JP2020066179A - Seal structure, liquid outlet part and sealing method - Google Patents

Abstract

To provide a seal structure of a liquid storage body which can suppress occurrence of poor sealing due to deformation of a seal member.SOLUTION: A seal structure of a liquid storage body comprises: a liquid outlet part with a flow channel for leading out a liquid in a liquid storage body, which has (i) a flow channel formation member which has a leading end portion provided with an opening and a base end portion facing the leading end portion, and forms a flow channel, and (ii) a seal member located in the flow channel; and a film member which covers the opening. The flow channel formation member has a projection for deposition which is thermally deposited to the film member, and a projection wall which extends toward the inside of the flow channel from the other end on the base end portion side of the projection for deposition, and receives deposition sag.SELECTED DRAWING: Figure 7

Description

  The present disclosure relates to a seal structure, a liquid outlet, and a sealing method.

  Conventionally, there is known a seal structure in which a film is heat-welded to an opening surface of a liquid lead-out portion forming a liquid passage (Patent Document 1). In this seal structure, a seal member is arranged in the liquid passage of the liquid outlet. The opening surface of the liquid outlet is formed at the liquid outlet end of the liquid passage.

JP, 2008-230214, A

  In the conventional technique, the welding sag caused by the thermal welding between the film and the liquid lead-out portion may enter between the seal member and the liquid lead-out portion. In this case, the seal member may be deformed by the pressure applied from the welding sag. When the seal member is deformed, there is a possibility that a seal defect may occur in the seal structure.

  According to an aspect of the present disclosure, a seal structure for a liquid container is provided. The seal structure is a liquid lead-out portion having a flow path for leading out the liquid in the liquid container, and includes (i) a tip end portion having an opening, and a base end portion facing the tip end portion. A liquid flow-out portion that has a flow path forming member that forms the flow path, and (ii) a seal member that is arranged in the flow path, and a film member that covers the opening. The flow path forming member is a welding projection that is heat-welded to the film member, and a protruding wall that extends inward of the flow path from the other end on the base end side of the welding projection, And a projecting wall for receiving the welding sag.

FIG. 3 is a schematic diagram of a liquid ejection device. The perspective view of a liquid container. FIG. 6 is a perspective view of the liquid outlet portion before the film is attached. FIG. 6 is a perspective view showing the liquid lead-out portion in a state where the protruding portion is bent. FIG. 3 is a schematic cross-sectional view of a liquid lead-out portion before a film is attached. The enlarged view of the area | region enclosed by the dashed-dotted line in FIG. FIG. 6 is a schematic cross-sectional view of the liquid lead-out portion after the film is attached. 6 is a flowchart of a manufacturing process of the liquid container according to the embodiment. The perspective view which shows the seal structure in embodiment.

A. Embodiment FIG. 1 is a schematic view of a liquid ejection device 10. The liquid ejecting apparatus 10 is an apparatus that ejects liquid onto the medium 20 and holds the liquid on the medium 20. The liquid ejection device 10 is a so-called inkjet printer, which ejects ink as a liquid and prints on the medium 20. The medium 20 is a print medium such as paper, a plate material, or cloth. As the ink, for example, water-based ink or solvent ink can be used. In FIG. 1, three spatial axes that are orthogonal to each other, that is, an X axis, a Y axis, and a Z axis are drawn. The direction along the X axis is the X direction, the direction along the Y axis is the Y direction, and the direction along the Z axis is the Z direction. The liquid ejection device 10 is installed on an XY plane that is a plane parallel to the X and Y directions. The −Z direction is the vertically downward direction, and the + Z direction is the vertically upward direction. Also in the other drawings described below, the X axis, the Y axis, and the Z axis are attached as necessary.

  The liquid ejecting apparatus 10 includes a liquid container 100, a mounting unit 30 for mounting the liquid container 100, a carriage 34 having a head 32 for ejecting liquid to the outside, a drive mechanism 36, and a carrier for carrying the medium 20. The mechanism 39 and the control unit 90 are provided. The drive mechanism 36 drives the carriage 34 in the main scanning direction dm along the X direction. The transport mechanism 39 transports the medium 20 in a direction intersecting the main scanning direction dm, for example, in a sub-scanning direction ds which is a direction orthogonal to the main scanning direction dm. The sub-scanning direction ds is the −Y direction. The control unit 90 controls various operations of the liquid ejection apparatus 10, for example, printing operations. The liquid ejection device 10 is an off-carriage type inkjet printer. In the off-carriage type inkjet printer, the mounting unit 30 does not interlock with the driving of the carriage 34.

  The liquid container 100 is a container capable of containing a liquid therein. The liquid container 100 is detachably attached to the attachment portion 30. A tube 38 that allows liquid to flow between the liquid container 102 housed inside and the head 32 is attached to the mounting portion 30. The tube 38 and the liquid container 102 are connected by a liquid lead-out needle (not shown).

  FIG. 2 is a perspective view of the liquid container 100. FIG. 2 shows the liquid storage container 100 in an unused state. In FIG. 2, the X-axis, the Y-axis, and the Z-axis when attached to the liquid ejection device 10 are shown. The liquid storage container 100 includes a case 40 that forms an outer shell, and a liquid lead-out portion 60 that leads out the liquid stored inside to the liquid ejection device 10. The liquid storage container 100 has a liquid storage body 102, which is a bag body that is disposed inside the case 40 and stores the liquid therein. The liquid lead-out portion 60 forms a flow path 56 that connects the inside and the outside of the liquid container 102. The liquid lead-out portion 60 extends along the Y direction. The flow path 56 has a circular cross section. The liquid lead-out portion 60 has a tip portion 72A having an opening 72 formed therein and a base end portion 72B facing the tip portion 72A. The opening 72 forms one end of the flow path 56 and guides the liquid in the liquid container 102 to the outside. The base end portion 72B is connected to the liquid container 102 by welding.

  The case 40 is a housing made of synthetic resin such as polypropylene or polyethylene. On the outer wall surface of the case 40, a positioning portion 42 for determining a mounting position on the mounting portion 30 and an adapter portion 44 used for electrical connection with the liquid ejection device 10 are provided.

  When the liquid outlet 60 is attached to the mounting portion 30 of the liquid ejection device 10, the liquid outlet needle provided in the mounting portion 30 is inserted. Further, when executing the initial filling, the liquid introduction needle provided in the device for the initial filling is inserted.

  The film FM is attached to the liquid outlet 60 of the liquid container 100 before use. The film FM seals the flow path 56 by covering the opening 72. The film FM is a thin film member that suppresses liquid permeation. The film FM is formed of a thermoplastic resin, for example, a polyolefin-based synthetic resin such as polypropylene or polyethylene. The film FM is pierced by the liquid lead-out needle arranged in the mounting portion 30 when the liquid container 100 is mounted in the mounting portion 30.

  FIG. 3 is a perspective view of the liquid lead-out portion 60 before the film FM is attached. The liquid lead-out portion 60 has a flow path forming member 61 and a seal member 70. The flow path forming member 61 shown in FIG. 3 is a pre-welding flow path forming member in which the film FM is not welded.

  The flow path forming member 61 is a substantially cylindrical member that defines the flow path 56. In the flow path 56, the liquid drawn out from the inside of the liquid container 100 shown in FIG. 2 to the outside flows. The flow path forming member 61 has a welding projection 62 and a protruding wall 64. The flow path forming member 61 is formed of a thermoplastic resin that can be welded to the film FM, for example, a polyolefin-based synthetic resin such as polypropylene or polyethylene.

  The seal member 70 is arranged in the flow path 56 formed by the flow path forming member 61. The seal member 70 is made of an elastic resin such as an elastomer. The seal member 70 has an annular shape and forms a valve hole. The seal member 70 seals between the liquid lead-out needle and the flow path forming member 61 by contacting the outer peripheral portion of the liquid lead-out needle when the liquid storage container 100 is attached to the attachment portion 30. In addition, the seal member 70 seals between the liquid introduction needle inserted for initial filling and the flow path forming member 61 when performing the initial filling. As a result, the seal member 70 suppresses leakage of the liquid when the liquid container 100 is mounted on the liquid ejection device 10 and when the liquid is initially filled in the liquid container 100.

  The welding projection 62 is used for welding with the film FM when the film FM is attached. The welding projection 62 is formed on the tip portion 72A side of the flow path forming member 61 and forms an end surface on the tip portion 72A side. The welding projection 62 projects at least from the seal member 70 in the opening direction Od of the opening 72. The opening direction Od is the + Y direction. The welding projection 62 has an annular shape surrounding the periphery of the seal member 70. The tip portion 62A of the welding projection forms a surface on which the film FM is welded, and the other end portion 62B of the welding projection forms a surface that receives a welding sag described later.

  The protruding wall 64 is provided to receive the welding sag caused by the melting of the welding projection 62 when the film FM is welded. As shown in FIG. 5, the protruding wall 64 is welded to the first protruding wall 642 extending inward of the flow path 56 from the other end 62B formed on the base end 72B side of the welding projection 62. The second projection wall 644 that extends outward from the flow path 56 from the other end 62B formed on the base end 72B side of the projection 62 for use. The inside of the flow path 56 is a direction toward the center of the flow path 56, and the outside of the flow path 56 is a direction opposite to the inside of the flow path 56. Each of the first protruding wall 642 and the second protruding wall 644 has an annular shape that surrounds the periphery of the seal member 70. Since the first projecting wall 642 is provided, the gap 68 is formed between the welding projection 62 and the seal member 70.

  As shown in FIG. 3, the liquid lead-out portion 60 has a plurality of protruding portions 66A further protruding from the welding protrusion 62 in the opening direction Od before the film FM is attached. Specifically, six protrusions 66A are provided. The six projecting portions 66A are provided at equal intervals in the circumferential direction of the welding projection 62.

  The liquid lead-out part 60 and the film FM are welded by the following procedure. First, the protrusion 66 </ b> A of the liquid outlet 60 is bent toward the inside of the opening 72. Next, the liquid is initially filled from the liquid outlet 60 into the liquid container 100. After the initial filling is completed, the film FM is placed in the opening 72 of the liquid outlet 60. After the film FM is arranged so as to cover the opening 72, the film FM and the welding projection 62 are heat-welded.

  FIG. 4 is a perspective view showing the liquid lead-out portion 60 in a state where the protruding portion 66A is bent. The pressing portion 66B, which is the protruding portion 66A bent inward, presses the sealing member 70 from the tip end portion 72A side toward the base end portion 72B. Accordingly, the pressing portion 66B can limit the movement of the seal member 70 in the flow path 56, particularly the movement from the base end portion 72B side to the tip end portion 72A side. Therefore, movement of the seal member 70 from the installation position is suppressed. In this embodiment, the protrusion 66A is bent before the initial filling of the liquid. Therefore, when the initial filling is executed, the movement of the seal member 70 is restricted by the pressing portion 66B, so that the liquid can be prevented from leaking to the outside. The flow channel forming member 61 shown in FIG. 4 is a pre-welding flow channel forming member in which the film FM is not welded.

  FIG. 5 is a schematic sectional view of the liquid lead-out portion 60 before the film FM is attached. FIG. 5 shows a cross section corresponding to the cross section 5-5 in FIG. The liquid lead-out portion 60 includes a valve body 80 in addition to the flow path forming member 61 and the seal member 70.

  The valve body 80 is arranged in the flow path 56 closer to the base end portion 72B than the seal member 70. When the valve body 80 is not pressed by the liquid lead-out needle, that is, when the liquid storage container 100 is not attached to the attachment portion 30, the valve body 80 abuts the seal member 70 to close the valve hole of the seal member 70. As a result, the flow path 56 is not in communication with the outside of the liquid container 100. The seal member 70 functions as a valve seat member of the valve body 80 when the liquid storage container 100 is not mounted on the mounting portion 30. The valve body 80 separates from the seal member 70 when pressed by the liquid lead-out needle. As a result, a gap is formed between the valve body 80 and the seal member 70, so that the flow path 56 communicates with the outside of the liquid storage container 100. Further, when the initial filling is performed, the valve body 80 is pressed by the liquid introduction needle. As a result, a gap is formed between the valve body 80 and the seal member 70, so that the flow path 56 communicates with the outside of the liquid container 100, and the liquid can be injected and supplied.

  FIG. 6 is an enlarged view of the area surrounded by the alternate long and short dash line 6 in FIG. A part of the welding projection 62 is melted by heat when the film FM is welded. In the present embodiment, the welding projection 62 and the film FM are welded together in a state in which the liquid storage container 100 is installed so that the opening direction Od is vertically upward. Therefore, the welding sag that is a part of the welding projection 62 that is melted when being welded hangs in the direction opposite to the opening direction Od. Therefore, the welding sag enters the gap 68 side between the welding protrusion 2 and the seal member 70 or the region formed on the opposite side of the gap 68 with the welding protrusion 62 interposed therebetween, as shown by the broken line 92. In the following, the gap 68 and the weld sag that has moved to the side opposite to the gap 68 are also referred to as weld sag portions 92, respectively.

  The width w3 of the welding projection 62 is preferably smaller than the width w1 of the first protruding wall 642. The width w3 is the size of the welding projection 62 in the radial direction rd of the circular opening 72. The width w1 is the size of the first protruding wall 642 in the radial direction rd of the flow path 56. The width w3 is more preferably, for example, 80% or less of the width w1. Increasing the width w1 increases the gap 68 with respect to the width w3. By increasing the size of the gap 68, the amount that can be accommodated in the gap 68 can be increased even if the amount of welding sag increases. Therefore, it is possible to prevent the welding sag from reaching and contacting the seal member 70, and thus it is possible to suppress the sealing member 70 from being deformed by the pressure, heat, or the like applied to the sealing member 70 from the welding sag.

  The width w1 of the first protruding wall 642 and the width w2 of the second protruding wall 644 in the radial direction rd are the same. The width w2 is the size of the second protruding wall 644 in the radial direction rd of the flow path 56. Here, that the width w1 and the width w2 are the same includes not only the case where they are exactly the same, but also the case where they can be regarded as substantially the same when the liquid container 100 is used. The size that can be regarded as the same level is, for example, the difference between the width w1 and the width w2 is 10% or less of the width w1, and preferably 5% or less. Since the width w1 and the width w2 are the same size, the welding projection 62 has the same width in the radial direction rd as the width of the first projecting wall 642 and the width of the second projecting wall 644, and both sides thereof It projects in the opening direction Od from the center of the formed state. As a result, it is possible to prevent unevenness in the size of the welding sag portion 92 formed inside and outside the flow path 56 with the welding projection 62 sandwiched between them. It can be suppressed.

  When the position of the tip portion 62A of the welding projection 62 in the opening direction Od is constant before the film FM is attached, the larger the protrusion length T1 is, the larger the size of the gap 68 in the opening direction Od is. It is easy to do. When the size of the gap 68 in the height direction is large, the space in which the welding sag can move can be increased. In other words, the gap 68 can be made deeper. Therefore, it is possible to further suppress the welding sag moving to the opening 72 side and the deformation of the sealing member 70 due to the pressure applied to the sealing member 70 from the welding sag. The protrusion length T1 is preferably 5 times or more the thickness of the film FM, and more preferably 10 times or more.

  FIG. 7 is a schematic sectional view of the liquid lead-out portion 60 after the film FM is attached. The liquid lead-out section 60 and the film FM form a seal structure that suppresses the outflow of the liquid from the liquid container 100. The film FM is welded to the welding projection 62.

  The film FM may or may not be welded to the seal member 70. Whether the film FM and the seal member 70 are welded or not changes depending on, for example, the material of the seal member 70. For example, specifically, when the seal member 70 is formed of a thermoplastic elastomer such as olefin, the film FM and the seal member 70 can be welded to each other. On the other hand, for example, when the sealing member 70 is formed of an elastomer having no thermoplasticity such as butyl rubber, the welding of the film FM and the sealing member 70 is suppressed. In this embodiment, the seal member 70 and the film FM are not welded. Therefore, in the present embodiment, welding sagging due to the seal member 70 does not occur.

  The welding sag portion 92 is solidified in the gap 68. Since the welding sag generated when the welding projection 62 is welded is solidified, the material forming the welding sag portion 92 is the same as the material forming the welding projection 62. The welding sag portion 92 is formed, for example, on the first protruding wall 642 and the second protruding wall 644. In the present embodiment, the size of the welding sag portion 92 in the opening direction Od is smaller than the respective sizes in the opening direction Od from the first protruding wall 642 and the second protruding wall 622 to the tip of the seal member 70. That is, the film FM and the welding sagging portion 92 are arranged so as to be spaced apart without contact with each other.

  The process of forming the welding sag portion 92 is different from the process of forming the welding projection 62. Specifically, for example, the flow path forming member 61 including the welding projection 62 is formed by injection molding. On the other hand, the welding sag portion 92 is formed by solidifying the welding sag as described above. Therefore, the structure of the welding sag portion 92 and the structure of the welding protrusion 62 are different from each other. This difference in structure can be confirmed, for example, by observing the cross-sectional shape. Further, in the present embodiment, unlike the welding protrusion 62, the welding sag portion 92 is not welded to the film FM. Therefore, in terms of appearance, the welding sag portion 92 and the welding protrusion 62 have different structures.

  FIG. 8 is a flowchart of a manufacturing process of the liquid container 100 according to the embodiment. In the manufacturing process of the liquid container 100, first, the preparation process, which is step S101, is executed. In the preparing step, the liquid outlet 60 shown in FIG. 3 is prepared. In the preparation step, for example, the liquid container 102 is housed in the case 40. Further, for example, the seal member 70 is arranged in the flow path 56 of the flow path forming member 61. After step S101 is completed, step S102 is executed.

  In the pressing step that is step S102, the protruding portion 66A is bent to form the pressing portion 66B. Specifically, the protruding portion 66A is bent inward so as to press the seal member 70 from the distal end portion 72A of the flow path 56 toward the proximal end portion 72B. In the folding step, the liquid container 100 is initially filled after the pressing portion 66B is formed. After step S102 is completed, step S103 is executed.

  In the arranging step which is step S103, the film FM is arranged on the welding projection 62. Specifically, the film FM is arranged on the welding projection 62 so as to cover the opening 72. After step S103 is completed, step S104 is executed.

  In the attaching step which is step S104, the film FM is attached to the liquid outlet 60. Specifically, the film FM is attached to the liquid lead-out portion 60 by thermally welding the film FM to the welding projection 62. In the present embodiment, the heat welding of the film FM and the welding protrusion 62 is performed by heating the film FM and the welding protrusion 62 to about 200 ° C. in a period of about 2 to 3 seconds.

  FIG. 9 is a perspective view of the seal structure 600 according to the embodiment. The seal structure 600 shown in FIG. 9 is the liquid lead-out portion 60 to which the film FM is attached by the attaching step which is step S104 in FIG. In FIG. 9, components other than the seal structure 600 in the liquid container 100 are omitted. As shown in FIG. 9, in the seal structure 600, the film FM and the welding projection 62 are welded together in a state where the pressing portion 66B is formed. In the present embodiment, a part of the pressing portion 66B is welded to the film FM.

  According to the embodiment described above, the flow path forming member 61 is the first projecting wall 642 extending inward from the other end portion 62B of the welding projection 62 toward the inside of the flow path 56, and receives the welding sag. Of the first protruding wall 642. Therefore, the welding sag caused by the thermal welding between the film FM and the liquid lead-out portion 60 is received by the first protruding wall 642. Further, it is received by the second protruding wall 644. Specifically, the welding sag generated by the thermal welding between the film FM and the liquid lead-out portion 60 flows toward the gap 68 and the second protruding wall 644, so that the welding sag is caused by the first protruding wall 642 and the second protruding wall 644. It is received and the welding sag portion 92 is formed. As a result, the welding sag can be prevented from reaching the seal member 70, and thus the possibility that the sealing member 70 is deformed by the welding sag is reduced. Therefore, it is possible to suppress the occurrence of defective sealing due to the deformation of the seal member 70.

B. Other Embodiments B1. First Other Embodiment In the above-described embodiment, the welding projection 62 is formed along the outer periphery of the opening 72. However, the welding projection 62 may not be continuously formed along the outer periphery of the opening 72. For example, the welding projection 62 may be provided around the opening 72, and may be formed so as not to extend along the opening 72. “Do not follow the opening 72” means, for example, a case where the distance between the outer edge of the opening 72 and the welding projection 62 is not constant.

B2. Second Other Embodiment In the above embodiment, the protruding wall 64 has a first protruding wall 642 and a second protruding wall 644. However, the protruding wall 64 does not have to have the second protruding wall 644.

B3. Third Other Embodiment In the above embodiment, the liquid lead-out portion 60 has the protruding portion 66A, but it does not have to have the protruding portion 66A. Further, when the liquid lead-out portion 60 does not have the protruding portion 66A, the liquid lead-out portion 60 does not have to form the pressing portion 66B in which the protruding portion 66A is bent. In this case, the pressing step that is step S102 in FIG. 8 may not be executed.

B4. Fourth Other Embodiment In the above-described embodiment, the liquid sagging portion 92 is formed in the liquid lead-out portion 60 to which the film FM is welded. However, the welding sagging portion 92 may not be formed. The case where the welding sag portion 92 is not formed is a case where the welding sag does not reach the protruding wall 64 due to, for example, a small amount of the welding sag generated from the welding protrusion 62.

B5. Fifth Other Embodiment In the above-described embodiment, the welding sag portion 92 is not welded to the film FM. However, the welding sag portion 92 may be welded to the film FM. For example, the size of the welding projection 62 and the size of the protruding wall 64 may be adjusted so that at least a part of the welding sag portion 92 and the film FM are welded. When at least a part of the welding sag portion 92 and the film FM are welded, the area where the film FM and the liquid outlet portion 60 are welded becomes large. Therefore, the film FM and the liquid lead-out portion 60 can be welded more firmly.

B6. Sixth Other Embodiment In the above-described embodiment, the size from the base end to the one end in the opening direction of the welding protrusion 62 before welding is 5 times or more the thickness of the film FM. However, before the welding, the size of the welding protrusion 62 before welding is less than 5 times the thickness of the film FM as long as the welding protrusion 62 protrudes from the seal member 70 in the opening direction Od. Good.

  The first to sixth other embodiments described above also have the same effect in that they have the same configuration as the first embodiment.

B7. Seventh Other Embodiment The present disclosure is not limited to an ink jet printer and an ink tank for supplying ink to the ink jet printer, and accommodates any liquid ejecting device that ejects various liquids including ink and the liquid. It can also be applied to a liquid tank for For example, the present invention can be applied to the following various liquid ejecting apparatuses and their liquid tanks.
(1) Image recording device such as a facsimile device (2) Color material ejecting device used for manufacturing a color filter for an image display device such as a liquid crystal display (3) Organic EL (Electro Luminescence) display or surface emitting display (Field) Electrode material ejector used for electrode formation such as Emission Display (FED) (4) Liquid ejector for ejecting liquid containing bioorganic substances used for biochip manufacturing (5) Sample ejector as precision pipette (6) Lubrication Oil ejecting device (7) Resin liquid ejecting device (8) Liquid ejecting device for ejecting lubricating oil to a precision machine such as a clock or a camera at a pinpoint (9) Micro hemispherical lens (optical lens) used for optical communication elements ) Or the like, a liquid ejecting device (10) for ejecting a transparent resin liquid such as an ultraviolet curable resin liquid onto the substrate. Liquid discharge apparatus for discharging an alkaline etching solution (11) a liquid ejecting apparatus comprising a liquid discharge head for discharging droplets of other optional small amount.

  The term “droplet” refers to the state of the liquid ejected from the liquid ejecting apparatus, and also includes particles, teardrops, and threads that have tails. The “liquid” referred to here may be any material that can be ejected by the liquid ejection device. For example, the “liquid” may be a material in a liquid state when the substance is in a liquid phase, and a material in a liquid state having high or low viscosity, and sol, gel water, other inorganic solvent, organic solvent, solution, "Liquid" includes liquid materials such as liquid resin and liquid metal (metal melt). Further, not only a liquid as one state of a substance, but also a liquid in which particles of a functional material made of a solid material such as a pigment or metal particles are dissolved, dispersed or mixed in a solvent are included in the “liquid”. Further, typical examples of the liquid include the ink and liquid crystal described in the above embodiment. Here, the ink is meant to include various liquid compositions such as general water-based ink and oil-based ink, gel ink, and hot melt ink.

  The present disclosure is not limited to the above-described embodiments, and can be implemented with various configurations without departing from the spirit of the present disclosure. For example, the technical features of the embodiment corresponding to the technical features in each mode described in the section of the summary of the invention are to solve some or all of the above problems, or some of the above effects. Or, in order to achieve all, it is possible to appropriately replace or combine. If the technical features are not described as essential in this specification, they can be deleted as appropriate.

(1) According to one aspect of the present disclosure, a seal structure for a liquid container is provided. The seal structure is a liquid lead-out portion having a flow path for leading out the liquid in the liquid container, and includes (i) a tip end portion having an opening, and a base end portion facing the tip end portion. A liquid flow-out portion that has a flow path forming member that forms the flow path, and (ii) a seal member that is arranged in the flow path, and a film member that covers the opening. The flow path forming member is a welding projection that is heat-welded to the film member, and a protruding wall that extends inward of the flow path from the other end on the base end side of the welding projection, And a projecting wall for receiving the welding sag. According to the seal structure of this aspect, the flow path forming member has the projecting wall extending from the other end of the welding projection toward the inside of the flow path and for receiving the welding sag. For this reason, the gap formed between the welding projection and the sealing member becomes larger than in the case where the protruding wall is not provided. As a result, even if the welding sag occurs due to the thermal welding between the film member and the liquid outlet, the welding sag flows into the gap formed by the protruding wall. As a result, it is possible to prevent the welding sag from reaching the seal member, so that the possibility of the sealing member deforming due to the welding sag is reduced. Therefore, it is possible to suppress the occurrence of defective sealing due to the deformation of the seal member.

(2) In the seal structure of the above aspect, the welding projection may be formed along the outer periphery of the opening. According to the seal structure of this aspect, the film member and the flow path forming body are welded along the opening.

(3) In the seal structure according to the above aspect, the flow path forming member includes a first projecting wall that is the projecting wall, and a second projecting wall that extends outward from the flow path from the other end of the welding projection. And a second projecting wall for receiving the welding sag. According to the seal structure of this aspect, it is possible to receive the welding sag even from the other end of the welding projection to the outside of the flow path.

(4) In the seal structure of the above aspect, the flow path forming member may further include a pressing portion that presses the seal member from the tip end side toward the base end side. According to the seal structure of this aspect, positional deviation of the seal member in the flow path is suppressed.

(5) The seal structure of the above aspect may further include a welding sag portion formed on the protruding wall. According to this aspect, there is provided the seal structure having the welding sag portion on the protruding wall.

(6) In the seal structure according to the above aspect, at least a part of the weld sag portion may be heat-welded to the film member. According to this aspect, the welded area of the film member can be increased.

(7) In the seal structure of the above aspect, the film member may not be heat-welded to the seal member. According to this aspect, since the seal member is not welded, welding sagging does not occur from the seal member.

(8) According to another aspect of the present disclosure, there is provided a liquid lead-out section that is provided in a liquid container for containing a liquid therein and that forms a flow path for leading out the liquid. The liquid lead-out portion is a pre-welding flow passage forming member that forms the flow passage, and has a front end portion having an opening and a base end portion that faces the front end portion. And a seal member arranged in the flow path, wherein the pre-welding flow path forming member is a welding projection protruding in the opening direction of the opening of the flow path and covers the opening. A welding projection for heat-sealing the film member, and a projecting wall extending inward of the flow path from the other end on the base end side of the welding projection for receiving welding sag. And a projecting wall of. According to the liquid lead-out portion of this aspect, the pre-welding flow path forming member has a projecting wall that extends inward of the flow path from the other end of the welding projection and that receives the welding sag. . When the projecting wall is provided, the gap formed between the welding projection and the seal member is larger than when the projecting wall is not provided. For this reason, even when welding sagging occurs due to thermal welding between the film member and the liquid outlet, the welding sagging flows into the gap formed by the protruding wall. As a result, it is possible to prevent the welding sag from reaching the seal member, so that the possibility of the sealing member deforming due to the welding sag is reduced. Therefore, it is possible to suppress the occurrence of defective sealing due to the deformation of the seal member.

(9) In the liquid lead-out portion of the above aspect, the protrusion length of the welding projection may be 5 times or more the thickness of the film member. According to the liquid lead-out portion of this aspect, when the position of the tip of the welding protrusion is the same, the gap between the protrusion of the welding protrusion is less than 5 times the thickness of the film member It is easy to increase the size of 68 in the opening direction.

(10) In the liquid lead-out portion of the above aspect, the pre-welding flow path forming member may have a protruding portion that protrudes from the welding protrusion to the tip end side. According to the liquid lead-out portion of this aspect, by bending the protrusion toward the seal member, the protrusion can press the seal member from one end to the other end of the flow path. Therefore. The positional deviation of the seal member in the flow path is suppressed.

(11) According to another aspect of the present disclosure, a method of sealing a liquid lead-out portion is provided. This sealing method is a liquid lead-out portion that is provided in a liquid container for containing a liquid therein and forms a flow path for leading out the liquid, and forms a pre-welding flow path that forms the flow path. A member, comprising: a pre-welding flow passage forming member having a tip end portion having an opening formed therein, a base end portion facing the tip end portion, and a seal member arranged in the flow passage, The pre-welding flow path forming member is a welding projection that protrudes in the opening direction of the opening of the flow path, and a welding projection for thermally welding a film member for covering the opening, and the welding A projecting wall extending inward of the flow path from the other end on the base end side of the projecting projection, and a projecting wall for receiving a welding sag; A projection for welding the film member so as to cover the opening. Comprising a disposing step of disposing the, after the disposing step, by the said welding protrusion and the film member thermally welded, and a mounting step for mounting the film member to said prefuser flow path forming member. According to the sealing method of this aspect, the flow path forming member has a projecting wall that extends from the other end of the welding projection toward the inside of the flow path and that receives the welding sag. Therefore, the welding sag caused by the thermal welding between the film member and the liquid lead-out portion is received by the protruding wall. This reduces the possibility that the seal member will be deformed due to welding sag. Therefore, the occurrence of a sealing failure due to the deformation of the seal member during heat welding is suppressed.

(12) In the sealing method according to the above aspect, the pre-welding flow path forming member further includes a protrusion that further protrudes from the welding protrusion in the opening direction, and the sealing method further includes the film member. Before the step of disposing on the welding projection, a pressing step of pressing the seal member from the tip end side toward the base end side by bending the protrusion toward the seal member is provided. May be. According to the sealing method of this aspect, the positional deviation of the seal member in the flow path is suppressed.

  The present disclosure can be realized in various forms other than the seal structure, the liquid lead-out portion, and the sealing method. For example, it can be realized in the form of a liquid container or a container, a manufacturing method thereof, or the like.

    10 ... Liquid ejection device, 20 ... Medium, 30 ... Mounting part, 32 ... Head, 34 ... Carriage, 36 ... Driving mechanism, 38 ... Tube, 39 ... Conveying mechanism, 40 ... Case, 42 ... Section, 44 ... Adapter section, 56 ... Flow path, 60 ... Liquid derivation part, 61 ... Flow path forming member, 62 ... Welding projection, 62A ... Tip part, 62B ... Other end part, 64 ... Projection wall, 66A ... Projection part, 66B ... Pressing part, 68 ... Gap, 70 ... Sealing member, 72 ... Opening part, 72A ... Tip part, 72B ... Base end part, 80 ... Valve body, 90 ... Control part, 92 ... Welding drip part, 100 ... Liquid container, 102 ... Liquid Container, 600 ... Seal structure, 642 ... First protruding wall, 644 ... Second protruding wall

Claims (12)

A seal structure for a liquid container,
A liquid lead-out portion having a flow path for leading out a liquid in the liquid container, comprising (i) a tip end portion having an opening, and a base end portion facing the tip end portion, A liquid lead-out portion having a flow path forming member forming a flow path, and (ii) a seal member arranged in the flow path,
A film member covering the opening,
The flow path forming member is a welding projection that is heat-welded to the film member, and a protruding wall that extends inward of the flow path from the other end of the welding projection on the base end side. A protruding wall for receiving the welding sag,
Seal structure. The seal structure according to claim 1, wherein
The sealing structure, wherein the welding projection is formed along the outer periphery of the opening. The seal structure according to claim 1 or claim 2,
The flow path forming member is a first protruding wall that is the protruding wall,
A second projecting wall extending from the other end of the welding projection toward the outside of the flow path, the second projecting wall receiving the welding sag.
Seal structure. The seal structure according to any one of claims 1 to 3,
The flow passage forming member further includes a pressing portion that presses the sealing member from the tip end side toward the base end side. The seal structure according to any one of claims 1 to 4, further comprising:
A seal structure having a welding sag portion formed on the protruding wall. The seal structure according to claim 5, wherein
At least a part of the welding sag portion is heat-welded to the film member, and a seal structure. The seal structure according to any one of claims 1 to 6, wherein:
The seal structure, wherein the film member is not heat-welded to the seal member. A liquid lead-out portion which is provided in a liquid container for containing a liquid therein and which forms a flow path for leading out the liquid,
A pre-welding flow channel forming member that forms the flow channel, the pre-welding flow channel forming member having a tip end portion having an opening formed therein and a base end portion facing the tip end portion.
A seal member arranged in the flow path,
The pre-welding flow path forming member is a welding projection protruding in the opening direction of the opening of the flow path, and a welding projection for thermally welding a film member for covering the opening, A projecting wall extending inward of the flow path from the other end of the welding projection on the side of the base end, and a projecting wall for receiving welding sag,
Liquid outlet. The liquid lead-out section according to claim 8,
The liquid lead-out portion, wherein the protrusion length of the welding projection is 5 times or more the thickness of the film member. The liquid outlet part according to claim 8 or 9,
The pre-welding flow path forming member is a liquid lead-out portion having a protrusion that protrudes from the welding protrusion toward the tip end portion. A method for sealing a liquid outlet,
A liquid lead-out portion which is provided in a liquid container for containing a liquid therein and forms a flow path for leading out the liquid, which is a pre-welding flow path forming member forming the flow path, A pre-welding flow path forming member having a front end portion having an opening formed therein and a base end portion facing the front end portion; and a seal member arranged in the flow path, The member is a welding projection that protrudes in the opening direction of the opening of the flow path, and a welding projection for thermally welding a film member for covering the opening, and the base in the welding projection. A projecting wall extending from the other end on the end side toward the inside of the flow channel, the projecting wall for receiving welding sag, and a preparatory step of preparing a liquid outlet,
An arranging step of arranging a film member on the welding projection so as to cover the opening,
After the arranging step, an attaching step of attaching the film member to the pre-welding flow path forming member by thermally welding the film member and the welding protrusion to each other. The sealing method according to claim 11, wherein
The pre-welding flow path forming member further has a protrusion that further protrudes from the welding protrusion in the opening direction,
In the sealing method, further, before the step of disposing the film member on the welding projection, by bending the protruding portion toward the sealing member, the sealing member is moved from the tip end side to the base end. A sealing method comprising a pressing step of pressing toward a section side.

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