Synthetic resin injection tool with valve

Abstract

To provide a synthetic resin spouting tool with a valve which can improve stable holding property of a valve in a cap while suppressing cost.SOLUTION: A synthetic resin spouting tool with a valve has a body and a valve having a discharge port, and is mounted on a mouth part of a container, wherein the body includes a top surface wall, and a spouting cylinder that is erected from the top surface wall, and has a cylindrical body, a flange surface extending inward from the cylindrical body, an engagement wall part that is suspended from the inner peripheral side of the flange surface and can hold the valve, and a flap part that is provided on the inner surface of the cylindrical body and can be rotated with a hinge connection part as a base point, and the valve is press-fitted to a storage space formed among the engagement wall part of the cylindrical body, the flange surface and the flap part, and is included in the spouting cylinder.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a synthetic resin pouring tool with a valve that can be attached to the mouth of a container, for example.

Background Art

[0002] For example, containers for storing liquid contents such as seasonings and detergents and caps with slit valves are known. Such a slit valve is provided with a slit as a discharge port in a relatively soft resin material such as rubber. On the other hand, for the container, a resin material harder than the above-described slit valve, such as PET (polyethylene terephthalate) resin, is applied, for example.

[0003] The above-described cap with a slit valve is manufactured by incorporating the valve into the cap because the cap and the valve are composed of separate members. For example, in Patent Document 1, a three-piece (3-piece) cap with a valve in which a valve (self-closing discharge nozzle 25) is fitted to a cap body 7 via an annular side wall restraint 18 has been proposed.

[0004] Further, Patent Document 2 discloses a cap with a valve composed of two parts (2 pieces) as compared with the three-piece configuration disclosed in Patent Document 1. More specifically, in Patent Document 2, the slit valve has an outer surface as a concave spherical portion, a slit formed in the center with an end surrounded by a reinforcing rib, and an orifice forming wall formed with a flap, and the cap includes a cap base body to which the slit valve is attached and screwed to the container mouth cylinder portion, and a cover lid fitted to the cap base body. The cover lid has a pressing surface and a protruding portion that engage with the periphery of the orifice forming wall on its lower surface, and is configured to engage with the orifice forming wall when the cover lid is closed, and increase the curvature of the surface of the orifice forming wall to open the slit. A cap with a valve has been proposed.

Prior Art Documents

Patent Documents

[0005] Patent Document 1 Utility Model Registration Gazette No. 2515730 Patent Document 2 Japanese Patent Application Laid-Open No. 11-011502 Summary of the Invention Problems to be Solved by the Invention

[0006] In the prior art including the structures proposed in the above-mentioned patent documents, the market needs are not yet satisfied and the following problems exist. That is, first, in the three-piece type cap with a valve exemplified in Patent Document 1, since additional parts are required for valve fixing in the first place, the cost increases due to the larger number of parts constituting the cap. Further, due to the larger number of parts, it is necessary to more strictly manage the dimensional tolerances of each part, and there are also problems such as being more likely to become complicated compared to the two-piece type cap with a valve.

[0007] On the other hand, if a two-piece type cap with a valve exemplified in Patent Document 2 is used, although it is effective in that the number of parts can be reduced compared to the three-piece type, the valve holding structure shown in this Patent Document 2 has a problem of lacking stability in holding the valve inside the cap. In this regard, particularly depending on the type of container, there is also a form in which the container is pressed (squeezed) to discharge the contents, and in such a case, it is necessary to avoid the valve shifting inside the cap due to the influence of the discharge pressure.

[0008] As described above, there is still room for improvement in the prior art including the above-mentioned patent documents. As an example of the object of the present invention, it is possible to provide a synthetic resin pouring tool with a valve that can improve the stable holding property of the valve in the cap while suppressing the cost in a synthetic resin pouring tool with a valve that holds a valve in which a discharge port such as a slit is formed. Means for Solving the Problems

[0009] In order to solve the above problems, a synthetic resin pouring tool with a valve according to one embodiment of the present invention is a synthetic resin pouring tool with a valve that has (1) a main body and a valve having a discharge port and is attached to the mouth of a container. The main body includes a top wall, a cylindrical body that stands upright from the top wall, a flange surface that extends inward from the cylindrical body, a locking wall portion that hangs down from the inner peripheral side of the flange surface and can hold the valve, and a flap portion that is provided on the inner surface of the cylindrical body and is rotatable about a hinge connection portion as a pivot point. The valve is press-fitted into an accommodation space formed between the locking wall portion, the flange surface, and the flap portion of the cylindrical body and is enclosed within the pouring cylinder. This is the characteristic.

[0010] In the synthetic resin pouring tool with a valve described in the above (1), it is preferable that (2) a flap accommodation space capable of accommodating the flap portion is provided on the inner wall of the pouring cylinder.

[0011] Also, in the synthetic resin pouring tool with a valve described in the above (2), it is preferable that (3) the flap portion rotates about the hinge connection portion while the upper surface of the valve and the flap portion are in contact, so that the valve is accommodated in the accommodation space and the flap portion is accommodated in the flap accommodation space.

[0012] Furthermore, in the synthetic resin pouring tool with a valve described in the above (3), it is preferable that (4) the flap portion includes a locking protrusion portion that protrudes from the side surface of the flap portion.

[0013] Also, in the synthetic resin pouring tool with a valve described in the above ( 4 ), it is preferable that (5) when the flap portion is accommodated in the flap accommodation space, the upper surface of the locking protrusion portion is disposed below the lower end of the locking wall portion in the axial direction of the cylindrical body.

[0014] And in the synthetic resin pouring tool with a valve according to any one of (1) to (5) described above, (6) the valve has an annular base portion that can be accommodated in the accommodation space, a top plate portion in which the discharge port is formed, and a thin and flexible connecting portion that connects the inner peripheral side of the base portion and the top plate portion. It is preferable that the upper surface of the base portion is in contact with the bottom portion of the locking wall portion.

[0015] Further, the synthetic resin pouring tool with a valve according to any one of (1) to (6) described above, (7) the valve has an annular base portion that can be accommodated in the accommodation space, a top plate portion in which the discharge port is formed, and a thin and flexible connecting portion that connects the inner peripheral side of the base portion and the top plate portion, and it is preferable that the upper portion of the inner side surface of the base portion is close to the inner peripheral surface of the locking wall portion.

[0016] Also, the synthetic resin pouring tool with a valve according to ( 4 ) described above, (8) the valve has an annular base portion that can be accommodated in the accommodation space, a top plate portion in which the discharge port is formed, and a thin and flexible connecting portion that connects the inner peripheral side of the base portion and the top plate portion, and it is preferable that the bottom surface of the base portion is in contact with the upper surface of the locking projection portion.

[0017] Further, the synthetic resin pouring tool with a valve according to any one of (1) to (8) described above, (9) the valve has an annular base portion that can be accommodated in the accommodation space, a top plate portion in which the discharge port is formed, and a thin and flexible connecting portion that connects the inner peripheral side of the base portion and the top plate portion, and it is preferable that the outer side surface of the base portion is in contact with the outer surface of the flap portion.

[0018] Also, the synthetic resin pouring tool with a valve according to any one of (2) to (5) described above, (10) it is preferable that the plate thickness of the flap portion is equal to or less than the radial width in the flap accommodation space.

[0019] Further, the synthetic resin pouring tool with a valve according to any one of (1) to (10) described above, (11) it is preferable that a plurality of the flap portions and the hinge connecting portions are intermittently formed along the circumferential direction on the inner wall of the pouring cylinder.

[0020] In addition, in the resin injection tool with a valve described in the above (11), it is preferable that the tip portions of the plurality of adjacent flap portions are connected to each other via a connecting strap.

Advantages of the Invention

[0021] According to the resin injection tool with a valve of the present invention, since it is composed of two pieces, namely the main body and the valve, the cost can be relatively suppressed. Moreover, since the valve is enclosed between the locking wall portion and the locking projection portion of the cylindrical body, the valve can be stably held within the cap.

Brief Description of the Drawings

[0022]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Embodiment for Carrying Out the Invention

[0023] Hereinafter, embodiments for preferably implementing the present invention will be described. In this embodiment, for convenience of explanation, the X, Y, and Z directions are appropriately set in the explanation using the drawings. However, this is for convenience of explanation and does not overly limit the present invention in any way. In addition, regarding components other than those described in detail below, structures of known containers and slit valves including the above-mentioned patent documents can be appropriately incorporated.

[0024] ≪Synthetic resin pouring tool 300 with a valve≫ While referring to FIGS. 1 to 8, the structure of the synthetic resin pouring tool 300 with a valve according to this embodiment will be described in detail. As shown in FIGS. 1 to 3 and the like, the synthetic resin pouring tool 300 with a valve according to this embodiment has a main body 100 and a valve 200 having a discharge port Dp, and is configured to be attachable to the mouth of a container (not shown). As an attachment mode of the synthetic resin pouring tool 300 with a valve to the mouth of the above-mentioned container, for example, in addition to screwing using a screw described later, other known attachment methods such as a plug-in fitting may be applied.

[0025] Here, as a container suitable for this embodiment, there is no particular limitation as long as it can store a liquid content. For example, various known container forms such as relatively rigid containers such as PET bottles and soft and flexible containers such as pouches can be exemplified. In addition, as the material of the container, for example, polyester resins such as polyethylene terephthalate (PET) resin, olefin resins such as polyethylene resin, or known rubber materials are suitable, but there is no particular limitation and various known materials can be applied. Note that the material of the container may have a structure in which the above-mentioned resin materials and the like are laminated.

[0026] The liquid contents stored in the above-described container are not particularly limited, and for example, various known liquids such as detergents, seasonings, or soft drinks such as water and tea can be applied. Further, as the contents stored in the above-described container, instead of the various liquids described above, known semi-solid materials in a gel form such as jelly may be applied.

[0027] <Main body 100> Next, while referring to the drawings, the configuration of the main body 100 that constitutes the above-described synthetic resin pouring tool 300 with a valve will be described in detail. As understood from FIG. 1 and the like, the main body 100 of the present embodiment includes a top wall 10, a pouring cylinder 20 erected from the top wall 10, and a known skirt wall 30 hanging down from the periphery of the top wall 10.

[0028] As an example of the material of the main body 100, a resin that is relatively hard compared to the valve, such as PET resin, can be exemplified. As illustrated in FIG. 6 and the like, a known inner ring 11 is provided on the bottom surface side of the top wall 10, and the mouth portion of the above-described container can be sealed through this inner ring 11.

[0029] As shown in FIGS. 4 to 8 and the like, the pouring cylinder 20 includes a cylinder body 21, a flange surface 22, a locking wall portion 23, a flap portion 24, and the like. The cylinder body 21 is a hollow cylindrical portion that rises so as to extend vertically upward (in the Z direction) from the above-described top wall 10. As shown in FIGS. 1 and 3 and the like, it is preferable that the outer peripheral surface 21b of the cylinder body 21 is erected so as to gradually decrease in diameter from the lower end, which is the connection portion with the top wall 10, toward the upper end (the flange surface 22 described later). Note that the cylinder body 21 in the present embodiment is not limited to the form in which the diameter decreases upward as shown in FIGS. 1 and 3, and may have a cylindrical outer shape that stands upright from the top wall 10 without the outer peripheral surface 21b decreasing in diameter.

[0030] The flange surface 22 is a portion that extends inward (toward the center side at the opening of the cylindrical body 21) from the above-described cylindrical body 21. More specifically, the flange surface 22 of the present embodiment is provided so as to extend inward from the upper end of the cylindrical body 21 as a starting point.

[0031] As shown in FIGS. 6 to 8 for example, the locking wall portion 23 is provided so as to hang downward from the inner peripheral side of the above-described flange surface 22 toward the lower side (in the Z direction). As can be understood from these figures, the locking wall portion 23 is provided so as to be located inward by a predetermined distance from the cylindrical body 21 via the flange surface 22. As is clear from the figure, when viewed from above in the Z direction, the locking wall portion 23 is positioned closer to the center side (that is, the top plate portion 220 side) than the tip of the locking projection portion 25 of the flap portion 24 when the flap portion 24 is housed in the flap housing space FCS described later. As will be described later, the locking wall portion 23 of the present embodiment is configured to be able to hold the above-described valve 200 at least via the bottom surface 23a of the locking wall portion 23.

[0032] The flap portion 24 is provided on the inner surface 21a of the above-described cylindrical body 21 and is configured to be rotatable about the hinge connection portion 24a as a pivot point. Further, as can be understood by referring to FIGS. 3 and 8 together, a flap housing space FCS capable of housing the above-described flap portion 24 is provided on the inner wall of the pouring cylinder 20 in the present embodiment (specifically, the inner surface 21a of the cylindrical body 21). Thereby, when the valve 200 is incorporated into the main body 100 of the valve 200, the flap portion 24 rotates about the hinge connection portion 24a while the upper surface of the valve 200 and the flap portion 24 are in contact with each other, so that the valve 200 is housed in the housing space CS and the flap portion 24 is housed in the flap housing space FCS.

[0033] Further, as shown in FIGS. 3 and 8 for example, a locking projection portion 25 that protrudes from the outer surface 24b of the flap portion 24 (the surface opposite to the inner surface housed in the flap housing space FCS) and can support the bottom surface 210e of the base portion 210 of the valve 200 is provided. The locking projection 25 is provided so as to project radially inward from the inner surface 21a of the cylindrical body 21 when the flap portion 24 is housed in the flap housing space FCS, as shown in FIGS. 3, 7, 8, etc. And as will be described later, the locking projection 25 of the present embodiment is configured to be able to hold the valve 200 via at least the upper surface 25a of the locking projection 25. As shown in FIG. 8, the plate thickness t of the flap portion 24 (the surface in close contact with the outer surface of the valve 200) is preferably not more than the radial width d in the flap housing space FCS described above.

[0034] As shown in FIG. 5, a plurality of the flap portions 24 and the hinge connecting portions 24a of the present embodiment are intermittently formed along the circumferential direction on the inner wall of the pouring cylinder 20 described above. Thus, it is preferable that the above-described flap portion 24 (and further the locking projection 25) is intermittently formed in a plurality of positions in the circumferential direction (θz direction) on the inner surface 21a of the cylindrical body 21. More specifically, as shown in FIG. 5 etc., in the present embodiment, six flap portions 24 and locking projections 25 are provided on the inner surface 21a of the cylindrical body 21 intermittently along the circumferential direction (around the Z axis, θz direction). In the present embodiment, six flap portions 24 and locking projections 25 are provided along the circumferential direction, but the present invention is not limited to this mode, and for example, at least two flap portions 24 and locking projections 25 other than six may be used. Further, the locking projection 25 is not essential and may be appropriately omitted as long as the bottom surface of the valve 200 can be held.

[0035] Also, in the present embodiment, as shown in FIG. 5, when viewed from the bottom side of the main body 100, the flap portions 24 (and the locking projection portions 25) are provided at equal intervals in the circumferential direction. Further, as can be understood from FIG. 5, in the present embodiment, the plurality of flap portions 24 may be arranged in the circumferential direction such that each is symmetric with respect to the discharge port Dp of the top plate portion 220 (that is, in a relationship where another flap portion 24 is arranged on the opposite side of a certain flap portion 24 with respect to the discharge port Dp as a reference point). Note that the present embodiment is not limited to the above form. For example, at least some of the plurality of flap portions 24 may be provided at unequal intervals in the circumferential direction such that the interval between any two of the plurality of flap portions 24 is different from the other intervals.

[0036] Thus, in the present embodiment, an accommodation space CS capable of accommodating the valve 200 is formed between the inner surface 21a of the cylindrical body 21, the bottom surface of the flange surface 22, the bottom surface 23a and the inner circumferential surface 23b of the locking wall portion 23, and the flap portion 24 (and further the upper surface 25a of the locking projection portion 25). And the valve 200 of the present embodiment is press-fitted into the accommodation space CS formed between the locking wall portion 23, the flange surface 22, and the flap portion 24 of the cylindrical body 21 via, for example, a press-fitting jig described later and is included in the pouring cylinder 20.

[0037] Therefore, as can be understood from FIG. 8, for example, it is preferable that the upper surface 25a of the above-described locking projection portion 25 is arranged downward in the axial direction (Z direction) of the cylindrical body 21 with respect to the lower end (bottom surface 23a) of the above-described locking wall portion 23 when the above-described flap portion 24 is accommodated in the flap accommodation space FCS. Thereby, the bottom portion (bottom surface 23a) of the above-described locking wall portion 23 can come into contact with the base portion 210 (upper surface 210a) of the valve 200 to form a seal point described later.

[0038] <Valve 200> Next, with reference to the drawings, the configuration of the valve 200 constituting the above-described synthetic resin pouring tool 300 with a valve will be described in detail. As understood from FIG. 2 and the like, the valve 200 of the present embodiment includes a base portion 210, a top plate portion 220, and a thin flexible portion 230. Examples of the material of the valve 200 include natural or synthetic rubber materials, and soft olefin resins such as polyethylene.

[0039] As understood from FIG. 3 and the like, the base portion 210 is an annular portion having an outer shape that can be accommodated in the accommodation space CS in the above-described main body 100. In the present embodiment, when the valve 200 is press-fitted into the accommodation space CS of the main body 100, as shown in FIG. 8, the bottom portion (bottom surface 23a) of the locking wall portion 23 of the main body 100 and the upper surface 210a of the base portion 210 come into contact with each other to form a seal point (a point where they are in close contact with each other to form a sealing action). Therefore, it is preferable that the base portion 210 has a volume sufficient to press the lower end (bottom surface 23a) of the locking wall portion 23 when the valve 200 is press-fitted into the accommodation space CS.

[0040] The top plate portion 220 is a disc-shaped portion disposed inside the above-described annular base portion 210 (inside the ring). As shown in FIG. 2, a discharge port Dp for discharging the contents stored in the container is provided at the center of the top plate portion 220. As such a discharge port Dp, for example, a known discharge port structure capable of discharging a liquid content, such as a cross-shaped slit or micropores, may be applied.

[0041] As understood from FIG. 2 and the like, the thin flexible portion 230 is a portion that connects the inner peripheral side of the base portion 210 and the top plate portion 220. As is clear from the figure, the thin flexible portion 230 is interposed between the base portion 210 and the top plate portion 220 so as to be annular along the inner circumference of the base portion 210. As a cross-sectional shape, after extending inward from the upper surface 210a of the base portion, it hangs down so as to connect to the upper surface of the outer peripheral edge portion of the top plate portion 220. The top plate portion 220 is supported by the thin flexible portion 230, thereby allowing vertical movement and enabling the discharge of the liquid content through the discharge port Dp.

[0042] <Support mode of the valve 200 in the accommodation space CS> Next, while also referring to FIGS. 6 to 8, the support mode of the valve 200 in the accommodation space CS will be described. As described above, for example, in the case of a container for storing seasonings, detergents, etc., or a case where the spout is a pouring tool, it may be required to squeeze the container to pour out the contents. In such a case, it is necessary to avoid the valve 200 shifting from the accommodation space CS in the main body 100 due to the influence of the pressure when squeezing.

[0043] Therefore, in the present embodiment, a configuration is adopted in which the valve 200 is included in the accommodation space CS formed between at least the flange surface 22, the locking wall portion 23, the flap portion 24, and the locking protrusion portion 25 in the pouring cylinder 20. Note that "the valve 200 is included in the accommodation space CS" in the present embodiment means a support form in which the valve 200 is pressed into the accommodation space CS so as to be sandwiched from at least the upper and lower sides (the end portions in the ±Z directions in FIG. 6, and in the drawing, the top side and the bottom side of the base portion 210). Thereby, it is possible to greatly improve the stability retention of the valve 200 in the main body 100.

[0044] More specifically, as understood from FIGS. 6 to 8 and the like, in the valve 200 in the present embodiment, it is preferable that the upper portion 210g on the inner side surface (the side closer to the thin-walled flexible portion 230) of the base portion 210 is close to the inner peripheral surface 23b of the above-described locking wall portion 23. In the present embodiment, as described above, the upper portion 210g and the inner peripheral surface 23b are in a close proximity form, but they may be in a form of being in close contact. That is, the positional relationship between the upper portion 210g and the inner peripheral surface 23b in the present embodiment includes a form in which they are close to each other and have a gap of about several millimeters, and also includes a form in which they are in close contact including the state of forming the above-described seal point.

[0045] Also, as can be understood from the figure, it is preferable that at least the bottom surface 210e1 of the base 210 in the present embodiment is in contact with the upper surface 25a of the locking projection 25 of the cylindrical body 21. This can prevent the valve 200 from accidentally falling vertically downward (-Z direction). In the present embodiment, a form is shown in which at least a part (bottom surface 210e1) of the bottom surface of the base 210 is supported from below by the locking projection 25, but a form in which the entire bottom surface of the base 210 (in this example, the bottom surface 210e1 and the bottom surface 210e2) is supported from below by the locking projection 25 may also be used. Further, the contact mode between the bottom surface 210e1 of the base 210 and the upper surface 25a of the locking projection 25 does not necessarily have to be a close contact state in which a seal point is formed.

[0046] Also, as can be understood from the figure, it is preferable that the outer surface 210d (at least the lower part 210d1 of the outer surface 210) of the base 210 in the present embodiment is in contact with the outer surface 24b of the flap portion 24 of the cylindrical body 21. Thereby, the seal point described above can also be formed between the lower part 210d1 of the outer surface 210d of the base 210 and the outer surface 24b of the flap portion 24. Further, this can prevent the valve 200 from accidentally shifting in the horizontal direction (XY plane direction) in cooperation with the locking wall portion 23.

[0047] In the present embodiment, a form is shown in which at least a part (the lower part 210d1 of the outer surface 210) of the outer surface of the base 210 is laterally supported by the outer surface 24b of the flap portion 24 of the cylindrical body 21, but a form in which the entire outer surface of the base 210 (in this example, the lower part 210d1 of the outer surface 210 and the upper part 210d2 of the outer surface 210) is laterally supported by the inner surface 21a of the cylindrical body 21 and the outer surface 24b of the flap portion 24 may also be used. That is, in the present embodiment, there is a predetermined gap between the upper outer surface 210d2 of the outer surface of the base 210 and the inner surface 21a of the cylindrical body 21, but the present invention is not limited to this mode, and they may be in contact with each other.

[0048] Also, as can be understood from the figure, it is preferable that the top 210b of the base 210 of the valve 200 in the present embodiment is close to the bottom surface of the flange surface 22 of the above-described cylindrical body 21. In the present embodiment, as described above, the top 210b and the bottom surface of the flange surface 22 are in a state of being close to each other, but they may be in a state of being in close contact. That is, the positional relationship between the top 210b and the bottom surface of the flange surface 22 in the present embodiment includes not only a state in which they are close to each other and have a gap of about several millimeters, but also a state in which they are in close contact including the state of forming the above-described seal point.

[0049] <Method of attaching the valve 200 to the main body 100> Next, with reference to FIG. 9 as well, an example of the manufacturing method of the synthetic resin injection tool 300 with a valve in the present embodiment, that is, a method of incorporating the valve 200 into the main body 100 using a press-fitting jig will be described. That is, as can be understood from the figure, when press-fitting the valve 200 into the accommodation space CS of the main body 100, a press-fitting jig (not shown) capable of pushing up the bottom surface of the valve 200 may be used.

[0050] At this time, in the state before press-fitting the valve shown in FIG. 9(a), the flap portion 24 is in a state of being separated from the flap accommodation space FCS with the hinge connecting portion 24a as a base point. Then, when the valve 200 is pushed up with the above-described press-fitting jig or the like toward the flap accommodation space FCS, the outer upper portion 210c of the base 210 and the outer surface 24b of the flap portion 24 come into contact.

[0051] Next, when the valve 200 is further pushed up toward the flap accommodation space FCS, the flap portion 24 rotates around the hinge connecting portion 24a and the locking projection portion 25 also comes into contact with the base 210. Finally, the flap portion 24 is accommodated in the flap accommodation space FCS and the valve 200 is accommodated in the accommodation space CS, resulting in the press-fitting completion state shown in FIG. 9(b).

[0052] As can be understood by also referring to FIG. 8, it is preferable that the outer upper portion 210c of the base 210 in the present embodiment constitutes a tapered inclined surface IS that gradually decreases in diameter toward the inside in the radial direction upward (toward the top portion 210b). Thereby, when the valve 200 is press-fitted so as to be pushed upward toward the accommodation space CS, the flap portion 24 can be pivoted through the hinge connection portion 24a in an appropriate direction.

[0053] <Modification Example 1> Next, the main body 110 according to Modification Example 1 applicable to the above-described embodiment will be described with reference to FIG. 10. In the main body 100 of the above-described embodiment, the plurality of flap portions 24 were each configured to be pivotable via the hinge connection portion 24a independently of each other. In contrast, the main body 110 according to Modification Example 1 is mainly characterized in that, in addition to the main body 100 of the above-described embodiment, it further includes a connecting strap 26. Therefore, hereinafter (similarly for Modification Example 2 described later), the same reference numerals will be given to the already described configurations and the description thereof will be omitted as appropriate.

[0054] That is, as shown in FIG. 10, in the main body 110 of Modification Example 1, the tip portions of the plurality of adjacent flap portions 24 are connected by the above-described connecting strap 26. Thereby, when the valve 200 is press-fitted and accommodated in the accommodation space CS, the plurality of flap portions 24 can pivot via the hinge connection portion 24a substantially synchronously, and it is possible to prevent any one of the flap portions 24 from being unable to pivot and resulting in a poor press-fitting.

[0055] Such a connecting strap 26 may be in a mode of connecting adjacent flap portions 24 so that the tips on the side opposite to the hinge connection portion 24a of the flap portions 24 are connected to each other as described above, or may be in a mode of being connected other than the tips. Also, the connecting strap 26 preferably has an appropriate curved portion such as a U shape or a V shape so as not to hinder the above-described pivoting of the flap portion 24. Further, the connecting strap 26 may be integrally formed with the flap portion 24, for example, during the injection molding of the main body 110, or the connecting strap 26 may be separately formed and then joined to the flap portion 24 by a known adhesive or fusion method.

[0056] <Modification 2> ≪Synthetic resin pouring tool 310 with valve≫ Next, with reference to FIGS. 11 and 12, the synthetic resin pouring tool 310 with valve in the present embodiment will be described. The synthetic resin pouring tool 310 with valve in this example is mainly characterized in that, compared with the above-described synthetic resin pouring tool 300 with valve, it has an outer ring wall 40 that is disposed radially outward with a predetermined gap from the skirt wall 30 and hangs down from the top surface wall 10, and further includes a hinge cap 50 that is connected to the outer ring wall 40 via a hinge connection portion 53. Therefore, the same reference numerals are given to the above-described configurations, and the description thereof will be omitted as appropriate.

[0057] As shown in these figures, the outer ring wall 40 hangs down from the peripheral edge of the top surface wall 10, and the skirt wall 30 is disposed inside the outer ring wall 40 so as to form a double wall. Further, an annular protrusion 12 having a hook portion 12f is provided on the upper surface peripheral edge of the top surface wall 10. Thereby, it is possible to engage with an undercut 52a provided inside the peripheral wall 52 of the hinge cap 50 to close the pouring cylinder 20.

[0058] That is, the hinge cap 50 is configured to include an annular wall 54 and a sealing cylinder 55 that respectively hang down from the top wall 51. Therefore, when the undercut 52a of the hinge cap 50 engages with the hook portion 12f, the inner peripheral surface of the annular wall 54 is in close contact with the outer peripheral surface 21b of the cylinder body 21, and the tip of the sealing cylinder 55 can close the discharge port Dp provided in the top plate portion 220.

[0059] As shown in these figures, the hinge cap 50 may be provided with a known bridge portion 56 and notches 58a and 58b capable of maintaining the open state of the hinge cap 50. Further, as shown in the same figure, a protruding portion 57 protruding radially outward may be provided on the side of the hinge cap 50 opposite to the hinge connection portion 53 so that a user can easily hook a finger or the like.

[0060] According to the present embodiment described above, since the pouring tool is configured by two pieces of the main body 100 and the valve 200, it is possible to suppress the cost in terms of materials as compared with the conventional three-piece structure. In addition, according to the present embodiment, for example, the valve 200 is encapsulated while sandwiching the valve 200 including the inner surface 21a while sandwiching between the locking wall portion 23 of the cylindrical body 21 and the locking protrusion portion 25 of the flap portion 24. Therefore, it is possible to hold the valve 200 much more stably in the accommodation space CS as compared with the conventional structure.

[0061] The above-described embodiment is an example, and various modifications are possible without departing from the spirit of the present application. For example, the screw portion 31 formed inside the skirt wall 30 in the main body 100 may be omitted and a known undercut may be provided so that the main body 100 is plugged into the mouth portion of the container.

[0062] Further, the above-described synthetic resin pouring tool 300 with a valve is not limited to a cap that can be attached to the above-described container by screwing or plugging, and may be in the form of a spout (drinking mouth) that can be attached to a known pouch, for example.

Industrial Applicability

[0063] The present invention is suitable for realizing a synthetic resin pouring tool with a valve that achieves both low cost and high stability in holding the valve.

Explanation of Reference Numerals

[0064] 100, 110 Main body 10 Top surface wall 20 Pouring cylinder 30 Skirt wall 40 Outer ring wall 50 Upper lid 200 Valve 210 Base 220 Top plate part 230 Thin-walled flexible part 300, 310 Synthetic resin pouring tool with valve

Claims

1. A resin pouring tool with a valve, which is attached to the mouth of a container and has a main body and a valve with a discharge port, wherein the main body has a top wall, a cylindrical body that stands upright from the top wall, a flange surface that extends inward from the cylindrical body, a locking wall portion that hangs down from the inner peripheral side of the flange surface and can hold the valve, and a flap portion provided on the inner surface of the cylindrical body and rotatable about a hinge connecting portion as a pivot point, and includes a pouring cylinder having the above, the valve is press-fitted into an accommodation space formed between the locking wall portion, the flange surface, and the flap portion of the cylindrical body and is included in the pouring cylinder, characterized in that it is a resin pouring tool with a valve.

2. On the inner wall of the pouring cylinder, there is provided a flap accommodation space in which the flap portion can be accommodated, The resin pouring tool with a valve according to Claim 1.

3. When the upper surface of the valve and the flap portion are in contact and the flap portion rotates about the hinge connecting portion as a pivot point, the valve is accommodated in the accommodation space and the flap portion is accommodated in the flap accommodation space, The resin pouring tool with a valve according to Claim 2.

4. The flap portion is configured to include a locking protrusion portion that protrudes from the side surface of the flap portion, The resin pouring tool with a valve according to Claim 3.

5. When the flap portion is accommodated in the flap accommodation space, the upper surface of the locking protrusion portion is disposed below the lower end of the locking wall portion in the axial direction of the cylindrical body, The resin pouring tool with a valve according to Claim 4.

6. The valve has an annular base portion that can be accommodated in the accommodation space, a top plate portion in which the discharge port is formed, and a thin flexible portion that connects the inner peripheral side of the base portion and the top plate portion, the upper surface of the base portion is in contact with the bottom of the locking wall portion, The resin pouring tool with a valve according to any one of Claims 1 to 5.

7. The valve has an annular base portion that can be accommodated in the accommodation space, a top plate portion in which the discharge port is formed, and a thin flexible portion that connects the inner peripheral side of the base portion and the top plate portion, the upper portion of the inner surface of the base portion is close to the inner peripheral surface of the locking wall portion, The resin pouring tool with a valve according to any one of Claims 1 to 6.

8. The valve has an annular base that can be accommodated in the accommodation space, a top plate portion in which the discharge port is formed, and a thin flexible portion that connects the inner peripheral side of the base and the top plate portion. The bottom surface of the base is in contact with the upper surface of the locking projection. The synthetic resin injection tool with a valve according to claim 4.

9. The valve has an annular base that can be accommodated in the accommodation space, a top plate portion in which the discharge port is formed, and a thin flexible portion that connects the inner peripheral side of the base and the top plate portion. The outer surface of the base is in contact with the outer surface of the flap portion. The synthetic resin injection tool with a valve according to any one of claims 1 to 8.

10. The plate thickness of the flap portion is equal to or less than the radial width in the flap accommodation space. The synthetic resin injection tool with a valve according to any one of claims 2 to 5.

11. A plurality of the flap portions and the hinge connecting portions are intermittently formed along the circumferential direction on the inner wall of the injection cylinder. The synthetic resin injection tool with a valve according to any one of claims 1 to 10.

12. The tip portions of the plurality of adjacent flap portions are connected to each other via a connecting strap. The synthetic resin injection tool with a valve according to claim 11.

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