JP2009234605A - Spouting inner plug - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a spouting inner plug capable of smoothly returning liquid content remaining in the spouting inner plug into a container, and preventing an inner peripheral surface from being stained with the remaining liquid content. <P>SOLUTION: The spouting inner plug 3 attached to a neck part of the container includes a side wall part 31 of an approximately cylindrical shape, a center wall part, a connection part 35 for connecting a lower end of the side wall part 31 to an outer peripheral end of the center wall part 34, and a plurality of spouting openings 36 formed between the connection parts. Ridge parts 40 extending radially from a center part of the center wall part 34 to the side wall part 31 via the plurality of connection parts 35 are formed in the center wall part 34 and the connection parts 35. Valley parts which are held between the ridge parts and extend to the end of the spouting opening 36 are formed in the center wall part 34. Peripherally inclined faces 42 directed downward to the spouting opening 36 and the valley parts are formed on both side parts of the ridge parts 40. Radially inclined faces 41 directed downward from the center part of the center wall part 34 to the end of the spouting opening 36 are formed in the valley parts. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an inside plug for pouring that is attached to the inside of the mouth and neck of a container and can easily return the content liquid from the pouring opening after pouring out the content liquid in the container. .

Some containers have a dispensing stopper attached to the mouth and neck of the container. In such a container, by removing the cap, the content liquid flows out to the object through the dispensing opening formed at the bottom of the dispensing plug. A container equipped with such an inside stopper for pouring can be used frequently because the content liquid can flow out through the pouring opening.
According to the technique of the following Patent Document 1, the inner stopper for pouring has a fitting cylinder that fits into the mouth and neck of the container, and a substantially cylindrical shape that is provided above the fitting cylinder and serves as a spout for the content liquid. A pouring tube and a flat bottom portion (partition wall) disposed in the horizontal direction at the bottom of the pouring tube are provided. The bottom part is provided with a removal part in which a cutting groove whose periphery is a thin part is provided. By removing the pulling ring attached to the removal part, an extraction opening (extraction hole) is formed, and the inside of the container Can be discharged from the pouring hole. The opening shape of the extraction hole is a rounded rhombus, and is formed at the center of the circular bottom.

According to the technique of the following Patent Document 2, the inner stopper for pouring has a substantially bottomed cylindrical shape, and a flange-shaped mounting portion that is engaged with the upper end portion of the mouth / neck portion of the container is provided outside the upper edge portion. And a spout for the content liquid in the container is formed inside. In the bottom portion of the pouring inner plug, there are a plurality of pouring openings (pouring holes) extending in the circumferential direction from the lower portion of the peripheral wall of the pouring inner plug (three at 120 degree intervals). ) Is formed.
The bottom portion of the dispensing inner plug has a plate shape and is formed so that the central portion protrudes in a substantially conical shape and gradually decreases from the central portion toward the lower peripheral wall of the dispensing inner plug.
JP 2000-203619 A Japanese Patent Laid-Open No. 10-175658

When the container disclosed in Patent Document 1 allows the content liquid to flow out of the container, the container is tilted to pour out, but if the container is put into an upright (stand-up) posture after the content liquid has flowed out, The content liquid that has once flowed out of the outlet hole and into the outlet cylinder (hereinafter referred to as the inner lid) is returned from the inner lid to the container through the outlet hole.
However, since the shape of the bottom part described in Patent Document 1 is a plane extending in the horizontal direction, the content liquid remains on the plane, and the remaining content liquid is dried and solidified.
In the inner plug disclosed in Patent Document 2, a surface that descends downward is formed from the center portion of the bottom portion to the peripheral wall portion that is located on the outer peripheral portion of the bottom portion, and the contents are directed to the dispensing opening side that is located on the peripheral wall portion side of the bottom portion. The liquid is allowed to flow down.

  The inside plug for pouring of patent document 2 which is this cup shape has a corner formed in a linear shape at the connecting portion between the lower portion and the bottom portion of the peripheral wall, and when the peripheral wall is vertical, the bottom portion is on the peripheral wall side. Since it is inclined low, the angle is narrow and acute. Thus, when there is an acute angle at the joint portion between the peripheral wall and the bottom, the content liquid tends to enter and remain in the acute angle portion due to the property that water enters the narrow space, and then the content liquid solidifies. Increasing the angle of inclination at the bottom of the liquid in order to allow the liquid to flow smoothly from the center to the outside, the corners of the connecting part become narrower. . Further, when the solidified residue accumulates in the corners, the residue absorbs the content liquid, and the solidified product gradually grows every time the container is used. Thus, when the content liquid is solidified, the appearance is also deteriorated, which is uncomfortable for the user and unfavorable for hygiene.

  The present invention has been made in view of such circumstances, and the content liquid that has once flowed out of the container through the dispensing opening can be smoothly returned from the dispensing opening into the container. Another object of the present invention is to provide a pouring inner stopper capable of preventing or suppressing contamination due to residual content liquid at the bottom.

In order to solve the above-described problem, the dispensing inner plug of the present invention connects a substantially cylindrical side wall portion, a central wall portion, a lower end of the side wall portion, and an outer peripheral end of the central wall portion. In the middle plug for pouring formed with a plurality of connecting portions, a lower end of the side wall portion, an outer peripheral end of the central wall portion and a plurality of pouring openings provided between the connecting portions, the central wall Forming a ridge line portion extending radially from a central portion of the central wall portion to a peripheral portion of the side wall portion or the connecting portion through a central portion in the circumferential direction of the plurality of connecting portions. A wall portion is formed between the ridge line portions to form a valley portion extending from the central portion to the extraction opening end, and gradually toward the extraction opening and the valley portion on both sides of the ridge line portion. Forming a gentle circumferential sloping surface going downward, the valley is the central part of the central wall It was set to become gradually from the radial inclined plane downward until al the dispensing opening end.
The connecting portion of the dispensing inner plug gradually moves downward from the lower portion of the side wall portion to the central wall portion side from a part of the ridge line portion, a part of the circumferentially inclined surface. It is preferably formed by a gentle curved surface.
The radially inclined surface of the dispensing plug is surrounded by the circumferentially inclined surface and the dispensing opening, and the dispensing opening on the central wall side with the central point of the central wall portion as a vertex. It is preferable that the inclined surface is formed in a triangular shape with two sides extending to the end.
The ridge line portion of the dispensing plug may extend horizontally from the central portion of the central wall portion to the side wall portion.

The dispensing inner plug of the present invention includes a side wall portion having a substantially cylindrical shape, a central wall portion, a plurality of connecting portions that connect a lower end of the side wall portion and an outer peripheral end of the central wall portion, and the side wall portion. A pouring inner plug in which a plurality of pouring openings provided between the lower end of the central wall portion, the outer peripheral end of the central wall portion and the connecting portion are formed, and the central wall portion and the connecting portion include the center A ridge line portion extending radially from the central portion of the wall portion to the side wall portion or the outer peripheral portion of the connection portion through the central portion in the circumferential direction of the plurality of connection portions is formed, and the center wall portion is sandwiched between the ridge line portions. A trough extending from the central portion to the end of the pouring opening is formed, and on both sides of the ridge line portion, the pouring opening and a gentle circumferential inclined surface that gradually goes downward toward the trough. Forming the valley portion gradually downward from the central portion of the central wall portion to the opening end for pouring. Since it is made of a radially inclined surface, when the container is tilted and the content liquid is poured into the target object and the container is brought into an upright state, the content liquid is returned to the inside of the container from the dispensing opening. However, since both the circumferentially inclined surface and the radially inclined surface are inclined toward the dispensing opening, the content liquid can be efficiently returned into the container without collecting in the dispensing plug.
The connecting part of the dispensing inner plug of the present invention includes a part of the ridge line part, a part of the circumferentially inclined surface, and a gradually lower part from the lower part of the upper side wall part toward the central wall part side. Therefore, the content liquid can be returned more efficiently into the container by the curved surface.

Hereinafter, an extraction stopper according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a half cross-sectional half side view in which a dispensing stopper 3 according to the present invention is applied to a container 2 together with a container lid 1.
The container lid 1 is made of, for example, a synthetic resin such as polyethylene or polypropylene, and has a disk-shaped top surface wall 5 and a substantially cylindrical skirt wall 6 that hangs down from the periphery of the top surface wall 5. The top wall 5 of the container lid 1 extends substantially horizontally as a whole, and a large number of grooves 16a extending in the vertical direction are formed on the outer surface of the peripheral wall portion 16 of the skirt wall 6 in the entire circumferential direction.
A weakening line 7 extending in the circumferential direction is formed at a lower portion of the peripheral wall portion 16 of the skirt wall 6, and a tamper evidence skirt portion 10 is provided below the weakening line 7. The skirt wall 6 includes the tamper evidence skirt 10, and the peripheral wall 16 does not include the tamper evidence skirt 10.

On the inner peripheral surface of the peripheral wall portion 16 of the container lid 1, a female screw 21 that is screwed with the male screw 22 of the container 2 is formed. On the other hand, the synthetic resin-made or glass-made container 2 has the mouth-and-neck portion 17 formed above, and the male screw 22 described above is formed on the outer peripheral portion of the mouth-and-neck portion 17.
The circumferential direction weakening line 7 is composed of slits 12 formed at intervals in the circumferential direction and a plurality of bridging portions 14 existing between the slits 12. In addition, a plurality of locking protrusions 11 are formed on the inner peripheral surface of the tamper evidence skirt 10 so as to protrude obliquely upward inward in the radial direction of the container lid 1.

On the outer peripheral surface of the container 2, a locking jaw portion 23 that protrudes in an annular shape toward the outer peripheral side of the container 2 is formed at a slight distance to the lower side of the male screw 22. The portion 23 is arranged to be engageable. The bridging portion 14 connects the peripheral wall portion 16 and the tamper evidence skirt portion 10 so that they can be broken in the vertical direction, thereby facilitating breakage when the container lid 1 is opened. The locking projection 11 plays a role of preventing the tamper evidence skirt 10 from coming off the locking jaw 23 after opening.
An annular neck ring 24 protruding outward in the radial direction of the container 2 is formed at the lower part of the locking jaw 23 of the container 2.

2 is a perspective view of the inner plug 3 for pouring, FIG. 3 is a plan view of the inner plug 3 for pouring, FIG. 4 is a bottom view of the inner plug 3 for pouring, and FIG. 6 is a cross-sectional view of the portion rotated 90 degrees from the position of FIG. 5 (in the YY line direction), and FIG. 7 is a Z-in FIG. FIG. 8 is a sectional view in the WW line direction of FIG. 3.
On the mouth-and-neck portion 17 of the container 2, an inside plug 3 for dispensing is attached. The dispensing inner plug 3 includes a substantially pan-shaped side wall portion 31 that is substantially cylindrical, a circular bottom portion 32, and a flange portion 33 that is positioned above the side wall portion 31.

  The flange portion 33 is formed so as to project annularly from the upper portion of the side wall portion 31 to the radially outer side of the dispensing plug 3. The lower surface 33a of the flange portion 33 extends in the horizontal direction, and the area where the annular lower surface 33a is present is equal to the area where the upper end of the mouth-neck portion 17 of the container 2 is present. In this state, the lower surface 33a is placed in a state of being placed on the upper end portion of the mouth / neck portion 17. On the upper surface side of the flange portion 33, the cross section is curved in an arc shape. On the other hand, the container lid 1 is formed with an annular seal 5 a that protrudes downward in an annular shape on the inner surface of the top wall 5. In the annular seal 5a, the outer peripheral surface of the tip abuts on the inner peripheral surface of the flange portion 33 and serves as a seal portion. On the outer side of the annular seal 5a, an annular convex portion 5b is formed projecting downward with a space from the annular seal 5a. The annular convex portion 5b abuts on the upper surface of the flange portion 33, serves as a seal portion, and prevents excessive tightening when the container lid 1 is screwed to the container.

A central wall 34 is formed at the center of the bottom 32 of the dispensing plug 3. Between the outer peripheral part of the central wall part 34 and the lower part of the side wall part 31, the some connection part 35 which couple | bonds the central wall part 34 and the side wall part 31 is formed. In the present embodiment, the connecting portions 35 are formed at six locations and are arranged at intervals of 60 degrees toward the circumferential direction of the bottom portion 32. All of the plurality of connecting portions 35 have the same shape.
A dispensing opening 36 is formed between the connecting portions 35. The dispensing opening 36 has a substantially rectangular shape extending radially from the central axis of the bottom portion 32 when viewed in a plan view, and is slightly narrowed toward the central side in the present embodiment. It is formed as follows. However, the shape of the dispensing opening 36 may be a shape that becomes wider toward the center side, and there is no particular limitation. However, the content liquid appropriately flows from the inside of the container 2 to the dispensing plug 3. However, it is necessary to form the size so that it can flow in.

As shown in FIG. 3, the circular central wall 34 as viewed in plan forms a ridge line 40 extending radially in six directions from the center point of the central wall 34 toward the horizontal direction (see FIG. 6). is doing. In this embodiment, the ridge line 40 extends from the center point to the outer peripheral portion (or the side wall portion 31) of the connecting portion 35 beyond the central wall portion 34 at intervals of 60 degrees in the circumferential direction. Each ridge line 40 is formed so as to pass through the center portion (center line) in the circumferential direction of the connecting portion 35, that is, the center line between the adjacent extraction openings 36.
In the valley portion between the ridge lines 40 of the central wall portion 34, there is a radial inclined surface 41 that gently slopes downward from the central portion of the central wall portion 34 toward the central wall portion 34 side end portion of the dispensing opening 36. Is formed. The radially inclined surface 41 has an isosceles triangle shape with its central portion at the apex and extending toward the dispensing opening 36, and extends so as to pass through the central portion between the ridge lines 40.

The left and right side portions of each ridge line 40 are formed with circumferentially inclined surfaces 42 that are gently inclined downward from the ridgeline 40 toward the circumferential side. The circumferentially inclined surface 42 is formed across the central wall portion 34 and the connecting portion 35. In the central wall portion 34, the circumferentially inclined surface 41 is inclined downward from the ridgeline 40 toward the radially inclined surface 41. To join. Further, the connecting portion 35 of the circumferentially inclined surface 42 is inclined downward from the ridge line 40 toward the extraction opening 36.
At the boundary portion between the lower end portion and the bottom portion 32 of the side wall portion 31, curved surfaces 43 that gently curve toward the central wall portion 34 side are formed on both the left and right sides of the ridge line 40. The curved surface 43 has one circumferential side facing the extraction opening 36 and the other lateral surface joined to the circumferential inclined surface 42.
As described above, the bottom wall 32 of the dispensing inner plug 3 includes the radial inclined surface 41, the circumferential inclined surface 42, and the curved surface 43 at the central wall portion 34 and the connecting portion 35. The joint angles at which the radial inclined surface 41, the circumferential inclined surface 42, and the curved surface 43 are joined to each other are formed so that all the angles are obtuse.

The outer peripheral surface of the side wall portion 31 is formed to have substantially the same diameter as the inner peripheral surface of the mouth-and-neck portion 17 of the container 2, and the side wall portion 31 and the mouth-and-neck portion in a state where the inner plug 3 for dispensing is attached to the container 2. Both 17 are mounted in close contact.
Longitudinal ribs 37 are formed on the inner circumferential lower side of the side wall portion 31 and the outer peripheral portion of the bottom portion 32. As shown in FIG. 1, the vertical rib 37 forms a gap with respect to the inner peripheral surface of the mouth-and-neck portion 17 of the container 2, is formed in the circumferential direction along the inner peripheral surface, and the tip portion extends downward. . The leading end of the vertical rib 37 is formed to extend to a position equivalent to the lowermost end of the bottom 32 or a position slightly projecting below it, for example, when transporting the pouring spigot 3 to the container. Is preferable in terms of stable supply. The positions where the vertical ribs 37 are formed are formed in the circumferential direction at the positions where the respective connecting portions 35 are located excluding the dispensing opening 36. Both side surfaces 37 a on the outer circumferential direction side of each vertical rib 37 are formed flush with the side surface of the dispensing opening 36.

When the container lid 1 is wrapped around the container 2, the dispensing stopper 3 is attached to the container 2 in advance. The inner plug 3 for pouring is brought into close contact with the mouth and neck portion 17 by the elastic force of the side wall portion 31 of the inner plug 3 for pouring made of synthetic resin, and the lower surface 33a of the flange portion 33 is formed at the upper end of the mouth and neck portion 17. It abuts and prevents further penetration of the dispensing stopper 3 into the container 2 and serves as a stopper. The container lid 1 is wrapped around the mouth / neck portion 17 after the dispensing stopper 3 is attached. At this time, the locking projection 11 shown in FIG. 1 is deformed outward, gets over the male screw 22 and the locking jaw 23, and is restored inward and upward again. It is located below the locking jaw 23, can be engaged with the locking jaw 23, and plays a role of preventing the tamper evidence skirt 10 from coming off.
In the present embodiment, the boundary region of the bottom portion 32 of the dispensing plug 3 is not clearly shown, but the bottom portion 32 includes the entire central wall portion 34, and the connection portion 35 and the dispensing opening 36 are described. , May include all or some of them.

Next, the operation of this embodiment will be described.
When such a container lid 1 is opened by a user, the container 2 is grasped with one hand, and the container main body (portion above the tamper evidence skirt 10) 8 of the container lid 1 is grasped with the fingertip of the other hand. Then, the container lid 1 is opened. When the peripheral wall portion 16 of the skirt wall 6 is rotated, the entire container lid 1 tends to move upward by the action of the screws 21 and 22, but the locking protrusion 11 of the tamper evidence skirt 10 is shown in FIG. It abuts on the locking jaw portion 23 shown, and the rise of the tamper evidence skirt portion 10 is prevented. Thus, in the container lid 1, only the portion of the container lid main body 8 moves upward, the bridging part 14 of the weakening line 7 is cut, and the container main body 8 and the tamper evidence skirt 10 are separated. Then, the tamper evidence skirt 10 is left on the container 2 side, and the container lid 1 can be detached from the mouth / neck part 17.

  When the content liquid is poured out from the container 2, the container 2 is tilted with the container lid 1 removed. As the container 2 tilts, the content liquid flows out through the pouring opening 36 of the pouring inner plug 3. At this time, the dispensing opening 36 is formed in a size according to various conditions such as the viscosity of the content liquid, and thereby flows out from the dispensing opening 36 in an appropriate amount. The content liquid that has flowed into the inside of the pouring inner plug 3 from the pouring opening 36 flows through the inner peripheral surface of the side wall portion 31 of the pouring inner plug 3, and the flange portion 33 serves as an outlet and is poured into the object. It is.

After the supply of the content liquid to the target object is completed, the container 2 is placed in an arbitrary place with the container 2 in an upright state. At this time, the bottom portion 32 of the dispensing inner plug 3 is in the lower position, and the residual content liquid that has not been discharged to the outside with the content liquid flowing into the interior is returned from the dispensing inner plug 3 to the inside of the container 2. be able to.
Specifically, a part of the residual content liquid left inside the pouring inner stopper 3 in a state where the container 2 is tilted is poured out from the side wall portion 31 by bringing the container 2 into an upright state. The remaining residual liquid is returned directly to the opening 36 and returned from the side wall portion 31 to the connecting portion 35.

  The residual content liquid returned to the connecting portion 35 flows to the circumferentially inclined surfaces 42 provided on both sides of the ridge 40 formed in the connecting portion 35. In this circumferentially inclined surface 42, since the circumferentially inclined surface 42 gradually decreases toward the dispensing opening 36, a part of the residual content liquid flows from the circumferentially inclined surface 42 to the dispensing opening 36. Then, it flows down into the container 2. Further, a part of the residual content liquid flows from the circumferential inclined surface 42 on the connecting portion 35 side to the circumferential inclined surface 42 located on the central wall portion 34 side. The residual liquid that has flowed to the circumferentially inclined surface 42 on the central wall 34 side flows to the radially inclined surface 41 located on the lower side. Since the radial inclined surface 41 is gradually lowered toward the dispensing opening 36, the residual content liquid flows into the dispensing opening 36 and flows down into the container 2.

The residual liquid remaining on the central wall portion 34 from the beginning flows from the circumferentially inclined surface 42 to the radially inclined surface 41, flows down into the container 2 from the dispensing opening 36, and from the beginning, the radially inclined surface 41. The residual liquid remaining in the liquid flows as it is through the radially inclined surface 41 toward the radial dispensing opening 36 and flows down into the container 2. Further, the residual content liquid remaining on the curved surface 43 flows down directly from the dispensing opening 36 located on the side surface thereof, or once flows into the adjacent circumferentially inclined surface 42 and is discharged from the circumferentially inclined surface 42. It flows down from the opening 36 to the inside of the container 2.
The flow of the content liquid is complicated, and may flow from the other route to the pouring opening 36, but from the radially inclined surface 41, the circumferential inclined surface 42, and the curved surface 43 through the pouring opening 36, the container 2 flows down into the interior.
In the dispensing opening 36, vertical ribs 37 are formed in the lower part of the container lid 1, so that the residual content liquid flowing down from the side surface of the dispensing opening 36 can efficiently travel along the side surface 37 a of the vertical rib 37. Can flow down.

Further, unlike the conventional case, there is no acute angle portion like the joint portion between the side wall portion 31 extending in the vertical direction and the bottom portion extending in the horizontal direction, and all the joint angles are formed as obtuse angles. It is possible to prevent the residual content liquid from entering and solidifying the portion and depositing the solidified product on the bottom portion 32.
A vertical rib 37 extending downward was formed at the lower part of the side wall 31 of the dispensing plug 3. This is because the shape of the outer peripheral side of the connecting portion 35 of the dispensing plug 3 is curved (see FIGS. 5 to 8), so that when the dispensing plug 3 is conveyed on the production line in the factory, the support member If it is not supported, it will be easy to roll. Therefore, by forming the vertical ribs 37, it is possible to maintain an upright posture even without a support member, and it is possible to perform high-speed conveyance on the production line.

The present invention has been described based on the embodiments with reference to the accompanying drawings. However, the present invention is not limited to the above-described embodiments, and can be modified or changed without departing from the scope of the present invention. is there.
In the present embodiment, the ridge line 40 formed in the dispensing inner plug 3 is formed in the horizontal direction. However, the ridge line 40 is increased toward the side wall 31 side with the central portion of the central wall portion 34 being raised. You may form as follows.
Moreover, in the said embodiment, although the shape of the radial direction inclined surface 41 was formed in the isosceles triangle shape which used the center wall part 34 as the vertex, it may change to the radial direction inclined surface 41, and may form in a linear form. .

It is the fragmentary sectional view seen from the front direction of the container with a lid | cover with which the inside stopper for extraction by embodiment of this invention is mounted | worn. It is a perspective view of the inside stopper for extraction by embodiment of this invention shown in FIG. It is a top view of the inside stopper for extraction shown in FIG. It is a bottom view of the inside stopper for extraction shown in FIG. FIG. 4 is a partially broken cross-sectional view in which the left side portion of the dispensing plug shown in the XX line direction of FIG. 3 is broken. It is sectional drawing in the YY line direction of FIG. It is sectional drawing in the ZZ line direction of FIG. It is sectional drawing in the WW line direction of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Container lid 2 Container 3 Outlet plug 16 Peripheral wall part 31 Side wall part 32 Bottom part 33 Flange part 34 Central wall part 35 Connection part 36 Opening for extraction 37 Vertical rib 37a Side surface 40 Ridge line 41 Inclination direction of radial direction 42 Circumferential direction inclination Surface 43 Curved surface

Claims (4)

A side wall portion having a substantially cylindrical shape, a central wall portion, a plurality of connecting portions connecting a lower end of the side wall portion and an outer peripheral end of the central wall portion, a lower end of the side wall portion, and an outer peripheral end of the central wall portion And an inside plug for pouring formed with a plurality of pouring openings provided between the connecting portions,
The central wall portion and the connecting portion are formed with ridge lines extending radially from the central portion of the central wall portion to the side wall portion or the outer peripheral portion of the connecting portion through the central portion in the circumferential direction of the plurality of connecting portions. ,
The central wall portion is formed with a trough that is sandwiched between the ridge line portions and extends from the central portion to the end of the extraction opening. Both sides of the ridge line portion face the extraction opening and the trough portion. A gentle circumferentially inclined surface that gradually goes downward is formed, and the valley portion is a radially inclined surface that gradually goes downward from the central portion of the central wall portion to the extraction opening end. Outing tap.   The connecting part is formed by a part of the ridge line part, a part of the circumferentially inclined surface, and a gently curved surface gradually going downward from the lower part of the upper side wall part toward the central wall part side. The inside stopper for pouring according to claim 1 characterized by things.   The radially inclined surface is surrounded by the circumferentially inclined surface and the extraction opening, and the triangle extends from the central point of the central wall portion to the extraction opening end on the central wall portion side. The inside plug for pouring according to claim 1 or 2, wherein it is an inclined surface formed in a shape.   The inside plug for extraction according to claim 1, wherein the ridge line portion extends horizontally from a central portion of the central wall portion to the side wall portion.

Images