JP6894308B2 - Mouth plug and container with spout - Google Patents

Description

The present invention relates to a spout (plug device) for a container and a container with a spout.

As this type of plug device, the plug body is formed by hanging the plug peripheral wall from the outer periphery of the top plate having a large-diameter opening, and the upper part of the outer circumference of the plug body is covered so as to openably cover the upper surface of the top plate. It is known that the plug lid is hinged via a hinge portion and has a small-diameter spout that communicates with the opening (Patent Document 1).

Japanese Patent Application Laid-Open No. 10-17002

In the plug device of Patent Document 1, the contents are taken out from a small-diameter discharge port during normal use, the contents are used up, and when a new content is filled, the plug lid is opened to open the opening. Since the contents can be filled from the part, it has the feature of being convenient.
The present invention is intended to develop a better one while taking advantage of the features of the prior art, and a specific object of the present invention is.
The first is to provide a spout that is configured to lock the cap against the plug body when the cap does not need to be opened.
The second is to provide a spout that can be easily released by operating the operation arm that extends between the plug body and the plug lid.
Thirdly, it is to provide a container with a spout that allows easy operation of the operation arm.
Fourth, to provide a container with a spout in which the spout with an operation arm is compactly incorporated into the mouth and neck of the container body.

The first means is a spout,
A stopper body 12 for fitting the container to the mouth and neck, which is formed by hanging the stopper peripheral wall 18 from the outer periphery of the top plate 14 having the opening 16.
The opening 16 is hinged to the upper periphery of the stopper body 12 via a first hinge portion 24 so as to cover the upper surface of the top plate 14 so as to be openable and closable, and communicates with the opening 16. A stopper lid 26 having a smaller diameter spout 30 and
An operation arm 40 formed between the plug lid 26 and the plug peripheral wall 18 at a place other than the connection point by the first hinge portion 24, and
With
The operation arm 40 projects downward from the outer peripheral portion of the plug lid 26 via the second hinge portion 38 so that the operation arm 40 can rotate downward and laterally around the second hinge portion 38. And
An engaging recess a1 is provided on one of a part of the operating arm 40 in the protruding direction and a corresponding portion of the plug peripheral wall 18, and an engaging convex portion a2 that can be fitted into the engaging recess a1 is formed on the other. A locking means A for locking the plug lid 26 to the closed position is formed by fitting the engaging convex portion a2 into the engaging concave portion a1.
The operating arm 40 is provided so as to be disengaged from the inside of the engaging recess a1 by rotating the operating arm 40 outward from the side, and the locked state of the plug lid 26 is released.
The first hinge portion 24 is arranged on one side of the plug peripheral wall 18 of the plug main body 12 in the tubular radial direction, and the second hinge portion 38 is arranged on the other side. A knob 42 is formed on the tip E2 side, which is the lower end.
Positioned above the second hinge portion 38, the engaging piece 36 projects laterally outward from the outer peripheral portion of the plug lid 26, and the operating arm 40 extends laterally outward from a position extending downward. By pulling it up to the position and then rotating it further upward, the base end E1 side of the operation arm 40 comes into contact with the engaging piece 36, and the plug lid 26 is pulled up so that the lid can be opened.
The operation arm 40 is formed as a plate material substantially along the outer surface of the plug peripheral wall 18, and both side portions 40a in the width direction located on both sides of the intermediate portion 40b in the width direction and the intermediate portion 40b in the width direction of the plate material. Including and
Both side portions 40a of the plate material in the width direction are connected to the stopper lid 26 via a pair of second hinge portions 38, and the plate material is connected to the stopper lid 26.
The stopper lid 26 has a stopper cylinder 32 fitted in the opening 16.
By rotating the operation arm 40, the pressure welding end portion 43 formed on the base end side of the widthwise intermediate portion 40b is formed so as to be pressure-welded to the engaging piece 36 .

In this means, the stopper body 12 having the opening 16 and the stopper lid 26 having the spout 30 are connected via the first hinge portion 24, and the second hinge portion 38 is connected from the outer peripheral portion of the stopper lid 26. An operation arm 40 is provided so as to be projected downward so as to be able to rotate between the lower side and the outer side around the second hinge portion 38.
Then, an engaging recess a1 is provided on one of a part of the operating arm in the protruding direction and a corresponding portion of the plug peripheral wall 18, and an engaging convex portion a2 that can be fitted into the engaging recess a1 is provided on the other side. Therefore, the locking means A for locking the plug lid 26 to the closed position is formed by fitting the engaging convex portion a2 into the engaging concave portion a1.
As a result, the stopper lid 26 can be prevented from being opened unexpectedly, and for example, when filling the contents, the operation arm 40 is rotated outward to the side, whereby the engaging convex portion a2. Is disengaged from the engaging recess a1 and the locked state of the plug lid 26 can be released.

In the illustrated example, the engaging concave portion a1 is provided on the operation arm 40 side, and the engaging convex portion a2 is provided on the plug peripheral wall 18 side. On the contrary, the engaging convex portion a2 is provided on the operating arm 40 side. An engaging recess a1 may be provided on the plug peripheral wall 18 side.
The "engagement recess" is a hole (engagement hole) penetrating the operation arm or the plug peripheral wall cylinder, and is recessed in a portion of one surface of the operation arm or the plug peripheral wall cylinder facing the other. It may be a hole (engagement hole).

Further, in this means, it is proposed to arrange the first hinge portion 24 on one side of the plug peripheral wall 18 of the plug body 12 in the radial direction (horizontal direction in FIG. 1) and the second hinge portion 38 on the other side. ing. Then, in the locked state shown in FIG. 1, a knob portion 42 is formed on the tip E2 side, which is the lower end of the operation arm 40. According to this configuration, the knob portion 42 of the operation arm 40 is moved forward in the section from FIG. 1 to FIG. 7 (A), and forward and upward in the section from FIG. 7 (A) to FIG. 7 (B). In the section from (B) to FIG. 7 (D) via FIG. 7 (C), it may be pulled upward and backward, and although there is a change in the pulling direction, the pulling direction is continuous, so that the operation is easy.

Further, in this means, the engaging piece 36 is positioned above the second hinge portion 38, and the engaging piece 36 projects outward from the outer peripheral portion of the plug lid 26. As a result, the operation arm 40 is pulled up from a position extending downward to a position extending outward and then rotated further upward, so that the base end E1 side of the operation arm 40 comes into contact with the engaging piece 36. The stopper lid 26 is pulled up, and the stopper cylinder 32 is pulled out from the opening 16 to open the lid. At this time, since the plug lid 26 and the operation arm 40 act as levers with the first hinge portion 24 as a fulcrum, the plug cylinder 32 of the plug lid 26 can be easily separated from the opening 16.

Further, in this means, as shown in FIG. 3, the operation arm 40 is formed by a pair of both side portions 40a in the width direction and an intermediate portion 40b in the width direction, and the base end side of both side portions 40a in the width direction is a pair of left and right second hinge portions. It is connected to the plug lid 26 via 38. The pressure welding end portion 43 formed on the base end side of the widthwise intermediate portion 40b abuts on the engaging piece 36 of the plug lid 26 by the rotational operation of the operation arm 40. Since the operating arm 40 rotates around the pair of second hinge portions 38 in this way, the movement of the operating arm 40 during rotation is less likely to be shaken, and the pressure welding end portion 43 is securely attached to the engaging piece 36. It can be pressure-welded.

The second means has the first means , and the plug body 12, the plug lid 26, and the operation arm 40 are integrally formed via the first hinge portion 24 and the second hinge portion 38. ..

In this means, the plug body 12 and the plug lid 26 are integrally molded via the first hinge portion 24, and the plug lid 26 and the operation arm 40 are integrally molded via the second hinge portion 38. This avoids an increase in the number of parts.

The third means is a container with a spout,
A container body 2 that erects the mouth and neck 6 from the body 4 and
The spout 10 which is described in the first means or the second means and in which the plug peripheral wall 18 is fitted to the upper half portion 6b of the mouth neck portion 6 is provided.
The lower half portion 6a of the mouth neck portion 6 has a larger outer diameter portion than the upper half portion 6b of the mouth neck portion 6, and the first hinge portion 24, the second hinge portion 38, and the operation arm are viewed from above. 40 is formed so as to fit within the contour of the lower half portion 6a.

In this means, the lower half portion 6a of the mouth neck portion 6 shown in FIG. 1 has a larger outer diameter portion than the upper half portion 6b of the mouth neck portion 6, and the first hinge portion 24 and the first hinge portion 24 and the first hinge portion 24 are viewed from above. The two hinge portions 38 and the operation arm 40 are formed so as to fit within the contour of the lower half portion 6a. As a result, the spout 10 with the operation arm 40 can be compactly assembled to the container body 2.

According to the invention according to the first means, the operation arm 40 is projected downward from the outer peripheral portion of the stopper lid 26 provided so as to open and close the upper surface of the top plate 14 of the stopper body 12 via the second hinge portion 38, and this operation is performed. An engaging recess a1 is provided on one of a part of the protruding direction of the arm 40 and a corresponding portion of the plug peripheral wall 18, and an engaging convex portion a2 that can be fitted into the engaging recess a1 is provided on the other. Since the plug lid 26 is locked to the closed position by fitting the engaging convex portion a2 into the joint recess a1, it is possible to prevent the plug lid 26 from being inadvertently opened during use.
Further , the first hinge portion 24 is arranged on one side of the plug peripheral wall 18 of the plug main body 12 in the tubular radial direction, and the second hinge portion 38 is arranged on the other side, and the knob portion 42 is located on the tip E2 side of the operation arm 40. The grip portion 42 is picked up, pulled up from the second hinge portion 38, and then pulled toward the first hinge portion 24 side to separate the engaging convex portion a2 from the engaging concave portion a1 and further plugged. The plug lid 26 can be removed from the top plate 14 of the main body 12, and the direction of the pulling operation is continuous, so that it is easy to use.
Further, by pulling up the operation arm 40, the base end E1 side of the operation arm 40 can hit the engaging piece 36 protruding outward from the outer peripheral portion of the plug lid 26 to open the plug lid 26. Since it is provided, the stopper lid 26 can be opened with a small force by the action of a lever with the first hinge portion 24 as a fulcrum.
Furthermore, since both side portions 40a of the plate material, which is the operation arm 40, are connected to the plug lid 26 via a pair of second hinge portions 38, the operation arm 40 centering on the second hinge portion 38 The rotation can be stabilized, and rattling or the like is less likely to occur when the base end E1 side of the widthwise intermediate portion 40b of the plate material is in pressure contact with the engaging piece 36.
According to the invention according to the second means, since the stopper body 12, the stopper lid 26, and the operation arm 40 are integrally molded via the first hinge portion 24 and the second hinge portion 38, the number of parts is reduced. can do.
According to the invention according to the third means, the lower half portion 6a of the mouth neck portion 6 has a larger outer diameter portion than the upper half portion 6b of the mouth neck portion 6, and the first hinge is viewed from above. Since the portion 24, the second hinge portion 38, and the operation arm 40 are formed so as to fit within the contour of the lower half portion 6a, the spout 10 can be assembled to the mouth neck portion 6 so as not to be bulky.

It is a side view which shows the main part of the container with a spout which concerns on 1st Embodiment of this invention in the cross section. It is a side view of the main part of the container of FIG. It is a front view of the main part of the container of FIG. It is a front view of the main part of the container of FIG. 1 in a state where the operation arm is raised. It is sectional drawing seen from the side of the spout of the container of FIG. FIG. 5 is a cross-sectional view of the unfolded state of the spout of FIG. It is an operation explanatory view of the container of FIG. 1, the figure (A) is the state which pulled out the operation arm slightly forward, FIG. (B) is the state which pulled up the operation arm, and FIG. The state in which the plug lid is slightly pulled up via the arm is shown, and the state in which the plug lid is inverted is shown in FIG.

1 to 7 show a container with a spout according to the first embodiment of the present invention. This container is formed of a container body 2, a spout 10, and a cap 50. Each of these members can be formed of, for example, a synthetic resin material.

The container body 2 stands up at the mouth and neck 6 from the body 4 via the shoulder 5. An annular step portion 5a is formed on the upper surface of the illustrated shoulder portion 5. Further, in the illustrated example, the lower half portion 6a of the mouth neck portion 6 has a larger outer diameter portion than the upper half portion 6b of the mouth neck portion 6. A screw portion 7A is formed on the outer surface of the lower half portion 6a of the mouth neck portion 6, and a downward step portion 7B is provided on the outer surface of the upper half portion 6b.

The spout 10 is a member for closing the mouth and neck 6, and is formed of a plug main body 12, a plug lid 26, and an operation arm 40. The spout 10 is preferably formed as an integrally molded product, but those that do not are not excluded from the technical scope of the present invention.

The plug body 12 has an annular top plate 14 having an opening 16 in the center, and the plug peripheral wall 18 is hung from the outer peripheral portion of the top plate 14, and the first seal cylinder 20 is hung from the inner peripheral portion of the top plate 14. It is set up.
The rear portion of the top plate 14 is integrally connected to the rear portion of the plug lid 26 described later via the first hinge portion 24. Here, in the present specification, in order to show the relative positional relationship between the members, the right side of FIG. 1 is referred to as “rear” and the left side of FIG. 1 is referred to as “front”, and the directions orthogonal to these are defined. Is referred to as "right" or "left".
In the illustrated example, an engaging rib 16a that bites into the plug cylinder 32, which will be described later, is provided on the inner peripheral surface of the opening 16. Further, as shown in FIG. 5, an annular pressure welding rib 15 is provided around the lower surface of the top plate 14, and is pressure-welded to the upper end surface of the mouth neck 6. However, these structures can be changed as appropriate.
The plug peripheral wall 18 is fitted to the outer surface of the upper half portion 6b of the mouth neck portion 6, and the lateral contact rib 19 attached to the inner surface of the plug peripheral wall 18 is locked to the downward step portion 7B. I'm letting you. An engaging convex portion a2 is attached to a portion of the outer surface of the plug peripheral wall 18 facing the operation arm 40 described later (in the illustrated example, the front surface of the plug peripheral wall 18). In a preferred illustrated example, the engaging convex portion a2 is attached near the upper end of the plug peripheral wall 18, but the arrangement thereof can be changed as appropriate.
The first seal cylinder 20 is liquid-tightly fitted to the inner surface of the upper half portion 6b of the mouth neck portion 6.
Further, the second seal cylinder 22 stands up from an appropriate position on the upper surface of the top plate 14 (a portion from the opening in the illustrated example).

The stopper lid 26 is a member for covering the upper surface of the top plate 14, and in the present embodiment, the lid plate 28 has an outer peripheral portion placed on the upper surface of the top plate 14, and is opened in the central portion of the lid plate. It is provided with a pouring cylinder 31 that stands up from the mouth edge of the pouring outlet 30. However, the dispenser cylinder 31 may be omitted.
As shown in FIG. 2, the illustrated lid plate 28 is formed by raising the upper plate portion 28b from the inside of the upper surface of the lower plate portion 28a, and the upper surface of the outer peripheral portion of the lower plate portion 28a is formed on the stepped surface 29. The rear rear surface of the lower plate portion 28a is connected to the rear portion of the top plate 14 via the first hinge portion 24. A plug tube 32 surrounding the injection port 30 hangs down from the lower surface of the lid plate 28, and is liquid-tightly fitted to the inner peripheral edge of the opening 16 of the top plate 14.
Further, a seal groove 34 is provided around the back surface of the lid plate 28 so as to surround the stopper cylinder 32, and the second seal cylinder 22 is tightly fitted in the seal groove 34. However, these structures can be omitted.
The engaging piece 36 protrudes laterally (forward in the illustrated example) from a portion of the outer peripheral portion of the lid plate 28 that is located above the operation arm 40 (the front portion of the upper plate 28b in the illustrated example).
The lower surface of the engaging piece 36 has a role as an engaging receiving surface 36a that comes into contact with the base end E1 of the operation arm 40 described later, and in the illustrated example, as shown in FIG. 4, the lower surface is viewed from the protruding direction thereof. Is formed in an arc shape that dents upward.
Further, a second hinge portion 38 for connecting the lid plate 28 to the operation arm 40 described later is provided on the side surface of the lid plate 28 in close proximity to the engaging piece 36. In a preferred illustrated example, as shown in FIG. 3, a pair of left and right second hinge portions 38 are provided on the front surface of the lower plate portion 28a so as to be located on the left and right sides of the engaging piece 36.

The operation arm 40 is provided between the plug main body 12 and the plug lid 26, and has a role of linking the plug lid 26 to the plug main body 12 in a locked state described later. As shown in FIG. 1, the operation arm 40 is preferably provided on the side opposite to the first hinge portion 24, that is, on the front side of the spout 10.
The operation arm 40, the second hinge portion 38 and the first hinge portion 24 described later are formed so as to fit within the contour of the lower half portion 6a, which is the large outer diameter portion of the mouth neck portion 6 when viewed from above. Has been done.
In the present embodiment, the operation arm 40 projects downward from the plug lid 26 via the second hinge portion 38. In the present embodiment, an engaging recess a1 is formed in a part of the operating arm in the protruding direction, and the above-mentioned engaging convex portion a2 is fitted in the engaging recess a1. The engaging concave portion a1 and the engaging convex portion a2 form a locking means A for locking the plug lid to the closing position.
For example, as shown in FIG. 3, the engaging recess a1 is a horizontally long hole (through hole), and the engaging convex portion a2 is formed in a horizontally long rib. However, the shapes of the engaging concave portion a1 and the engaging convex portion a2 may be appropriately changed as long as the locked state can be maintained, and may not be a horizontally long hole or a horizontally long rib. Further, the engaging recess a1 may be a horizontal hole formed on the rear surface (the surface facing the plug peripheral wall) of the operation arm 40 in the state of FIG. 1 instead of the through hole. In the illustrated example, the operation arm 40 is provided with the engaging concave portion a1 and the plug peripheral wall 18 is provided with the engaging convex portion a2, but the operating arm 40 is provided with the engaging convex portion a2 and the plug peripheral wall 18 is provided with the engaging concave portion a1. It may be provided.
In the present embodiment, the operation arm 40 is formed in the shape of a vertical plate along the front surface of the plug peripheral wall 18, and as shown in FIG. 3, a pair of left and right widthwise side portions 40a and one width direction when viewed from the front. It is formed by an intermediate portion 40b.
The upper end (base end E1) side of both side portions 40b in the width direction is continuous with the pair of left and right second hinge portions 38, respectively. Both side portions 40a in the width direction have a flat plate shape, and as shown in FIG. 2, a contact convex portion 41 that abuts on the front surface of the plug peripheral wall 18 in a vertical state is attached to the upper back side of the flat plate. The contact convex portion 41 is not formed on the remaining portion of the flat plate, which makes it easier to grip the grip portion 42 on the lower end (tip E2) side of the operation arm.
In the state shown in FIG. 3, the upper end portion of the width direction intermediate portion 40b is a pressure contact end portion 43 for pressing contact with the engaging piece 36 described above, and is formed lower than the upper ends of both side portions 40a in the width direction in the illustrated example. ing.
As shown in FIG. 3, the front surface and the rear surface of the width direction intermediate portion 40b are formed in an arc surface when viewed from the longitudinal direction of the operation arm 40. The front surface of the intermediate portion 40b in the width direction is fitted with the engaging receiving surface 36a of the engaging piece 36 in a state where the operating arm 40 extends forward from the second hinge portion 38 as shown in FIG. The rear surface of the widthwise intermediate portion 40b is formed so as to fit the front surface of the plug peripheral wall 18 in a state where the operation arm 40 extends downward from the second hinge portion 38.

The cap 50 extends from the upper end of the cap peripheral wall 52 to the cap top wall 54, and the lower portion of the cap peripheral wall 52 is screwed into the lower half portion 6a of the mouth neck portion 6.
A large inner diameter portion 52a is provided around the lower end portion of the cap peripheral wall 52, and surrounds the annular step portion 5a.
A push-down cylinder portion 56 hangs down from the lower surface peripheral portion of the cap top wall 54, and by pushing down the lid plate 28 at the lower end thereof, the mouth neck portion 6 located below the push-down cylinder portion 56. The upper end surface and the lower surface of the top plate 14, and the upper surface of the top plate 14 and the lower surface of the lid plate 28 are in close contact with each other.
From the central portion of the cap top wall 54, a protrusion 60 and a fitting cylinder portion 58 surrounding the protrusion are projected downward, and the fitting cylinder portion 58 is fitted in the dispensing cylinder 31.

In the above configuration, when performing a normal discharge operation, the cap 50 shown in FIG. 1 may be removed, the container body 2 may be turned upside down, and the contents may be poured out from the spout 30.
When the contents are running low and the refilling work is performed, the grip portion 42 at the lower end of the operation arm 40 shown in FIG. 1 is picked and moved forward from the state where the cap 50 is removed. As a result, as shown in FIG. 7A, the operation arm 40 rotates around the second hinge portion 38, and the engaging convex portion a2 is disengaged from the engaging recess a1. Is unlocked.
Further, when the operation arm 40 is rotated so as to move upward and forward with respect to the first hinge portion 24, the intermediate portion 40b in the width direction abuts on the engaging piece 36 at the base end E1 of the operation arm 40 (FIG. 7B). (See), and when the operation arm 40 is further pulled up, the stopper lid 26 and the operation arm 40 act as a lever with the first hinge portion 24 as a fulcrum, and the knob portion 42 is used as a force point, the opening 16 and the stopper cylinder 32 are fitted. The plug cylinder 32 can be easily pulled out from the opening 16 by the action of the lever having the point as the point of action (see FIG. 7 (C)).
Further, when the stopper lid 26 and the operation arm 40 are inverted rearward from the first hinge portion 24, the opening 16 is fully opened.
In this state, a new content for refilling may be injected into the container body 2 through the opening 16.
In addition to the case of refilling the contents, when it is desired to discharge a large amount of contents at one time, the stopper lid 26 may be opened and the contents may be discharged from the opening 16 in the same procedure.

2 ... Container body 4 ... Body 5 ... Shoulder 5a ... Circular step
6 ... Mouth neck 6a ... Lower half 6b ... Upper half 7A ... Screw part 7B ... Downward step 10 ... Mouth plug 12 ... Plug body 14 ... Top plate 15 ... Pressure welding rib 16 ... Opening 16a ... Engagement rib 18 ... Plug peripheral wall 19 ... Contact rib 20 ... 1st seal cylinder 22 ... 2nd seal cylinder 24 ... 1st hinge part 26 ... Plug lid 28 ... Lid plate 28a ... Lower plate part 28b ... Upper plate part 29 ... Step surface 30 ... Discharge outlet 31 ... Discharge cylinder 32 ... Plug cylinder 34 ... Seal groove 36 ... Engagement piece 36a ... Engagement receiving surface 38 ... Second hinge part 40 ... Operation arm 40a ... Width direction both sides 40b ... Width direction intermediate part 41 ... Contact convex part 42 ... Knob part 43 ... Pressure welding end
50 ... Cap 52 ... Cap peripheral wall 52a ... Large inner diameter part 54 ... Cap top wall 56 ... Push-down cylinder part 58 ... Fitting cylinder part 60 ... Protrusion part A ... Locking means a1 ... Engagement recess a2 ... Engagement convex part E1 ... Base end E2 ... Tip

Claims (3)

A stopper body (12) for fitting the container to the mouth and neck, which is formed by hanging the stopper peripheral wall (18) from the outer periphery of the top plate (14) having the opening (16).
The top surface of the top plate (14) is hinged to the upper part of the outer circumference of the plug body (12) via a first hinge portion (24) so as to cover the upper surface of the top plate (14) so as to be openable and closable. A stopper lid (26) having a spout (30) having a diameter smaller than that of the opening (16), which communicates with the opening (16).
An operation arm (40) formed between the plug lid (26) and the plug peripheral wall (18) at a place other than the connecting portion by the first hinge portion (24).
With
The operation arm (40) is provided from the outer peripheral portion of the plug lid (26) via the second hinge portion (38) between the lower side and the lateral side centering on the second hinge portion (38). It protrudes downward so that it can rotate.
An engaging recess (a1) can be fitted in one of a part of the operating arm (40) in the protruding direction and a corresponding portion of the plug peripheral wall (18), and the other can be fitted in the engaging recess (a1). Locking means (a2) for locking the plug lid (26) to the closed position by providing the engaging convex portions (a2) and fitting the engaging convex portions (a2) into the engaging concave portions (a1). Form A)
By rotating the operation arm (40) outward from the side, the engaging convex portion (a2) is disengaged from the engaging concave portion (a1), and the locked state of the plug lid (26) is released. Provided in
The first hinge portion (24) is arranged on one side of the stopper peripheral wall (18) of the stopper body (12) in the tubular radial direction, and the second hinge portion (38) is arranged on the other side. In the locked state of 26), a knob portion (42) is formed on the tip end (E2) side, which is the lower end of the operation arm (40).
The engaging piece (36) is projected outward from the outer peripheral portion of the plug lid (26) so as to be located above the second hinge portion (38), and the operation arm (40) is moved downward. By pulling it up from the extending position to the laterally extending position and then rotating it further upward, the base end (E1) side of the operation arm (40) comes into contact with the engaging piece (36), and the plug lid (26) Is pulled up and formed so that the lid can be opened,
The operation arm (40) is formed as a plate material substantially along the outer surface of the plug peripheral wall (18), and both sides of the widthwise intermediate portion (40b) and the widthwise intermediate portion (40b) of the plate material. Includes both sides (40a) in the width direction located in
Both side portions (40a) of the plate material in the width direction are connected to the plug lid (26) via a pair of second hinge portions (38), and the plate material is connected to the stopper lid (26).
The plug lid (26) has a plug tube (32) fitted in the opening (16).
By rotating the operation arm (40), the pressure welding end portion (43) formed on the base end side of the widthwise intermediate portion (40b) is formed so as to be pressure-welded to the engaging piece (36). A mouth plug that is characterized by that. The stopper body (12), the stopper lid (26), and the operation arm (40) are integrally molded via the first hinge portion (24) and the second hinge portion (38). The mouth plug according to claim 1. A container body (2) that stands up from the torso (4) to the mouth and neck (6),
The spout (10) according to claim 1 or 2 , wherein the plug peripheral wall (18) is fitted to the upper half (6b) of the mouth neck (6).
The lower half (6a) of the mouth and neck (6) has a larger outer diameter than the upper half (6b) of the mouth and neck (6), and the first hinge (24) is viewed from above. ), The second hinge portion (38) and the operation arm (40) are formed so as to fit within the contour of the lower half portion (6a).

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