JP2006231524A - Damper device, its manufacturing method, recording apparatus, and liquid jet apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a damper device and the like, which are structurally compact and simple, inexpensive, excellent in pressure fluctuation absorbing characteristics, and easily moldable. <P>SOLUTION: The damper device 1 is equipped with a damper base 35 installed midway of an execution medium transfer path 34 and provided with an effective medium channel 37 functioning as a pressure regulating chamber formed inside of it and a sealing film 36 covering the top face of the damper space 35 for sealing the channel 37. A bendable part 42 functioning to absorb fluctuation in pressure in the chamber 37 is three-dimensionally formed in the sealing film 36 in advance. A plurality of the channels 37 partitioned by partition walls 40 corresponding to a plurality of execution media A and formed in a meandering pattern by using channel walls 41 are formed in the damper base 35. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

In the present invention, for example, when the ink pressure of the ink supplied to the recording head of the ink jet printer fluctuates, the ink pressure fluctuation is absorbed and the ink pressure environment in the recording head is maintained under a predetermined pressure environment. The present invention relates to a damper device, a method for manufacturing the damper device, and a recording apparatus including the damper device.
Further, the present invention relates to a liquid ejecting apparatus such as an ink jet recording apparatus that performs recording (attaches liquid) on a recording material (liquid ejecting material) by ejecting (ejecting) a liquid such as ink from the head, and the liquid The present invention relates to a damper device provided in an injection device and a method for manufacturing the damper device.

  Here, the liquid ejecting apparatus uses an ink jet recording head, and is not limited to a recording apparatus such as a printer, a copying machine, and a facsimile machine that records ink on a recording material by discharging ink from the recording head. It is used to include a device for ejecting a liquid corresponding to the application from a liquid ejecting head corresponding to the recording head to a liquid ejecting material corresponding to a recording material and attaching the liquid to the liquid ejecting material.

  In addition to the recording head, as a liquid ejecting head, a color material ejecting head used for manufacturing a color filter such as a liquid crystal display, and an electrode material (conductive paste) used for forming an electrode such as an organic EL display or a surface emitting display (FED) Examples thereof include an ejection head, a bioorganic matter ejection head used for biochip production, and a sample ejection head as a precision pipette.

Hereinafter, an ink jet printer which is an example of an ink jet recording apparatus or a liquid ejecting apparatus will be described as an example.
In an ink jet printer, a recording head is mounted on the lower surface of the carriage, the carriage is reciprocated in the main scanning direction, and the paper is transported in the sub-scanning direction orthogonal to the main scanning direction, thereby recording over almost the entire area of the paper recording surface. Is running.
In this case, the ink pressure of the ink supplied to the recording head fluctuates due to a sudden movement of the carriage, etc., increasing the dot diameter of the ink or discharging excess ink from the recording head, which may adversely affect the recording quality. is there. This tendency is that the ink cartridge is not mounted on the carriage, that is, the ink cartridge is mounted in a fixed state with respect to the printer body, and the ink tube fed out from the ink cartridge is bent in a loop shape and the direction of 180 ° is changed. This appears remarkably in an ink jet printer of a type connected to a joint member or the like on the recording head side.

  Therefore, in the conventional ink jet printer, in order to prevent the fluctuation of the ink pressure that adversely affects the recording quality, a pressure adjusting chamber is provided in the ink transport path immediately before reaching the recording head, and the ink pressure of the ink head is reduced. The change was not transmitted. The pressure adjusting chamber includes a square box-shaped pressure adjusting box having a relatively large wrinkle in which an ink flow path for supplying ink to the recording head is formed, and an opening surface of the ink flow path in the pressure adjusting box A rubber sheet for closing the ink pressure is absorbed, and the pressure corresponding to the fluctuation of the ink pressure is absorbed using elastic deformation of the rubber sheet.

However, in order to achieve a predetermined pressure absorbing action by the rubber sheet, a relatively large working area is required from the viewpoint of compliance, and the size of the pressure adjusting chamber is increased.
The reason will be explained. In the case of a rubber sheet, pressure is absorbed by its elastic deformation. If the thickness of the rubber sheet is reduced, elastic deformation is likely to occur, so that the working area can be reduced. However, even if the thickness of the rubber sheet is reduced, there is a limit on the material, and at present, the thickness is limited to about 0.2 mm. For this reason, in the case of a rubber sheet, a large working area is inevitably required from the viewpoint of compliance, which has been a factor in increasing the size of the pressure regulation chamber.

  Further, Patent Document 1 below discloses a damper device that uses a vibration film formed of a polyethylene film and a leaf spring in combination to improve durability that can cope with an excessive negative pressure. However, it still requires a large damper main body that functions as a pressure adjusting chamber, which has been a major obstacle in reducing the size of the entire inkjet printer including the recording head and carriage.

JP-A-6-115092

  Therefore, the present invention was devised in view of the existence of such background technology and problems that the background technology had, and was extremely compact and simple structure, inexpensive and excellent in pressure fluctuation absorption characteristics, It is an object of the present invention to provide a damper device that is easy to mold, a method for manufacturing the damper device, a recording device including the damper device, and the like.

  In order to solve the above problems, a damper device according to a first aspect of the present invention includes a damper base having a recess serving as a medium reservoir, a sealing film that covers and seals the recess of the damper base, and the recess And a communication portion that communicates with the medium flow path, and the sealing film is characterized in that a bending portion that functions to absorb pressure fluctuations in the medium flow path is previously formed in three dimensions. .

  Further, the damper device according to the second aspect of the present invention includes an operation execution means for executing a normal operation under a predetermined pressure environment, an execution medium supply means for supplying an execution medium to the operation execution means, and the execution When a pressure fluctuation occurs that is provided in an operation execution device that includes an execution medium conveyance path that conveys the execution medium supplied from the medium supply unit toward the operation execution unit, and prevents normal operation of the operation execution unit. A damper device that absorbs the pressure fluctuation and maintains the pressure environment in the operation executing means in a predetermined pressure environment, the damper device being provided in the middle of the execution medium transport path, and having an effective medium flow therein. A damper base formed with a path, and a sealing film that covers the upper surface of the damper base and seals the effective medium flow path, and the sealing film has a function of absorbing the pressure fluctuation. It is characterized in that the flexed portion plays is previously stereogenic.

  According to the first aspect or the second aspect of the present invention, the use of the sealing film enables a thinning that cannot be considered in the conventional rubber sheet, and the flexible film is formed in advance in the sealing film. As a result, even if the working area is relatively small, the bent portion of the sealing film is bent and deformed with good responsiveness, and pressure fluctuations can be absorbed.

A damper device according to a third aspect of the present invention is the damper device according to the first aspect or the second aspect, wherein the sealing film can be made thin, can be thermally welded, and is formed of a moisture-permeable material. It is characterized by being.
A damper device according to a fourth aspect of the present invention is characterized in that, in the third aspect, the sealing film is a multilayer film including a heat-weldable layer and a moisture-permeable layer.

  According to these 3rd aspect or 4th aspect of this invention, since a sealing film can be attached to a damper base by heat welding, the attachment operation | work of a sealing film becomes easy. Moreover, evaporation of the execution medium to the outside can be prevented by the moisture resistance of the sealing film. In addition, the sealing film can be made thin, and necessary compliance can be ensured even in a small area. That is, it is possible to greatly reduce the size of the damper device that can exhibit a desired pressure fluctuation absorbing action.

  A damper device according to a fifth aspect of the present invention is the damper device according to any one of the second to fourth aspects, wherein the damper base has a plurality of effective medium flow paths corresponding to a plurality of execution media, Each effective medium flow path is partitioned by a partition wall, and the sealing film is thermally welded to the upper surface of the partition wall, and the bending portion corresponds to each effective medium flow path inside the heat welded. It is characterized by being provided individually.

  According to the fifth aspect of the present invention, for each effective medium flow path, the bending deformation centered on the bending portion is performed separately for each part of the sealing film. It becomes possible to effectively cope with fine pressure fluctuations. Further, since the area where the sealing film and the damper base are thermally welded is greatly increased, the strength of the sealing film against pressure fluctuation is also improved.

  The damper device according to a sixth aspect of the present invention is the damper device according to the fourth aspect, wherein the effective medium flow path is formed such that the execution medium meanders by arranging a plurality of flow path walls alternately. The height of the flow path wall is lower than that of the partition wall, and is set to be slightly lower than the bent portion of the sealing film installed on the damper base.

  According to the sixth aspect of the present invention, by forming the effective medium flow path so that the execution medium meanders and flows without stagnation, the discharge of bubbles from the effective medium flow path is improved. At the same time, the effective medium flow path can be lengthened, and the flow rate of the execution medium flowing in the effective medium flow path can be increased to promote the pressure fluctuation absorbing action by the bent portion of the sealing film, which can be effective. In addition, by setting the height of the flow path wall forming the effective medium flow path as described above, the sealing film is bent and deformed around the bent portion, and the bent portion hits the upper surface of the flow path wall. The upper opening of the effective medium flow path is closed. Therefore, the execution medium surely flows in the effective medium flow path, and the pressure fluctuation absorbing action by the sealing film for each effective medium flow path is executed.

  A damper device manufacturing method according to a seventh aspect of the present invention includes a damper base having an effective medium flow path formed therein, and a sealing film that covers the upper surface of the damper base and seals the effective medium flow path. A method of manufacturing a damper device in which the sealing film is formed with a three-dimensional bending portion that functions to absorb internal pressure fluctuations, and is flat against a damper base molded into a predetermined shape. A film mounting process for mounting a sheet-like sealing film, and a heater tool incorporated in a state in which a projection for forming a bent portion projects downward, and the sealing film is heated and pressed from above It is characterized by comprising a heat pressing step for simultaneously performing heat welding of the sealing film to the damper base and molding of the bent portion with respect to the sealing film.

  According to the seventh aspect of the present invention, it is possible to perform the heat welding of the sealing film to the damper base and the formation of the bent portion at a time by one operation of heating and pressing the heater tool. Productivity is improved and the manufacturing cost of the damper device can be greatly reduced.

A damper device manufacturing method according to an eighth aspect of the present invention is characterized in that, in the sixth aspect, the protrusion is formed of a material having low thermal conductivity and heat resistance.
A damper device manufacturing method according to a ninth aspect of the present invention is characterized in that, in the eighth aspect, the material of the protrusion is polytetrafluoroethylene (polytetrafluoroethylene).
According to these 8th aspect or 9th aspect of this invention, at the time of the heat press of a sealing film, it is prevented that a sealing film is heat-welded to the upper surface of a flow-path wall.

  A recording apparatus according to a tenth aspect of the present invention includes an ink supply including a recording head that performs a recording operation by discharging an appropriate amount of ink under a predetermined pressure environment, and an ink reservoir that supplies ink to the recording head. An ink transport path including an ink tube for transporting the ink supplied from the ink supply means toward the recording head, and a change in ink pressure that hinders normal ink ejection operation of the recording head. A damper device that absorbs fluctuations in the ink pressure and maintains the damper device in a predetermined pressure environment, wherein the damper device according to any one of the second to ninth aspects is applied as the damper device. It is a feature.

  According to the tenth aspect of the present invention, by using the sealing film, it is possible to reduce the thickness of the conventional rubber sheet, and it is possible to relatively reduce the thickness of the sealing film by previously forming the bent portion. Even if the working area is small, the bent portion of the sealing film can ensure the necessary compliance, and can be bent and deformed with high responsiveness to absorb pressure fluctuations. Since the damper device has a compact and simple structure, a small recording device that can be easily carried can be provided.

  A liquid ejecting apparatus according to a tenth aspect of the present invention includes a liquid ejecting head that performs a liquid ejecting operation by ejecting an appropriate amount of liquid under a predetermined pressure environment, and a liquid storage unit that supplies the liquid to the liquid ejecting head A liquid supply path including a liquid tube for conveying the liquid supplied from the liquid supply means toward the liquid jet head, and a liquid pressure that prevents a normal liquid jet operation of the liquid jet head. And a damper device that absorbs the fluctuation of the liquid pressure and keeps it in a predetermined pressure environment when the fluctuation occurs, and the damper device is provided in the middle of the liquid transport path, A damper base having a liquid channel formed thereon, and a sealing film that covers the upper surface of the damper base and seals the liquid channel, and the sealing film absorbs the pressure fluctuation. Flexed portion fulfilling is characterized in that it is pre-solid formed.

  Hereinafter, a damper device, a method for manufacturing the damper device, and a recording apparatus which is an example of a liquid ejecting apparatus including the damper device according to the present invention will be described. First, an ink jet printer 100 is taken up as the best mode for carrying out a liquid ejecting apparatus of the present invention and a recording apparatus as an example thereof, and an outline of the entire configuration will be described with reference to the drawings.

  FIG. 1 is a perspective view showing a state where an ink jet printer cover is removed, and FIG. 2 is a side sectional view showing an outline of the internal structure of the ink jet printer. The ink jet printer 100 described here is a portable ink jet printer having a relatively small size, light weight and a simple configuration suitable for carrying.

  The cassette 4 for feeding is located at the innermost side and the upstream side in the transport direction. As shown in FIGS. 1 and 2, the feeding cassette 4 is provided in a forwardly inclined posture at a position near the rear upper part of the printer main body 3 which is an example of the liquid ejecting apparatus main body and the recording apparatus main body. . Therefore, the printer main body 3 is not provided with a feeding tray which is generally installed, and the feeding cassette 4 has a function as a feeding tray.

  A recording material P (hereinafter also simply referred to as “paper P”), which is an example of a large number of stacked liquid ejecting materials accommodated in the feeding cassette 4, is provided below the leading end of the feeding cassette 4. The leading edge of the paper P is pushed upward via the hopper plate 16 by the hopper push-up cam 30. Accordingly, the leading edge of the sheet P is pinched by the hopper plate 16 and the feeding roller 14 positioned above, and is fed by a pinching and feeding action that accompanies rotation about the rotation shaft 17 of the feeding roller 14. The upper sheet P stacked in the feeding cassette 4 is pulled out toward the transport path.

  Further, when a plurality of sheets P are pulled out, a separation pad (not shown) that is an example of a separation operation unit that separates the succeeding fed sheet P from the uppermost sheet P, and the separated succeeding sheet P Only the uppermost sheet P is selected and guided to the conveyance path by a return lever (not shown) that returns the sheet P to the feeding cassette 4.

  Below the feeding roller 14, a conveyance guide 32 that is inclined so as to become lower toward the front (left side in FIG. 2) is provided. The uppermost sheet P drawn by the pressure feeding action by the feeding roller 14 and the hopper plate 16 is guided by the conveyance guide 32 and guided above the conveyance roller 19. Further, on the upstream side in the transport direction before the transport roller 19, a recording material detection unit (not shown) (hereinafter simply referred to as a detection lever), which is an example of a liquid jet material detection unit that detects the passage of the paper P, is provided. ing.

  A recording position 26 is formed on the downstream side in the transport direction of the transport roller 19. The recording position 26 is supported by a carriage guide shaft 12 that can reciprocate in the main scanning direction X as a main component of a recording execution unit that is an example of a liquid jet execution unit that executes recording on the paper P. A carriage 10 is provided. On the lower surface of the carriage 10, a recording head 13, which is an example of a liquid ejecting head that directly executes recording by ejecting (ejecting) ink, which is an example of liquid, onto the paper P is mounted. In addition, the carriage 10 includes, as an example, an ink that is an example of a liquid tube curved in a U shape or a J shape that extends from an ink cartridge C that is an example of a liquid cartridge mounted on the bottom of the printer body 3 from the back. The distal end portion of the tube 5 is connected, and is guided into the recording head 13 through an ink flow path which is an example of a liquid flow path (not shown).

  A platen 28 that defines a platen gap PG between the head surface of the recording head 13 and the paper P is provided below the recording head 13 so as to face the recording head 13. Then, between the carriage 10 and the platen 28, the sheet P is transported by a predetermined transport amount in the sub-scanning direction Y orthogonal to the main scanning direction X, and the recording head 13 is reciprocated once in the main scanning direction X. By alternately repeating the operation of ejecting ink from the recording head 13 onto the paper P, desired recording is performed over the entire recording surface of the paper P. Note that the platen gap PG is an extremely important element in executing high-precision recording, and is appropriately adjusted according to a change in the thickness of the paper P or the like.

  Disposed downstream of the recording head 13 is a discharge roller 20 that is an example of a liquid ejecting material discharge unit that includes a discharge drive roller 20a and a discharge driven roller 20b. Among these, the discharge driven roller 20 b is a toothed roller having a plurality of teeth on the outer periphery thereof, and is pivotally supported by the roller holder 21 in a freely rotatable state. Further, the discharge driven roller 20b is disposed such that its axial center position is located somewhat upstream in the transport direction from the discharge drive roller 20a. By adopting such an arrangement mode, the paper sheet P is formed in a curved state commonly called “reverse sled” that is slightly convex downward. As a result, the portion of the paper P located at the position facing the recording head 13 is pressed against the platen 28, so that the paper P is prevented from being lifted and recording is executed normally.

[Example]
Next, the damper device 1 and the method for manufacturing the damper device according to the present invention that can be applied to the ink jet printer 100 will be specifically described.

  FIG. 3 is a perspective view showing a state where the damper device is applied to an ink jet printer, and FIG. 4 is a side sectional view showing a state where the damper device is applied to the ink jet printer. FIG. 5 is a perspective view showing a state in which the damper device is disassembled, and FIG. 6 is a side cross-sectional view (a) and a plan view (b) schematically showing the operation mode of the damper device when absorbing pressure fluctuation. FIG. 7 is a side cross-sectional view (a) schematically showing the operation mode of the damper device during ink filling, a plan view (b), and FIG. 8 schematically shows a film placing step in the method of manufacturing the damper device. They are a side sectional view (a) and a side sectional view (b) schematically showing a heating and pressing step.

  The damper device 1 according to the present invention executes a recording head 13 as an operation execution means for executing a normal operation under a predetermined pressure environment, and an ink A which is an example of a liquid as an execution medium. Ink supply means 33 that is an example of liquid supply means including an ink cartridge C that is an example of a liquid ink cartridge as medium supply means, and ink A supplied from the ink supply means 33 is conveyed toward the recording head 13. A recording apparatus (in this embodiment), which is an example of a liquid ejecting apparatus, including an ink transport path 34 that is an example of a liquid transport path including an ink tube 5 that is an example of a liquid tube as an execution medium transport path. Inkjet printer) 100 is provided.

  The damper device 1 is configured to generate a pressure corresponding to the fluctuation of the ink pressure when the fluctuation of the ink pressure, which is an example of the liquid pressure, hinders the ink ejection operation, which is an example of the normal liquid ejecting operation of the recording head 13. And the pressure environment of the ink pressure in the recording head 13 is maintained in a predetermined pressure environment so that an appropriate amount of ink A is always ejected.

  The damper device 1 is provided at the end of the ink conveyance path 34 immediately before reaching the recording head 13, and includes a damper base 35 in which an effective medium flow path (concave portion) 37 that functions as a pressure adjustment chamber is formed. The upper surface of the damper base 35 is covered and a sealing film 36 for sealing the effective medium flow path 37 is provided.

  The damper base 35 is a thin plate-like member made of polypropylene (PP) having good corrosion resistance as an example, and corresponds to ink A of four colors of cyan, magenta, yellow, and black as an example inside. The four effective medium flow paths 37C, 37M, 37Y, and 37B are formed. The illustrated arrangement of the four effective medium flow paths 37C, 37M, 37Y, and 37B is an example, and the arrangement can be changed as appropriate. Further, an ink inlet 38 is formed on the upstream wall surface of each effective medium flow path 37C, 37M, 37Y, 37B, and the ink that guides ink A to the lower recording head 13 is formed on the downstream bottom surface. A outlet 39 of A is formed.

  Each effective medium flow path 37 </ b> C, 37 </ b> M, 37 </ b> Y, 37 </ b> B is partitioned by a partition wall 40, and the sealing film 36 is thermally welded to the upper surface of the partition wall 40. The effective medium flow path 37 is formed to meander by providing a plurality of flow path walls 41 alternately. The bottom surface of the effective medium flow path 37 is formed smoothly so that the stagnation point of the ink A does not occur. Further, the height of the flow path wall 41 is set to be lower than that of the partition wall 40 and slightly lower than the bending portion 42 of the sealing film 36 described below installed on the damper base 35.

  The sealing film 36 is formed of a material that can be thermally welded, has excellent corrosion resistance and moisture permeability resistance, and can be thinned. Specifically, a multilayer film obtained by laminating a 15 μm-thick nylon film, a silica deposited layer, and a 25 μm-thick polypropylene (PP) film, or a 12 μm-thick polyethylene terephthalate (PET) film, an aluminum deposited layer, and a 25 μm-thick A multilayer film obtained by laminating a polypropylene (PP) film can be used as an example.

  In addition, the reason why the polypropylene (PP) film is used in the multilayer film is the same material as the damper base 35 and is excellent in heat-weldability and corrosion resistance, and the other films and the vapor deposition layer enhance moisture resistance. It is provided for. When these multilayer films are used, the thickness of the sealing film 36 is extremely thin, about 40 μm, and the thickness of the conventional rubber sheet is much thinner than that of about 0.2 mm. Has succeeded.

  Further, the sealing film 36 is not a simple sheet-like member stretched on the damper base 35, but a part thereof is previously bent and deformed. In other words, the sealing film 36 is formed in advance with a three-dimensionally bent portion 42 that functions to absorb pressure fluctuations in the medium flow path. The bent portion 42 is formed by bending a part of the sealing film 36 so as to protrude downward as an example, and each effective medium flow path 37 </ b> C located inside the heat-welded portion on the upper surface of the partition wall 40. , 37M, 37Y, and 37B, four are formed individually.

  Next, the operation mode of the damper device 1 of the present invention configured as described above will be described separately for (1) pressure fluctuation absorption and (2) ink filling.

(1) When pressure fluctuation is absorbed (see Fig. 6)
For example, when the carriage 10 reciprocates in the main scanning direction X, a change in the ink pressure of the ink A occurs in the ink tube 5, and when the change in the ink pressure is transmitted to the damper device 1, the ink pressure Ink A with the fluctuation of the flow-in flows into the effective medium flow path 37 from the inflow port 38, and the sealing film 36 is centered on the bent portion 42 while being meandered by the flow path wall 41 and reaching the outflow port 39. In FIG. 6 (a), it is bent upward and deformed as indicated by the phantom line. As a result, the variation in the ink pressure is absorbed, and only an appropriate amount of ink A necessary for execution of recording from which the variation has been removed is supplied to the recording head 13. The pressure fluctuation absorbing action is executed for each effective medium flow path 37C, 37M, 37Y, 37B.

(2) When ink is filled (see FIG. 7)
Further, at the time of initial ink filling, the ink A is sucked from the nozzle side of the recording head 13 by a suction action by a maintenance pump (not shown).
At this time, since the sealing film 36 has a negative pressure inside the effective medium flow path 37 due to the suction action of the pump (not shown) and is pulled downward, the bending portion 42 is further bent downward and deformed, and the lower flow path It contacts the upper surface of the wall 41. As a result, the effective medium flow path 37 is sealed, so that the ink A supplied into the damper device 1 flows through the effective medium flow paths 37C, 37M, 37Y, and 37B formed in the damper base 35. In addition, the above-described operation is similarly executed when the execution of recording is started and a predetermined amount of ink A is ejected from the recording head 13.

  Next, a method of manufacturing the damper device according to the present invention suitable for manufacturing such a damper device 1 will be described with reference to FIG. The sealing film 36 of the damper device 1 can be formed by bending the bent portion 42 in a state before being attached to the damper base 35. However, according to the method for manufacturing the damper device of the present invention described below, it is more efficient. Thus, the damper device 1 can be manufactured.

  The manufacturing method of the damper device of the present invention includes (1) a film placing step shown in FIG. 8A and (2) a heating and pressing step shown in FIG. 8B, and these steps are sequentially executed. Thus, the damper device 1 is manufactured.

(1) Film placement process (see FIG. 8 (a))
In the film placing step, a flat sheet-like sealing film 36 cut into a predetermined shape is placed on the damper base 35 formed into a predetermined shape. At this time, the sealing film 36 is placed on the damper base 35 so that the sealing film 36 extends over the upper surfaces of all the partition walls 40 so that the polypropylene (PP) film faces downward.

(2) Heat pressing process (see FIG. 8B)
In the heating and pressing step, a sealing tool placed on the damper base 35 from above is used by using the heater tool 44 incorporated in a state in which a molding chip 43 that is a projection for forming the bent portion 42 projects downward. The film 36 is heated and pressed. When the heater tool 44 is used for heating and pressing, the polypropylene (PP) film in the sealing film 36 is melted by the heater tool 44 and thermally welded to the upper surface of the partition wall 40 in the damper base 35. At the same time as the thermal welding, the sealing film 36 is pressed by the molding chip 43 provided so as to protrude downward, and the bent portion 42 is formed in a part of the sealing film 36. The molded chip 43 is preferably formed of a material having low thermal conductivity and heat resistance. In this embodiment, the molded chip 43 is formed of polytetrafluoroethylene (polytetrafluoroethylene) as an example.

[Other embodiments]
The damper device 1, the damper device manufacturing method, the recording device 100 including the damper device 1, and the liquid ejecting apparatus according to the invention of the present application are based on the configuration as described above. Of course, it is possible to change or omit the partial configuration within a range that does not deviate.

  For example, the damper device 1 is not limited to the recording apparatus 100 and the liquid ejecting apparatus, and an operation execution unit that executes a normal operation under a predetermined pressure environment, and an execution medium supply unit that supplies an execution medium to the operation execution unit. The present invention can be applied to various operation execution apparatuses including an execution medium transport path for transporting the execution medium supplied from the execution medium supply unit to the operation execution unit.

  Further, the material, laminated structure, thickness, and the like of the sealing film 36 can be appropriately adjusted depending on the material of the damper base 35, the type of the execution medium, and the like, and surface processing that is not thermally welded to the upper surface of the flow path wall 41 of the damper base 35 is performed. It is also possible to apply. Incidentally, when surface processing that is not thermally welded is performed on the upper surface of the flow path wall 41, the molding chip 43 and the heater tool 44 can be constituted by an integral member, and the manufacturing cost of the damper device 1 can be reduced. It becomes possible to plan.

  A damper base having a concave portion serving as a medium reservoir different from the effective medium flow path; a sealing film that covers and seals the concave portion of the damper base; and a communication portion that communicates the concave section with the medium flow path. And a damper device in which a bending portion that functions to absorb pressure fluctuations in the medium flow path is formed in advance in the sealing film.

The perspective view which shows the state which removed the cover of the inkjet printer. FIG. 2 is a side sectional view showing an outline of the internal structure of the ink jet printer. The perspective view which shows the use condition of a damper apparatus. The sectional side view which shows the use condition of a damper apparatus. The exploded perspective view of a damper device. The schematic diagram which shows the operation | movement aspect of a damper apparatus at the time of pressure fluctuation absorption. The schematic diagram which shows the operation | movement aspect of the damper apparatus at the time of ink filling. The sectional side view which shows two processes of the manufacturing method of a damper apparatus.

Explanation of symbols

1 Damper device, 3 Printer body, 4 Feed cassette, 5 Ink tube,
10 carriage, 12 carriage guide shaft, 13 recording head (operation executing means),
14 feeding roller, 16 hopper plate, 17 rotating shaft (for feeding roller),
19 transport roller, 20 discharge roller, 20a discharge drive roller,
20b driven roller for discharge, 21 roller holder (for driven roller for discharge),
26 recording position, 28 platen, 30 hopper push-up cam,
32 transport guide, 33 ink supply means (execution medium supply means),
34 ink transport path (execution medium transport path), 35 damper base,
36 sealing film, 37, 37C, 37M, 37Y, 37B effective medium flow path,
38 inflow port, 39 outflow port, 40 partition wall, 41 flow path wall, 42 bending portion,
43 molding tips, 44 heater tools,
100 Inkjet printer (recording device), P paper (recording material),
X main scanning direction, Y sub-scanning direction, PG platen gap, C ink cartridge, A ink (execution medium)

Claims (11)

  A damper base provided with a recess serving as a medium reservoir, a sealing film that covers and seals the recess of the damper base, and a communication portion that communicates the recess with a medium flow path. A damper device in which a bending portion that functions to absorb pressure fluctuation in a medium flow path is formed in advance in three dimensions. An operation execution means for executing a normal operation under a predetermined pressure environment, an execution medium supply means for supplying an execution medium to the operation execution means, and an execution medium supplied from the execution medium supply means to the operation execution means Provided in an operation execution device including an execution medium conveyance path for conveying the pressure, and when a pressure variation that prevents normal operation of the operation execution unit occurs, the pressure in the operation execution unit is absorbed by absorbing the pressure variation. A damper device for maintaining an environment under a predetermined pressure environment,
The damper device is provided in the middle of the execution medium transport path, and has a damper base in which a concave portion serving as an effective medium flow path is formed, and a seal that covers the concave portion of the damper base and seals the effective medium flow path A damper device, wherein the sealing film is formed in advance with a three-dimensionally bent portion that functions to absorb the pressure fluctuation.   3. The damper device according to claim 1, wherein the sealing film can be made thin, can be thermally welded, and is formed of a moisture-permeable material.   4. The damper device according to claim 3, wherein the sealing film is a multilayer film including a heat-weldable layer and a moisture-permeable layer.   A plurality of effective medium flow paths corresponding to a plurality of execution media are formed in the damper base according to any one of claims 2 to 4, and each effective medium flow path is partitioned by a partition wall, The damper device is characterized in that the sealing film is thermally welded to the upper surface of the partition wall, and the bending portions are individually provided corresponding to the respective effective medium flow paths in the heat-welded interior.   6. The effective medium flow path according to claim 5, wherein the effective medium flow path is formed by staggering a plurality of flow path walls so that the execution medium meanders, and the height of the flow path wall is lower than the partition wall, A damper device, wherein the damper device is set to be slightly lower than a bent portion of a sealing film installed on a damper base. A damper base having an effective medium flow path formed therein, and a sealing film that covers the upper surface of the damper base and seals the effective medium flow path, the sealing film having a function of absorbing internal pressure fluctuations A method of manufacturing a damper device in which a bending portion that fulfills the above is three-dimensionally formed,
A film placing process for placing a flat sheet-like sealing film on a damper base molded into a predetermined shape;
Using a heater tool incorporated in a state where the projection for forming the bent portion protrudes downward, the sealing film is heated and pressed from above to thermally weld the sealing film to the damper base and to flex the sealing film. A heating and pressing step for simultaneously forming the ridge portion;
A method for manufacturing a damper device, comprising:   8. The method of manufacturing a damper device according to claim 7, wherein the protrusion is formed of a material having low heat conductivity and heat resistance.   9. The method for manufacturing a damper device according to claim 8, wherein the material of the protrusion is polytetrafluoroethylene. A recording head that performs a recording operation by discharging an appropriate amount of ink under a predetermined pressure environment, an ink supply unit that includes an ink storage unit that supplies ink to the recording head, and an ink supplied from the ink supply unit The ink transport path including the ink tube transported toward the recording head, and the ink pressure fluctuation when the ink pressure fluctuation that interferes with the normal ink ejection operation of the recording head occurs, absorbs the ink pressure fluctuation and has a predetermined pressure environment. A recording device comprising a damper device to keep below,
A recording apparatus, wherein the damper apparatus according to any one of claims 2 to 9 is applied as the damper apparatus. A liquid ejecting head that performs a liquid ejecting operation by ejecting an appropriate amount of liquid under a predetermined pressure environment, a liquid supply unit that includes a liquid storage unit that supplies the liquid to the liquid ejecting head, and a liquid supply unit that is supplied from the liquid supply unit The liquid transport path including the liquid tube that transports the liquid toward the liquid ejecting head, and the liquid pressure fluctuation is absorbed when the liquid pressure fluctuates to prevent normal liquid ejecting operation of the liquid ejecting head. A liquid ejecting apparatus including a damper device that maintains a predetermined pressure environment,
The damper device includes a damper base provided in the middle of the liquid transport path and having a liquid channel formed therein, and a sealing film that covers the upper surface of the damper base and seals the liquid channel. The liquid ejecting apparatus according to claim 1, wherein the film has a three-dimensionally formed bending portion that performs a function of absorbing the pressure fluctuation.

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