JP2023124474A - hinge cap - Google Patents

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 The present invention relates to a hinge cap, and more specifically to a hinge cap that is attached to the mouth and neck of a container body and used for dispensing contents.

As this type of hinge cap, a cap body having a spout opened in a top plate covering the upper surface of the mouth and neck, an upper lid connected to one end of the cap body via a hinge, and a sealing film sealing the spout (seal lid) has been known (Patent Document 1).

Patent No. 4580049

The hinge cap of Patent Literature 1 requires a troublesome task of peeling off the seal lid from the spout before use.
In addition, the peeled seal lid is scattered as dust, and there is a possibility that the dust may be mixed in an unintended place by mistake.

SUMMARY OF THE INVENTION A first object of the present invention is to provide a hinge cap that can easily peel off a seal lid that closes a spout.
A second object of the present invention is to avoid the peeled seal lid from becoming waste.

The first means is a cap body 2 having a top wall 10 attached to the upper end of a mounting cylinder 4 mounted on a mouth/neck portion 102 of a container body 100 and having a spout portion 20 erected from the top wall 10;
a top lid 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 cylinder 4 via a hinge 8;
a seal lid 50 for sealing the spout A opening at the upper end of the spout portion 20;
A hinge cap comprising:
The top plate 32 is provided with a communication port 38 located above the standing portion e of the pouring portion 20 in the top wall 10,
As viewed from above, the outer portion 52 of the seal lid 50 is non-peelably adhered to the attachment area P set on the surface of the top plate 32, and the inner portion 54 of the seal lid It is in close contact with the upper end surface 22 of the projecting portion 20 and formed so as to be peelable from the upper end surface 22 by opening the upper lid 30 .

In this means, as shown in FIG. 1(A), a top lid 30 is connected via a hinge 8 to a cap body 2 having a spout portion 20 erected from a top wall 10, and the upper end of the spout portion 20 is A sealing lid 50 seals the open spout A. - 特許庁
A communicating port 38 is formed in the top plate 32 so as to be positioned above at least the portion where the spout portion 20 is erected from the top wall 10 (spout portion standing portion e).
An outer portion 52 of the seal lid 50 seen from above is non-peelably adhered to an appropriate portion (attachment region P) of the surface of the top plate 32 . The inner portion 54 of the seal lid, viewed from above, is in close contact with the upper end surface 22 of the pouring portion 20 and is formed to be peelable from the upper end surface 22 by opening the upper lid 30. It is
According to this structure, the seal lid 50 is removed from the pouring portion 20 by opening the top lid 30, which is convenient.
Further, since the seal lid 50 remains attached to the upper lid 30 even after the lid opening operation, it does not become dust.

The second means has the first means, and the pasting area P is a circumferentially set area surrounding the communication opening 38 on the upper surface of the top plate 32,
The seal lid 50 is formed as a single sheet material,
The upper end surface 22 of the spout portion 20 is arranged near the height of the communication port 38 when viewed from the side.

In this means, as shown in FIG. 1A, the upper end face 22 of the pouring portion 20 is arranged near the height of the communication port 38 when viewed from the side.
According to this structure, the seal lid 50 can be attached to both the upper end surface 22 of the spout portion 20 and the attachment area P of the top plate 32 in one operation, and the attachment work is easy. .

The third means has the first means or the second means, and the top plate 32 is formed with a recessed portion 34 having a circumferential bottom surface 35 surrounding the communication port 38,
The seal lid 50 is accommodated in the recessed portion 34,
The circumferential bottom surface 35 is adhered to the outer portion 52 of the seal lid 50 as the pasting area P. As shown in FIG.

In this means, as shown in FIG. 1(B), the seal lid 50 is accommodated in the recessed portion 34. As shown in FIG.
This structure can protect the seal lid 50 from contact with other objects.
Also, the circumferential bottom surface 35 of the recessed portion 34 is adhered to the outer portion 52 of the seal lid 50 .
As a result, the seal lid 50 can be adhered to the upper lid 30 more reliably.

The fourth means has any one of the first to third means, and an inner cylinder 48 fitted to the outer surface of the pouring portion 20 is vertically provided from the rim of the communication port 38. A sealing means S is formed between the inner cylinder 48 and the pouring portion 20 .

In this means, as shown in FIG. 1, an inner cylinder 48 is vertically provided from the rim of the communication port 38 and fitted to the outer surface of the pouring part 20. The inner cylinder 48 and the pouring part 20 A sealing means S was formed between.
This structure improves the sealing performance.

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

In this means, the outer portion 52 of the seal lid 50 is welded to the pasting region P of the top plate 32, and the inner portion 54 of the seal lid is welded to the upper end surface 22 of the spout portion 20. The area of the welded portion of the sticking region P of the plate 32 is made larger than the area of the welded portion of the upper end surface 22 of the spout portion 20 .
According to this structure, the adhesive force of the outer portion 52 to the sticking region P is greater than the adhesive force of the inner portion 54 to the upper end surface 22 of the spout portion 20, so that the configuration can be simply and accurately designed. Therefore, the sealing lid can be reliably peeled off from the pouring portion 20 when the lid is opened.

ADVANTAGE OF THE INVENTION According to this invention, the sealing cover which close|closes a spout can be peeled off easily.
Moreover, according to the present invention, the peeled seal lid is not scattered as dust.

It is sectional drawing of the hinge cap which concerns on embodiment of this invention, The same figure (A) is the whole view of the said hinge cap, The same figure (B) is an enlarged view of the principal part of a hinge cap. 1. It is explanatory drawing of the lid-opening operation of the hinge cap shown in FIG. FIG. 2 is a diagram showing the manufacturing stage of the hinge cap shown in FIG. 1, where (A) is the molding stage of the cap, and (B) is the stage before attaching the sealing lid to the molded hinge cap. and (C) of FIG.

1 to 3 show hinge caps according to embodiments of the present invention. This hinge cap is composed of a cap body 2, an upper lid 30 and a sealing lid 50. - 特許庁

The cap main body 2 has a top wall 10 attached to the upper end of a mounting cylinder 4 that is mounted on the mouth/neck portion 102 of the container body 100 , and a spout portion 20 is erected from the top wall 10 .
In addition, the extraction part of the example of illustration is a cylinder shape.

The mounting cylinder 4 is fitted to the outer surface of the mouth/neck portion 102 in this embodiment.
As shown in FIG. 1A, the mounting cylinder 4 of the illustrated example comprises a lower cylindrical portion 4a having a large inner diameter and an upper cylindrical portion 4b having a small inner diameter. A locking projection 6 for locking to the outer surface of the mouth/neck portion 102 is provided on the inner surface.
However, these structures can be changed as appropriate.
The upper end of the mounting cylinder 4 is integrally connected to the upper lid 30 via a hinge 8. As shown in FIG.
A recess 9 is formed in the outer surface of the mounting cylinder 4 on the side opposite to the hinge 8 . A finger hook portion 42, which will be described later, is arranged above the recess 9. As shown in FIG.

The top wall 10 is connected to the entire circumference of the upper end of the mounting cylinder 4 so as to cover the upper surface of the mouth/neck portion 102 .
As shown in FIG. 1A, an annular engaging stepped portion 12 is formed on the outer circumference of the top wall 10, and the engaging stepped portion 12 is engaged with a lid peripheral wall 40, which will be described later. Engagement ridges 13 for stopping are provided around the periphery.
From the lower surface of the top wall 10, a fitting peripheral wall 14 is vertically provided to be fitted to the inner surface of the mouth/neck portion 102 in a liquid-tight manner.
An annular groove 16 is provided on the lower surface of the top wall 10 so as to be positioned between the fitting peripheral wall 14 and the mounting cylinder 4 along the inner surface of the mounting cylinder 4 .
An annular concave portion 18 is formed on the upper surface of the top wall 10 along the lower end portion (root portion) of the spout portion 20 .

The spout portion 20 has an upper end surface 22 that is a flat horizontal surface in this embodiment, and is formed so that a seal lid 50, which will be described later, can be brought into close contact with the upper end surface 22. As shown in FIG. A spout A is opened inside the upper end surface 22 .
In the illustrated example, the spouting portion 20 is arranged in the central portion of the top wall 10, but the position of the portion where the spouting portion 20 is erected (referred to as a standing portion e) can be changed as appropriate. .
Further, as shown in FIG. 1B, the upper end face 22 of the pouring portion 20 is arranged near the height of a communication port 38, which will be described later, when viewed from the side.
In the illustrated example, the circumferential bottom surface 35 of the recessed portion 34 (to be described later) surrounding the communication port 38 and the upper end surface 22 of the spout portion 20 are arranged to be at the same height.
As shown in FIG. 1(A), the pouring part 20 of the present embodiment extends from a large-diameter, straight-cylindrical lower cylinder part 20a through a tapered middle part 20b with a small diameter at the upper end, and a small-diameter, substantially straight cylinder. The upper cylindrical portion 20c is erected. However, these structures can be changed as appropriate.
Although the shape of the lower cylindrical portion 20a is also arbitrary, it can be formed in a cylindrical shape, for example.
An inner cylinder 48, which will be described later, is fitted to the outer surface of the lower cylinder portion 20a. The diameter and length of the intermediate portion 20b and the upper tubular portion 20c are designed so that the intermediate portion 20b and the upper tubular portion 20c do not protrude greatly from the arc C shown in FIG.
The arc C represents the trajectory drawn by the lower end 49 of the inner cylinder 48 with the hinge 8 as the center.
This prevents the inner cylinder 48 from coming into contact with the intermediate portion 20b or the upper cylinder portion 20c during the lid opening operation shown in FIG.
Further, in this embodiment, a diameter-reduced portion 24 is provided around the upper cylindrical portion 20c, and the upper end of a spout hole 26 formed inside the diameter-reduced portion 24 serves as the above-mentioned spout A. .
In the illustrated example, as the reduced diameter portion 24, a thick annular rib is attached in the vertical direction from the inner surface of the upper cylindrical portion 20c. However, these structures can be changed as appropriate, and the reduced-diameter portion 24 can be omitted.

The upper end surface 22 of the spout portion 20 is arranged near the height of a circumferential bottom surface 35 of a concave portion 34, which will be described later.
Specifically, in the present embodiment, the upper end surface 22 and the circumferential bottom surface 35 of the recessed portion 34 are placed sideways so that the top surface 22 of the pouring portion 20 and the circumferential bottom surface 35 of the recessed portion 34 have the same height. When viewed from the side, it is arranged on the imaginary horizontal line L shown in FIG. 1(B).
Although not shown, the upper end surface 22 of the spout portion 20 may be arranged lower than the circumferential bottom surface 35 of the recessed portion 34 .

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

As shown in FIG. 1A, the lid peripheral wall 40 has an engagement receiving portion 44 and a contact rib 46 provided around its inner surface in the illustrated example.
The engagement receiving portion 44 is arranged at the lower end portion of the lid peripheral wall 40 and is formed so as to engage with the engagement ridge 13 in the lid closed state.
The contact rib 46 is provided slightly above the engagement receiving portion 44 and contacts the outer peripheral portion of the top wall 10 .
A finger hooking portion 42 is provided on the outer surface of the lid peripheral wall 40 on the opposite side of the hinge 8 .

The top plate 32 is connected to the lid peripheral wall 40 so as to face the top wall 10 , and a communication port 38 is formed in a part of the top plate 32 .
The illustrated top plate 32 is formed as a horizontal plate portion.
The communication port 38 is a portion for connecting the outlet A to the outside, is arranged above the outlet 20, and is formed at the center of the top plate 32 in the illustrated example. .
The communication port 38 is covered with the seal lid 50 in the closed state.
Although the planar shape of the communication port 38 is arbitrary, a circular shape can be used as a preferred example.

A concave portion 34 is formed on the top surface of the top plate 32 so as to be positioned around the communication port 38 and accommodate the seal lid 50 .
The recessed portion 34 is recessed from the surrounding top plate portion via a stepped portion 36 which is a vertical surface. 35. The entire circumferential bottom surface 35 is used as a region for attaching an outer peripheral portion 52 of a seal lid 50, which will be described later. This area is referred to as a "pasted area" and is denoted by P.
This structure can be modified as appropriate, and the entire circumferential bottom surface 35 need not be adhered to the seal lid 50 .
Note that the “circumferential shape” may be any shape that surrounds at least the entire periphery of the communication port 38 , and includes, for example, an annular shape and a ring shape, but is not limited to these.
Also, the depth of the illustrated recess 34 is greater than the thickness of the stated sealing lid 50, as shown in FIG. By doing so, the entire seal lid 50 is housed inside the recessed portion 34, so that when the hinge cap of the present invention is dropped on the floor, for example, the seal lid 50 can be prevented from hitting the floor surface.
It is also possible to omit the provision of the concave portion on the upper surface of the top plate 32, and use all or part of the upper surface of the top plate 32, which is a horizontal surface, as the pasting area P (for example, the portion around the communication port 38). In this case, the upper end surface 22 of the pouring portion 20 is preferably flush with the upper surface of the top plate 32 .

An inner cylinder 48 is vertically provided from the communication port 38 so as to be fitted to the outer surface of the spout portion 20 . The illustrated inner cylinder 48 comprises an upper semi-cylindrical portion 48a having a small inner diameter and a thick wall, and a lower semi-cylindrical portion 48b having a large outer diameter and a thin wall. An annular inner rib as a sealing means S is provided around the inner surface of the inner cylinder 48 (lower half cylinder portion 48b in the illustrated example). is in liquid-tight pressure contact with the outer surface of the
However, the sealing means S may have any structure as long as it is formed between the inner cylinder 48 and the spouting portion 20. For example, an annular outer rib attached to the outer surface of the spouting portion 20 may A structure in which it is pressed against the inner surface of the cylinder 48 may be used.
As will be described later, the spout A is sealed by the sealing lid 50. Therefore, by forming the sealing means S, a path from the spout A to the outside via between the mounting cylinder 4 and the lid peripheral wall 40 can be formed. can be blocked at two points, and the sealing performance is improved.

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 thereto drops on the floor, even if the top plate 32 is deformed due to the impact of the drop or the like, the lower end 49 of the inner cylinder 48 is kept from the upper surface of the top wall 10. to prevent further deformation.
As a result, as will be described later, it is possible to avoid impact on the seal lid 50 stretched between the upper end surface 22 of the spout portion 20 and the circumferential bottom surface 35 of the recessed portion 34 .
The inner cylinder 48 of the illustrated example hangs down to the vicinity of the height of the top surface of the top wall 10 , and the annular recess 18 surrounding the base of the spout portion 20 is provided on the top wall 10 side so that the annular The gap G is secured between the inner surface of the recess 18 and the lower end 49 of the inner cylinder 48 .
However, the gap G may be ensured by shortening the cylinder length of the inner cylinder 48 .

The seal lid 50 has a 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 material and includes a film.
A sheet material, which is the seal lid 50 , is stretched between the upper end surface 22 of the spout portion 20 and the circumferential bottom surface 35 of the recessed portion 34 .
Specifically, the outer portion (peripheral portion 52) of the seal lid 50 viewed from above is adhered to the entire circumferential bottom surface 35, which is the pasting region P, and the upper portion of the seal lid 50 is attached. The inner portion (central portion 54 ) seen from the top is adhered to the upper end surface 22 of the spout portion 20 .
In this embodiment, both the outer peripheral portion 52 and the central portion 54 of the seal lid 50 are adhered to the corresponding portions to be adhered by thermal welding. However, another bonding method may be used as long as the role and function of the sealing lid can be achieved.
The adhesive force of the outer peripheral portion 52 to the attachment area (the circumferential bottom surface 35 of the recessed portion 34 ) is assumed to be greater than the adhesive force of the inner peripheral portion 54 to the upper end surface 22 of the spout portion 20 .
Therefore, in the present 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 spout portion 20 .
With this configuration, in the lid opening operation shown in FIG. 2, the central portion 54 of the sealing lid 50 is separated from the upper end surface 22 of the pouring portion 20, and the outer peripheral portion 52 of the sealing lid 50 is removed from the ceiling. It is possible to prevent peeling while adhering to the sticking area P of the plate 32 .
As a result, the seal lid 50 moves toward the upper lid 30 rotating to the open lid position.

In the illustrated configuration, the central portion 54 of the seal lid is in close contact with the entire circumference of the upper end surface 22 of the spout portion 20, and the outer peripheral portion 52 of the seal lid 50 is also attached to the circumferential bottom surface. 35 is sealed all around.
As a result, the path from the spout A to the outside via between the peripheral edge of the seal lid 50 and the stepped portion 36 can be blocked at two points, thereby improving the sealing performance.

The seal lid 50 can be a laminated sheet made of aluminum, paper, or the like.
Further, in this embodiment, the seal lid 50 is formed as a barrier film.
The barrier film has a laminated structure of NY, EVOH, and LLDPE (for example, a structure in which the outer layer is NY, the intermediate layer is EVOH, and the inner layer is LLDPE), or a laminated structure of PET, EVOH, and LLDPE (for example, the outer layer is PET, and the inner layer is LLDPE). A structure in which the intermediate layer is EVOH and the inner layer is LLDPE).
Here, NY means nylon, EVOH means EVAL, LLDPE means Linear Low Density Polyethylene, and PET means polyethylene terephthalate.
Note that aluminum may be employed instead of EVOH.
Also, the seal lid 50 may be made of the same resin as the upper lid 30 and the cap main body 2 with a seal material inserted therein.

In the above configuration, the operation of attaching the sealing lid 50 to the cap main body 2 and the upper lid 30 will be described with reference to FIG.
First, the cap main body 2 and the seal lid 50 are molded in a state opened 180 degrees as shown in FIG. 3(A).
Next, as shown in FIG. 3B, the upper lid 30 is closed with respect to the cap main body 2, and then the seal lid 50 is accommodated in the concave portion 34 of the upper lid 30. Next, as shown in FIG.
As described above, since the circumferential bottom surface 35 of the recessed portion 34 and the upper end surface 22 of the pouring portion 20 are substantially the same height (exactly the same height in the illustrated example), the outer peripheral portion 52 of the sealing lid 50 is simply removed as described above. Only by placing it on the circumferential bottom surface 35 , the center portion 54 of the seal lid 50 comes into contact with (or close to) the upper end surface 22 of the spout portion 20 .
From this state, the outer peripheral portion 52 of the seal lid 50 is thermally welded to the circumferential bottom surface 35 of the recessed portion 34, and the central portion 54 of the seal lid 50 is thermally welded to the upper end surface 22 of the spout portion 20. do the work.
Then, the mounting of the seal lid 50 is completed as shown in FIG. 3(C).

In order to cancel the closed state of the spout A, put a finger on the finger hook 42 from the state shown in FIG. .
Then, the adhesion between the central portion 54 of the seal lid 50 and the upper end surface 22 of the spout portion 20 is broken while the adhesion of the outer peripheral portion 52 of the seal lid 50 to the recessed portion 34 of the upper lid 30 is maintained. The central portion 54 and the upper end surface 22 are separated.
As a result, the seal lid 50 is moved to the upper lid 30 side.

According to the above configuration and action, the seal lid 50 is removed from the pouring portion 20 by opening the top lid 30, which is convenient.
Further, since the seal lid 50 remains attached to the upper lid 30 even after the lid opening operation, it does not become dust.
Further, since the upper end surface 22 of the pouring portion 20 is arranged near the height of the communication port 38 when viewed from the side, the seal lid 50 is positioned between the upper end surface 22 of the pouring portion 20 and the top plate 32 . It is easy to stick over both of the sticking regions P.
Further, since the seal lid 50 is accommodated in the recessed portion 34, the seal lid 50 can be protected from contact with other objects.
An inner cylinder 48 is vertically provided from the rim of the communication port 38 and fitted to the outer surface of the spouting portion 20. A sealing means S is formed between the inner cylinder 48 and the spouting portion 20. The sealing performance is improved.
In addition, since 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 spout portion 20, the adhesive strength of the outer portion 52 to the attachment area P is greater than that of the spout portion 20. It is possible to simply and accurately design a configuration that is greater than the adhesive force of the inner portion 54 to the upper end surface 22 of the.

DESCRIPTION OF SYMBOLS 2... Cap main body 4... Mounting cylinder 4a... Lower cylinder part 4b... Upper cylinder part 6... Locking protrusion 8... Hinge 9... Recess
DESCRIPTION OF SYMBOLS 10... Top wall 12... Engagement step part 13... Engagement rib 14... Fitting peripheral wall 16... Annular groove 18... Annular recessed part 20... Extraction part 20a... Lower cylinder part 20b... Intermediate part 20c... Upper cylinder part 22 ... Upper end surface 24 ... Reduced diameter portion (annular rib) 26 ... Spout hole 30 ... Upper lid 32 ... Top plate 34 ... Recessed portion 35 ... Circular bottom surface 36 ... Stepped portion 38 ... Communication port
40... Lid peripheral wall 42... Finger hanging part 44... Engagement receiving part 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 (peripheral part) 54... Inner part (central part)
DESCRIPTION OF SYMBOLS 100... Container body 102... Mouth-and-neck part A... Spout C... Circular arc e... Standing location G... Gap L... Imaginary horizontal line P... Pasting area S... Sealing means

Claims (5)

A top wall (10) is attached to the upper end of a mounting cylinder (4) that is mounted on the mouth/neck portion (102) of the container body (100), and a spout portion (20) is erected from the top wall (10). a cap body (2);
A top lid 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 cylinder (4) via a hinge (8). (30) and
a seal lid (50) for sealing the spout (A) opening at the upper end of the spout (20);
A hinge cap comprising
The top plate (32) has a communication port (38) located above the standing portion (e) of the spout portion (20) in the top wall (10),
When viewed from above, the outer portion (52) of the seal lid (50) is non-peelably adhered to the attachment area (P) set on the surface of the top plate (32), and the seal lid The inner part (54) of the is in close contact with the upper end surface (22) of the pouring part (20), and is formed so as to be peelable from the upper end surface (22) by opening the upper lid (30). A hinge cap, characterized in that: The pasting area (P) is a circumferential area set on the upper surface of the top plate (32) surrounding the communication opening (38),
The seal lid (50) is formed as a single sheet material,
2. The hinge cap according to claim 1, wherein an upper end surface (22) of said spout (20) is arranged near the height of said communication opening (38) when viewed from the side. The top plate (32) is formed with a recessed portion (34) having a circumferential bottom surface (35) surrounding the communication port (38),
The seal lid (50) is housed in the recess (34),
3. A hinge cap according to claim 1 or 2, characterized in that said circumferential bottom surface (35) is adhered to said outer portion (52) of said sealing lid (50) as said sticking area (P). An inner cylinder (48) fitted to the outer surface of the spouting part (20) is vertically provided from the rim of the communication port (38). 4. A hinge cap according to any one of claims 1 to 3, characterized in that a sealing means (S) is formed between and. The outer portion (52) of the seal lid (50) is attached to the attachment region (P) of the top plate (32), and the inner portion (54) of the seal lid is attached to the upper end surface (22) of the spout portion (20). are welded to each,
5. Any one of claims 1 to 4, wherein the welded area of the pasting region (P) of the top plate (32) is larger than the welded area of the upper end surface (22) of the spout (20). hinge cap.

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