Synthetic resin dispensing device 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 an engagement projection part that projects to a radial inside from the inner surface of the cylindrical body and can hold the valve, 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 engagement projection part, and is included in the spouting cylinder.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a valved synthetic resin dispensing tool that can be attached to the mouth of a container, for example. [Background technology]

[0002] Containers and caps with slit valves for storing liquid contents, such as seasonings and detergents, are known. Such slit valves have a slit serving as a discharge port in a relatively soft resin material, such as rubber. On the other hand, containers are typically made of a harder resin material, such as polyethylene terephthalate (PET), compared to the slit valves.

[0003] The above-mentioned cap with a slit valve is manufactured by incorporating the valve into the cap, since the cap and the valve are configured as separate members. For example, Patent Document 1 proposes a three-piece valved cap in which a valve (self-closing discharge nozzle 25) is fitted to a cap body 7 via an annular sidewall restraint 18.

[0004] Furthermore, Patent Document 2 discloses a valved cap that is made up of two components (two pieces) compared to the three-piece configuration disclosed in Patent Document 1. More specifically, Patent Document 2 proposes a valved cap in which the slit valve has an orifice-forming wall with a spherical recess on the outer surface and a slit carved in the center with the ends surrounded by reinforcing ribs, forming a flap, the cap is made up of a cap base with the slit valve attached and screwed onto the cylindrical mouth of a container, and a cover lid that is fitted onto the cap base, the underside of the cover lid having a pressing surface and a protrusion that engages with the periphery of the orifice-forming wall, and the cover lid engages with the orifice-forming wall when the cover lid is closed, increasing the degree of curvature of the orifice-forming wall surface and opening the slit. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Utility Model Registration No. 2515730 [Patent Document 2] Japanese Patent Application Publication No. 11-011502 Summary of the Invention [Problem to be solved by the invention]

[0006] The prior art including the structures proposed in the above-mentioned patent documents has not yet satisfied market needs and has the following problems. First, the three-piece valved cap exemplified in Patent Document 1 requires an additional part to fasten the valve, which increases the cost by the number of parts that make up the cap. Also, because there are so many parts, the dimensional tolerances of each part must be controlled more strictly, which creates issues such as the cap being more complicated than a two-piece valved cap.

[0007] On the other hand, the two-piece type valve cap exemplified in Patent Document 2 is effective in that it can reduce the number of parts compared to the three-piece type, but there is a problem in that the valve retention structure shown in Patent Document 2 lacks stability in retaining the valve within the cap. In particular, for example, depending on the type of container, the container may be squeezed to dispense the contents, and in such cases, it is necessary to prevent the valve from shifting within the cap due to the influence of the discharge pressure.

[0008] As such, there is still room for improvement in the prior art, including the patent documents mentioned above, and one example of an object of the present invention is to provide a valved synthetic resin dispensing device that holds a valve with a discharge port such as a slit, and that can improve the stability of the valve within the cap while keeping costs down. [Means for solving the problem]

[0009] In order to solve the above problems, one aspect of the present invention provides a valved synthetic resin dispensing tool that is (1) a valved synthetic resin dispensing tool having a main body and a valve having a discharge port and that is attached to the mouth of a container, wherein the main body includes a top wall and a dispensing tube that is erected from the top wall and has a cylindrical body, a flange surface that extends inward from the cylindrical body, a locking wall portion that hangs down from the inner periphery of the flange surface and is capable of holding the valve, and a locking protrusion that protrudes radially inward from the inner surface of the cylindrical body and is capable of holding the valve, and the valve is press-fitted into an accommodation space formed between the locking wall portion of the cylindrical body, the flange surface, and the locking protrusion portion, and is contained in the dispensing tube. 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 periphery of the base portion and the top plate portion, and a seal point is formed by the bottom surface of the locking wall portion and the top surface of the base portion being in close contact with each other. It is characterized by the fact that

[0010] In the valved synthetic resin pouring tool described in (1) above, it is preferable that (2) the upper surface of the locking protrusion be positioned lower in the axial direction of the cylindrical body than the lower end of the locking wall.

[0011] Furthermore, in the valved synthetic resin dispensing device described in (1) or (2) above, (3) it is preferable that a plurality of openings are formed intermittently along the circumferential direction on the upper surface of the dispensing tube so as to communicate with the storage space, and that the locking protrusion portion is arranged at an axial position that coincides with at least one of the plurality of openings.

[0012] Furthermore, in the valved synthetic resin pouring tool described in any one of (1) to (3) above, (4) 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 circumferential side of the base portion and the top plate portion, It is preferable that the upper surface of the base be in contact with the bottom of the locking wall.

[0013] Furthermore, in the valved synthetic resin dispensing device described in any of (1) to (4) above, (5) 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-walled flexible portion that connects the inner periphery of the base portion to the top plate portion, and it is preferable that the upper portion of the inner surface of the base portion is close to the inner periphery of the locking wall portion.

[0014] In the valved synthetic resin dispensing device described in any of (1) to (5) 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-walled flexible portion that connects the inner periphery of the base portion to 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 protrusion portion.

[0015] Furthermore, in the valved synthetic resin dispensing device described in any of (1) to (6) 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-walled flexible portion that connects the inner periphery of the base portion to the top plate portion, and it is preferable that the outer surface of the base portion is in contact with the inner surface of the cylindrical body.

[0016] Furthermore, in the valved synthetic resin pouring device described in any of (1) to (7) above, (8) it is preferable that the lower surface of the locking protrusion constitutes part of a first inclined surface that gradually narrows radially inward toward the top on the inner surface of the cylindrical body, and the upper part of the outer surface of the base constitutes a second inclined surface that corresponds to and can come into contact with the first inclined surface when the valve is inserted into the storage space. [Effects of the Invention]

[0017] According to the valve-equipped synthetic resin dispensing device of the present invention, since it is composed of two pieces, the main body and the valve, costs can be kept relatively low, and since the valve is enclosed between the locking wall portion and the locking protrusion portion of the cylindrical body, the valve can be stably held within the cap. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is an external perspective view of a valve-equipped synthetic resin dispensing tool according to an embodiment. [Figure 2] 3 is a cross-sectional view of a valve constituting the valved synthetic resin pouring device of the embodiment. FIG. [Figure 3] 10A and 10B are schematic cross-sectional views showing the operation of assembling a valve into a main body. [Figure 4] FIG. 2 is a top view of the valve-equipped synthetic resin pouring tool according to the embodiment. [Figure 5] FIG. 2 is a bottom view of the valved synthetic resin pouring tool according to the embodiment. [Figure 6] 5 is a cross-sectional view taken along the line AA in FIG. 4. [Figure 7] 5 is a cross-sectional view of FIG. 4 taken along line B-B. [Figure 8] FIG. 8 is a partial enlarged view of the α portion in FIG. [Figure 9] 10 is a schematic diagram for explaining a method of assembling a valved synthetic resin dispensing tool using a press-fitting jig. FIG. [Figure 10] FIG. 10 is a schematic diagram of a modified synthetic resin dispensing tool with a valve. [Figure 11] FIG. 10 is a schematic diagram of a modified example of a valve-equipped synthetic resin pouring tool in an open state. DETAILED DESCRIPTION OF THE INVENTION

[0019] Hereinafter, preferred embodiments for carrying out the present invention will be described. In this embodiment, for the sake of convenience, the X, Y, and Z directions are appropriately set in the explanation using the drawings, but this is for the sake of convenience and does not excessively limit the present invention. Furthermore, for the configurations other than those described in detail below, the structures of known containers, slit valves, etc., including those described in the patent documents mentioned above, can be used as appropriate.

[0020] <Synthetic resin dispensing tool 300 with valve> The structure of the valved synthetic resin dispensing tool 300 according to this embodiment will be described in detail with reference to Figures 1 to 8. As shown in Figures 1 to 3, the valved synthetic resin dispensing tool 300 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). Note that the manner of attaching the valved synthetic resin dispensing tool 300 to the mouth of the container may be, for example, by screwing using a screw as described below, or by other known attachment methods such as a stopper fitting.

[0021] Here, the container suitable for this embodiment is not particularly limited as long as it can store liquid contents, and various known container forms can be exemplified, such as relatively hard containers such as PET bottles and soft, flexible containers such as pouches. Furthermore, suitable materials for the container include polyester resins such as polyethylene terephthalate (PET) resin, olefin resins such as polyethylene resin, and known rubber materials, but there are no particular limitations and various known materials can be used. The container material may also have a laminated structure of the above-mentioned resin materials.

[0022] The liquid contents stored in the container are not particularly limited, and may be various known liquids such as detergents, seasonings, or soft drinks such as water and tea. Furthermore, instead of the various liquids described above, a known semi-solid gel material such as jelly may be used as the contents stored in the container.

[0023] <Main unit 100> Next, the configuration of the main body 100 constituting the valved synthetic resin dispensing tool 300 will be described in detail with reference to the drawings. As can be seen from Figure 1 and other figures, the main body 100 of this embodiment is composed of a top wall 10, a dispensing tube 20 erected from this top wall 10, and a known skirt wall 30 hanging down from the periphery of this top wall 10.

[0024] The main body 100 can be made of a resin that is relatively hard compared to the valve, such as PET resin. As shown in Figure 6, a known inner ring 11 is provided on the bottom side of the top wall 10, and the opening of the container can be sealed via this inner ring 11.

[0025] As shown in Figs. 4 to 8, the dispensing cylinder 20 includes a cylinder body 21, a flange surface 22, a locking wall portion 23, a locking protrusion portion 24, and the like. The cylindrical body 21 is a hollow cylindrical portion that stands upright so as to extend vertically upward (upward in the Z direction) from the above-described top wall 10. As shown in Figures 1 and 3, the cylindrical body 21 is preferably erected so that the outer circumferential surface 21b gradually decreases in diameter from the lower end, which is the connection portion with the top wall 10, to the upper end (flange surface 22, described later). Note that the cylindrical body 21 in this embodiment is not limited to the shape in which the diameter decreases upward as shown in Figures 1 and 3, and may have a cylindrical outer shape that stands upright from the top wall 10 so that the outer circumferential surface 21b does not decrease in diameter.

[0026] The flange surface 22 is a portion that extends inward from the cylindrical body 21 (toward the center of the opening of the cylindrical body 21). More specifically, the flange surface 22 of this embodiment is provided so as to extend inward from the upper end of the cylindrical body 21 as a base point. As can be seen from FIG. 4 and other figures, the flange surface 22 of this embodiment preferably has a plurality of openings 25 formed intermittently along the circumferential direction. In other words, such openings 25 also constitute part of the flange surface 22 of this embodiment.

[0027] 6 to 8, the locking wall portion 23 is provided so as to hang down (downward in the Z direction) from the inner circumferential side of the flange surface 22. As can be seen from these figures, the locking wall portion 23 is provided at a predetermined distance inward from the cylindrical body 21 via the flange surface 22. As is clear from the figures, when viewed from above in the Z direction, the locking wall portion 23 is positioned closer to the center (i.e., closer to the top plate portion 220) than the tip of the locking protrusion portion 24, which will be described later. As will be described later, the locking wall portion 23 of this embodiment is configured to be able to hold the valve 200 at least via the bottom surface 23a of the locking wall portion 23.

[0028] 7 and 8, the locking protrusion 24 is provided so as to protrude radially inward from the inner surface 21a of the cylindrical body 21. The locking protrusion 24 of this embodiment is configured to be able to hold the valve 200 via at least the upper surface 24a of the locking protrusion 24, as will be described later.

[0029] Preferably, a plurality of locking protrusions 24 are formed intermittently in the circumferential direction on the inner surface 21a of the cylindrical body 21. More specifically, as shown in Fig. 5 and other figures, in this embodiment, four locking protrusions 24 are provided intermittently along the circumferential direction (around the Z axis, in the θz direction) on the inner surface 21a of the cylindrical body 21. In this embodiment, four locking protrusions 24 are provided along the circumferential direction, but the present invention is not limited to this, and for example, a single locking protrusion 24 or any number other than four (for example, three or five) may be provided. However, two or more locking protrusions 24 are preferred in consideration of the balance of holding force.

[0030] 5, in this embodiment, when viewed from the bottom side of the main body 100, the ratio of the protrusion forming area PFA, where the locking protrusions 24 are provided, to the non-forming area NFA, where the locking protrusions 24 are not provided, is approximately 1:1 in the circumferential direction. However, this embodiment is not limited to the above-described form, and for example, in order to further improve the stable retention of the valve, one or more locking protrusions 24 may be provided so that the proportion of the protrusion forming area PFA is greater than the non-forming area NFA.

[0031] One or more openings 25 are formed on the upper surface (flange surface 22) of the above-described pouring tube 20 so as to communicate with the storage space CS. More specifically, as shown in Fig. 4, in this embodiment, four openings 25 are provided intermittently on the flange surface 22 along the circumferential direction (θz direction, around the Z axis). Note that, in this embodiment, a total of four openings 25 are formed on the flange surface 22, but the present invention is not limited to this form, and any number of openings 25, for example, three or less or five or more, may be provided as long as it does not deviate from the spirit of the present invention.

[0032] 7 and 8, the above-mentioned locking protrusion 24 is disposed at an axial position (a position where the openings overlap when viewed from above in the Z direction) that coincides with at least one of the above-mentioned plurality of openings 25. This makes it possible to perform demolding without applying excessive force to the product when molding the main body 100 of this embodiment by, for example, injection molding.

[0033] In this embodiment, it is preferable that the number of openings 25 and the number of locking protrusions 24 are equal to each other in the circumferential direction. Also, in this embodiment, it is preferable that the positions of the openings 25 and the positions of the locking protrusions 24 are equal to each other in the circumferential direction. Also, in this embodiment, it is preferable that the size of the openings 25 is approximately equal to the size of the locking protrusions 24 in the circumferential direction. However, this embodiment is not limited to the above-mentioned form, and for example, the number of locking protrusions 24 may be smaller than the number of openings 25, or the size of the locking protrusions 24 may be smaller than the size of the openings 25.

[0034] As described above, in this embodiment, an accommodation space CS capable of accommodating the valve 200 is formed among the inner surface 21a of the cylindrical body 21, the bottom surface of the flange surface 22, the bottom surface 23a and inner circumferential surface 23b of the locking wall portion 23, and the upper surface 24a of the locking protrusion portion 24. The valve 200 of this embodiment is press-fitted into the accommodation space CS formed between the locking wall portion 23 of the cylindrical body 21, the flange surface 22, and the locking protrusion portion 24, for example, via a press-fitting jig described later, and is contained in the dispensing tube 20.

[0035] 8, it is preferable that the upper surface 24a of the locking protrusion 24 is disposed lower in the axial direction (Z direction) of the cylindrical body 21 than the lower end (bottom surface 23a) of the locking wall 23. This allows the lower end (bottom surface 23a) of the locking wall 23 to press against the base 210 (upper surface 210a) of the valve 200 to form a sealing point, which will be described later.

[0036] <Valve 200> Next, the structure of the valve 200 constituting the valved synthetic resin dispensing tool 300 will be described in detail with reference to the drawings. 2 and other figures, the valve 200 of this embodiment is configured to include a base portion 210, a top plate portion 220, and a thin flexible portion 230. Examples of materials for the valve 200 include natural or synthetic rubber materials and soft olefin resins such as polyethylene.

[0037] As can be seen from Fig. 3 and other figures, the base 210 is an annular portion having an outer shape large enough to be accommodated in the accommodation space CS of the main body 100. In this embodiment, when the valve 200 is press-fitted into the accommodation space CS of the main body 100, a seal point (a point where they come into close contact with each other to form a seal) is formed between the lower end (bottom surface 23a) of the locking wall 23 of the main body 100 and the upper surface 210a of the base 210, as shown in Fig. 8. For this reason, it is preferable that the base 210 has a volume large enough to press against the lower end (bottom surface 23a) of the locking wall 23 when the valve 200 is press-fitted into the accommodation space CS.

[0038] The top plate portion 220 is a disk-shaped portion located inside (inside the ring) of the above-mentioned annular base portion 210. As shown in Fig. 2, a discharge port Dp capable of discharging the contents stored in the container is provided in the center of the top plate portion 220. As such a discharge port Dp, a known discharge port structure capable of discharging liquid contents, such as a cross-shaped slit or a fine hole, may be used.

[0039] 2 and the like, the thin flexible portion 230 is a portion that connects the inner periphery 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 form a ring along the inner periphery of the base portion 210, and its cross-sectional shape extends inward from the upper surface 210a of the base and then hangs down to connect to the upper surface of the outer periphery of the top plate portion 220. The top plate portion 220 is supported by this thin flexible portion 230, and is allowed to move vertically, enabling the liquid content to be discharged through the discharge port Dp.

[0040] <Supporting Mode of Valve 200 in Storage Space CS> Next, with reference to FIGS. 6 to 8, the manner in which the valve 200 is supported within the accommodation space CS will be described. As mentioned above, for example, in the case of a container for storing seasonings, detergents, etc., or in the case of a spout as a dispensing tool, it may be necessary to squeeze the container to dispense the contents, and in such cases it is necessary to prevent the valve 200 from shifting out of the storage space CS in the main body 100 due to the pressure generated when squeezing.

[0041] Therefore, in this embodiment, a configuration is adopted in which the valve 200 is contained in the storage space CS formed within the dispensing tube 20 between at least the flange surface 22 of the tube body 21, the locking wall portion 23 and the locking protrusion portion 24. In this embodiment, "the valve 200 is contained in the storage space CS" refers to a support form in which the valve 200 is held in the storage space CS by being sandwiched at least from above and below (the ends in the ±Z direction in Figure 6, which are the top and bottom sides of the base 210 in the figure).

[0042] 6 and 7, in the valve 200 of this embodiment, the upper portion 210g on the inside of the base 210 (the side closer to the thin-walled flexible portion 230) is preferably in close proximity to the inner circumferential surface 23b of the locking wall portion 23. In this embodiment, the upper portion 210g and the inner circumferential surface 23b are in close proximity as described above, but they may also be in close contact. That is, the positional relationship between the upper portion 210g and the inner circumferential surface 23b in this embodiment includes not only a state in which they are in close proximity with a gap of about several millimeters, but also a state in which they are in close contact, including a state in which the above-mentioned seal point is formed.

[0043] As can be seen from the figure, in the valve 200 of this embodiment, it is preferable that at least the bottom surface 210e1 of the base 210 is in contact with the upper surface 24a of the locking protrusion 24 of the cylindrical body 21. This makes it possible to prevent the valve 200 from unintentionally falling off vertically downward (in the -Z direction). Note that, although this embodiment shows a configuration in which the locking protrusion 24 supports at least a portion (bottom surface 210e1) of the bottom surface of the base 210, a configuration in which the locking protrusion 24 supports and supports the entire bottom surface of the base 210 (bottom surfaces 210e1 and 210e2 in this example) may also be used.

[0044] As can be seen from the figure, in the valve 200 of this embodiment, it is preferable that the outer surface 210d (at least the lower outer surface 210d1) of the base 210 contacts the inner surface 21a of the cylindrical body 21. This allows the outer surface 210d1 of the base 210 and the inner surface 21a of the cylindrical body 21 to form the above-mentioned seal point. Furthermore, this cooperates with the locking wall portion 23 to prevent the valve 200 from unintentionally shifting in the horizontal direction (XY plane direction).

[0045] In this embodiment, the inner surface 21a of the cylindrical body 21 laterally supports at least a portion of the outer surface of the base 210 (the lower outer surface 210d1), but it may also be configured such that the inner surface 21a of the cylindrical body 21 laterally supports all of the outer surfaces of the base 210 (in this example, the lower outer surface 210d1 and the upper outer surface 210d2).

[0046] As can be seen from the figure, in the valve 200 of this embodiment, the top 210b of the base 210 is preferably in close proximity to the bottom surface of the flange surface 22 of the cylindrical body 21. In this embodiment, the top 210b and the bottom surface of the flange surface 22 are in close proximity as described above, but they may also be in close contact. That is, the positional relationship between the top 210b and the bottom surface of the flange surface 22 in this embodiment includes not only a state in which they are in close proximity with a gap of about several millimeters, but also a state in which they are in close contact, including a state in which the above-mentioned seal point is formed.

[0047] <How to attach the valve 200 to the main body 100> Next, with reference to Figure 9, an example of a manufacturing method for the valved synthetic resin dispensing device 300 in this embodiment, that is, a method for assembling the valve 200 into the main body 100 using a press-fitting jig, will be described. That is, as can be seen from the figure, when press-fitting the valve 200 into the accommodation space CS of the main body 100, it is preferable to use a press-fitting jig 400 having a pressing surface as shown in Figure 9.

[0048] More specifically, press-fitting jig 400 of this embodiment may be a hollow cylindrical member that conforms to and comes into contact with the bottom surface of base 210 of valve 200 and has a hollowed-out central region that corresponds to top plate 220. This makes it possible to press-fit valve 200 so as to support the bottom surface of valve 200 (the bottom surface of base 210) and push it up toward storage space CS of main body 100.

[0049] 9(b), the outer peripheral surface of press-fitting jig 400 is preferably splined, with convex portions protruding radially outward and concave portions recessed radially inward alternately arranged along the circumferential direction, so as not to interfere with locking protrusions 24 of main body 100 during the above-described press-fitting. This prevents the outer peripheral surface of press-fitting jig 400 from damaging locking protrusions 24 when valve 200 is pushed up.

[0050] 8 and 9(a), the lower surface of the locking protrusion 24 in this embodiment forms a part of the first inclined surface IS1 that gradually narrows radially inward and upward on the inner surface 21a of the cylindrical body 21. In addition, it is preferable that the outer upper portion 210c of the base 210 in this embodiment forms a second inclined surface IS2 that corresponds to and can come into contact with the first inclined surface IS1 when the valve 200 is inserted into the accommodation space CS.

[0051] In this embodiment, the form in which the second inclined surface IS2 contacts the first inclined surface IS1 refers to a form in which the first inclined surface IS1 and the second inclined surface IS2 are configured to have the same inclination with respect to the vertical direction (press-fitting direction). This makes it possible to prevent excessive interference between the valve 200 and the inner surface 21a of the cylindrical body 21 when the valve 200 is press-fitted so as to be pushed up toward the accommodation space CS.

[0052] <Synthetic resin dispensing tool with valve 310> Next, a valved synthetic resin dispensing device 310 according to this embodiment will be described with reference to Figures 10 and 11. The valved synthetic resin dispensing device 310 according to this embodiment is characterized in that, compared to the valved synthetic resin dispensing device 300 described above, it further comprises an outer ring wall 40 that is disposed radially outward from the skirt wall 30 with a predetermined gap therebetween and that hangs down from the top wall 10, and 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 used for the components already described, and the description thereof will be omitted as appropriate.

[0053] As shown in these figures, the outer ring wall 40 hangs down from the periphery of the top wall 10, and the skirt wall 30 is disposed inside this outer ring wall 40 so as to form a double wall. In addition, an annular protrusion 12 having a hook portion 12f is provided on the periphery of the upper surface of the top wall 10. This allows the protrusion 12 to engage with an undercut 52a provided on the inside of the periphery wall 52 of the hinge cap 50, thereby closing the pouring cylinder 20.

[0054] That is, the hinge cap 50 is configured to include an annular wall 54 and a sealing tube 55 that 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 comes into close contact with the outer peripheral surface 21b of the cylindrical body 21, and the tip of the sealing tube 55 can close the discharge port Dp provided in the top plate portion 220.

[0055] As shown in these figures, the hinge cap 50 may be provided with a known bridge portion 56 and notches 58a, 58b that can maintain the open state of the hinge cap 50. Also, as shown in the figures, a protrusion 57 that protrudes radially outward may be provided on the side of the hinge cap 50 opposite the hinge connection portion 53 so that the user can easily hook their fingers or the like.

[0056] According to the present embodiment described above, the dispensing tool is made up of two pieces, the main body 100 and the valve 200, which makes it possible to reduce material costs compared to a conventional three-piece structure. In addition, according to the present embodiment, the valve 200 is enclosed so as to be sandwiched between the locking wall portion 23 and the locking protrusion portion 24 of the cylindrical body 21 and also encased, including the inner surface 21a, so that the valve 200 can be held in the storage space CS much more stably than in the conventional structure.

[0057] The above-described embodiment is merely an example, and various modifications are possible without departing from the spirit of the present application. For example, the threaded portion 31 formed on the inner side of the skirt wall 30 of the main body 100 may be omitted, and a known undercut may be provided so that the main body 100 can be plugged into the opening of a container.

[0058] Furthermore, the above-mentioned valved synthetic resin pouring tool 300 is not limited to a cap that can be attached to the above-mentioned container by screwing or capping, but may also be in the form of a spout (drinking mouth) that can be attached to a known pouch, for example. [Industrial Applicability]

[0059] The present invention is suitable for realizing a valved synthetic resin dispensing tool that is low cost and has high stability in holding the valve. [Explanation of symbols]

[0060] 100 units 10 Top wall 20 Pour tube 30 Skirt Wall 40 Outer ring wall 50 Top lid 200 valves 210 base 220 Top plate part 230 Thin flexible part 300 Synthetic resin dispenser with valve

Claims

1. A valved synthetic resin dispensing tool having a main body and a valve with a discharge port, which is attached to the mouth of a container, The body includes: The ceiling wall and a pouring tube that is erected from the top wall and has a cylindrical body, a flange surface that extends inward from the cylindrical body, a locking wall portion that hangs down from the inner periphery of the flange surface and is capable of holding the valve, and a locking protrusion portion that protrudes radially inward from the inner surface of the cylindrical body and is capable of holding the valve, The valve is press-fitted into an accommodation space formed between the locking wall portion of the cylindrical body, the flange surface, and the locking protrusion portion, and is contained within the pouring cylinder, and 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-walled flexible portion that connects the inner circumferential side of the base portion and the top plate portion, The bottom surface of the locking wall portion and the top surface of the base are in close contact with each other to form a seal point. A synthetic resin dispensing tool with a valve.

2. an upper surface of the locking protrusion portion is disposed lower than a lower end of the locking wall portion in the axial direction of the cylindrical body; The valved synthetic resin dispensing tool according to claim 1.

3. A plurality of openings are formed intermittently along the circumferential direction on the upper surface of the pouring cylinder so as to communicate with the storage space, The locking protrusion is disposed at an axial position that matches with at least one of the plurality of openings.

3. The valved synthetic resin pouring tool according to claim 1 or 2.

4. 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-walled flexible portion that connects an inner circumferential side of the base portion and the top plate portion, The upper surface of the base is in contact with the bottom of the locking wall. The valved synthetic resin pouring tool according to any one of claims 1 to 3.

5. 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-walled flexible portion that connects an inner circumferential side of the base portion and the top plate portion, An upper portion of the inner surface of the base portion is adjacent to the inner circumferential surface of the locking wall portion. The valved synthetic resin pouring tool according to any one of claims 1 to 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-walled flexible portion that connects an inner circumferential side of the base portion and the top plate portion, The bottom surface of the base is in contact with the top surface of the locking protrusion. The valved synthetic resin pouring tool 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-walled flexible portion that connects an inner circumferential side of the base portion and the top plate portion, The outer surface of the base is in contact with the inner surface of the cylindrical body. The valved synthetic resin pouring tool according to any one of claims 1 to 6.

8. a lower surface of the locking protrusion constitutes a part of a first inclined surface that gradually narrows radially inwardly and upwardly on the inner surface of the cylindrical body, an upper portion of the outer surface of the base portion is a second inclined surface that corresponds to and can come into contact with the first inclined surface when the valve is inserted into the accommodating space; The valved synthetic resin pouring tool according to any one of claims 1 to 7.

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