Hinge Cap

Abstract

To provide a hinged cap allowed to stably pour a content liquid from a container body even if the content liquid contains carbonic acid gas and inhibit a lid from being lifted up by gas pressure during cap closure.SOLUTION: A hinged cap comprises a cap body B that is fitted to a spout 1 of a container body A and a lid D that is attached to the cap body B through a hinge part C. The cap body B comprises a sidewall 9 closing a spout 1 opening of the container body A, a spout opening 10 made open in the sidewall 9, and a flow-rate regulating member E provided downward from a spout opening 10. The flow-rate regulating member E comprises a sidewall portion 15 extending downward from the spout opening 10, a bottom portion 16 closing a lower end of the sidewall portion 15, and a protrusion 17 provided upward from the bottom portion 16 and protruding at an upper end above the sidewall 9. The lid D comprises a top wall 25 and a first inner cylinder 29 extending downward from the top wall 25 so as to seal the protrusion 17 of the flow-rate regulating member E during lid closure.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a hinge cap that is attached to the mouth of a container body, and more particularly to a hinge cap that is suitable for a container body filled with a liquid that contains carbon dioxide gas. [Background technology]

[0002] Conventionally, in a hinge cap having a cap body that is attached to the mouth of a container body and a lid body that is attached to the cap body so as to be able to be opened and closed via a hinge portion, a partition having a removable portion formed by a pull ring or the like has been provided at the intended opening portion of the cap body in order to ensure airtightness within the container body. However, in order to open the removal section, the removal work requires opening the lid and then pulling a pull ring or the like to remove the removal section, which is cumbersome and can be difficult for users with weak strength to remove the bottle.

[0003] In order to solve the above problems, a non-removable hinge cap that does not use a pull ring is known, in which the cap body comprises a partition wall that seals the opening of the spout of the container body, a pouring outlet opening into the partition wall, a pouring tube that stands up from the pouring outlet, and a bottomed straightening cylinder that is provided below the pouring outlet, the straightening cylinder having a side wall that hangs down from the pouring outlet, a bottom that blocks the lower end of the side wall, and a protrusion that stands up from the bottom, and the lid body comprises a top wall, a side peripheral wall that hangs down from the peripheral edge of the top wall, and a sealing tube that hangs down from the back surface of the top wall (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2020-083445 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, although the hinge cap described in Patent Document 1 can reduce the diameter of the spout (discharge opening), when attached to the mouth of a container body filled with a liquid content containing carbon dioxide gas, depending on the diameter of the spout, there is a problem in that when the container body is inverted to discharge the liquid content, the entire spout can be buried under the liquid surface, making it impossible to discharge the liquid. Furthermore, in a hinge cap attached to the nozzle of a container body filled with a liquid containing carbon dioxide gas, there was a problem in that the lid was lifted up by the gas pressure of the liquid.

[0006] The present invention has an objective of solving the above problems and providing a hinge cap that can stably eject the contents from the container body, even if the contents contain carbon dioxide gas, and that can prevent the lid body from lifting due to gas pressure when the lid is closed. [Means for solving the problem]

[0007] In order to solve the above problems, the present invention provides a hinge cap comprising a cap body that is attached to a nozzle of a container body, and a lid body that is attached to the cap body via a hinge portion, the cap body comprising a partition wall that closes an opening of the nozzle of the container body, a discharge opening that opens into the partition wall, and a flow rate adjusting member that is provided below the discharge opening. a cylindrical body extending from the discharge opening; The flow rate adjusting member has a side wall portion suspended downward from the discharge opening, a bottom portion closing the lower end of the side wall portion, and a protruding portion suspended upward from the bottom portion and having an upper end protruding above the partition wall. The lid body has a top wall and a first inner tube suspended from the top wall and sealing the protruding portion of the flow rate adjusting member when the lid is closed. a second inner cylinder that is hung from the top wall and seals the cylindrical body when the lid is closed; The present invention employs a configuration characterized by comprising:

[0008] As an embodiment of the hinge cap, The second inner cylinder is The present invention employs a configuration characterized in that, when the lid is closed, the inner and outer peripheries of the cylindrical body are clamped and sealed, and The cap body includes a pouring tube that stands upright from the outer edge of the partition wall, and the lid body includes a sealing tube that hangs down from the top wall and seals the pouring tube when the lid is closed. The present invention employs a configuration characterized by the above. Effect of the Invention

[0009] By adopting the above-described configuration, the hinge cap of the present invention can stably dispense the contents, even if they contain carbon dioxide gas, even if the container is tilted or turned upside down during use, and can prevent the lid from being pushed up and opening when the lid is closed, even if the internal pressure increases due to the contents. [Brief description of the drawings]

[0010] [Figure 1] 4 is a side cross-sectional view showing a closed state of the hinge cap attached to the container body according to the embodiment of the present invention. FIG. [Diagram 2] 1A and 1B are explanatory views showing an open state of a hinge cap according to an embodiment of the present invention, in which (a) is a top view and (b) is a side cross-sectional view. [Diagram 3] 1 is an explanatory diagram of a hinge cap attached to a container body according to an embodiment of the present invention when the hinge cap is opened. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Next, the hinge cap of the present invention will be described with reference to the drawings showing an embodiment. In the following description, when looking at Figure 1, the up-down direction is referred to as the "axial direction", the up direction is referred to as the "up", the down direction is referred to as the "down", the left direction is referred to as the "front side (opposite the hinge part)", and the right direction is referred to as the "rear side (hinge part side)". EXAMPLES

[0012] In Figure 1, A is a container body, B is a cap body attached to container body A, C is a hinge portion provided on the back side of cap body B, and D is a lid body attached to cap body B via hinge portion C in an openable and closable manner. The container body A is a glass bottle with a mouth portion 1 at the top, and on the outer periphery of the mouth portion 1, there is a fitting portion 2 that fits into the upper part of the cap body B when it is attached, and below that is a threaded portion (male thread) 3 into which the cap body B is screwed.

[0013] As shown in Figures 1 and 2, the cap body B is attached to the container body A and comprises an outer tube 5 whose inner periphery screws into the outer periphery of the nozzle portion 1 and has a hinge portion C connected to a predetermined position on the outer periphery, a ring-shaped upper wall 6 extending inward from the upper end of the inner periphery of the outer tube 5 and abutting the upper surface of the nozzle portion 1, a pouring tube 7 standing upright from the inner edge of the upper wall 6, an inner tube 8 hanging down from the inner edge of the upper wall 6 and whose outer periphery is inserted into the inner periphery of the nozzle portion 1, a partition 9 extending inward from the inner edge of the upper wall 6 and sealing the opening of the nozzle portion 1, a discharge opening 10 of diameter w1 penetrating the center of the partition 9, a cylinder 11 standing upright from the inner edge of the discharge opening 10 of the partition 9, and a flow rate adjustment member E with a bottom provided below the inner edge of the discharge opening 10. In this embodiment, the flow rate adjustment member E is integrated with the cap body B, but the flow rate adjustment member E may be molded separately from the cap body B and then set in the cap body B.

[0014] The outer cylinder 5 has an inner periphery provided with a threaded portion (female thread) 12 which screws into the threaded portion 3 of the container body A. A lid engagement portion 13 is erected on the upper wall 6 from the outer edge of the upper surface to engage with the lid body D to close the lid, and an engagement tube 14 is erected from the lower surface, the inner periphery of which engages with the outer periphery of the engagement portion 2 of the mouth tube portion 1 when the container is attached to the container body A. When the cap body B is attached to the container body A, the upper part of the mouth portion 1 is clamped between the outer periphery of the inner tube 8, the inner periphery of the fitting tube 14, and the lower surface of the upper wall 6, and the cap body B is attached by screwing the inner periphery of the outer tube 5 to the outer periphery of the mouth portion 1. The inner periphery of the outer cylinder 5 and the outer periphery of the mouth tube portion 1 may be fitted together by undercut.

[0015] The flow rate control member E is composed of a cylindrical side wall portion 15 that is suspended downward at a height h1 from the lower end of the discharge opening 10 (the lower surface of partition 9), a ring-shaped bottom portion 16 that extends inward so as to block the lower end of side wall portion 15, and a hollow protrusion portion 17 that is formed with an outer diameter w2 and has a tip that is erected from the center of bottom portion 16 upward at a height h2 from the upper surface of partition 9. The side wall portion 15 has exhaust ports 18 formed at three locations on the front side and both sides, and an air replacement port 19 formed on the rear side, which are cut out to a predetermined width from the upper end of the side wall portion 15 to a part of the bottom portion 16. It is sufficient that at least the discharge port 18 is provided on the front side and the air replacement port 19 is provided on the rear side, and the number and arrangement of the discharge port 18 and the air replacement port 19 can be set appropriately. In this embodiment, the widths of the discharge port 18 and the air replacement port 19 are formed to be equal, but this is not limiting, and the width of the discharge port 18 may be larger than the width of the air replacement port 19 .

[0016] The protruding portion 17 is composed of a cylindrical wall 20 standing upward from the center of the bottom portion 16 and a top wall 21 closing the upper end of the cylindrical wall 20. Furthermore, a cavity is formed on the inner periphery of the protrusion 17, opening from the bottom 16 to the top wall 21; however, the cavity may have any shape as long as it has a moldable structure, and it does not have to reach the height near the top wall 21; furthermore, the cavity itself may be eliminated, making the protrusion 17 a solid protrusion protruding from the center of the bottom 16.

[0017] In this embodiment, the partition 9 inside the dispensing tube 7 of the cap body B blocks the opening of the nozzle portion 1 of the container body A, and the diameter w1 of the discharge opening 10 in the center of the partition 9 is smaller than the inner diameter of the nozzle portion 1. Furthermore, since the protruding portion 17 of the flow rate adjusting member E protrudes from the center of the discharge opening 10, the opening area s of the discharge opening 10 is the area of ​​the aperture w1 minus the area of ​​the outer diameter w2.

[0018] The lid body D has a disk-shaped top wall 25 and a side wall 26 which hangs down from the peripheral edge of the top wall 25 and has a hinge portion C connected to the lower end of its outer periphery. On the back surface of the top wall 25, from the outside to the center, there are hung a sealing tube 27 whose lower outer periphery is inserted into the upper inner periphery of the pouring tube 7 of the cap body B to seal when the lid is closed, an outer inner tube (second inner tube) 28 which engages with the upper part of the cylindrical body 11 to seal, and an inner inner tube (first inner tube) 29 into whose lower inner periphery the upper outer periphery of the protrusion 17 of the flow rate adjustment member E is inserted to seal.

[0019] An engagement recess 30 is provided on the lower inner periphery of the side wall 26, which engages with the upper and outer surfaces of the lid engagement portion 13 of the cap body B to maintain the lid in a closed state, and a handle portion 31 is provided on the front side of the lower outer periphery of the side wall 26.

[0020] The outer inner tube 28 has an engagement step 32 recessed at its lower end and consisting of a top surface 32a and an outward surface 32b from the outer periphery side, and at predetermined positions on the outer periphery, a plurality of engagement ribs 33 are arranged which are formed radially at a height such that their tips are below the top surface 32a. When the lid is closed, the top surface 32a abuts against the upper surface of the cylinder 11 and the outward surface 32b is inserted into the inner circumference of the cylinder 11 to seal, and the inward surface at the tip of the engagement rib 33 engages with the outer periphery of the cylinder 11, preventing the outer inner tube 28 from deforming inward. In addition, the outer inner tube 28 may be a cylindrical member instead of the multiple engaging ribs 33 of this embodiment as long as it clamps and seals the inner and outer peripheries of the cylindrical body 11 of the cap body B when closed.

[0021] Next, the manner of use and the effects of this embodiment will be described. The hinge cap of this embodiment is integrally molded in an open state as shown in FIG. 2, and the lid body D is rotated via the hinge portion C to cover the cap body B and close the lid.

[0022] At that time, the lower outer periphery of the sealing tube 27 of the lid body D is tightly fitted to the upper inner periphery of the pouring tube 7 of the cap body B, thereby being sealed, and the engaging step portion 32 of the outer inner tube 28 is tightly fitted to the upper surface and upper inner periphery of the cylindrical body 11, thereby being sealed. In addition, the engagement recess 30 on the side wall 26 of the lid body D engages with the lid engagement portion 13 of the cap body B, and the upper outer periphery of the protrusion 17 of the flow rate control member E is inserted into and engaged with the lower inner periphery of the inner inner tube 29, thereby maintaining the lid closed state.

[0023] Next, as shown in Figure 1, the closed hinge cap can be made into a container with a hinge cap attached at the time of shipment by screwing the inner circumference of the outer tube 5 of the cap body B onto the outer circumference of the mouth portion 1 of the container body A filled with the content liquid, and clamping the upper part of the mouth portion 1 between the outer circumference of the inner tube 8, the inner circumference of the fitting tube 14, and the underside of the upper wall 6, or the container can be made into a container in which the mouth portion 1 of the container body A filled with the content liquid is sealed with a crown at the time of shipment, and a hinge cap is attached to the mouth portion 1 of the container body A when in use. In the hinge cap of this embodiment, when the container is used, the crown is removed from the mouth portion 1 of the container body A and the hinge cap is attached by screwing together the threaded portion 3 on the outer periphery of the mouth portion 1 of the container body A and the threaded portion 12 on the inner periphery of the outer tube 5 of the cap body B. However, if the container is to be shipped with the hinge cap attached, it is acceptable to provide mating convex and concave portions instead of the respective threaded portions, and attach them by fitting them together.

[0024] In the hinge cap of this embodiment, when in the closed state, the engagement recess 30 on the side wall 26 of the lid body D engages with the lid engagement portion 13 of the cap body B to maintain the closed state, and the upper outer periphery of the protrusion 17 of the flow rate control member E is inserted into and engages with the lower inner periphery of the inner inner tube 29, and further, the lower outer periphery of the sealing tube 27 and the upper inner periphery of the pouring tube 7, and the outer inner tube 28 and the cylindrical body 11 are in close contact with each other, thereby strengthening the force maintaining the closed state.

[0025] In addition, since the liquid contents of container body A contain carbon dioxide gas, the gas pressure inside container body A increases, and the gas hits the underside of partition 9 of cap body B from the opening of nozzle portion 1, enters flow rate control member E through discharge port 18 and air replacement port 19 of flow rate control member E, and pushes up lid body D from below through discharge opening 10. However, due to the engagement between the lower inner circumference of the inner inner tube 29 of the lid body D and the upper outer circumference of the protrusion 17 of the flow rate adjustment member E, the gas pressure pushing up on the lid body D from below is applied only to the outside of the inner inner tube 29, and since the upper inner circumference of the cylinder 11 is engaged with the lower outer circumference of the outer inner tube 28 of the lid body D, the force pushing up on the lid body D from below is limited only to the upper part of the opening area s, and no gas pressure is applied to other parts.As a result, the lid body D and the cap body B are maintained in a closed state, and the lid is prevented from opening due to gas pressure.

[0026] In the hinge cap of this embodiment, when the lid body D is in the closed state and a pressing force is applied from above due to an impact such as being dropped, the lid body D is pushed into the cap body B. However, the top surface 32a of the engagement step 32 of the outer inner tube 28 of the lid body D abuts against the upper surface of the cylinder 11 of the cap body B, and further, the outward surface 32b and the tip of the engagement rib 33 clamp the upper part of the cylinder 11 to prevent it from shifting. Therefore, the top wall 25 of the lid body D is prevented from being crushed, the closed state is maintained stably, and a seal is also maintained.

[0027] Since a flow rate adjusting member E is provided at the discharge opening 10 of the cap body B, even if the container is dropped when the hinge cap is closed and the liquid contents inside the container body A shake violently, the liquid contents will hit the bottom 16 of the flow rate adjusting member E and their momentum will be suppressed. In addition, the liquid contents that enters from the discharge opening 18 will also hit the outer periphery of the protrusion 17 and their momentum will be suppressed, so that the liquid contents will not forcefully push up the top wall 25 of the lid body D and cause the lid to open.

[0028] In order to use the liquid content in the container body A, the user places his or her fingers on the handle 31 and opens the lid body D relative to the cap body B, pivoting about the hinge C. At that time, as shown in FIG. 3, the lid body D is lifted from the front side with the hinge portion C as a fulcrum, and the engagement recess 30 of the lid body D on the front side disengages from the lid engagement portion 13 of the cap body B, and the engagement between the lower outer periphery of the sealing tube 27 and the upper inner periphery of the pouring tube 7, and then the engagement between the lower part of the outer inner tube 28 and the upper part of the cylindrical body 11, are released from the front side, creating a gap and allowing the lid to open.

[0029] In the hinge cap of this embodiment, since the content liquid contains carbon dioxide gas, gas pressure acts only between the discharge opening 10 and the outer inner tube 28 and the inner inner tube 29 of the lid body D. When the lid is opened, first, a gap is created from the front side where the lower part of the outer inner tube 28 engages with the upper part of the cylinder 11, and gas pressure is released from this gap into the inside of the pouring tube 7, weakening the pressure inside the pouring tube 7. Next, gas is released into the side wall 26 of the lid body D from the gap created on the front side where the lower outer circumference of the sealing tube 27 engages with the upper inner circumference of the pouring tube 7, further weakening the gas pressure inside the side wall 26. This allows gas to be released, so that even if the lid body D is suddenly opened, the contents can be prevented from being released along with the carbon dioxide gas and contaminating the surrounding area.

[0030] When the open container body A is tilted toward the front, the liquid contents inside the container body A come into contact with the front side of the flow rate control member E, and when the container is tilted further, the liquid contents flow into the flow rate control member E through the discharge port 18 of the flow rate control member E, flow from the discharge opening 10 into the cylinder 11, run along the inner surface of the dispensing tube 7, and are discharged from the front tip of the dispensing tube 7.

[0031] In the hinge cap of this embodiment, a protrusion 17 is erected from the bottom 16 of the flow rate adjustment member E, so that even if the container is tilted significantly and a large amount of liquid content flows inward from the discharge port 18 with great force, the force is suppressed as the protrusion 17 hits the outer periphery of the tube wall 20, and the liquid content can be discharged from the dispensing tube 7 in a rectified state.

[0032] In this embodiment, in order to confirm the effects of setting the diameter w1 of the discharge opening 10, the outer diameter w2 of the protrusion 17, the height h1 of the flow rate control member E, and the height h2 of the protrusion 17, an experiment was conducted to compare the discharge of beverages containing carbon dioxide gas (carbonated beverages) for hinge caps in which the diameter w1, outer diameter w2, height h1, and height h2 were changed. The carbonated beverage used in the experiment was carbonated water, the container body A was a glass bottle with a capacity of 350 ml, and the hinge cap was for glass bottles with an inner diameter of the mouth portion 1 of 15 mm, and was made of LLDPE (linear low density polyethylene) resin.

[0033] First, the diameter w1 of the discharge opening 10 is set to 7 mm, the outer diameter w2 of the protrusion 17 to 3 mm, and the height h1 of the flow rate adjustment member E to 6 mm. If the upper end of the protrusion 17 is at the same height as the upper surface of the partition 9 (height h2 = 0 mm), when the container body A is tilted, the carbonated water will fill the discharge opening 10 and the water will not be able to be discharged. However, if the tip of the protrusion 17 is 3 mm higher than the upper surface of the partition 9 (height h2 is 3 mm), when the container body A is tilted, the effect of the protrusion 17 will disrupt the balance of the carbonated water that has filled the discharge opening 10, allowing it to be discharged. However, when the container body A is turned upside down, discharge becomes difficult, so when the height h1 of the flow rate adjustment member E is set to 7 mm, discharge becomes possible.

[0034] Next, when the diameter w1 of the discharge opening 10 is set to 8.2 mm, the outer diameter w2 of the protrusion 17 is set to 3 mm, and the height h2 of the protrusion 17 from the top surface of the partition 9 is set to 3 mm, if the height h1 of the flow rate adjustment member E is 6 mm, when the container body A is tilted, carbonated water can be discharged due to the effect of the protrusion 17, but when the container body A is turned upside down, discharge becomes difficult. However, if the height h1 of the flow rate adjustment member E is 7 mm, when the container body A is tilted, the effect of the protrusion 17 allows carbonated water to be ejected, and ejection can continue even if the container body A is inverted.Furthermore, even if the height h1 of the flow rate adjustment member E is 15 mm, when the container body A is tilted, the effect of the protrusion 17 allows carbonated water to be ejected, and ejection can continue even if the container body A is inverted.

[0035] Next, when the diameter w1 of the discharge opening 10 is set to 12 mm, the height h1 of the flow rate adjustment member E is set to 11 mm, and the height h2 of the protrusion 17 from the top surface of the partition 9 is set to 3 mm, if the outer diameter w2 of the protrusion 17 is 3 mm, when the container body A is tilted, carbonated water can be discharged due to the effect of the protrusion 17, and the discharge can continue even if the container body A is inverted.Furthermore, even if the outer diameter w2 of the protrusion 17 is 5 mm, when the container body A is tilted, carbonated water can be discharged due to the effect of the protrusion 17, and the discharge can continue even if the container body A is inverted.

[0036] From the above experimental results, in order to eject carbonated water not only when the container body A to which the hinge cap is attached is tilted, but also when it is upside down, it is preferable that the hinge cap have a diameter w1 of the ejection opening 10 of 7 to 12 mm, an outer diameter w2 of the protrusion 17 of 3 to 5 mm, a height h1 of the flow rate adjustment member E of 7 to 15 mm, and a height h2 of the tip of the protrusion 17 from the top surface of the partition wall 9 of 3 to 7 mm (3 mm or more is sufficient, but the upper limit is set to 7 mm taking into account the height of the lid body D). Furthermore, in this embodiment, since the content liquid contains carbon dioxide gas, it is desirable to make the opening area s and the diameter w1 of the discharge opening 10 as small as possible so that the lid D does not open due to gas pressure, and therefore it is more preferable that the flow rate control member E in this embodiment be set so that the diameter w1 of the discharge opening 10 is 8.2 mm, the outer diameter w2 of the protrusion 17 is 3 mm, the height h1 of the flow rate control member E is 11 mm, and the height h2 of the protrusion 17 from the top surface of the partition wall 9 is 3 mm.

[0037] Next, when the content liquid has been used up, the container is tilted back, and the content liquid remaining in the dispensing tube 7, except for the outer peripheral side of the cylinder 11, flows down into the flow rate adjustment member E, and can be recovered into the container body A through the discharge port 18 and the air replacement port 19. Thereafter, when the lid body D is closed again, the lower outer periphery of the sealing tube 27 of the lid body D and the upper inner periphery of the pouring tube 7 of the cap body B are tightly sealed, the engagement step 32 of the outer inner tube 28 is tightly fitted to the upper surface and upper inner periphery of the cylinder 11, and the lower inner periphery of the inner inner tube 29 is tightly fitted to the upper outer periphery of the protrusion 17 of the flow rate adjustment member E, thereby once again sealing the inside of the container body A, and the hinge cap can be used repeatedly to open and close the lid body D. [Industrial Applicability]

[0038] The hinge cap of the present invention can stably dispense even contents containing carbon dioxide gas even when the container is tilted or turned upside down during use, and can prevent the lid from opening even if the internal pressure increases due to the contents.It is particularly suitable as a non-removal type hinge cap for contents containing carbon dioxide gas and which have a small diameter discharge opening, eliminating the need to remove the cork by pulling. [Explanation of symbols]

[0039] A Container body B Cap body C Hinge part D Lid body E Flow rate adjustment member h1, h2 height w1 caliber w2 Outer diameter s Opening area 1 Mouth barrel 2 Fitting part 3, 12 Threaded part 5 Outer cylinder 6 Upper Wall 7 Pour tube 8 Inner cylinder 9 Bulkhead 10 Discharge opening 11 Cylinder 13 Lid engagement part 14 Fitting tube 15 Side wall 16 Bottom 17 Protrusion 18 Outlet 19 Air replacement vent 20 Cylinder wall 21 Ceiling Wall 25 Top Wall 26 Side Wall 27 Secret Envelope 28 Outer inner tube (second inner tube) 29 Inner tube (first tube) 30 Engagement recess 31 Handle 32 Engagement stepped portion 32a Top 32b outward facing surface 33 Engagement rib

Claims

1. A hinge cap including a cap body that is attached to a nozzle of a container body and a lid body that is attached to the cap body via a hinge portion, the cap body includes a partition wall that closes the opening of the nozzle of the container body, a discharge opening that opens in the partition wall, a flow rate adjusting member that is provided below the discharge opening, and a cylindrical body that stands upright from the discharge opening; the flow rate adjusting member includes a side wall portion extending downward from the discharge opening, a bottom portion closing a lower end of the side wall portion, and a protruding portion extending upward from the bottom portion and having an upper end protruding above the partition wall; The hinge cap is characterized in that the lid body comprises a top wall, a first inner tube hanging down from the top wall and sealing the protruding portion of the flow rate control member when the lid is closed, and a second inner tube hanging down from the top wall and sealing the cylindrical body when the lid is closed.

2. A hinge cap as described in claim 1, characterized in that the second inner tube clamps and seals the inner and outer circumferences of the cylindrical body when the lid is closed.

3. The cap body includes a pouring tube extending from the outer edge of the partition wall, 3. The hinge cap according to claim 1, wherein the lid body is provided with a sealing tube that is hung from the top wall and seals the pouring tube when the lid is closed.

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