[0001]The present invention relates to a printing apparatus and a printing method.
BACKGROUND
[0002]Printing apparatus for printing by applying an ink onto a recording medium have been conventionally used (for example, see Patent Document 1). The printing apparatus according to Patent Document 1 includes a head main body having nozzles for ejecting ink, a reservoir unit for storing ink, a supply passage connecting the nozzle and the reservoir means, provided in the middle of the supply channel It was and a filter.
[0003]
　In the ink flowing down the supply channel, for example, be removed foreign matter precipitates and dirt of ink is trapped by the filter. Thus, the foreign matter is the is prevented discharged from the nozzle.
[0004]
　Filter, accumulate foreign matter him to continue to capture the foreign matter, may cause clogging. For this reason, when the foreign matter is accumulated in the filter, it is necessary to replace the filter to a new filter.
[0005]
　However, in the printing device described in Patent Document 1, when replacing the filter, once it is necessary to interrupt the printing if it is being printed. In this case, the printing efficiency is lowered.
CITATION
Patent Document
[0006]
Patent Document 1: JP 2007-296660 JP
Summary of the Invention
Problems that the Invention is to Solve
[0007]
　An object of the present invention, the printing efficiency is to provide a printing apparatus and a printing method can be prevented.
Means for Solving the Problems
[0008]
　These objects are achieved by the present invention described below.
　The printing device of the present invention, a reservoir for storing ink,
　the is supplied the ink from the reservoir, and a discharge unit that performs printing by ejecting supplied the ink,
　and the discharge portion and the storage portion connect, and an ink passage the ink flows down toward the discharge portion from said reservoir,
　said ink flow path includes a first flow path, provided in the first flow path, said first a first filter for trapping foreign matter of the ink passing through the flow path, a second flow path that is independent of the first flow path, a second filter for trapping foreign matter of the ink passing through the second flow path When it has,
　based on a predetermined condition, wherein the ink is configured to be switchable whether to pass either of the flow path of said first flow path and the second flow path .
[0009]
　Thus, for example, if the clogging in the first filter occurs during use of the first flow path, prevented by switching the flow path to be used from the first passage to the second flow path, the printing is to interrupt can do. Further, it is possible to first by switching the second flow path, replacing the first filter while the passage blocked the ink in the first flow path even during printing.
[0010]
　Thus, according to the present invention, it is possible to continue printing even if clogging on one of the filter. Therefore, it is possible that the printing efficiency be prevented.
[0011]
　In the printing apparatus of the present invention, the ink passage is preferably branched into the first passage and the second flow path on the way.
[0012]
　Thus, for example, may be first and second channels are compared with a configuration that is independent over the entire length in the longitudinal direction, to simplify the configuration of the ink flow path.
[0013]
　In the printing apparatus of the present invention, the ink flow path is preferably are joined at the downstream side of the branch point of the second flow path and the first flow path.
[0014]
　Thus, for example, may be first and second channels are compared with a configuration that is independent over the entire length in the longitudinal direction, to simplify the configuration of the ink flow path.
[0015]
　In the printing apparatus of the present invention, the first filter is detachable from the first flow path, the second filter is preferably detachable from said second flow path.
[0016]
　This makes it possible to replace the filter of the first filter and second filter, respectively new.
[0017]
　In the printing apparatus of the present invention, the first flow path is detachable by the first filter,
　said second flow path is preferably detachable by the second filter.
[0018]
　Thus, from the first filter or second filter is replaced with a new filter can be easily performed.
[0019]
　In the printing apparatus of the present invention, the ink flow path, of the ink flow path than said first filter and said second filter provided on the upstream side, the upstream side pressure detecting the pressure of the ink flow path a detecting unit,
　among the ink flow path than said first filter and said second filter provided on the downstream side, preferably has a a downstream pressure detection portion for detecting a pressure of the ink flow path .
[0020]
　Thus, it is possible to detect the pressure of the first filter and the upstream side of the second filter, and a pressure downstream of the first filter and the second filter.
[0021]
　In the printing apparatus of the present invention, the pressure which the upstream pressure detection portion detects, on the basis on the downstream pressure the pressure detecting section detects, for switching between the second flow path and the first flow path preference is.
[0022]
　Thus, it is possible to know the replacement timing of the first filter and second filter exactly.
[0023]
　In the printing apparatus of the present invention, includes the discharge portion has a movable portion movable in performing the printing,
　the first filter and the second filter is preferably moved together with the movable portion.
[0024]
　This makes it possible immediately to capture foreign matter generated by the moving unit in the first filter or second filter.
[0025]
　In the printing apparatus of the present invention, the replacement of the first filter or the second filter is preferably the printing is performed while stopped.
　Thus, the worker can perform the replacement operation easily.
[0026]
　In the printing apparatus of the present invention includes the discharge portion has a movable portion movable in performing the printing,
　the first filter and the second filter, regardless of the movement and stop of the movable portion, preferably, the movement is restricted.
　Thus, even also in press stopped even during printing, it is possible to perform the replacement work.
[0027]
　In the printing apparatus of the present invention, replacement of the first filter or the second filter, the printing in or the printing is preferably performed while stopped.
　Thus, the worker can perform the replacement operation easily.
[0028]
　In the printing apparatus of the present invention is connected to the first flow path and the second flow path preferably has a disposal passage for discharging the ink of the first flow path and the second flow path.
[0029]
　Accordingly, when performing the replacement can be a first flow path or the second flow path to an empty state.
[0030]
　In the printing apparatus of the present invention, respectively provided in the first flow path and the second flow path preferably has a degassing unit for degassing the first flow path and the second flow path.
　This makes it possible to remove bubbles of the first flow path and second flow path.
[0031]
　Printing method of the present invention includes a reservoir for storing ink, the is supplied the ink from the reservoir, and a discharge unit that performs printing by ejecting supplied the ink, and the discharge portion and the storage portion connect, and an ink passage the ink flows down toward the discharge portion from said reservoir, said ink flow path includes a first flow path, provided in the first flow path, said first a first filter for trapping foreign matter of the ink passing through the flow path, a second flow path that is independent of the first flow path, a second filter for trapping foreign matter of the ink passing through the second flow path When, a printing method for printing using a printing apparatus having,
　a printing step of performing the printing,
　in the printing process, based on a predetermined condition, the ink is the first passage and the second switching of switching whether to pass either of the flow path of the flow path And having a step.
[0032]
　Thus, for example, if the clogging in the first filter occurs during use of the first flow path, prevented by switching the flow path to be used from the first passage to the second flow path, the printing is to interrupt can do. Further, it is possible to first by switching the second flow path, replacing the first filter while the passage blocked the ink in the first flow path even during printing.
[0033]
　Thus, according to the present invention, it is possible to continue printing even if clogging on one of the filter. Therefore, it is possible that the printing efficiency be prevented.
BRIEF DESCRIPTION OF THE DRAWINGS
[0034]
FIG. 1 is a side view schematically showing a first embodiment of a printing apparatus of the present invention.
It is a block diagram of a printing apparatus shown in FIG. 1; FIG.
[Figure 3] A partially enlarged schematic view of the ink flow path printing apparatus comprising shown in FIG. 1 is a diagram showing a state where the ink is flowing down the first flow path.
[Figure 4] A partially enlarged schematic view of the ink flow path printing apparatus comprising shown in FIG. 1 is a diagram showing a state where the ink is switched to flow down the second flow path.
[5] A partially enlarged schematic view of the ink flow path printing apparatus comprising shown in FIG. 1 is a diagram showing a state of being detached through the first flow passage.
[6] A partially enlarged schematic view of the ink flow path printing apparatus comprising shown in FIG. 1 is a diagram showing a state of being disengaged first filter.
[7] A partially enlarged schematic view of the ink flow path printing apparatus comprising shown in FIG. 1, showing a state after replacing the first filter to a new filter.
A [8] a partial enlarged schematic view of the ink flow path printing apparatus comprising shown in FIG. 1 is a diagram showing a state in which the first flow path is mounted.
9 is a flowchart showing the control operation of the control unit that the printing apparatus has shown in FIG.
[Figure 10] A partial enlarged schematic view of an ink flow path provided in the second embodiment of the printing apparatus of the present invention, showing a state where the ink is flowing down the first flow path.
[Figure 11] A partial enlarged schematic view of the ink flow path printing apparatus comprising shown in FIG. 10 is a diagram showing a state where the ink is switched to flow down the second flow path.
[Figure 12] A partial enlarged schematic view of the ink flow path printing apparatus comprising shown in FIG. 10 is a diagram showing a state in which replacing the first filter to a new filter.
[Figure 13] A partial enlarged schematic view of the ink flow path printing apparatus comprising shown in FIG. 10 is a diagram illustrating the supply of ink to the first flow path.
14 is a partially enlarged schematic view of an ink flow path provided in the third embodiment of the printing apparatus of the present invention.
Is a diagram showing FIG. 15 degassing unit in which the ink flow path is provided as shown in FIG. 14.
DESCRIPTION OF THE INVENTION
[0035]
　It will be described in detail with reference to a preferred embodiment of a printing apparatus and a printing method of the present invention with reference to the accompanying drawings.
[0036]
　
　FIG 1 is a side view schematically showing a first embodiment of a printing apparatus of the present invention. Figure 2 is a block diagram of the printing apparatus shown in FIG. Figure 3 is a partial enlarged schematic view of the ink flow path printing apparatus comprising shown in FIG. 1 is a diagram showing a state where the ink is flowing down the first flow path. Figure 4 is a partially enlarged schematic view of the ink flow path printing apparatus comprising shown in FIG. 1 is a diagram showing a state where the ink is switched to flow down the second flow path. Figure 5 is a partially enlarged schematic view of an ink flow path provided in the printing apparatus shown in FIG. 1 is a diagram showing a state of being detached through the first flow passage. Figure 6 is a partial enlarged schematic view of an ink flow path provided in the printing apparatus shown in FIG. 1 is a diagram showing a state of being disengaged first filter. Figure 7 is a partially enlarged schematic view of an ink flow path provided in the printing apparatus shown in FIG. 1 is a diagram showing a state in which replacing the first filter to a new filter. Figure 8 is a partially enlarged schematic view of the ink flow path printing apparatus comprising shown in FIG. 1 is a diagram showing a state in which the first flow path is mounted. Figure 9 is a flowchart showing the control operation of the control unit included in the printing apparatus shown in FIG.
[0037]
　In the following, for convenience of explanation, in FIG. 1, a three axes perpendicular to each other, are illustrated x-axis, y-axis and z-axis. x-axis is an axis along one direction of the horizontal direction, the width of the printing device, i.e., the axis along the depth direction in FIG. y-axis is a horizontal direction, perpendicular to the x-axis, i.e., the axis along the longitudinal direction of the printing device. z-axis, the vertical direction, i.e., the axis along the vertical direction. Further, "positive" or "+ side" the leading ends of the arrows shown, the base end side "negative" or - a "side". Further, the upper side in FIG. 1 referred to as "upper (upward)" refers to lower the "lower (downward)".
　Further, in this specification, that the ink is directed from the upstream side to the downstream side referred to as "ink flows down" direction in which the ink flows down may not necessarily coincide with the direction of gravity. That is, even if the direction and the gravity direction in which ink flows down match, even if they do not match, means that the ink flows as "flow-down".
[0038]
　Printing apparatus 1 shown in FIG. 1 includes a reservoir 11 for storing ink 100, the ink 100 is supplied from the storage unit 11, a printing unit 13 serving as a discharging unit that performs printing by ejecting ink supplied 100, connects the reservoir 11 and the printing portion 13, the ink 100 toward the printing unit 13 comprises a an ink flow path 16 flowing down from the storage unit 11.
[0039]
　Further, the ink flow path 16 includes a first branch channel 163 as the first flow path, provided in the first branch passage 163, a filter 168 for trapping foreign matter in the ink 100 passing through the first branch passage 163 When, and a second branch channel 164 and the first branch passage 163 is independent, a filter 169 for trapping foreign matter in the ink 100 passing through the second branch channel 164, a.
[0040]
　In the printer 1, based on a predetermined condition, the ink 100 is configured to be capable of switching whether to pass either of the flow path of the first branch channel 163 and a second branch channel 164.
[0041]
　According to such a printing apparatus 1, for example, if the clogging in the filter 168 while using the first branch passage 163 has occurred, the flow path to be used from the first branch flow passage 163 second branch channel 164 by switching the printing can be prevented from being interrupted. Further, by switching to the second branch channel 164, it is possible to replace the filter 168 with a new filter in a state of passing blocked the ink in the first branch passage 163 even during printing.
[0042]
　It will be described in detail below each section of the printing apparatus 1.
　1, the printing apparatus 1 includes a machine frame 10, a storage unit 11, a printing unit 13 that performs printing by ejecting ink 100 supplied from the reservoir 11 to the workpiece W as a recording medium, an ink flow path 16 connecting the reservoir 11 and the printing section 13, a conveying unit 12 for conveying the workpiece W, a drying unit 2 to dry the ink 100 on the work W, the lift mechanism 14, a control unit 15 , and a.
[0043]
　In the present embodiment, the direction is the x-axis direction orthogonal to the conveying direction for conveying the workpiece W, the direction to a direction parallel to the conveying direction orthogonal to the y-axis direction, x-axis and y-axis directions is a z-axis direction.
[0044]
　Reservoir 11 serves to independently storing each other ink 100 for each color. The ink 100 contained a dye or pigment as a coloring agent in water as solvent, for example, cyan, magenta, yellow, four colors of black.
[0045]
　Conveying section 12 includes a feeding device 3 for feeding the workpiece W long wound into a roll, a winding device 4 for winding the printed workpiece W, is disposed on the machine base 10, at the time of printing and a support device 5 for supporting the workpiece W.
[0046]
　Feeding device 3 sends the upstream side of the workpiece W from the machine base 10, i.e., are arranged in the y-axis direction upstream side. Feeding device 3, the workpiece W is wound into a roll, and sending roller 31 sends out the workpiece W, delivery and a tensioner 32 for applying tension to the work W between the supporting device 5 and the rollers 31 ing. Delivery roller 31, a motor (not shown) is connected can be rotated by the operation of the motor.
[0047]
　As the workpiece W, it is possible to use the material to be printed. The material to be printed, fabric or as a target of printing, clothing and, refers to such other apparel products. The fabrics, cotton, silk, natural fibers and chemical fibers such as nylon or woven composite fibers obtained by mixing these like wool, knitted, include nonwoven fabrics. In addition, clothing and, other of the clothing products, T-shirts after sewing, handkerchiefs, scarves, towels, carrier bags, cloth bags, curtains, sheets, other such as furniture such as bed cover, parts of sewing before the state fabrics such as before and after cutting present also included as.
[0048]
　As the workpiece W, in addition to the above material to be printed, plain paper, it can be used high quality paper, and ink-jet recording special paper or the like, such as glossy paper. As the workpiece W, for example, no surface treatment for ink jet printing, i.e., a plastic film that does not form an ink absorbing layer, and those plastic is coated on a substrate such as paper and plastics film can also be used those which are bonded. As the plastic, but are not limited to, for example, polyvinyl chloride, polyethylene terephthalate, polycarbonate, polystyrene, polyurethanes, polyethylene, and polypropylene.
[0049]
　Winding device 4, to the feeding device 3, the downstream side in the transport direction of the workpiece W than the machine frame 10, i.e., are arranged in the y-axis direction downstream side. Winding device 4 includes a winding roller 41 for winding the workpiece W into a roll tensioner 42 applying tension to the work W between the supporting device 5 and the take-up roller 41, a tensioner 43 and the tensioner 44 ing. Winding roller 41, a motor (not shown) is connected can be rotated by the operation of the motor. Tensioner 42 to the tensioner 44 is located at each of the intervals in this order in a direction away from the winding roller 41.
[0050]
　Supporting device 5 is disposed between the feeding device 3 and the winding device 4. Supporting device 5, a main driving roller 51 and driven roller 52 which are spaced from each other in the y-axis direction, is stretched and the main driving roller 51 and driven roller 52, an endless belt 53 for supporting the workpiece W on the upper surface, main drive and a tensioner 54 and the tensioner 55 applying tension to the work W between the roller 51 and the driven roller 52.
[0051]
　Main driving roller 51, a motor (not shown) is connected can be rotated by the operation of the motor. The driven roller 52 may be a rotational force of the driving roller 51 via the endless belt 53 is transmitted to rotate in conjunction with the main driving roller 51.
[0052]
　The endless belt 53 is a belt adhesive layer formed with an adhesive to the surface of the front side. Some of the work W in the adhesive layer is adhesive fixed, is conveyed in the y-axis direction. Then, during this transport, so that the print on the workpiece W is performed. Moreover, after the printing has been performed, the workpiece W is separated from the endless belt 53.
[0053]
　Tensioners 54 and tensioner 55, like the main driving roller 51 and driven roller 52 are arranged spaced from each other in the y-axis direction.
[0054]
　Tensioner 54 may sandwich the workpiece W and the endless belt 53 your between the main driving roller 51, the tensioner 55 can sandwich the workpiece W and the endless belt 53 your between the driven roller 52. Accordingly, the workpiece W which tension is applied by the tensioner 54 and the tensioner 55 is conveyed and is fixed to left endless belt 53 in a state where the tension is applied. Such a state, the workpiece W is reduced to or closer, for example, wrinkles or the like during transport, therefore, when subjected to printing, the printing is accurate and high quality.
[0055]
　Such transport unit 12, the control unit 15 is electrically connected to the As shown in FIG. 2, the operation is controlled.
[0056]
　Printing unit 13 includes a carriage unit 132 having a plurality of nozzles 131 which performs recording by printing by ejecting ink 100 on the workpiece W, and X-axis table (not shown) for movably supporting the carriage unit 132 in the x-axis direction It is equipped with a.
[0057]
　The printing unit 13 includes a piezoelectric element corresponding to each nozzle 131, the ink 100 from the nozzles 131 to the voltage to the piezoelectric element is applied is discharged as droplets. Such printing unit 13, the control unit 15 is electrically connected to, its operation is controlled.
[0058]
　In the printer 1, in the y-axis direction in a fixed state where the adhesive fixing the Repetitive out the workpiece W by the feeding device 3 in the endless belt 53, thereby intermittently feeding the sub-scanning, the workpiece W in a fixed state, the carriage unit 132 the x-axis direction, for ejecting ink 100 from nozzle 131 while reciprocating the main scan. This printing is completed it can be carried out until the image pattern is formed on the workpiece W. Note that the image pattern may be by multi-color printing may be by single color printing.
[0059]
　Lifting mechanism shown in FIG. 1 14 can adjust the height of the nozzle 131. The lifting mechanism 14, for example, can be configured to have a motor and a ball screw and linear guide. In addition, this motor, encoder is built. It is possible to detect the height of the nozzle 131 based on the rotation amount detected by the encoder. Such lifting mechanism 14 also, as shown in FIG. 2, is electrically connected to the control unit 15, the operation is controlled.
[0060]
　As shown in FIG. 1, the drying unit 2, a conveyance direction downstream side of the workpiece W than the printing unit 13 is disposed between the take-up roller 41 of the supporting device 5 and the winding device 4.
[0061]
　Drying section 2 has a chamber 21 and a coil 22 disposed in the chamber 21. Coil 22 is formed by, for example, a nichrome wire, a heating element which generates heat by supplying electric power. By heat generated in the coil 22, it may be to dry the ink 100 on the workpiece W passing through the chamber 21.
[0062]
　2, the control unit 15 includes a CPU (Central Processing Unit) 151, a storage unit 152.
[0063]
　CPU151 executes the program for various processes such as the print process as described above.
　Storage unit 152 has, for example, a EEPROM (Electrically Erasable Programmable Read-Only Memory) or the like which is a kind of nonvolatile semiconductor memory capable of storing various programs.
[0064]
　Notification unit 300, as described later, to notify that the clogging occurs in the filter 168 or filter 169. Notification unit 300 is, for example, a buzzer, a monitor, and a lamp. As a result, it is possible to encourage the replacement of the filter 168 or filter 169 to the worker.
[0065]
　It will now be described ink flow path 16.
　Ink channel 16 connects the reservoir 11 and the nozzle 131. Also, within the ink flow path 16, the ink 100 flows down toward the reservoir 11 to the nozzle 131.
[0066]
　The ink flow path 16, the upstream channel 161, the downstream channel 162, a first branch flow passage 163 of the first flow path, a second branch flow path 164 of the second flow path, the sub-reservoir and parts 165, a valve 166, a valve 167, a filter 168 as a first filter, a filter 169 as a second filter, and an analyzer pressure gauge 17, and a test manometer 18.
[0067]
　Upstream channel 161 is located in the storage unit 11 side. Downstream-passage 162 is located on the nozzle 131 side. The first branch channel 163 and a second branch channel 164 is positioned between the upstream side channel 161 and the downstream channel 162. That is, the ink flow path 16 is branched from the first branch channel 163 and a second branch channel 164 in the middle and downstream of the branch point of the first branch channel 163 and the second branch passage 164 They are joined on the side. According to such a configuration, for example, compared to the switches and connection configuration the reservoir 11 and the nozzle 131 with two separate flow paths, or can reduce the number of switching valves, reservoir 11 and the nozzle 131, it is possible to reduce the number of connection portions between the ink flow path 16. Therefore, it is possible to simplify the device configuration of the printing apparatus 1.
[0068]
　Incidentally, as shown in FIGS. 5-7, the first branch passage 163 to the valve 167 is a valve 166 and the confluence is a branch point, and is configured to be each filter 168 detachably. Further, in FIGS. 5-7, it is illustrated a state of being disengaged first branch channel 163, the second branch channel 164, similarly to the first branch channel 163, valve 166 and 167 against, and is configured to be each filter 169 detachably.
[0069]
　Secondary reservoir 165 is provided in the middle of the upstream side channel 161. The secondary reservoir 165 is a portion where the ink 100 flowing down from the storage unit 11 is temporarily stored.
[0070]
　Further, the upstream channel 161, between the reservoir 11 and the secondary reservoir 165, the electromagnetic valve 19 is provided. Electromagnetic valve 19, which opens and closes the upstream channel 161, the ink 100 from the reservoir 11 to the auxiliary reservoir 165 switches whether supplied. The electromagnetic valve 19, as shown in FIG. 2, is electrically connected to the control unit 15, the operation is controlled.
[0071]
　Valve 166 includes an upstream channel 161, the boundary portion between the first branch channel 163 and a second branch channel 164, i.e., located at the branch point. Valve 167 includes a downstream channel 162, a boundary portion between the first branch channel 163 and a second branch channel 164, i.e., located at the confluence.
[0072]
　Valve 166 and valve 167, the ink 100 flowing down the upstream channel 161 is either flows down to the downstream side channel 162 passes through the first branch channel 163, or through the first branch passage 163 switching between the flows down to the downstream side channel 162 Te is switching unit.
[0073]
　These valves 166 and valve 167, as shown in FIG. 2, is electrically connected to the control section 15, operation is controlled.
[0074]
　Filter 168 is provided in the middle of the first branch channel 163, filter 169 is provided in the middle of the second branch channel 164. Filter 168 and filter 169 has the same configuration, hereinafter, representatively described filter 168.
[0075]
　Filter 168 has a function of capturing the foreign matters of the ink 100 passing through the first branch passage 163. Filter 169 has a function of capturing the foreign matter in the second branch channel 164. Note that the foreign matter in the ink 100, for example, depending on the composition of the ink 100, the precipitated solid component of the ink 100 and that refers to such as dust mixed in ink 100.
[0076]
　These filters 168 and 169, a large number of micropores are formed in the sheet material provided by weaving a wire of metallic material, for example. Passed through a ink 100 by the micropores, by prohibiting the passage of foreign matter, the filter 168, 169, exerts the function.
[0077]
　Test pressure gauge 17, of the ink flow path 16, upstream of the filter 168 and filter 169, i.e., provided on the upstream side channel 161, the upstream side pressure detection unit for detecting the pressure of the upstream side flow passage 161 is there. Test pressure gauge 18, of the ink flow path 16 disposed downstream of the filter 168 and filter 169, a downstream pressure detection portion for detecting a pressure in the ink flow path 16. By these test pressure gauge 17 and 18 are provided, it is possible to detect the pressure of the upstream side flow passage 161 and the downstream-side flow path 162.
[0078]
　Here, in the conventional printing apparatus, the ink flow path between the reservoir and the nozzle is in each respective one for each ink type, a filter is provided in the middle of the ink flow path. The filter foreign substances are accumulated when requiring replacement of the filter, it is necessary to temporarily filter replacement to stop printing. Therefore, lowering the printing efficiency. In contrast, according to the present invention, it is possible to prevent such a problem. Hereinafter, this will be described in detail with reference to FIGS. 3 to 8.
[0079]
　Figure 3 is a diagram illustrating a print state of the printing apparatus 1 is performing printing. In this printing state, as an example, the ink 100, the upstream channel 161, through the first branch passage 163 and the downstream channel 162, are supplied to the nozzle 131 shown in FIG. Note that the second branch channel 164, not the ink 100 flows down, the filter 169, new condition, i.e., a state where foreign matter is not accumulated in the second branch passage 164, ink 100 is filled.
[0080]
　Ink 100 flowing down the first branch passage 163, the foreign matter is captured by the filter 168 when passing through the filter 168. Thus, it is possible to prevent when the ink 100 is discharged from the nozzle 131 shown in FIG. 1, or is discharged by foreign matter, from or cause clogging of the nozzle 131.
[0081]
　And filter 168 captures the foreign matter, the foreign matter is accumulated in the filter 168, which may clog the filter 168 is generated. In the printer 1 performs the pressure at which test manometer 17 has been detected, based on the pressure detection pressure gauge 18 detects a first branch channel 163 to switch between the second branch channel 164. As a result, it is possible to know exactly when to replace the filter 168 and filter 169.
[0082]
　In the printer 1 detects clogging of the filter 168, by actuating the valve 166 and the valve 167 is switched so that the ink 100 passes through the second branch passage 164. This makes it possible to ink 100 passes through the filter 169 of the new, it can be continued entrapment of foreign object. Thus, in the printer 1, without stopping the supply of ink 100 from the reservoir 11 to the nozzle 131, it is possible to perform switching operation of switching from the filter 168 clogged with a new filter 169. Therefore, even if the clogging occurs in the filter 168 during printing can be prevented by the switching operation, from interrupting the printing. Therefore, it is possible that the printing efficiency be prevented.
[0083]
　By the printing apparatus 1, after the switching operation is performed, the operator performs the replacement work of exchanging filter 168 clogged with a new filter 168a. First, as shown in Figure 5 in an arrow A, disengaging the first branch passage 163 from the valve 166 and valve 167. At this time, the operator can discharge the ink 100 remaining in the first branch flow channel 163.
[0084]
　Then, as shown in FIG. 6 the arrow B, to disengage the filter 168, as shown in FIG arrow C, and fitted with a new filter 168a. Then, as shown in arrow in FIG. 8 D, in a state where the filter 168a is attached, is attached to the first branch passage 163 again valve 166, 167.
[0085]
　Thus, in the printer 1, the filter 168 is detachable from the first branch channel 163, filter 169 is detachable from the second branch channel 164. This makes it possible to filter 168 and filter 169 respectively replace the filter new.
[0086]
　Also in the printing apparatus 1, the first branch passage 163 is capable each filter 168 detachably, the second branch passage 164 can be each filter 169 detachably. Thus, the replacement work can be performed in a state of being disengaged first branch flow channel 163 or the second branch channel 164. Therefore, it is possible to carry out the exchange work easily.
[0087]
　Here, as shown in FIG. 1, the printing device 1 includes a movable portion 200. Movable unit 200, a printing unit 13, and a portion of the downstream channel 162, a movable part when printing. In the printer 1, as shown in FIG. 1, a filter 168, a filter 169, a first branch channel 163 and a second branch channel 164, a position off from the movable portion 200, i.e., upstream of the movable portion 200 It is located in. Thus, filter 168, filter 169, a first branch channel 163 and a second branch channel 164, regardless of the movement and stop of the movable portion 200, the movement is restricted. Thus, even also in press stopped even during printing, it is possible to perform the replacement work. That is, regardless of the operation and stopping of the printing apparatus 1, with the first branch passage 163 and the second branch passage 164 is stopped, it is possible to perform the replacement work of the filter 168 and filter 169.
[0088]
　In the printer 1, the first branch passage 163 is switched to the second branch channel 164, if done during printing can be prevented to stop printing for the replacement. Therefore, it is possible that the printing efficiency be prevented.
[0089]
　It is to be noted that the "printing Stop", of course, when you have not been printed, and when you are stopped at a turning point in the reciprocating movement of the printing unit 13, when stopped in the middle of the intermittent feeding, etc., printing including when the print unit 13 even during has stopped.
[0090]
　Further, for example, the ink 100, if the solid component by being swung were those prone to settle shows the movable unit 200, the tendency of foreign matter is likely to occur. In this case, although not shown, a filter 168, a filter 169, a first branch channel 163 and the second branch passage 164 is preferably included in the movable portion 200. That is, the filter 168, a filter 169, a first branch channel 163 and the second branch passage 164 is preferably configured to move together with the movable section 200. Thus, foreign matter generated by the movable portion 200 can be immediately captured by the filter 168 or filter 169.
[0091]
　Further, filter 168, filter 169, a first branch channel 163 and a second branch channel 164, if a configuration is included in the movable portion 200, the replacement, when the movable portion 200 is stopped preferably carried out. Thus, in a state where the first branch passage 163 and the second branch passage 164 is stopped, it is possible to easily replace the filter 168 and filter 169.
[0092]
　The electromagnetic valve 19 is relatively liable become hot, when using the easy ink solid component precipitated at high temperatures, the tendency of foreign matter by electromagnetic valve 19 occurs. Therefore, first branch channel 163 and a second branch channel 164, the solenoid valve 19, may be provided between the sub-reservoir 165. Thus, foreign matter generated by the electromagnetic valve 19 with a filter 168 or filter 169 can immediately be captured.
[0093]
　Next, the control operation of the printing apparatus 1, i.e., the print method of the present invention will be described with reference to the flowchart shown in FIG. Also in the following description, similarly to the above, the ink 100, the upstream channel 161, through the first branch passage 163 and the downstream channel 162, will be described when it is supplied to the nozzle 131 (see Figure 3).
[0094]
　First, in step S101, to start printing (printing process).
　Then, in step S102, the detected pressure P1 on the upstream side of the filter 168, and a pressure P2 on the downstream side. Then, in step S102, the pressure difference ΔP between the pressures P1 and P2 determines whether or less or not than the threshold value P0.
[0095]
　In step S103, when it is determined that [Delta] P ≧ P0, regarded as clogged the filter 168, in step S104, performs a switching operation (switching step). That is, by switching the valve 166 and valve 167, the ink 100 is switched to be supplied to the nozzle 131 passes through the second branch passage 164 (see FIG. 4). As a result, despite the clogging has occurred in the filter 168, it is possible to continue printing.
[0096]
　Then, in step S105, the notification to the effect that clogging occurs in the filter 168. Thus, as described above, the operator can replace the filter 168 with a new filter 168a (see FIGS. 5 to 8).
[0097]
　Then, in step S106, it is determined whether or not printing is completed. If printing is determined not to be completed, the process returns to step S102, sequentially repeating the following steps.
[0098]
　Thus, the printing method of the present invention is a printing method performed by using the printing apparatus 1, a printing step for printing, during the printing process, as the predetermined condition, the pressure difference between the pressures P1 and P2 based on the [Delta] P, and a switching step of switching between the ink 100 passes any of the flow path of the first branch channel 163 and the downstream channel 162.
[0099]
　According to the printing method of the present invention, it is possible to continue one filter print even if clogging of the filter 168 and filter 169. It can be printed efficiently be prevented.
[0100]
　Incidentally, in the above, based on the pressure difference ΔP between the pressures P1 and P2 as the predetermined condition, there has been described a case where the switching operation is not limited thereto in the present invention, for example, the cumulative operating time of the printing apparatus 1 or it may be performed switching operation based on the discharge amount of the ink 100.
[0101]
　
　FIG. 10 is a partially enlarged schematic view of an ink flow path provided in the second embodiment of the printing apparatus of the present invention, a view showing a state where the ink is flowing down the first flow path is there. Figure 11 is a partial enlarged schematic view of the ink flow path printing apparatus comprising shown in FIG. 10 is a diagram showing a state where the ink is switched to flow down the second flow path. Figure 12 is a partial enlarged schematic view of an ink flow path provided in the printing apparatus shown in FIG. 10 is a diagram showing a state in which replacing the first filter to a new filter. Figure 13 is a partial enlarged schematic view of the ink flow path printing apparatus comprising shown in FIG. 10 is a diagram illustrating the supply of ink to the first flow path.
[0102]
　Hereinafter, a description of a second embodiment of the printing apparatus of the present invention with reference to this figure focuses on the differences from the embodiment described above, it omitted the same matters will be described.
　This embodiment, except for the configuration of the ink flow path is different is the same as the first embodiment.
[0103]
　In the printer 1A shown in FIGS. 10 to 13, the ink flow path 16 is replenished passage 20a and the replenishment flow path 20b, the waste drain path which is connected to the first branch channel 163 and a second branch channel 164 and a 20c and disposal passage 20d.
[0104]
　Replenishment passage 20a connects the the reservoir 11 shown in FIG. 1 and the first branch passage 163. The replenishment flow path 20a is to refill the ink 100 in the first branch passage 163. Replenishing passage 20b connects the the reservoir 11 shown in FIG. 1 and a second branch channel 164. The replenishment flow path 20a is to refill the ink 100 in the second branch channel 164.
[0105]
　Disposal passage 20c is connected to the first branch channel 163. The waste flow path 20c is configured to discharge the ink 100 in the first branch channel 163. Disposal passage 20d is connected to the second branch flow channel 164. The waste flow path 20d is configured to discharge the ink 100 in the second branch channel 164.
[0106]
　Replenishment passage 20a and the waste drain path 20c is connected to the first branch flow channel 163 via a valve (not shown), communicating and non-communicating is controlled. Replenishment flow path 20b and the waste drain path 20d is connected to the second branch flow channel 164 via a valve (not shown), communicating and non-communicating is controlled.
[0107]
　Incidentally, the waste flow path 20c and the waste drain path 20d has a suction pump (not shown) is provided, able to discharge the first ink 100 of the branch channel 163 and the second branch channel 164 by sucking it can.
[0108]
　Next, the operation of the printing of the printing device 1A.
　First, as shown in FIG. 10, the printing apparatus 1A, and performs printing using a first branch channel 163.
[0109]
　Then, as shown in FIG. 11, when the clogging in the filter 168 has occurred, it performs printing by switching from the first branch channel 163 in the second branch channel 164. Then, the ink 100 remaining in the first branch passage 163 is discharged through the waste liquid flow path 20c. Thus, the first branch passage 163, air and will, when performing the replacement of the filter 168 shown in FIG. 12, the ink 100 can be prevented or adheres to hands, to spills.
[0110]
　After replacement of the filter 168 and filter 168a is completed, as shown in FIG. 13, to replenish the ink 100 in the first branch passage 163 via the replenishing flow path 20a. Thus by keeping the first branch flow channel 163 during the use of the second branch channel 164 filled with ink 100, even clogged the filter 169 of the second branch channel 164, first anytime it can be switched to one branch channel 163.
[0111]
　In particular, the filter 168a of the new article, there are air into the micropores, in the state where air is present, shows a tendency to trapping force of the foreign matter is decreased. Further, shown when air is discharged from the nozzle 131, the tendency of the print quality is degraded. In the printing apparatus. 1A, filled with ink 100 in the micropores of the new filter 168a, i.e., by previously discharging air, along with the trapping force of the foreign matter can be prevented from being lowered, reduced print quality to be able to prevent.
[0112]
　
　FIG. 14 is a partially enlarged schematic view of an ink flow path provided in the third embodiment of the printing apparatus of the present invention. Figure 15 is a diagram showing a deaeration unit in which the ink flow path shown in FIG. 14 has.
[0113]
　Hereinafter, a description of a third embodiment of the printing apparatus of the present invention with reference to this figure focuses on the differences from the embodiment described above, it omitted the same matters will be described.
　This embodiment, except that the degassing portion is provided is the same as the first embodiment.
[0114]
　Printing apparatus 1B, respectively provided in the first branch channel 163 and a second branch channel 164, deaerating section 30a for degassing the first branch channel 163 and a second branch channel 164, further comprising a 30b ing.
[0115]
　Degassing section 30a, in the middle of the first branch channel 163, and is provided on the downstream side of the filter 168. Degassing unit 30b is in the middle of the second branch channel 164, and is provided on the downstream side of the filter 169. These degassing unit 30a, 30b has the same configuration, hereinafter, representatively described deaerating section 30a.
[0116]
　Deaerating section 30a is provided so as to protrude from the first branch channel 163, and a housing portion 301 for housing the bubble 101 in the ink 100, and a gas permeable membrane 302 provided in the housing section 301.
[0117]
　Gas permeable membrane 302, the bubble 101 is transmitted is composed of a film member to prohibit the transmission of ink 100. Housing portion 301 by the gas permeable membrane 302, a portion where the ink 100 passes are made part and two-stroke air bubbles 101 are present.
[0118]
　The housing portion 301, the pump 303 is connected, the bubble 101 in the ink 100 is moved to the collapsed portion 301 through the gas permeable membrane 302 by suction.
[0119]
　According to this printing apparatus 1B, for example, as shown in FIG. 13, the filter 168 new, i.e., when replaced with one that contains the air, to replenish the ink 100 in the first branch channel 163, the air in the new filter 168 can be reliably pull out.
[0120]
　While the printing apparatus and a printing method of the present invention have been described embodiments illustrated in the drawings, the present invention is not limited to this, each unit constituting the printing apparatus, similar functions were any may exert it can be replaced with the configuration. Or it may be added with a arbitrary structures.
[0121]
　The printing apparatus of the present invention, among the respective embodiments, or may be a combination of arbitrary two or more configurations (features).
[0122]
　In each embodiment, although a configuration for switching the two flow paths is not limited thereto in the present invention, three or more channels may be provided a configuration in which switching between them.
[0123]
　In the above embodiment, although the first and second channels has been described it is removable, without being limited thereto in the present invention, first and second channels are not detachable it may be.
[0124]
　Also, in the respective embodiments, replacement of the first filter or second filter has been described to be performed by the operator, it is not limited to this in the present invention, for example, printing device the exchange mechanism of the filter It has, or may be performed automatically by the exchange mechanism.
DESCRIPTION OF SYMBOLS
[0125]
1 ... printing apparatus, 1A ... printing apparatus, 1B ... printing apparatus, 2 ... drying section, 3 ... feeding device, 4 ... retractor, 5 ... supporting device, 10 ... machine base, 11 ... storage part, 12 ... transport unit , 13 ... printing section, 14 ... lift mechanism, 15 ... control unit, 16 ... ink flow path, 17 ... inspection gauge, 18 ... inspection gauge, 19 ... electromagnetic valve, 20a ... refill passage, 20b ... refill channel, 20c ... disposal passage, 20d ... disposal passage, 21 ... chamber, 22 ... coil, 30a ... degassing unit, 30b ... degassing unit, 31 ... delivery roller, 32 ... tensioner, 41 ... winding roller, 42 ... tensioner , 43 ... tensioner, 44 ... tensioner, 51 ... main driving roller, 52 ... driven roller, 53 ... endless belt, 54 ... tensioner, 55 ... tensioner, 100 ... ink, 101 ... bubble, 131 ... nozzle, 132 ... carry Di unit, 151 ... CPU, 152 ... storage unit, 161 ... upstream side passage, 162 ... downstream-passage, 163 ... first branch flow channel, 164 ... second branch flow channel, 165 ... sub reservoir, 166 ... valve, 167 ... valve, 168 ... filter, 168a ... filter, 169 ... filter, 200 ... movable part, 300 ... notification unit, 301 ... storage unit, 302 ... gas permeable membrane, 303 ... pump, A ... arrows, B ... arrow , C ... arrow, D ... arrows, P0 ... threshold, P1 ... pressure, P2 ... pressure, [Delta] P ... pressure difference, S101 ... step, S102 ... step, S103 ... step, S104 ... step, S105 ... step, S106 ... step, W ... work

WE CLAIM

A reservoir for storing ink,
　the is supplied the ink from the reservoir, and a discharge unit that performs printing by ejecting supplied the ink,
　and connected to the reservoir and the discharge portion, from the reservoir and an ink flow path in which the ink flows down toward the discharge portion,
　the ink flow path includes a first flow path, provided in the first flow path, the ink passing through the first flow path has the a first filter for trapping foreign matter, and a second flow path that is independent of the first flow path, and a second filter for trapping foreign matter of the ink passing through the second flow path, a
　predetermined based on the condition, a printing apparatus, wherein the ink is configured to be switchable whether to pass either of the flow path of said first flow path and the second flow path.
[Requested item 2]
　Said ink flow path, the printing apparatus according to claim 1 which is branched into a second flow path and the first flow path on the way.
[Requested item 3]
　It said ink flow path, the printing apparatus according to claim 2, which merge at the downstream side of the branch point of the second flow path and the first flow path.
[Requested item 4]
　Wherein the first filter is detachable from the first flow path,
　the second filter, according to any one of to the claims 1 detachable from the second flow path 3 printing device.
[Requested item 5]
　The first flow path, the first is capable per filter removable,
　said second flow path, the printing apparatus according to any one of claims 1 to 4 is removable by the second filter.
[Requested item 6]
　It said ink flow path, of the ink flow path, provided on the upstream side of the first filter and the second filter, the upstream pressure detection portion for detecting a pressure of the ink flow path, the ink flow of road than said first filter and said second filter provided on the downstream side, any one of claims 1 to 5 having a downstream pressure detection portion for detecting a pressure of the ink flow path the printing apparatus according to.
[Requested item 7]
　And pressure the upstream pressure detection portion detects, on the basis on the downstream pressure the pressure detecting section detects, printing of claim 6 for switching between the second flow path and the first flow path apparatus.
[Requested item 8]
　Wherein the discharge portion has a movable portion movable in performing the printing,
　the first filter and the second filter, according to any one of claims 1 to 7 moves together with the movable portion of the printing apparatus.
[Requested item 9]
　The replacement of the first filter or the second filter, the printing apparatus according to claim 8, wherein the printing is performed while stopped.
[Requested item 10]
　Wherein the discharge portion has a movable portion movable in performing the printing,
　the first filter and the second filter, regardless of the movement and stop of the movable portion, wherein the movement is restricted printing apparatus according to any one of claims 1 to 7.
[Requested item 11]
　The replacement of the first filter or the second filter, the printing apparatus according to claim 10, wherein during printing or the printing is performed while stopped.
[Requested item 12]
　Wherein are respectively connected to the first flow path and the second flow path, to any one of claims 1 to 11 having a disposal passage for discharging the ink of the first flow path and the second flow path the printing apparatus according.
[Requested item 13]
　Respectively provided in the first flow path and the second flow path, the printing according to any one of claims 1 to 12 having a degassing unit for degassing the first flow path and the second flow path apparatus.
[Requested item 14]
　A reservoir for storing ink, the is supplied the ink from the reservoir, and connecting a discharge unit that performs printing by ejecting supplied the ink, and the reservoir and the discharge portion, from the reservoir and an ink flow path in which the ink flows down toward the discharge portion, the ink flow path includes a first flow path, provided in the first flow path, the ink passing through the first flow path of a first filter for trapping foreign matter, and a second flow path that is independent of the first flow path, and a second filter for trapping foreign matter of the ink passing through the second flow path, a printing device having a printing method for printing by using,
　a printing step of performing the printing,
　in the printing process, based on a predetermined condition, of any said ink of said first flow path and the second flow path this has a switching step, the switching whether to pass the flow path Printing method according to claim.