Hinge cap

Abstract

To provide a hinge cap whose seal lid for closing a spout can be easily peeled off.SOLUTION: A hinge cap includes: a cap body 2 having a spout part 20 erected from a top wall 10 laid on the upper end of a mounting cylinder 4 mounted on a mouth neck part 102 of a container body 100; an upper lid 30 having one end of a lid peripheral wall 40 hanging from the peripheral end side of a top plate 32 opposed to the top wall 10 connected to the upper end side of the mounting cylinder 4 through a hinge 8; and a seal lid 50 for sealing a spout A opened at the upper end of the spout part 20. In the top plate 32, a communication port 38 is opened which is positioned on the upper side of the standing place e of the spout part 20 in the top wall 10. An outside part 52 of the seal lid 50 is adhered in an unpeelable manner to an adhesion area P set on the surface of the top plate 32, and an inside part 54 of the seal lid is brought into close contact with an upper end surface 22 of the spout part 20 and can be peeled from the upper end surface 22 by a lid opening operation of the upper lid 30.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a hinge cap, and more particularly to a hinge cap that is attached to the mouth and neck of a container body and used to pour out the contents. [Background technology]

[0002] A known hinge cap of this type consists of a cap body with a top plate covering the upper surface of the mouth and neck portion and an opening for a spout, a top lid connected to one end of the cap body via a hinge, and a sealing film (sealing lid) that seals the spout (Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 4580049 Summary of the Invention [Problem to be solved by the invention]

[0004] The hinge cap of Patent Document 1 requires the user to peel the seal lid off the spout before use, which is troublesome. In addition, the peeled off seal lids could end up scattered as trash and accidentally get mixed in with unintended places.

[0005] A first object of the present invention is to provide a hinge cap that allows a seal lid that closes a pouring outlet to be easily peeled off. A second object of the present invention is to prevent the peeled seal lid from becoming waste. [Means for solving the problem]

[0006] The first means is a cap body 2 having a top wall 10 attached to the upper end of an attachment tube 4 attached to a mouth / neck portion 102 of a container body 100, and a pouring portion 20 erected from the top wall 10; an upper cover (30) in which one end of a lid peripheral wall (40) hanging down from the peripheral end side of a top plate (32) facing the top wall (10) is connected to the upper end side of the mounting tube (4) via a hinge (8); A seal lid 50 that seals a pouring outlet A that opens at the upper end of the pouring part 20; In a hinge cap comprising: The top plate 32 has a communication port 38 opened therein, the communication port 38 being located above the upright portion e of the pouring portion 20 in the top wall 10, When viewed from above, the outer portion 52 of the sealing lid 50 is non-removably adhered to an attachment area P set on the surface of the top plate 32, and the inner portion 54 of the sealing lid is in close contact with the upper end surface 22 of the pouring portion 20 and is formed so as to be removable from the upper end surface 22 by the opening operation of the top lid 30. And, The pouring portion 20 is formed by erecting a lower cylindrical portion 20a with a large diameter and an upper cylindrical portion 20c with a small diameter, An inner cylinder 48 that fits onto the outer surface of the pouring portion 20 extends downward from the rim of the communication port 38, and a sealing means S is formed between the inner cylinder 48 and the lower cylindrical portion 20a.

[0007] In this means, as shown in FIG. 1(A), an upper lid 30 is connected via a hinge 8 to a cap body 2 having a pouring portion 20 erected from a top wall 10, and a pouring outlet A opening at the upper end of the pouring portion 20 is sealed with a sealing lid 50. A communication port 38 is opened in the top plate 32, positioned at least above the portion where the pouring portion 20 is erected from the top wall 10 (pouring portion erecting portion e). An outer portion 52 of the sealing lid 50 as viewed from above is non-removably adhered to an appropriate position (attachment area P) on the surface of the top plate 32. An inner portion 54 of the sealing lid as viewed from above is in close contact with the upper end surface 22 of the spout portion 20, and is formed so as to be removable from the upper end surface 22 when the top lid 30 is opened. According to this structure, the sealing lid 50 is removed from the pouring portion 20 by opening the top lid 30, which is convenient to use. Furthermore, the sealing lid 50 remains attached to the upper lid 30 even after the lid opening operation, so it does not become waste. 1, the spout 20 has a large-diameter lower cylindrical portion 20a and a small-diameter upper cylindrical portion 20c standing upright. An inner cylinder 48 that fits onto the outer surface of the lower cylindrical portion 20a is suspended from the rim of the communication port 38, forming a gap V between the inner cylinder 48 and the upper cylindrical portion 20c.

[0008] The second means has the first means, and the attachment area P is a circumferential area set on the upper surface of the top plate 32 surrounding the communication opening 38, The sealing lid 50 is formed as a single sheet material, The upper end surface 22 of the pouring portion 20 is disposed at approximately the same height as the communication port 38 when viewed from the side.

[0009] In this embodiment, as shown in FIG. 1(A), the upper end surface 22 of the spout portion 20 is located near the height of the communication port 38 when viewed from the side. According to this structure, the sealing lid 50 can be attached to both the upper end surface 22 of the pouring portion 20 and the attachment area P of the top plate 32 in approximately one operation, making the attachment work easy.

[0010] The third means includes the first means or the second means, and the top plate 32 is formed with a recessed portion 34 having a peripheral bottom surface 35 surrounding the communication opening 38, The sealing lid 50 is housed in the recessed portion 34, The peripheral bottom surface 35 is adhered to the outer portion 52 of the seal lid 50 as the attachment area P.

[0011] In this means, as shown in FIG. 1(B), the sealing lid 50 is housed in the recessed portion 34. This structure can protect the sealing lid 50 from contact with other objects. The peripheral bottom surface 35 of the recess 34 is bonded to the outer portion 52 of the sealing lid 50 . This allows the seal lid 50 to be adhered to the top lid 30 more reliably.

[0012] The fourth means comprises any one of the first means to the third means, and The inner cylinder 48 and the Lower cylinder part 20a A sealing means S is formed between them.

[0013] In this means, as shown in FIG. 1, an inner cylinder 48 and Lower cylinder part 20a A sealing means S was formed between them. This structure improves sealing performance.

[0014] The fifth means includes any one of the first means to the fourth means, and the outer portion 52 of the sealing lid 50 is attached to the attachment area P of the top plate 32, and the inner portion 54 of the sealing lid is attached to the attachment area P of the top plate 32. The aforementioned are welded to the upper end surface 22 of the spout portion 20, In addition, the area of ​​the welded portion of the attachment region P of the top plate 32 is made larger than the area of ​​the welded portion of the upper end surface 22 of the spout portion 20.

[0015] In this means, the outer portion 52 of the sealing lid 50 is welded to the attachment area P of the top plate 32, and the inner portion 54 of the sealing lid is welded to the upper end surface 22 of the pouring portion 20, and the welded area of ​​the attachment area P of the top plate 32 is made larger than the welded area of ​​the upper end surface 22 of the pouring portion 20. According to this structure, it is possible to easily and accurately design a configuration in which the adhesive strength of the outer portion 52 to the attachment area P is greater than the adhesive strength of the inner portion 54 to the upper end surface 22 of the pouring portion 20, and it is possible to reliably peel the sealing lid from the pouring portion 20 when opening the lid. [Effects of the Invention]

[0016] According to the present invention, the sealing lid that closes the pouring outlet can be easily peeled off. Furthermore, according to the present invention, the peeled seal lid does not become litter. [Brief explanation of the drawings]

[0017] [Figure 1] 1A and 1B are cross-sectional views of a hinge cap according to an embodiment of the present invention, where FIG. 1A is an overall view of the hinge cap, and FIG. 1B is an enlarged view of a main part of the hinge cap. [Figure 2] 2 is an explanatory diagram of the opening operation of the hinge cap shown in FIG. 1. [Figure 3]2A and 2B are diagrams showing the manufacturing stages of the hinge cap shown in FIG. 1, where FIG. 2A shows the molding stage of the cap, FIG. 2B shows the stage before the sealing lid is attached to the molded hinge cap, and FIG. 2C shows the stage after the sealing lid has been attached. BEST MODE FOR CARRYING OUT THE INVENTION

[0018] 1 to 3 show a hinge cap according to an embodiment of the present invention. This hinge cap is composed of a cap body 2, an upper cover 30, and a seal cover 50.

[0019] The cap body 2 is formed by attaching a top wall 10 to the upper end of an attachment tube 4 that is attached to the mouth / neck portion 102 of the container body 100, and a pouring portion 20 is erected from this top wall 10. The illustrated pouring portion is cylindrical.

[0020] In this embodiment, the attachment tube 4 is fitted onto the outer surface of the mouth / neck portion 102 . As shown in Figure 1 (A), the attachment tube 4 in the illustrated example consists of a lower tube portion 4a with a large inner diameter and an upper tube portion 4b with a small inner diameter, and the inner surface of the attachment tube 4 (lower tube portion 4a in the illustrated example) is provided with locking ridges 6 for locking onto the outer surface of the mouth / neck portion 102. However, these structures can be modified as appropriate. The upper end of the mounting tube 4 is integrally connected to the upper cover 30 via a hinge 8 . On the opposite side to the hinge 8, a recess 9 is formed on the outer surface of the mounting cylinder 4. Above the recess 9, a finger hook 42, which will be described later, is disposed.

[0021] The top wall 10 is connected to the entire periphery of the upper end of the attachment tube 4 so as to cover the upper surface of the mouth / neck portion 102 . As shown in FIG. 1(A), an annular engagement step 12 is formed on the outer periphery of the top wall 10, and an engagement ridge 13 is provided around the engagement step 12 for engaging with the lid peripheral wall 40 described below. A fitting peripheral wall 14 hangs down from the underside of the top wall 10 and is fitted liquid-tightly onto the inner surface of the neck portion 102 . Further, on the lower surface of the top wall 10, an annular groove 16 is provided along the inner surface of the mounting cylinder 4, positioned between the fitting peripheral wall 14 and the mounting cylinder 4. In addition, an annular recess 18 is formed on the upper surface of the top wall 10 along the lower end (base portion) of the pouring portion 20 .

[0022] The pouring part 20 has an upper end surface 22 which is a flat horizontal surface in this embodiment, and is formed so that a sealing lid 50 described below can be tightly attached to this upper end surface 22. A pouring outlet A is opened on the inside of the upper end surface 22. In the illustrated example, the pouring portion 20 is disposed in the center of the top wall 10, but the position of the point where the pouring portion 20 is erected (referred to as erected point e) can be changed as appropriate. As shown in FIG. 1(B), the upper end surface 22 of the pouring portion 20 is located at approximately the height of a communication port 38, which will be described later, when viewed from the side. In the illustrated example, a peripheral bottom surface 35 of a recessed portion 34 (described later) surrounding the communication port 38 and an upper end surface 22 of the spout portion 20 are arranged to be flush with each other. 1(A), the spout 20 of this embodiment is configured by a large-diameter, straight cylindrical lower cylindrical portion 20a, a tapered middle portion 20b having a small diameter at the upper end, and an almost straight cylindrical upper cylindrical portion 20c having a small diameter, which rises from the lower cylindrical portion 20a. However, these structures can be modified as appropriate. The shape of the lower cylindrical portion 20a is also arbitrary, but it can be formed into a cylindrical shape, for example. An inner cylinder 48, which will be described later, is fitted onto the outer surface of the lower cylinder portion 20a. The cylinder diameters and cylinder lengths of the middle portion 20b and upper cylinder portion 20c are designed so that the middle portion 20b or the upper cylinder portion 20c does not significantly protrude from the arc C shown in FIG. The arc C represents the path that the lower end 49 of the inner cylinder 48 traces with the hinge 8 as the center. This prevents the inner cylinder 48 from hitting the middle portion 20b or the upper cylinder portion 20c during the cover-opening operation shown in the figure, thereby preventing the cover-opening operation from being hindered. In this embodiment, a reduced diameter portion 24 is provided around the upper cylindrical portion 20c, and the upper end of a pouring hole 26 formed inside this reduced diameter portion 24 serves as the pouring outlet A described above. In the illustrated example, a thick annular rib is provided in the vertical direction from the inner surface of the upper cylindrical portion 20c as the reduced diameter portion 24. However, these structures may be modified as appropriate, and the reduced diameter portion 24 may be omitted.

[0023] An upper end surface 22 of the pouring portion 20 is disposed near the height of a peripheral bottom surface 35 of a recessed portion 34 described below. Specifically, in this embodiment, the upper end surface 22 of the pouring portion 20 and the peripheral bottom surface 35 of the recessed portion 34 are positioned on the imaginary horizontal line L shown in Figure 1(B) when viewed from the side so that the heights of these surfaces are the same. Although not shown, the upper end surface 22 of the pouring portion 20 may be positioned lower than the circumferential bottom surface 35 of the recessed portion 34 .

[0024] The upper lid 30 is formed by extending a lid peripheral wall 40 from the peripheral end side of the top plate 32, and one end of this lid peripheral wall 40 is connected to the cap body 2 via the hinge 8. The cap body 2 and the top cover 30 can be made of, for example, a synthetic resin material. In the illustrated example, the cap body 2 and the upper cover 30 are integrally molded via a thin hinge 8, and specifically, are molded in the expanded state shown in FIG. 3(A).

[0025] As shown in FIG. 1(A), in the illustrated example, the lid peripheral wall 40 has an engagement receiving portion 44 and an abutment rib 46 provided around the inner surface thereof. The engagement receiving portion 44 is disposed at the lower end of the lid peripheral wall 40 and is formed so as to engage with the engagement ridge 13 when the lid is in the closed state. The contact rib 46 is provided slightly above the engagement receiving portion 44 and contacts the outer periphery of the top wall 10 . A finger hook 42 is attached to the outer surface of the lid peripheral wall 40, located on the opposite side of the hinge 8.

[0026] The top plate 32 is connected to the lid peripheral wall 40 so as to face the top wall 10, and a communication opening 38 is formed in a part of the top plate 32. The top plate 32 in the illustrated example is formed as a horizontal plate portion. The communication port 38 is a portion for connecting the pouring outlet A to the outside, and is arranged above the pouring portion 20, and in the illustrated example is formed in the center of the top plate 32. The communication port 38 is covered by the sealing lid 50 in the closed state. The planar shape of the communication opening 38 is arbitrary, but a suitable example is a circular shape.

[0027] A recessed portion 34 for accommodating the sealing lid 50 is formed on the upper surface of the top plate 32, positioned around the communication opening 38. The recessed portion 34 is recessed from the surrounding top plate portion via a step portion 36 which is a vertical surface, and has a circumferential bottom surface 35 which is a horizontal flat surface that surrounds the communication opening 38 inside the step portion 36. The entire circumferential bottom surface 35 is used as an area for attaching the outer periphery 52 of the sealing lid 50 described below. This area is called the "attachment area" and is designated by the symbol P. This structure can be modified as appropriate, and the entire peripheral bottom surface 35 does not have to be adhered to the sealing lid 50 . The term "circumferential" means a shape that surrounds at least the entire periphery of the communication port 38, and includes, for example, an annular shape or a ring shape, but is not limited to these. 1, the depth of the recessed portion 34 in the illustrated example is greater than the thickness of the original seal lid 50. This allows the entire seal lid 50 to be housed inside the recessed portion 34, so that, for example, when the hinge cap of the present invention is dropped on the floor, the seal lid 50 can be prevented from hitting the floor. It is also possible to omit providing a recessed portion on the upper surface of top plate 32, and instead use all or a part of the upper surface of top plate 32, which is a horizontal plane (for example, the area around communication port 38), as attachment area P. In this case, it is preferable that upper end surface 22 of spout 20 is flush with the upper surface of top plate 32.

[0028] The communication port 38 is connected to the outlet 20 Lower cylindrical portion 20a An inner cylinder 48 is provided vertically to fit onto the outer surface of the outlet portion 20. A gap V is formed between the upper cylindrical portion 20c and the upper cylindrical portion 20a. The inner cylinder 48 is composed of an upper half cylinder portion 48a having a small inner diameter and a thick wall, and a lower half cylinder portion 48b having a large outer diameter and a thin wall. child of Lower half cylinder part 48b of An annular inner rib serving as sealing means S is provided around the inner surface, and this inner rib is pressed against the outer surface of the lower cylindrical portion 20a of the pouring portion 20 in a liquid-tight manner. However, the sealing means S may have any structure as long as it is formed between the inner tube 48 and the pouring portion 20, and may, for example, have a structure in which an annular outer rib attached to the outer surface of the pouring portion 20 is pressed against the inner surface of the inner tube 48. As will be described later, the spout A is sealed by the sealing lid 50, so by forming the sealing means S, the path from the spout A to the outside via the mounting tube 4 and the lid peripheral wall 40 can be blocked at two points, improving sealing performance.

[0029] In the illustrated example, a gap G is provided between the lower end of the inner cylinder 48 and the top wall 10 to provide a shock absorbing effect. For example, when a container with a cap attached is dropped to the floor, even if the top plate 32 is deformed due to the impact of the drop, the gap G allows the lower end 49 of the inner tube 48 to abut against the upper surface of the top wall 10, preventing further deformation. This makes it possible to prevent the seal lid 50 stretched between the upper end surface 22 of the pouring portion 20 and the circumferential bottom surface 35 of the recessed portion 34 from being affected by an impact, as will be described later. The inner tube 48 in the illustrated example hangs down to approximately the height of the upper surface of the top wall 10, and the annular recess 18 surrounding the base of the pouring portion 20 is provided on the top wall 10 side, thereby ensuring the gap G between the inner surface of this annular recess 18 and the lower end 49 of the inner tube 48. However, the gap G may be secured by shortening the length of the inner cylinder 48 .

[0030] The sealing lid 50 has the role of sealing the spout A, and is preferably formed as a single sheet material (including a film). In this specification, the term "sheet material" refers to a sheet-shaped object, and includes films. The sheet material that is the sealing lid 50 is stretched between the upper end surface 22 of the pouring portion 20 and the peripheral bottom surface 35 of the recessed portion 34 . Specifically, the outer portion (periphery 52) of the sealing lid 50 as viewed from above is adhered to the entire peripheral bottom surface 35, which is the aforementioned attachment area P, and the inner portion (center portion 54) of the sealing lid 50 as viewed from above is adhered to the upper end surface 22 of the pouring portion 20. In this embodiment, the outer peripheral portion 52 and the central portion 54 of the sealing lid 50 are both adhered to the corresponding adhered portions by heat welding. However, other adhesion methods may be used as long as the role and function of the sealing lid can be achieved. The adhesive strength of the outer peripheral portion 52 to the attachment region (circumferential bottom surface 35 of the recessed portion 34 ) is greater than the adhesive strength of the inner peripheral portion 54 to the upper end surface 22 of the pouring portion 20 . For this reason, in this embodiment, the area of ​​the welded portion of the circumferential bottom surface 35 of the recessed portion 34 is made larger than the area of ​​the welded portion of the upper end surface 22 of the pouring portion 20 . With this configuration, during the lid-opening operation shown in Figure 2, the center portion 54 of the sealing lid 50 peels off from the upper end surface 22 of the pouring portion 20, while the outer periphery 52 of the sealing lid 50 remains adhered to the attachment area P of the top plate 32 and does not peel off. As a result, the sealing lid 50 moves toward the upper lid 30 which rotates to the open position.

[0031] In the illustrated configuration, the center 54 of the sealing lid 50 is tightly fitted around the entire upper end surface 22 of the pouring portion 20, and the outer periphery 52 of the sealing lid 50 is also sealed around the entire periphery of the circumferential bottom surface 35. This makes it possible to block the path from the spout A to the outside via the peripheral edge of the sealing lid 50 and the stepped portion 36 at two locations, improving the sealing performance.

[0032] The sealing lid 50 can be a laminated sheet made of aluminum, paper, or the like. In this embodiment, the sealing lid 50 is formed as a barrier film. The barrier film can have a laminated structure of NY, EVOH, and LLDPE (for example, a structure in which the outer layer is NY, the middle layer is EVOH, and the inner layer is LLDPE), or a laminated structure of PET, EVOH, and LLDPE (for example, a structure in which the outer layer is PET, the middle layer is EVOH, and the inner layer is LLDPE). Here, NY stands for nylon, EVOH stands for EVAL, LLDPE stands for linear low density polyethylene, and PET stands for polyethylene terephthalate. It should be noted that aluminum may be used in place of EVOH. The sealing lid 50 may be made of the same resin material as the upper lid 30 and the cap body 2, with a sealing material inserted therein.

[0033] In the above configuration, the operation of attaching the sealing lid 50 to the cap body 2 and the top lid 30 will be described with reference to FIG. First, the cap body 2 and the seal lid 50 are molded in a state where they are opened 180 degrees as shown in FIG. 3(A). Next, as shown in FIG. 3(B), the upper lid 30 is closed onto the cap body 2, and then the sealing lid 50 is housed in the recessed portion 34 of the upper lid 30. As mentioned above, the circumferential bottom surface 35 of the recessed portion 34 and the upper end surface 22 of the pouring portion 20 are at approximately the same height (exactly the same height in the illustrated example), so simply placing the outer periphery 52 of the sealing lid 50 on the circumferential bottom surface 35 will bring the center portion 54 of the sealing lid 50 into contact with (or close to) the upper end surface 22 of the pouring portion 20. In this state, an adhesive bonding operation is performed in which the outer periphery 52 of the sealing lid 50 is heat-welded to the circumferential bottom surface 35 of the recessed portion 34, and the center portion 54 of the sealing lid 50 is heat-welded to the upper end surface 22 of the pouring portion 20, respectively. This completes the installation of the sealing lid 50 as shown in FIG. 3(C).

[0034] To release the sealed state of the spout A, from the state shown in FIG. 1, a finger is hooked on the finger hook portion 42, and the top lid 30 is rotated in the opening direction around the hinge 8 as shown in FIG. As a result, while the outer peripheral portion 52 of the sealing lid 50 remains adhered to the recessed portion 34 of the top lid 30, the adhesion between the center portion 54 of the sealing lid 50 and the upper end surface 22 of the pouring portion 20 is broken, and the center portion 54 and the upper end surface 22 are separated. As a result, the sealing lid 50 is moved to the upper lid 30 side.

[0035] According to the above-described configuration and operation, the sealing lid 50 is removed from the pouring portion 20 by opening the upper lid 30, which is convenient to use. Furthermore, the sealing lid 50 remains attached to the upper lid 30 even after the lid opening operation, so it does not become waste. Furthermore, since the upper end surface 22 of the pouring portion 20 is positioned near the height of the communication port 38 when viewed from the side, it is easy to attach the sealing lid 50 to both the upper end surface 22 of the pouring portion 20 and the attachment area P of the top plate 32. Furthermore, since the sealing lid 50 is housed in the recessed portion 34, the sealing lid 50 can be protected from contact with other objects. In addition, an inner tube 48 that fits onto the outer surface of the pouring portion 20 is suspended from the rim of the communication port 38, and a sealing means S is formed between the inner tube 48 and the pouring portion 20, thereby improving sealing performance. Furthermore, since the area of ​​the welded portion of the attachment area P of the top plate 32 is made larger than the area of ​​the welded portion of the upper end surface 22 of the pouring portion 20, it is possible to easily and accurately design a configuration in which the adhesive strength of the outer portion 52 to the attachment area P is greater than the adhesive strength of the inner portion 54 to the upper end surface 22 of the pouring portion 20. [Explanation of symbols]

[0036] 2...Cap body 4...Attachment tube 4a...Lower tube portion 4b...Upper tube portion 6...Latching ridge 8...Hinge 9...Recess 10...Top wall 12...Engagement step portion 13...Engagement protrusion 14...Fitting peripheral wall 16...Annular groove 18... Annular recess 20... Spout portion 20a... Lower cylindrical portion 20b... Middle portion 20c... Upper cylindrical portion 22... Upper end surface 24... Reduced diameter portion (annular rib) 26... Spout hole 30... Upper cover 32... Top plate 34... Recessed portion 35... Circumferential bottom surface 36... Step portion 38...Communication port 40: Lid peripheral wall 42: Finger hook portion 44: Engagement receiving portion 46: Contact rib 48...Inner cylinder 48a...Upper half cylinder part 48b...Lower half cylinder part 49...Lower end 50...Seal lid 52...Outer part (outer periphery) 54...Inner part (center) 100...container body 102...mouth and neck portion A...Outlet C...Arc e...Upright installation point G...Gap L...Imaginary horizontal line P...Sealing area S...Sealing means

Claims

1. a cap body (2) having a top wall (10) attached to the upper end of an attachment tube (4) attached to the mouth and neck portion (102) of a container body (100), and a pouring portion (20) erected from the top wall (10); an upper cover (30) in which one end of a lid peripheral wall (40) hanging down from the peripheral end side of a top plate (32) facing the top wall (10) is connected to the upper end side of the mounting tube (4) via a hinge (8); a sealing lid (50) that seals the pouring outlet (A) that opens at the upper end of the pouring part (20); In a hinge cap comprising: The top plate (32) has a communication port (38) opened therein, the communication port (38) being located above the upright portion (e) of the top wall (10) of the pouring portion (20). When viewed from above, an outer portion (52) of the sealing lid (50) is non-removably adhered to an attachment area (P) set on the surface of the top plate (32), and an inner portion (54) of the sealing lid is in close contact with the upper end surface (22) of the pouring portion (20) and is formed so as to be removably attached from the upper end surface (22) by opening the top lid (30). The pouring portion (20) is formed by erecting a small-diameter upper cylindrical portion (20c) from a large-diameter lower cylindrical portion (20a), A hinge cap characterized in that an inner tube (48) that fits onto the outer surface of the lower tubular portion (20a) is suspended from the rim of the communication port (38), and a gap (V) is formed between the inner tube (48) and the upper tubular portion (20c).

2. The attachment area (P) is a circumferentially set area surrounding the communication port (38) on the upper surface of the top plate (32), The sealing lid (50) is formed as a single sheet material, 2. The hinge cap according to claim 1, wherein the upper end surface (22) of the spout (20) is located at approximately the same height as the communication port (38) when viewed from the side.

3. The top plate (32) is formed with a recessed portion (34) having a peripheral bottom surface (35) surrounding the communication port (38), The sealing lid (50) is housed in the recessed portion (34), 3. The hinge cap according to claim 1 or 2, wherein the peripheral bottom surface (35) is adhered to the outer portion (52) of the sealing lid (50) as the attachment area (P).

4. 4. The hinge cap according to claim 1, wherein a sealing means (S) is formed between the inner cylinder (48) and the lower half cylinder portion (20a).

5. The outer portion (52) of the sealing lid (50) is welded to the attachment area (P) of the top plate (32), and the inner portion (54) of the sealing lid is welded to the upper end surface (22) of the spout portion (20), 5. The hinge cap according to claim 1, wherein the welding area of ​​the attachment area (P) of the top plate (32) is larger than the welding area of ​​the upper end surface (22) of the spout portion (20).

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