JP2020138769A - cap - Google Patents

Abstract

To make it possible to inspect with good efficiency whether a seal cylinder seals a spout hole or not.SOLUTION: A cap 1 comprises: a topped cylindrical cap body 11 which is mounted to a mouth W1 of a container body W; a lid body 13 which opens/closes a top wall part 12 of the cap body; and an inside plug 14 which covers the spout hole 15 from above and seals the same. The lid body is provided with a regulation part 25 which is engaged with a lock part 14a provided on the inside plug when opening the top wall part, and regulates falling of the inside plug from the lid body. A space X defined by an outer peripheral surface of a seal cylinder 29, an inner peripheral surface of an outer cylinder 30, an underside of a connection plate 31, and a top face of the top wall part, and a leak inspection hole 26, which is outside the space and is communicated with an exterior part of the cap body, are formed on the inside plug.SELECTED DRAWING: Figure 1

Description

The present invention relates to a cap.

Conventionally, for example, as shown in Patent Document 1 below, a topped cylinder-shaped cap body attached to the mouth of the container body and a top wall portion of the cap body in which an injection hole for contents is formed. A lid that opens and closes the lid, and an inner plug that is disposed between the top wall and the lid and has a seal tube fitted in the pouring hole. Caps that do not have a possible unplugging section are known.

JP-A-2017-154748

However, the conventional cap has a problem that it cannot be efficiently inspected whether or not the seal cylinder seals the injection hole.

The present invention has been made in consideration of such circumstances, and an object of the present invention is to provide a cap capable of efficiently inspecting whether or not the sealing cylinder seals the injection hole.

In order to solve the above problems and achieve such an object, the cap of the present invention includes a ridged tubular cap body attached to the mouth of the container body and the contents of the cap body. A lid that opens and closes the top wall portion on which the injection hole is formed, and an inner plug that is disposed between the top wall portion and the lid body and covers and seals the injection hole from above. The inner plug is a cap provided, and the inner plug encloses the seal cylinder fitted in the injection hole and the seal cylinder from the outside in the radial direction, and the lower end portion abuts on the upper surface of the top wall portion. Alternatively, a close outer cylinder and a connecting plate connecting the seal cylinder and the outer cylinder are provided, and the lid is locked provided to the inner plug when the top wall portion is opened. A regulating portion that engages with the portion from below the locking portion and regulates the dropping of the inner plug from the lid is provided, and the inner plug has an inner peripheral surface of the outer cylinder, the said. A leak inspection hole is formed that communicates the space defined by the lower surface of the connecting plate and the upper surface of the top wall portion with the outside of this space and the outside of the cap body.

According to the present invention, when the lid is moved upward with respect to the top wall portion, the regulating portion of the lid engages with the locking portion of the inner plug, so that the inner plug is attached to the top wall portion together with the lid body. On the other hand, it moves upward. At this time, the seal cylinder of the inner plug is separated from the injection hole, and the top wall and the injection hole are opened.
Since the inner plug is provided with an outer cylinder whose lower end is in contact with or close to the upper surface of the top wall, the inner plug can be easily assembled to the cap body and before the inner plug is assembled to the cap body. In the state of a single component, it becomes difficult for an external force to be applied to the seal cylinder, deformation of the seal cylinder can be suppressed, and the injection hole can be reliably sealed by the seal cylinder.
Since a leak inspection hole is formed in the inner plug, if the sealing cylinder does not seal the injection hole, air will be released to the cap body when the inside of the cap body is made positive or negative pressure. The unsealed portion in the injection hole, the space, from one of the inside of the space and the outside of the cap body (hereinafter, simply referred to as the outside of the cap body) to the other. And it will flow through the leak inspection hole. As a result, when pressure is applied to the inside of the cap body when the seal cylinder does not seal the injection hole, air is passed through the leak inspection hole, so that the lower end of the outer cylinder is capped. Despite being in contact with or close to the upper surface of the top wall of the main body, air flows smoothly between the space and the outside of the cap main body with little resistance, and the seal cylinder seals the injection hole. It is possible to efficiently inspect whether or not it is done.

Here, the upper surface of the top wall portion includes an annular outer peripheral portion and an annular inner peripheral portion that is located on the inner side in the radial direction with respect to the outer peripheral portion and whose inner side is the injection hole. , The outer peripheral portion and the inner peripheral portion are connected to each other, and a step portion facing outward in the radial direction is provided, and the outer cylinder may be fitted onto the step portion.

In this case, since the outer cylinder of the inner plug is fitted on the stepped portion on the upper surface of the top wall, the inner plug is the cap body even if the positive pressure in the container body is applied to the inner plug through the injection hole. In addition to being able to suppress floating, when assembling the inner plug to the cap body, the relative positions of the inner plug and the cap body are determined, and this assembly can be easily performed.
The outer cylinder is fitted onto the stepped portion of the top wall portion, and it is difficult for the space and the outside of the cap body to communicate with each other through the space between the outer cylinder and the upper surface of the top wall portion. Therefore, the effect of enabling the above-mentioned inspection to be performed efficiently is remarkably achieved.

Further, the inner plug is separated downward from the lower surface of the top wall portion of the lid body, the regulating portion is formed in a tubular shape, and the outer cylinder is arranged in the regulating portion so as to be vertically movable. The force required to move the outer cylinder up and down in the regulation portion may be smaller than the force required to move the seal cylinder up and down in the injection hole.

In this case, since the inner plug is separated downward from the lower surface of the top wall of the lid, it is possible to prevent the external force from being applied to the inner plug even if an unexpected external force is applied to the top wall of the lid. Therefore, the pouring hole can be reliably sealed by the sealing cylinder.
The force required to move the outer cylinder up and down in the regulation section is smaller than the force required to move the seal cylinder up and down in the injection hole. Therefore, in the process of attaching the lid to the cap body after opening the cap, if the lower end of the seal cylinder comes into contact with the inner peripheral surface of the injection hole, the downward movement of the inner plug is suppressed, while the lid is , Continues to move downward and is attached to the cap body. As a result, the fitting depth of the seal cylinder with respect to the injection hole becomes shallower than that in the unopened state of the cap, and the next time the injection hole is opened, the lid body is moved upward with respect to the cap body. The force required for the cap can be reduced as compared with the unopened state of the cap.

Further, the fitting depth of the seal cylinder with respect to the injection hole may be larger than the vertical gap between the inner plug and the lower surface of the top wall portion of the lid.

In this case, the fitting depth of the seal cylinder with respect to the injection hole is larger than the vertical gap between the inner plug and the lower surface of the top wall portion of the lid. Therefore, in the process of attaching the lid to the cap body after opening the cap, as described above, the downward movement of the inner plug is suppressed, while the downward movement of the inner plug is suppressed, while the top of the lid is continuously moved downward. The lower surface of the wall portion abuts on the inner plug, and then the lid and the inner plug move downward as a unit, the seal cylinder enters the injection hole, and the lid is attached to the cap body. At this time, the fitting depth of the seal cylinder with respect to the injection hole is about the vertical gap between the inner plug and the lower surface of the top wall in the unopened state of the cap, as compared with the unopened state of the cap. It becomes shallower, and the force required to move the lid upward with respect to the cap body the next time the injection hole is opened can be reduced compared to the unopened state of the cap, and the seal tube can be opened. It is possible to securely fit in the injection hole, and the injection hole can be reliably sealed by the seal cylinder.

According to the present invention, it is possible to efficiently inspect whether or not the seal cylinder seals the injection hole.

It is a vertical sectional view of the cap shown as the 1st Embodiment which concerns on this invention. It is explanatory drawing explaining the assembly process of the cap shown in FIG. It is a figure which shows the state which attached the lid body to the cap body after opening the cap shown in FIG. It is a vertical sectional view of the cap shown as the 2nd Embodiment which concerns on this invention.

Hereinafter, the cap 1 according to the first embodiment of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 to 3, the cap 1 of the present embodiment opens and closes the eclipsed tubular cap body 11 attached to the mouth portion W1 of the container body W and the top wall portion 12 of the cap body 11. The lid body 13 is provided, and the inner plug 14 arranged between the top wall portion 12 and the lid body 13 is provided.

In the illustrated example, the lid body 13 is formed in a humpback tubular shape, the inner plug 14 is formed in a tubular shape, and the lid body 13, the inner plug 14, and the cap body 11 are arranged coaxially with the common shaft. Has been done. Hereinafter, this common shaft is referred to as a cap shaft O, the top wall portion 35 side of the lid 13 is referred to as an upper side, and the open end side of the peripheral wall portion 36 of the cap body 11 is referred to as a lower side along the cap shaft O. When viewed from the vertical direction, the direction that intersects the cap axis O is called the radial direction, and the direction that orbits around the cap axis O is called the circumferential direction.

The top wall portion 12 is provided with an injection hole 15 for the contents, a fixed cylinder 16 that surrounds the injection hole 15 from the outside in the radial direction, and an inside of the fixing cylinder 16 in the radial direction, and the inside is the injection hole 15. The dispenser cylinder 17 and the like are formed.
The injection hole 15, the fixed cylinder 16, and the injection cylinder 17 are arranged coaxially with the cap shaft O. It is not necessary to form the pouring cylinder 17 on the top wall portion 12.

The injection hole 15 penetrates the top wall portion 12 in the vertical direction. The dispensing cylinder 17 projects upward from the opening peripheral edge of the dispensing hole 15 on the upper surface of the top wall portion 12.
The fixed cylinder 16 projects upward from the outer peripheral edge of the upper surface of the top wall portion 12. The fixed cylinder 16 extends continuously over the entire circumferential direction. The upper end of the fixed cylinder 16 is located below the upper end of the pouring cylinder 17. The fixed cylinder 16 is formed with an outer locking protrusion that protrudes outward in the radial direction.
On the lower surface of the top wall portion 12, a container fitting cylinder 34 extending downward and being fitted in the mouth portion W1 is formed. The container fitting cylinder 34 is arranged coaxially with the cap shaft O. The container fitting cylinder 34 is arranged on a portion of the lower surface of the top wall portion 12 located inside the fixed cylinder 16 in the radial direction.

The lower surface of the top wall portion 12, the outer peripheral surface of the container fitting cylinder 34, and the inner peripheral surface of the peripheral wall portion 36 of the cap main body 11 open downward and extend continuously over the entire circumferential direction, and the cap. An annular groove arranged coaxially with the shaft O is defined. The mouth portion W1 is inserted into this annular groove. The upper end opening edge of the mouth portion W1 comes into contact with the lower surface of the top wall portion 12, and the container fitting cylinder 34 seals the inside of the mouth portion W1. An undercut protrusion that undercuts and fits into the container locking protrusion formed on the outer peripheral surface of the mouth portion W1 is formed on the inner peripheral surface of the peripheral wall portion 36 of the cap body 11.

A seal auxiliary cylinder 22 is arranged inside the injection hole 15. The seal auxiliary cylinder 22 is arranged coaxially with the cap shaft O. The upper end of the seal auxiliary cylinder 22 is located below the upper end of the pouring cylinder 17. The positions of the lower end opening edge of the seal auxiliary cylinder 22 and the opening peripheral edge of the injection hole 15 on the lower surface of the top wall portion 12 in the vertical direction are the same as each other. The radial gap between the outer peripheral surface of the seal auxiliary cylinder 22 and the inner peripheral surface of the injection hole 15 is equal to or less than the thickness of the lower end portion of the seal cylinder 29 described later in the inner plug 14. The lower ends of the outer peripheral surface of the seal auxiliary cylinder 22 and the inner peripheral surface of the injection hole 15 are connected to each other via a plurality of connecting pieces 33 arranged at intervals in the circumferential direction.
A configuration that does not have the seal auxiliary cylinder 22 and the connecting piece 33 may be adopted.

The upper surface of the top wall portion 12 has an annular outer peripheral portion 18 on which the fixed cylinder 16 is formed, and an annular portion whose inside is an injection hole 15 located inside and above the outer peripheral portion 18 in the radial direction. The inner peripheral portion 19 and the outer peripheral portion 18 and the inner peripheral portion 19 are connected to each other, and a step portion 20 facing outward in the radial direction is provided.

A guide wall portion 19a that projects upward is formed in a portion of the outer peripheral edge portion of the inner peripheral portion 19 that is located closest to the hinge portion 21. The upper end of the guide wall 19a is located below the upper end of the dispensing cylinder 17. The size of the guide wall portion 19a in the circumferential direction is smaller than the size of the hinge portion 21 in the circumferential direction. The guide wall portion 19a has a rectangular shape that is long in the circumferential direction when viewed from the outside in the radial direction.

An annular recess 18a is formed on the inner peripheral edge of the outer peripheral portion 18 so as to be coaxial with the cap shaft O and continuously extend over the entire circumferential direction.
The upper end portion of the step portion 20 extends outward in the radial direction as it goes downward. As shown in FIG. 3, a ridge portion 20a is formed in the lower portion of the step portion 20 so as to project outward in the radial direction and continuously extend over the entire circumferential direction. The ridge portion 20a is tightly fitted in the lower end portion of the outer cylinder 30 described later of the inner plug 14 so as to be detachable.

The lid 13 is connected to the peripheral wall portion 36 of the cap body 11 via a hinge portion 21. The lid body 13, the cap body 11, and the hinge portion 21 are integrally formed.
The peripheral wall portion 24 of the lid 13 is detachably fitted to the fixed cylinder 16. An undercut protrusion that undercuts and fits into the outer locking protrusion of the fixed cylinder 16 is formed on the inner peripheral surface of the peripheral wall portion 24 of the lid 13. At the lower end of the peripheral wall portion 24 of the lid 13, an operation projecting piece 23 projecting outward in the radial direction is formed at a portion located on the opposite side of the hinge portion 21 that sandwiches the cap shaft O in the radial direction. ..

A tubular regulating portion 25 projecting downward is formed on the top wall portion 35 of the lid body 13. The regulating portion 25 is arranged coaxially with the cap shaft O. The regulation portion 25 is formed with a regulation protrusion 25a protruding inward in the radial direction. The regulation protrusions 25a may extend continuously over the entire circumferential direction, may extend intermittently, or may be interspersed. The lower end opening edge of the regulating portion 25 faces the outer peripheral portion 18 of the upper surface of the top wall portion 12 in the vertical direction. The lower end opening edge of the regulating portion 25 faces the portion of the outer peripheral portion 18 located between the annular recess 18a and the fixing cylinder 16 in the vertical direction.

The inner plug 14 encloses the seal cylinder 29 fitted in the injection hole 15 and the seal cylinder 29 from the outside in the radial direction, and the lower end portion is in contact with or close to the upper surface of the top wall portion 12. A connecting plate 31 connecting the seal cylinder 29 and the outer cylinder 30 and a closing plate 32 for closing the inside of the seal cylinder 29 are provided.
The inner plug 14 covers and seals the injection hole 15 from above. The inner plug 14 is separated downward from the lower surface of the top wall portion 35 of the lid body 13.

The lower end of the seal cylinder 29 is located above the lower end of the outer cylinder 30. The outer diameter of the lower end of the seal cylinder 29 is larger than the inner diameter of the injection hole 15, and the lower end of the seal cylinder 29 is fitted in the injection hole 15 in an elastically deformed state. The seal cylinder 29 is in close contact with both the inner peripheral surface of the injection hole 15 and the outer peripheral surface of the seal auxiliary cylinder 22. The upper end of the seal cylinder 29 is located above the injection hole 15 and is separated downward from the lower surface of the top wall portion 35 of the lid 13.

The outer peripheral edge of the closing plate 32 is connected to a portion of the inner peripheral surface of the seal cylinder 29 located above the lower end portion outerly fitted to the seal auxiliary cylinder 22.
The connecting plate 31 is formed in an annular shape and covers the upper end opening edge of the dispensing cylinder 17 from above. The lower surface of the connecting plate 31 is located above the upper end opening edge of the dispensing cylinder 17. The upper surface of the connecting plate 31 is located below the lower surface of the top wall portion 35 of the lid 13. The upper surface of the connecting plate 31 may come into contact with the lower surface of the top wall portion 35 of the lid body 13.

The lower end of the outer cylinder 30 is fitted onto the stepped portion 20 of the top wall portion 12. The inner peripheral surface of the outer cylinder 30 is formed smoothly over the entire area. A protrusion that abuts on the stepped portion 20 may be formed on the inner peripheral surface of the outer cylinder 30. The inner peripheral surface of the outer cylinder 30 is in contact with or close to the outer surface of the guide wall portion 19a of the top wall portion 12. After opening the cap 1, when the lid 13 is attached to the cap body 11, the lower end of the outer cylinder 30 comes into contact with the outer surface of the guide wall 19a, so that the step 20 is smoothly inside the lower end of the outer cylinder 30. Fitted in. The lower end opening edge of the outer cylinder 30 is in contact with or close to the outer peripheral portion 18 of the top wall portion 12. The lower end opening edge of the outer cylinder 30 is in contact with or close to the bottom surface of the annular recess 18a of the outer peripheral portion 18.

The upper end portion of the outer cylinder 30 is inserted into the regulating portion 25 in a state of being separated downward from the lower surface of the top wall portion 35 of the lid body 13. The outer peripheral surface of the outer cylinder 30 is separated inward in the radial direction from the inner peripheral surface of the regulating portion 25. The upper end portion of the outer cylinder 30 is arranged in the regulating portion 25 so as to be vertically movable. The force required to move the outer cylinder 30 up and down in the regulating portion 25 is smaller than the force required to move the seal cylinder 29 up and down in the injection hole 15.

A locking portion 14a projecting outward in the radial direction is formed on the outer peripheral surface of the outer cylinder 30. The locking portion 14a is arranged at the upper end portion of the outer cylinder 30. The locking portion 14a is in contact with or is close to the regulation protrusion 25a formed in the regulation portion 25 of the lid 13 from above the regulation protrusion 25a. As a result, when the lid 13 opens the top wall portion 12, the regulation protrusion 25a engages with the locking portion 14a from below the locking portion 14a, so that the lid 13 of the inner plug 14 is engaged. Regulate dropouts from.

Here, in the inner plug 14, the uppermost portion is the upper surface of the connecting plate 31. The vertical gap A between the upper surface of the connecting plate 31 and the lower surface of the top wall portion 35 of the lid 13 is smaller than the fitting depth B of the seal cylinder 29 with respect to the injection hole 15. In the illustrated example, the fitting depth B of the seal cylinder 29 with respect to the injection hole 15 is equivalent to the fitting depth B of the seal cylinder 29 with respect to the seal auxiliary cylinder 22.
The gap A may be set to be equal to or greater than the fitting depth B, and the fitting depth B and the fitting depth of the seal cylinder 29 with respect to the seal auxiliary cylinder 22 may be different from each other.

Then, in the present embodiment, the inner plug 14 has a space X defined by the outer peripheral surface of the seal cylinder 29, the inner peripheral surface of the outer cylinder 30, the lower surface of the connecting plate 31, and the upper surface of the top wall portion 12. A leak inspection hole 26 is formed which is outside the space X and communicates with the outside of the cap body 11 (hereinafter referred to as the outside of the cap body).
The leak inspection hole 26 is formed in the connecting plate 31. The leak inspection hole 26 communicates the space X with the outside of the cap body in the vertical direction. One leak inspection hole 26 is formed in the inner plug 14. The outside of the cap body is a space surrounded by the lid body 13, the top wall portion 12, and the inner plug 14 when the lid body 13 is attached to the cap body 11. The space X is formed in an annular shape that extends continuously over the entire circumferential direction.

Next, the assembly process of the cap 1 will be described with reference to FIG.

First, the molded body 27 in which the lid body 13, the cap body 11, and the hinge portion 21 are integrally formed, and the inner plug 14 are individually formed. Of these, the molded body 27 is formed by, for example, injection molding, in which the cap body 11, the hinge portion 21 in the fully opened state, and the lid 13 turned upside down are arranged in one direction when viewed from the vertical direction. To.
Next, the inner plug 14 is attached to the cap body 11. At this time, the seal cylinder 29 is fitted in the injection hole 15, the step portion 20 of the top wall portion 12 is fitted in the outer cylinder 30, and the outer peripheral surface of the seal cylinder 29 and the inner peripheral surface of the outer cylinder 30 are fitted. The space X is defined by the lower surface of the connecting plate 31 and the upper surface of the top wall portion 12.

Then, a positive pressure or a negative pressure is applied to the peripheral wall portion 36 of the cap body 11. At this time, for example, a case body (not shown) provided with a pressure gauge is attached to the cap body 11, and the upper surface of the top wall portion 12 and the inner plug 14 are integrally placed in a sealed space to obtain the pressure gauge. By confirming the numerical value, it is possible to inspect whether or not the seal cylinder 29 seals the injection hole 15. That is, if the value of the pressure gauge fluctuates, it is found that the seal cylinder 29 does not seal the injection hole 15, and if the value of the pressure gauge does not fluctuate, the seal cylinder 29 seals the injection hole 15. I understand.
Next, for the cap 1 determined that the seal cylinder 29 seals the injection hole 15, the lid 13 is rotated around the hinge portion 21 and the top wall 12 is closed by the lid 13.

As described above, according to the cap 1 according to the present embodiment, when the lid body 13 is moved upward with respect to the top wall portion 12, the regulating portion 25 of the lid body 13 becomes the locking portion 14a of the inner plug 14. By engaging, the inner plug 14 moves upward with respect to the top wall portion 12 together with the lid body 13. At this time, the seal cylinder 29 of the inner plug 14 is separated from the injection hole 15, and the top wall portion 12 and the injection hole 15 are opened.

Since the inner plug 14 includes an outer cylinder 30 whose lower end portion is in contact with or is close to the upper surface of the top wall portion 12, the inner plug 14 can be easily assembled to the cap body 11, and the inner plug 14 is a cap. In the state of a single component before being assembled to the main body 11, external force is less likely to be applied to the seal cylinder 29, deformation of the seal cylinder 29 can be suppressed, and the injection hole 15 is securely sealed by the seal cylinder 29. can do.

Since the leak inspection hole 26 is formed in the inner plug 14, when the seal cylinder 29 does not seal the injection hole 15, when the inside of the cap body 11 is made a positive pressure or a negative pressure, Air flows from one of the inside of the cap body 11 and the outside of the cap body to the other through the unsealed portion in the injection hole 15, the space X, and the leak inspection hole 26. Become.

As a result, when pressure is applied to the inside of the cap body 11 when the seal cylinder 29 does not seal the injection hole 15, air is passed through the leak inspection hole 26 to allow the outer cylinder 30 to pass through. Even though the lower end is in contact with or close to the upper surface of the top wall 12, air flows smoothly between the space X and the outside of the cap body with little resistance, and the seal cylinder 29 It is possible to efficiently inspect whether or not the injection hole 15 is sealed.

Since the outer cylinder 30 of the inner plug 14 is fitted onto the stepped portion 20 on the upper surface of the top wall portion 12, even if the positive pressure in the container body W is applied to the inner plug 14 through the pouring hole 15, the inner plug 14 is inside. It is possible to prevent the plug 14 from floating with respect to the cap body 11, and when the inner plug 14 is assembled to the cap body 11, the relative positions of the inner plug 14 and the cap body 11 are determined. It can be easily assembled.
Since the outer cylinder 30 is fitted onto the stepped portion 20 of the top wall portion 12, it is difficult for the space X and the outside of the cap body to communicate with each other through between the outer cylinder 30 and the upper surface of the top wall portion 12. The effect of the leak inspection hole 26 that enables the above-mentioned inspection to be performed efficiently is remarkably achieved.

Since the inner plug 14 is separated downward from the lower surface of the top wall portion 35 of the lid body 13, even if an unexpected external force is applied to the top wall portion 35 of the lid body 13, it is possible to prevent the external force from being applied to the inner plug 14. The injection hole 15 can be reliably sealed by the seal cylinder 29.

The force required to move the outer cylinder 30 up and down in the regulating portion 25 is smaller than the force required to move the seal cylinder 29 up and down in the injection hole 15. Therefore, when the lower end of the seal cylinder 29 comes into contact with the inner peripheral surface of the injection hole 15 in the process of attaching the lid 13 to the cap body 11 after opening the cap 1, the downward movement of the inner plug 14 is suppressed. On the other hand, the lid body 13 continuously moves downward and is attached to the cap body 11.
As a result, the fitting depth of the seal cylinder 29 with respect to the injection hole 15 becomes shallower than that in the unopened state of the cap 1, and the next time the injection hole 15 is opened, the lid 13 is attached to the cap body 11. On the other hand, the force required to move the cap 1 upward can be reduced as compared with the unopened state of the cap 1.

The fitting depth B of the seal cylinder 29 with respect to the injection hole 15 is larger than the vertical gap A between the inner plug 14 and the lower surface of the top wall portion 35 of the lid 13. Therefore, in the process of attaching the lid body 13 to the cap body 11 after opening the cap 1, the downward movement of the inner plug 14 is suppressed as described above, while the downward movement of the lid body 13 is continuously performed. , As shown in FIG. 3, the lower surface of the top wall portion 35 of the lid 13 abuts on the inner plug 14, and then the lid 13 and the inner plug 14 move downward as a unit to form the seal cylinder 29. Enters the injection hole 15, and the lid 13 is attached to the cap body 11.

At this time, the fitting depth B of the seal cylinder 29 with respect to the injection hole 15 is about the vertical gap A between the inner plug 14 and the lower surface of the top wall portion 35 in the unopened state of the cap 1, and the cap. It becomes shallower than the unopened state of 1, and the force required to move the lid 13 upward with respect to the cap body 11 when the injection hole 15 is opened next time is defined as the unopened state of the cap 1. In addition to being able to reduce the number of seals, the seal cylinder 29 can be securely fitted in the injection hole 15, and the seal cylinder 29 can reliably seal the injection hole 15.
At this time, the seal cylinder 29 may or may not be fitted onto the seal auxiliary cylinder 22.

Since the seal auxiliary cylinder 22 is arranged inside the injection hole 15, and the seal cylinder 29 is in close contact with both the inner peripheral surface of the injection hole 15 and the outer peripheral surface of the seal auxiliary cylinder 22. It is possible to reliably improve the mounting strength of the inner plug 14 to the top wall portion 12 in the unopened state, and it is possible to more reliably suppress the above-mentioned lifting of the inner plug 14 with respect to the cap body 11. The sealing property of the injection hole 15 can be reliably ensured.

Next, the cap 2 according to the second embodiment of the present invention will be described with reference to FIG.
In the second embodiment, the same parts as the components in the first embodiment are designated by the same reference numerals, the description thereof will be omitted, and only the different points will be described.

In the present embodiment, the leak inspection hole 28 is formed in the outer cylinder 30. The leak inspection hole 28 is formed at the lower end of the outer cylinder 30 and opens at the lower end opening edge of the outer cylinder 30. The vertical positions of the upper ends of the leak inspection hole 28 and the step portion 20 are equal to each other, and the upper end portion of the leak inspection hole 28 is opened in both the inner and outer directions in the radial direction. ing.
Also in this embodiment, the same action and effect as those in the above-described embodiment are obtained.

The present invention is not limited to the above-described embodiment, and can be appropriately modified without departing from the spirit of the present invention.

For example, in the above embodiment, the lid body 13 shows a hinge cap connected to the cap body 11 via the hinge portion 21, but the lid body 13 is connected to the cap body 11 via the hinge portion 21. Instead, a configuration or the like that is detachably screwed to the cap body 11 may be adopted.
The upper surface of the top wall portion 12 of the cap body 11 may be formed flat over the entire area.
The seal cylinder 29 may be fitted in the injection hole 15 over the entire length in the vertical direction, and the outer peripheral surface of the seal cylinder 29 does not have to define the space X.

In addition, it is possible to replace the components in the above-described embodiment with well-known components as appropriate without departing from the spirit of the present invention, and the above-mentioned modifications may be appropriately combined.

1, 2 Cap 11 Cap body 12 Top wall 13 Lid 14 Inner plug 14a Locking part 15 Injection hole 18 Outer circumference 19 Inner circumference 20 Steps 21 Hinge 25 Restriction 26, 28 Leak inspection hole 29 Seal Cylinder 30 Outer Cylinder 31 Connecting Plate A Gap B Fitting Depth O Cap Shaft W Container Body W1 Mouth X Space

Claims (4)

A topped tubular cap body that is attached to the mouth of the container body,
Of the cap body, a lid that opens and closes the top wall on which the content injection hole is formed, and
A cap provided between the top wall portion and the lid body and provided with an inner plug that covers and seals the injection hole from above.
The inner plug
The seal cylinder fitted in the injection hole and
An outer cylinder that surrounds the seal cylinder from the outside in the radial direction and whose lower end abuts or is close to the upper surface of the top wall portion.
A connecting plate for connecting the seal cylinder and the outer cylinder is provided.
When the top wall portion is opened, the lid body engages with the locking portion provided on the inner plug from below the locking portion, and the inner plug falls off from the lid body. There is a regulatory department that regulates
The inner plug includes a space defined by the inner peripheral surface of the outer cylinder, the lower surface of the connecting plate, and the upper surface of the top wall portion, and the outside of this space and the outside of the cap body. A cap with a leak inspection hole that communicates with it. The upper surface of the top wall is
The outer circumference of the ring and
An annular inner peripheral portion that is located inside and above the outer peripheral portion in the radial direction and has the inside as the injection hole.
A step portion that connects the outer peripheral portion and the inner peripheral portion and faces outward in the radial direction is provided.
The cap according to claim 1, wherein the outer cylinder is externally fitted to the step portion. The inner plug is separated downward from the lower surface of the top wall portion of the lid body.
The regulating portion is formed in a tubular shape, and the outer cylinder is arranged in the regulating portion so as to be vertically movable.
The cap according to claim 1 or 2, wherein the force required to move the outer cylinder up and down in the regulation portion is smaller than the force required to move the seal cylinder up and down in the injection hole. The cap according to claim 3, wherein the fitting depth of the seal cylinder with respect to the injection hole is larger than the vertical gap between the inner plug and the lower surface of the top wall portion of the lid.

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