 2 is a block explanatory diagram for explaining an example of a liquid circulation device in the printing apparatus. It is front explanatory drawing of the liquid storage container which concerns on 1st Embodiment of this invention. It is side sectional explanatory drawing similarly. It is explanatory drawing of the fixing surface of a container main body and a lid member similarly. It is front explanatory drawing explaining the attitude | position different from FIG. 6 of the liquid container. FIG. 6 is an explanatory diagram for explaining a state in which a discharge unit including the liquid container as a sub tank is disposed around a transport drum. It is front explanatory drawing of the liquid container of a comparative example. It is side sectional explanatory drawing similarly. It is explanatory drawing with which it uses for description of an example of the state which has arrange | positioned the discharge unit which contains the liquid storage container of the comparative example as a subtank around the conveyance drum. FIG. 6 is an explanatory view for explaining another example of a state in which a discharge unit including a liquid storage container of a comparative example as a sub tank is arranged around a transport drum. It is front explanatory drawing of the liquid container which concerns on 2nd Embodiment of this invention. It is front explanatory drawing of the liquid storage container which concerns on 3rd Embodiment of this invention.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. First, an outline of a printing apparatus as an apparatus for ejecting liquid according to the first embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a schematic explanatory view of the printing apparatus, and FIG. 2 is a plan explanatory view of an example of a head array.

  The printing apparatus 1 includes a carry-in unit 10, a printing unit 20, a drying unit 30, and a carry-out unit 40. The printing apparatus 1 applies liquid to the sheet material P, which is a sheet-like member carried in from the carry-in unit 10, by applying a liquid in the printing unit 20, and the liquid adhered to the sheet material P in the drying unit 30. After drying, the sheet material P is discharged to the carry-out unit 40.

  The carry-in unit 10 includes a carry-in tray 11 on which a plurality of sheet materials P are stacked, a feeding device 12 that separates and feeds the sheet materials P from the carry-in tray 11 one by one, and a resist that feeds the sheet material P to the printing unit 20. A roller pair 13 is provided.

  As the feeding device 12, any feeding device such as a device using a roller or a roller or a device using air suction can be used. After the leading edge of the sheet material P sent out from the carry-in tray 11 by the feeding device 12 reaches the registration roller pair 13, the registration roller pair 13 is driven at a predetermined timing to be sent out to the printing unit 20.

  The printing unit 20 includes a conveyance drum that is a conveyance drum that conveys the sheet material P supported on the outer peripheral surface, and a liquid ejection unit 22 that ejects liquid toward the sheet material P supported on the conveyance drum. .

  The printing unit 20 includes a transfer cylinder 24 that receives the fed sheet material P and passes it to the transport drum, and a transfer cylinder 25 that transfers the sheet material P transported by the transport drum to the drying unit 30.

  The leading end of the sheet material P conveyed from the carry-in unit 10 to the printing unit 20 is gripped by a sheet gripper provided on the surface of the transfer cylinder 24 and is conveyed along with the rotation of the transfer cylinder 24. The sheet material P conveyed by the transfer drum 24 is transferred to the conveyance drum at a position facing the conveyance drum.

  A sheet gripper is also provided on the surface of the transport drum, and the leading end of the sheet material P is gripped by the sheet gripper. A plurality of suction holes are dispersedly formed on the surface of the transport drum, and a suction air flow toward the inside of the transport drum is generated by the suction device 26 in each suction hole.

  Then, the sheet material P transferred from the transfer drum 24 to the transport drum is gripped at the tip by the sheet gripper, is attracted to the surface of the transport drum by the suction airflow, and is transported along with the rotation of the transport drum.

  The liquid discharge unit 22 includes a discharge unit 23 (23C, 23M, 231Y, 231K) including the head array 51 shown in FIG. The head array 51 includes, for example, liquid ejection heads (which are also simply referred to as “heads”) 100 arranged in a staggered manner on the base member 52, but is not limited thereto.

  Here, the head array 51 of the discharge unit 23C is a cyan (C) liquid, the head array 51 of the discharge unit 23M is a magenta (M) liquid, and the head array 51 of the discharge unit 23Y is a yellow (Y) liquid. The head array 51 of the discharge unit 23K discharges a black (K) liquid. If necessary, a head or head array that discharges a special liquid such as white, gold, or silver, or a head or head array that discharges a processing liquid such as a surface coating liquid may be provided.

  The ejection operations of the heads 100 of the liquid ejection unit 22 are controlled by drive signals corresponding to print information. When the sheet material P carried on the transport drum passes through a region facing the liquid ejection unit 22, the liquid of each color is ejected from the ejection unit 23, and an image corresponding to the print information is printed.

  The drying unit 30 transports the drying unit 31 for drying the liquid adhered on the sheet material P in the printing unit 20 and the sheet material P transported from the printing unit 20 in a sucked state (suction transport). And a suction conveyance mechanism section 32.

  The sheet material P conveyed from the printing unit 20 is received by the suction conveyance mechanism unit 32, then conveyed so as to pass through the drying mechanism unit 31, and delivered to the carry-out unit 40.

  When passing through the drying mechanism 31, the liquid on the sheet material P is subjected to a drying process. As a result, liquid components such as moisture in the liquid evaporate, the colorant contained in the liquid is fixed on the sheet material P, and curling of the sheet material P is suppressed.

  The carry-out unit 40 includes a carry-out tray 41 on which a plurality of sheet materials P are stacked. The sheet material P conveyed from the drying unit 30 is sequentially stacked and held on the carry-out tray 41.

  In the printing apparatus 1, for example, a pre-processing unit that performs pre-processing on the sheet material P is disposed on the upstream side of the printing unit 20, or after the post-processing is performed on the sheet material P to which liquid has adhered. The processing unit can be disposed between the drying unit 30 and the carry-out unit 40.

  Examples of the pretreatment unit include a pre-treatment that applies a treatment liquid for reacting with the liquid and suppressing bleeding to the sheet material P. Further, as the post-processing unit, for example, a sheet reversing conveyance process for inverting the sheet printed by the printing unit 20 and sending it again to the printing unit 20 to print on both sides of the sheet material P, or a plurality of sheets What performs the process etc. to bind is mentioned.

  Next, an example of the liquid discharge head will be described with reference to FIGS. FIG. 3 is an external perspective explanatory view of the liquid discharge head, and FIG. 4 is a cross-sectional explanatory view in a direction (liquid chamber longitudinal direction) orthogonal to the nozzle arrangement direction of the head.

  This liquid discharge head is a flow-through head, and a nozzle plate 101, a flow path plate 102, and a vibration plate member 103 as a wall surface member are laminated and joined. A piezoelectric actuator 111 that displaces a vibration region (vibration plate) 130 of the diaphragm member 103, a common liquid chamber member 120 that also serves as a frame member of the head, and a cover 129 are provided. A portion constituted by the flow path plate 102 and the vibration plate member 103 is referred to as a flow path member 140.

  The nozzle plate 101 has a plurality of nozzles 104 that discharge liquid.

  The flow path plate 102 forms an individual liquid chamber 106 that communicates with the nozzle 104 via the nozzle communication path 105, a supply-side fluid resistance portion 107 that communicates with the individual liquid chamber 106, and a supply-side introduction portion 108 that communicates with the supply-side fluid resistance portion 107. doing. The nozzle communication path 105 is a flow path that communicates with the nozzle 104 and the individual liquid chamber 106 respectively. The supply side introduction unit 108 communicates with the supply side common liquid chamber 110 through a supply side opening 109 provided in the diaphragm member 103.

  The vibration plate member 103 has a deformable vibration region 130 that forms a wall surface of the individual liquid chamber 106 of the flow path plate 102. Here, the diaphragm member 103 has a two-layer structure (not limited), and is formed of a first layer that forms a thin portion and a second layer that forms a thick portion from the flow path plate 102 side. A deformable vibration region 130 is formed in a portion corresponding to the individual liquid chamber 106.

  A piezoelectric actuator 111 including an electromechanical conversion element as a driving means (actuator means, pressure generating means) for deforming the vibration region 130 of the diaphragm member 103 on the opposite side of the diaphragm member 103 from the individual liquid chamber 106. Is arranged.

  In this piezoelectric actuator 111, a piezoelectric member joined on a base member 113 is grooved by half-cut dicing to form a required number of columnar piezoelectric elements 112 in a comb-like shape at a predetermined interval.

  And the piezoelectric element 112 is joined to the convex part 130a which is an island-like thick part formed in the vibration area 130 of the diaphragm member 103. A flexible wiring member 115 is connected to the piezoelectric element 112.

  The common liquid chamber member 120 forms a supply side common liquid chamber 110 and a discharge side common liquid chamber 150. The supply side common liquid chamber 110 communicates with the supply port 171, and the discharge side common liquid chamber 150 communicates with the discharge port 172.

  Here, the common liquid chamber member 120 is constituted by a first common liquid chamber member 121 and a second common liquid chamber member 122, and the first common liquid chamber member 121 is placed on the diaphragm member 103 side of the flow path member 140. The second common liquid chamber member 122 is laminated and bonded to the first common liquid chamber member 121.

  The first common liquid chamber member 121 includes a downstream common liquid chamber 110A that is a part of the supply-side common liquid chamber 110 that communicates with the supply-side introduction unit 108, and a discharge-side common liquid chamber 150 that communicates with the discharge-side individual flow path 156. Is forming. The second common liquid chamber member 122 forms an upstream common liquid chamber 110 </ b> B that is the remaining part of the supply side common liquid chamber 110.

  Further, the flow path plate 102 forms a discharge side fluid resistance portion 157, a discharge side individual flow path 156, and a discharge side lead-out portion 158 communicating with each individual liquid chamber 6 via the nozzle communication path 105.

  The discharge side lead-out portion 158 communicates with the discharge side common liquid chamber 150 through a discharge side opening 159 provided in the diaphragm member 103.

  In this liquid ejection head, for example, the voltage applied to the piezoelectric element 112 is lowered from the reference potential (intermediate potential), so that the piezoelectric element 112 contracts, and the vibration region 130 of the diaphragm member 103 is drawn, so that the volume of the individual liquid chamber 106 is increased. As the liquid expands, the liquid flows into the individual liquid chamber 106.

  Thereafter, the voltage applied to the piezoelectric element 112 is increased to extend the piezoelectric element 112 in the stacking direction, and the vibration region 130 of the diaphragm member 103 is deformed in the direction toward the nozzle 104 to contract the volume of the individual liquid chamber 106. As a result, the liquid in the individual liquid chamber 106 is pressurized, and the liquid is discharged from the nozzle 104.

  Further, the liquid not discharged from the nozzle 104 passes through the nozzle 104 and is discharged from the discharge side fluid resistance portion 157, the discharge side individual flow path 156, the discharge side derivation portion 158, and the discharge side opening 159 to the discharge side common liquid chamber 150. Then, the liquid is supplied again from the discharge side common liquid chamber 150 to the supply side common liquid chamber 110 through an external circulation path.

  Even when the liquid ejection operation for ejecting liquid from the nozzle 104 is not performed, the supply side opening 109, the supply side introduction unit 108, the supply side fluid resistance unit 107, and the individual liquid chamber 106 are supplied from the supply side common liquid chamber 110. The discharge side fluid resistance portion 157, the discharge side individual flow path 156, the discharge side derivation portion 158, and the discharge side opening 159 are discharged to the discharge side common liquid chamber 150 through the external circulation path. It is supplied again to the supply side common liquid chamber 110.

  Note that the driving method of the head is not limited to the above example (drawing-pushing), and it is also possible to perform striking or pushing depending on the direction to which the drive waveform is given.

  Next, an example of the liquid circulation device in the printing apparatus 1 will be described with reference to FIG. FIG. 5 is a block diagram for explaining the liquid circulation apparatus.

  The liquid circulation apparatus 200 includes a supply tank 201 that is a first sub tank configured with the liquid storage container according to the present invention, and a recovery tank 202 that is a second sub tank configured with the liquid storage container according to the present invention. .

  The liquid circulation device 200 includes an intermediate tank 203 that is a third tank and a liquid cartridge 204 that is a main tank that stores the liquid 300 discharged from the head 100.

  The liquid circulation device 200 includes a supply pump 205 that is a first liquid feed pump and a recovery pump 206 that is a second liquid feed pump.

  The liquid circulation apparatus 200 includes a first manifold (common supply path) 212 that communicates with the supply ports 171 of the plurality of heads 100 via individual supply paths 211. The liquid circulation apparatus 200 includes a second manifold (common recovery path) 222 that communicates with the discharge ports 172 of the plurality of heads 100 via individual recovery paths 221.

  The supply pump 205 sends liquid from the intermediate tank 203 to the supply tank 201 via the liquid path 231, and the liquid is supplied from the supply tank 201 to the first manifold 212.

  The recovery pump 206 sends liquid from the recovery tank 202 to the intermediate tank 203 via the liquid path 232, and the liquid is recovered from the second manifold 212 to the recovery tank 202.

  The first manifold 212 is provided with a pressure sensor 241, and the second manifold 222 is provided with a pressure sensor 251.

  The controller 260 drives and controls the supply pump 205 and the recovery pump 206 based on the detection results of the pressure sensors 241 and 251 to perform pressure formation for supplying with positive pressure and performing recovery with negative pressure.

  As a result, the liquid path 231, the supply tank 201, the first manifold 212, the individual supply path 211, the above-described flow paths (the supply side common liquid chamber 110, the individual liquid chamber 106, the discharge flow from the intermediate tank 203 to the inside of the head 100. Path 151, discharge side common liquid chamber 150, etc.), individual recovery path 221, second manifold 222, recovery tank 202, liquid path 231, and circulation path through which the liquid is circulated through intermediate tank 203 is configured.

  Next, the liquid container according to the first embodiment of the present invention will be described with reference to FIGS. 6 is an explanatory front view of the liquid container, FIG. 7 is an explanatory side sectional view, and FIG. 8 is an explanatory view of a fixing surface of the container main body and the lid member. In FIG. 6, the lid member is shown in a transparent state.

  The liquid storage container 400 includes a tank body 402 that is a container body having a recess 402 a that forms a liquid storage portion 401 that stores a liquid, and a lid member 403 that closes the opening of the recess 402 a of the tank body 402. The tank body 402 and the lid member 403 are sealed and fixed via a seal member 404.

  When viewed from the direction in which the lid member 403 is attached to the tank body 402 (hereinafter referred to as “axial direction”), the liquid storage portion 401 formed by the recess 402a of the tank body 402 has a circular shape as shown in FIG. doing.

  The outer shape of the tank body 402 and the lid member 403 is also circular according to the shape of the liquid container 401, but if the liquid container 401 is circular, the outer shape of the tank body 402 and the lid member 403 is It does not have to be circular.

  In addition, the liquid storage portion 401 may have a polygonal shape, preferably an octagon or more, when viewed from the axial direction. If it is an octagon or more, when arranged around the transport drum, at least four (four colors) liquid storage containers 400 can be disposed as sub-tanks above the axis of the transport drum 21.

  Further, the outer shape of the liquid container 400 constituted by the tank body 402 and the lid member 403 is a disc shape (thin cylindrical shape). By making the outer shape of the liquid container 400 into a disk shape, it can be overlapped in the normal direction of the flat surface of the disk, so that the arrangement space can be saved.

  The tank body 402 is attached with tubes 406 (406A, 406B), which are two flow path members communicating with the liquid storage unit 401, sealed by a seal member 407.

  Here, the two tubes 406 </ b> A and 406 </ b> B are arranged radially in the liquid container 401 as viewed from the axial direction, and extend to the vicinity of the center beyond the center of the liquid container 401. In addition, although it does not reach the center part of the liquid storage part 401, it can also be set as the structure extended to the center part vicinity.

  On the other hand, two liquid level detection members 408A and 408B for detecting the liquid level in the liquid storage unit 401 are attached to the lid member 403.

  Here, the lid member 403 is rotatable relative to the tank body 402, and the relative positional relationship between the arrangement direction of the two liquid level detection members 408 and the extending direction of the two tubes 406 can be changed. it can.

  That is, for example, as shown in FIG. 8, screw holes 411 are provided around the tank main body 402 at a predetermined angle, and screw holes 412 are also provided around the lid member 403 at a predetermined angle. And the tank body 402 can be rotated to change and fix the relative positions of the two.

  Next, the operation of the liquid container configured as described above will be described with reference to FIG. FIG. 9 is an explanatory front view illustrating the posture of the liquid container different from FIG.

  First, the liquid storage part 401 of the liquid storage container 400 is circular, and the tubes 406A and 406B, which are two flow path members, are arranged extending radially from the vicinity of the center of the liquid storage part 401 toward the peripheral surface. ing.

  Therefore, for example, as shown in FIG. 6, even when the tube 406A of the tank main body 402 is arranged in the vertical direction (vertical direction), as shown in FIG. Even when the posture is arranged obliquely with respect to the (vertical direction), the opening of the distal end portion of the tube 406 is located in the vicinity of the center portion of the liquid storage portion 401.

  Thereby, even if the posture of the liquid container 400 changes, the liquid level in the liquid container 401 does not change, so that the opening (inlet, outlet) of the tube 406 can be immersed in the liquid. Inflow and outflow of liquid can be performed stably.

  Next, the liquid storage container 400 rotates the lid member 403 relative to the tank main body 402 so that the relative positional relationship between the direction in which the two liquid level detection members 408 are aligned and the direction in which the two tubes 406 are extended. Can be changed.

  Therefore, as shown in FIG. 6, when the liquid container 400 is in a posture in which the tube 406A of the tank body 402 is arranged in the vertical direction (vertical direction), the two liquid level detection members 408A and 408B are in the vertical direction ( (Vertical direction).

  On the other hand, as shown in FIG. 9, even when the liquid container 400 is in a posture in which the tubes 406 </ b> A and 406 of the tank main body 402 are arranged obliquely with respect to the vertical direction, the lid member 403 is attached to the tank main body 402. The two liquid level detection members 408A and 408B can be arranged in the vertical direction (vertical direction).

  Thereby, even if the arrangement posture of the liquid container 400 changes, the heights of the two liquid level detection members 408 from the bottom of the circular liquid container 401 can be made the same, and the liquid level can be accurately set. Can be detected.

  Next, an arrangement example of a discharge unit including the liquid storage container according to the present embodiment as a sub tank will be described with reference to FIG. FIG. 10 is an explanatory diagram for explaining a state in which the discharge unit is arranged around the transport drum.

  Here, the discharge unit 23 unitizes the manifold 282 including the first manifold 212 and the second manifold 222 described above, the supply tank 201 and the recovery tank 202 configured by the liquid storage container 400, and the head 100 described above. .

  The four discharge units 23 (23A to 23D) are arranged around the transport drum 21 at a predetermined mounting angle. At this time, the supply tank 201 and the recovery tank 202 are configured by the liquid storage container 400. Therefore, even if they are inclined around the transport drum 21, the tips of the tube 406A (connected to the first manifold 212 and the second manifold 222) and the tube 406B (connected to the supply pump 205 and the recovery pump 206) Can be immersed in liquid.

  Thereby, the same liquid container 400 can be used for the four discharge units 23 having different attachment angles (arrangement angles).

  Further, even if the posture of the liquid container 400 changes, the heights of the two liquid level detection members 408 from the bottom of the circular liquid container 401 can be made the same, so the mounting angle of the discharge unit 23 The liquid level can be accurately detected by changing the attachment angle (rotation angle) of the lid member 403 with respect to the tank main body 402 according to the (arrangement angle).

  Thus, the same liquid container 400 can be used for the four discharge units 23 having different attachment angles (arrangement angles), and the versatility of the liquid container can be improved.

  Here, the liquid container of the comparative example will be described with reference to FIGS. 11 and 12. FIG. 11 is an explanatory front view of the liquid container, and FIG. 12 is an explanatory side sectional view. In addition, the same code | symbol is attached | subjected and demonstrated to the part corresponding to the liquid container which concerns on this embodiment.

  In the liquid container of this comparative example, a tank body 402 having an open top forms a prismatic liquid container 401, and the opening of the tank body 402 is closed by a lid member 403. Then, two tubes 406 are arranged extending from the lid member 403 as flow path members in the vertical direction, and similarly, the liquid level detection member 408 is held by the lid member 403.

  A different example in which the discharge unit 23 in which the liquid container of the comparative example is applied to the supply tank 201 and the recovery tank 202 is arranged around the transport drum 21 at a predetermined angle will be described with reference to FIGS. 13 and 14. FIG. 13 and FIG. 14 are explanatory views for explaining the same.

  First, FIG. 12 is an example in which the same one is used as the four discharge units 23A to 23D. In this case, the tank body 402 of the liquid container is inclined according to the mounting angle.

  As the tank body 402 is tilted in this way, the liquid storage portion 401 is also inclined, and the liquid level of the liquid stored in the liquid storage portion 401 is different even if the liquid amount is the same. For this reason, the distal end portion of the tube 406 does not reach the liquid, bubbles enter and are sent to the head, and there is a high possibility that ejection failure will occur.

  Further, the supply tank 201 and the recovery tank 202 have a role of accumulating pressure applied to the supply port 171 and the discharge port 172 of the head 100, and the amount of air in the liquid storage unit 401 must be managed.

  However, since the liquid storage unit 401 is inclined, the liquid level detected by the liquid level detection member 408 also varies depending on the arrangement angle, and the amount of air in the liquid storage unit 401 cannot be managed.

  Therefore, as shown in FIG. 13, the four discharge units 23A to 23D can be individually unitized so that the tank main body 402 of the liquid container is disposed at the same angle with respect to the horizontal.

  However, in this configuration, the fixing parts for fixing the flow path member and the liquid storage member to the manifold and the like are different in each discharge unit 23, the configuration becomes complicated, and the flow path member and the like can be shared. Disappear.

  Next, a liquid container according to a second embodiment of the present invention will be described with reference to FIG. FIG. 15 is an explanatory front view of the liquid container.

  In the present embodiment, the flow path member 416 is provided integrally with the tank main body 402, and the tube 406 is connected to the flow path member 416 outside the tank main body 402.

  If comprised in this way, the position of the front-end | tip part (inflow port or outflow port) of the flow-path member in the liquid storage part 401 will be stabilized.

  Next, a liquid container according to a third embodiment of the present invention will be described with reference to FIG. FIG. 16 is an explanatory front view of the liquid container.

  In the present embodiment, when viewed from the axial direction, the liquid storage portion 401 has a polygonal shape (here, a hexagonal shape).

  Even in this configuration, the lid member 403 can change the fixing position every 22.5 °. Therefore, if, for example, four discharge units 23 arranged around the transport drum 21 are arranged every 22.5 °, The liquid level height detected by the liquid level detection member 408 of each discharge unit 23 can be made the same.

DESCRIPTION OF SYMBOLS 1 Printing apparatus 10 Carry-in part 20 Printing part 21 Conveyance drum 22 Liquid discharge part 100 Head 200 Liquid circulation apparatus 201 Supply tank (liquid storage container)
202 Recovery tank (liquid container)
400 Liquid container 401 Liquid container 402 Tank body (container body)
403 Lid member 406 Tube (flow path member)
408 Liquid level detection member 416 Flow path member

Claims (9)

A liquid storage container for storing a liquid to be supplied to a liquid discharge head,
A container body that forms a liquid storage portion for storing the liquid;
Two flow path members communicating with the liquid storage portion,
The liquid container according to claim 2, wherein the two flow path members are arranged radially in the liquid container. A liquid storage container for storing a liquid to be supplied to a liquid discharge head,
A container body that is open at one side to form a liquid container for containing the liquid;
A lid member for closing the opening of the container body,
Two flow path members communicating with the liquid container are attached to the container body,
A liquid level detection member for detecting the liquid level in the liquid storage portion is attached to the lid member,
The liquid storage container, wherein the lid member is rotatable with respect to the container body. The liquid container according to claim 2, wherein the two flow path members are arranged radially in the liquid container. 4. The liquid container according to claim 2, wherein the lid member is disposed so as to be rotated with respect to the container main body by the same angle as an attachment angle of the liquid ejection head. 5. The liquid container according to claim 1, wherein the two flow path members extend to the vicinity of the center of the liquid container. The liquid container according to claim 1, wherein the liquid container of the container body is circular or polygonal. A liquid discharge head for discharging liquid;
An apparatus for ejecting liquid, comprising: the liquid container according to claim 1. A plurality of the liquid ejection heads;
A plurality of the liquid containers;
A transport drum that transports a sheet-like member to which the liquid discharged from the liquid discharge head is applied,
The apparatus for discharging a liquid according to claim 7, wherein the liquid discharge head and the liquid storage container are respectively arranged radially with respect to a peripheral surface of the transport drum. The apparatus for ejecting liquid according to claim 7 or 8, wherein the liquid ejection head is a flow-through type head.

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