JP7300933B2 - cap - Google Patents

Description

The present invention relates to caps.

Conventionally, as shown in Patent Document 1 below, for example, a capped cylindrical container having a peripheral wall portion inside which the mouth portion of a container body is fitted and a top wall portion in which a hole for pouring out the contents is formed. A cap that includes a cap body and a lid that opens and closes a top wall is known.

Japanese Patent No. 5851854

However, with the conventional cap, for example, when the cap is attached to the mouth of the container body filled with high-temperature contents and is showered with water during a sterilization process or the like, water splashes on the lower end of the peripheral wall portion. Through the opening, there is a risk of entering between the inner peripheral surface of the peripheral wall portion and the outer peripheral surface of the mouth portion and reaching the upper end opening edge of the mouth portion.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a cap that can prevent shower water that has passed through the lower opening of the peripheral wall from reaching the upper edge of the opening of the mouth. With the goal.

In order to solve the above-mentioned problems and achieve such objects, the cap of the present invention is a top having a peripheral wall portion in which the mouth portion of the container body is fitted and a hole for pouring out the contents. A cap comprising a cylindrical cap body having a wall and a lid for opening and closing the top wall, wherein the inner peripheral surface of the peripheral wall abuts the upper opening edge of the mouth. An upper projection and a lower projection abutting on a locking projection formed on the outer peripheral surface of the mouth portion from below the locking projection, the upper projection facing downward and An upper contact surface that extends upward from the radially outer side to the inner side, and the lower protrusion faces upward and extends downward from the radially outer side to the inner side. It has an abutment surface.

According to the present invention, the upper protrusion having the upper contact surface that contacts the upper end opening edge of the mouth on the inner peripheral surface of the peripheral wall, and the locking protrusion are contacted from the lower side of the locking protrusion. A lower protrusion having a lower abutment surface is formed. As a result, the upper end opening edge of the mouth portion and the lower end portion of the locking projection can be sandwiched between the upper contact surface and the lower contact surface in the vertical direction. A portion between the inner peripheral surface of the mouth portion and the lower end portion of the locking projection can be sealed. Therefore, when the cap is attached to the mouth of the container body filled with high-temperature content, for example, when the cap is showered with water during a sterilization process or the like, water flows through the opening at the lower end of the peripheral wall, Even if it enters between the inner peripheral surface of the peripheral wall portion and the outer peripheral surface of the mouth portion, it can be prevented from reaching the upper end opening edge of the mouth portion.
Since the upper contact surface and the lower contact surface sandwich the upper end opening edge of the mouth portion and the lower end portion of the locking protrusion in the vertical direction, there is variation in the vertical dimension of the mouth portion for each container body. However, this variation can be absorbed and the cap can be stably attached to the mouth.

The top wall may be formed with a fitting tube tightly fitted into the opening.

In this case, since the ceiling wall portion is formed with a fitting cylinder that is tightly fitted into the opening, the upper end of the opening is radially moved by the outer peripheral surface of the fitting cylinder and the inner peripheral surface of the peripheral wall portion. Thus, the upper contact surface can be brought into strong contact with the upper opening edge of the mouth. As a result, it is possible to reliably prevent the shower water that has passed through the lower opening of the peripheral wall from reaching the edge of the upper opening of the mouth.

A sealing body is disposed between the top wall portion and the lid body and is detachably fitted in the pouring hole, and is arranged radially outside the pouring hole in the cap main body. The lid body is formed in a truncated tubular shape and is detachably fitted into the mounting portion, and the top wall portion is formed between the pouring hole and the mounting portion. A leak test hole is formed in a portion located between the lid and the upper surface of the top wall portion to communicate with the sealed space between the lid and the upper surface of the top wall portion and to make this sealed space a positive pressure or a negative pressure. may be

In this case, since a leak test hole is formed in a portion of the top wall portion of the cap main body located between the spout hole and the mounting portion, the leak test hole can be passed through the top wall portion of the lid and the top wall portion. By applying positive pressure or negative pressure to the sealed space between the upper surface and the sealed space, this pressure is applied to the boundary portion between the spout hole and the seal body located in the sealed space, and the lid body and the mounting part. It becomes possible to apply simultaneously to the boundary part of Thus, by checking the presence or absence of gas flow between the spout hole and the seal body and the presence or absence of gas flow between the lid body and the mounting part, it is possible to determine whether the spout is sealed. Not only the space between the hole and the seal body but also the space between the lid body and the mounting portion of the cap body can be inspected at the same time.
As described above, since it is possible to suppress the shower water that has passed through the lower end opening of the peripheral wall from reaching the upper end opening rim of the mouth, the shower water passes through the leak inspection hole and flows into the lid. Ingress into the sealed space between the body and the upper surface of the ceiling can be prevented.

According to the present invention, it is possible to prevent shower water that has passed through the lower opening of the peripheral wall from reaching the upper opening edge of the mouth.

1 is a vertical cross-sectional view of a cap shown as an embodiment according to the present invention; FIG. FIG. 2 is a partially enlarged view of the cap shown in FIG. 1; 1. It is explanatory drawing explaining the manufacturing method of the cap shown in FIG.

A cap 1 according to an embodiment of the present invention will be described below with reference to the drawings.
As shown in FIG. 1, the cap 1 of this embodiment includes a topped cylindrical cap body 11 attached to the mouth portion W1 of the container body W, and a lid body for opening and closing the top wall portion 12 of the cap body 11. 13 and.

The container body W is, for example, an extrusion blow container formed by blow molding a parison formed by extrusion molding or the like. The container body W may be formed by biaxially stretching blow molding a preform formed by injection molding.
The lid body 13 is connected to the peripheral wall portion 36 of the cap body 11 via the hinge portion 21 . The lid body 13, the cap main body 11, and the hinge portion 21 are integrally formed.

In the illustrated example, the lid body 13 is formed in a capped cylindrical shape, and the lid body 13 and the cap main body 11 are arranged coaxially with a common axis. Hereinafter, this common axis will be referred to as a cap axis O. Along the cap axis O, the top wall portion 35 side of the lid body 13 will be referred to as the upper side, and the open end side of the peripheral wall portion 36 of the cap body 11 will be referred to as the lower side. When viewed from above and below, the direction intersecting the cap axis O is called the radial direction, and the direction rotating around the cap axis O is called the circumferential direction.

In the top wall portion 12, a content pouring hole 15, an annular mounting portion 16 arranged radially outside the pouring hole 15, and a ring-shaped mounting portion 16 arranged radially inside the mounting portion 16 and inside the mounting portion 16 A pouring tube 17 having a pouring hole 15 and an annular protrusion 18 disposed between the pouring hole 15 and the mounting portion 16 are formed. The pouring hole 15, the mounting portion 16, the pouring cylinder 17, and the annular protrusion 18 are arranged coaxially with the cap axis O. As shown in FIG.
Note that the mounting portion 16, the pouring tube 17, and the annular protrusion 18 may not be formed on the top wall portion 12. The mounting portion 16 may be formed on the peripheral wall portion 36 of the cap body 11 .

The pouring hole 15 penetrates the top wall portion 12 in the vertical direction. The pouring tube 17 protrudes upward from the peripheral edge of the opening of the pouring hole 15 on the upper surface of the top wall portion 12 .
The mounting portion 16 protrudes upward from the outer peripheral edge portion of the upper surface of the ceiling wall portion 12 . The mounting portion 16 extends continuously over the entire length in the circumferential direction. The upper end of the mounting portion 16 is located below the upper end of the extraction tube 17 . The mounting portion 16 is formed with an outer locking projection projecting outward in the radial direction.
The annular protrusion 18 protrudes upward from the central portion between the pouring hole 15 and the mounting portion 16 on the upper surface of the top wall portion 12 . The upper end portions of the annular protrusion 18 and the mounting portion 16 are positioned at the same vertical positions.

A rectifier 33 is formed on the lower surface of the ceiling wall portion 12 . The rectifier 33 includes a first cylindrical body 33a extending downward from the periphery of the opening of the pouring hole 15 on the lower surface of the ceiling wall 12, and protruding radially inward from the lower end of the first cylindrical body 33a. , a ring plate portion 33b extending continuously over the entire length in the circumferential direction, and a topped cylindrical second cylindrical body 33c extending upward from the inner peripheral edge portion of the ring plate portion 33b.

The upper end portion of the second cylindrical body 33c and the ceiling wall portion 12 have the same vertical position. The lower ends of the first cylindrical body 33a and the second cylindrical body 33c and the ring plate portion 33b are located at the same vertical position as the lower end of the peripheral wall portion 36 of the cap body 11. As shown in FIG.

A communication hole 33d and an air replacement hole 33e are formed in the first cylindrical body 33a for communicating the inside of the container body W and the inside of the first cylindrical body 33a. The inside of the container main body W and the pouring hole 15 can communicate with each other through the communication hole 33d, the air replacement hole 33e, and the inside of the first cylindrical body 33a.
The air replacement hole 33e is provided in the rear portion of the first cylindrical body 33a, which is located on the hinge portion 21 side in the radial direction when viewed from the vertical direction. 33 d of communication holes are provided in the front part which opposes a rear part in the diametrical direction, seeing from an up-down direction, in the 1st cylinder 33a. The upper end of the air replacement hole 33e is located above the upper end of the communication hole 33d. In the illustrated example, the entire air replacement hole 33e is located above the upper end of the communication hole 33d.

A fitting cylinder 20 is formed on the lower surface of the ceiling wall portion 12 so as to extend downward and be tightly fitted into the opening W1. The fitting tube 20 is arranged coaxially with the cap axis O. As shown in FIG. The fitting tube 20 is arranged in a portion of the lower surface of the top wall portion 12 located between the annular protrusion 18 and the mounting portion 16 . The inner peripheral surface of the fitting tube 20 is positioned radially inward from the outer peripheral surface of the annular protrusion 18 .

The lower surface of the ceiling wall portion 12, the outer peripheral surface of the fitting tube 20, 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 length in the circumferential direction. An annular groove coaxially disposed with O is defined. The upper end of the mouth W1 is inserted into this annular groove. The top opening edge W2 of the mouth portion W1 abuts against the lower surface of the ceiling wall portion 12 .

A portion of the top wall portion 12 located between the pouring hole 15 and the mounting portion 16 communicates with the sealed space X between the lid body 13 and the upper surface of the top wall portion 12, and this sealed space X is connected to the front. A leak test hole 22 is formed for applying pressure or negative pressure.

The leak test hole 22 opens in a portion of the upper surface of the top wall portion 12 that is continuous with the mounting portion 16 from the inside in the radial direction. The leak test hole 22 opens in a portion of the upper surface of the ceiling wall portion 12 that is closest to the hinge portion 21 among the portions that are connected to the mounting portion 16 from the inner side in the radial direction. The leak test hole 22 opens in a portion of the lower surface of the top wall portion 12 that is positioned radially outward from the fitting tube 20 . A leak test hole 22 opens in the annular groove. The lower end opening of the leak test hole 22 is closed by the upper end opening edge W2 of the mouth portion W1.

The leak test hole 22 includes an upper hole 22 a that opens to the upper surface of the ceiling wall portion 12 and a lower hole 22 b that extends downward from the upper hole 22 a and opens to the lower surface of the ceiling wall portion 12 .
The radial size of the upper hole 22a is larger than the radial size of the lower hole 22b. The circumferential size of the upper hole 22a is smaller than the circumferential size of the lower hole 22b. The upper hole 22a opens at the center of the lower hole 22b in the circumferential direction.

The upper hole 22a has a circular shape when viewed in the vertical direction, and the lower hole 22b has a curved rectangular shape extending along the circumferential direction. The radially inner ends of the upper hole 22a and the lower hole 22b are located at the same radial position. The radially outer end of the lower hole 22b is located in the radially intermediate portion of the upper hole 22a.
The flow passage cross-sectional area of the leak test hole 22 may be of a size through which gas can pass during the later-described confirmation process, and the diameter of the upper hole 22a is, for example, approximately 0.5 mm to 2 mm.

A lower protrusion 31 is formed on the inner peripheral surface of the peripheral wall portion 36 of the cap main body 11 so as to abut on the locking projection W3 formed on the outer peripheral surface of the mouth portion W1 from below the locking projection W3. ing. The lower protrusion 31 is undercut-fitted to the locking protrusion W3. The lower protrusion 31 is provided at the lower end of the peripheral wall portion 36 . The lower protrusion 31 is formed to have a curved surface protruding inward in the radial direction. The lower protrusion 31 extends continuously over the entire length in the circumferential direction. The lower protrusion 31 has a lower contact surface 31a that faces upward and extends downward from the radially outer side to the inner side. The lower contact surface 31a abuts on the locking protrusion W3 of the opening W1 from below the locking protrusion W3.

An inner peripheral surface of the peripheral wall portion 36 of the cap body 11 is formed with an upper protrusion 32 that abuts on the upper end opening edge W2 of the mouth portion W1. The upper protrusion 32 is provided at the upper end portion of the peripheral wall portion 36 and integrally formed with the inner peripheral surface of the peripheral wall portion 36 and the lower surface of the ceiling wall portion 12 . The upper protrusion 32 extends continuously over the entire length in the circumferential direction. The upper protrusion 32 is connected to the outer peripheral edge of the lower surface of the ceiling wall portion 12 . The upper protrusion 32 is connected to a portion of the lower surface of the top wall portion 12 that continues from the outside in the radial direction with respect to the leak test hole 22 .

The upper protrusion 32 has an upper contact surface 32a that faces downward and extends upward from the radially outer side to the inner side. The upper contact surface 32a contacts the upper opening edge W2 of the mouth W1. In the illustrated example, the upper contact surface 32a is in contact with the connecting portion between the upper opening edge W2 and the outer peripheral surface of the mouth portion W1. A radial inner edge of the upper contact surface 32 a is connected to the lower surface of the ceiling wall portion 12 . A portion of the radially inner edge of the upper contact surface 32 a continues from the radially outer side to the inner peripheral surface of the lower end portion of the leak test hole 22 .
The radially inner edge of the upper contact surface 32 a may be positioned below the lower surface of the ceiling wall portion 12 or radially outside the leak test hole 22 .

The inclination angles θ1 and θ2 of the upper contact surface 32a and the lower contact surface 31a with respect to the vertical direction are substantially the same. Each of the inclination angles θ1 and θ2 is 30° or more and 50° or less. In the illustrated example, the inclination angles θ1 and θ2 are approximately 45°. In a vertical cross-sectional view along the vertical direction, the length of the upper contact surface 32a is longer than the length of the lower contact surface 31a.

At the lower end of the peripheral wall portion 24 of the lid body 13, an operation projecting piece 23 projecting radially outward is formed at a portion located on the opposite side of the hinge portion 21 that sandwiches the cap axis O in the radial direction. .
A peripheral wall portion 24 of the lid body 13 is detachably fitted to the mounting portion 16 . The inner peripheral surface of the peripheral wall portion 24 of the lid body 13 is formed with an undercut protrusion that is undercut-fitted to the outer locking protrusion of the mounting portion 16 . The peripheral wall portion 24 of the lid body 13 is in continuous contact with the upper opening edge of the mounting portion 16 over the entire length in the circumferential direction. By fitting the lid 13 to the mounting portion 16, the space between the lid 13 and the upper surface of the top wall portion 12 is openably sealed.

Extending downward to the top wall portion 35 of the lid body 13, the lower end portion abuts or approaches a portion of the upper surface of the top wall portion 12 located between the pouring hole 15 and the mounting portion 16. An outer cylinder 19 is formed. The outer cylinder 19 is arranged coaxially with the cap axis O. As shown in FIG. A lower end portion of the outer cylinder 19 is detachably fitted in an annular protrusion 18 of the top wall portion 12 . A lower opening edge of the outer cylinder 19 is in contact with or close to the upper surface of the ceiling wall portion 12 .

A window hole 19a is formed through the outer cylinder 19 in the radial direction. A window hole 19 a is formed at the lower end of the outer cylinder 19 . The upper end of the window hole 19a is located above the upper end of the annular projection 18. As shown in FIG. The window hole 19a is arranged in a portion of the outer cylinder 19 that is closest to the hinge portion 21 when viewed in the vertical direction.
The outer peripheral surface of the lower end portion of the outer cylinder 19 is brought into contact with or close to the inner peripheral surface of the annular protrusion 18, while the lower end opening edge of the outer cylinder 19 is separated upward from the upper surface of the ceiling wall portion 12. etc., may be changed as appropriate.

A seal member 14 is detachably fitted in the pouring hole 15 between the top wall portion 12 and the lid member 13 . Thus, in this embodiment, the cap 1 is a so-called unplugless cap that does not have a removable plugging portion that closes the pouring hole 15 . It should be noted that the cap 1 may adopt a structure having the plugging portion without the sealing body 14, for example.

Seal body 14 extends downward from top wall portion 35 of lid body 13 and is formed integrally with lid body 13 . The seal body 14 is formed in a cylindrical shape and arranged coaxially with the cap axis O. As shown in FIG. A lower end portion of the seal body 14 is located below the lower surface of the ceiling wall portion 12 .
Note that the sealing body 14 may be separate from the lid body 13 . The sealing body 14 is not limited to a cylindrical shape, and may be, for example, a solid rod-like shape or a block-like shape. The lower end portion of the seal body 14 may be positioned at the same vertical position or above the top surface of the top wall portion 12 and the lower end portion of the outer cylinder 19 .

A main seal outer surface portion 14a and a temporary seal outer surface portion 14b extending downward from the lower end portion of the main seal outer surface portion 14a and having an outer diameter smaller than that of the main seal outer surface portion 14a are formed on the outer peripheral surface of the seal body 14. there is The main seal outer surface portion 14 a and the temporary seal outer surface portion 14 b are formed below the outer peripheral surface of the seal body 14 .
On the other hand, the main seal inner surface portion 15a, to which the main seal outer surface portion 14a is tightly fitted in a detachable manner, and the main seal inner surface portion 15a extend downward from the lower end of the main seal inner surface portion 15a and A temporary seal inner surface portion 15b having an inner diameter smaller than that of the seal inner surface portion 15a is formed.
The temporary seal outer surface portion 14b is loosely fitted to the temporary seal inner surface portion 15b compared to the fitting of the main seal outer surface portion 14a to the main seal inner surface portion 15a.

Next, a method for manufacturing the cap 1 will be described.

First, a molded body in which the lid body 13, the cap body 11, and the hinge portion 21 are integrally formed is formed. The molded body is formed by injection molding, for example, in a manner in which the cap main body 11, the fully opened hinge portion 21, and the vertically inverted lid body 13 are arranged in this order in one direction when viewed from above ( molding process).
Next, the lid 13 is rotated around the hinge portion 21 to fit the sealing member 14 into the pouring hole 15 and the mounting portion 16 into the peripheral wall portion 24 of the lid 13. form an assembly that looks the same as the cap 1 as shown in (assembly step).
Then, through the leak test hole 22, the sealed space X between the lid 13 and the upper surface of the ceiling wall portion 12 is set to a negative pressure, and the gas flow between the spout hole 15 and the seal 14 and the lid The presence or absence of each gas flow between the body 13 and the mounting portion 16 is confirmed (confirmation step).
Through the molding process, the assembly process, and the confirmation process described above, it was found that there was no gas flow between the spout 15 and the seal body 14 and between the lid body 13 and the mounting portion 16, respectively. After confirmation, the cap 1 is obtained.

In this embodiment, a mounting table 25 and a cover 26 as shown in FIG. 3 are used during the confirmation process.

A support cylinder portion 27 is formed on the upper surface of the mounting table 25 so as to protrude upward. During the confirmation step, the lower surface of the top wall portion 12 is placed on the upper opening edge of the support cylinder portion 27 . At this time, a boundary portion between the inner peripheral surface of the pouring hole 15 and the outer peripheral surface of the seal body 14 is positioned inside the support cylinder portion 27 . The inner diameter of the support cylinder portion 27 is larger than the inner diameter of the pouring hole 15, and the boundary portion between the inner peripheral surface of the pouring hole 15 and the outer peripheral surface of the seal body 14 extends over the entire circumferential length of the support tubular portion. Located inside 27. As a result, communication between the leak test hole 22 and the boundary portion between the inner peripheral surface of the pouring hole 15 and the outer peripheral surface of the seal body 14 through the inside of the cap body 11 is blocked.

The upper end portion of the support cylinder portion 27 may be fitted into the fitting cylinder 20 and the upper end opening edge of the support cylinder portion 27 may be separated downward from the lower surface of the ceiling wall portion 12 .
In the illustrated example, the upper end opening edge of the support cylinder portion 27 supports a portion of the lower surface of the top wall portion 12 located between the spout hole 15 and the fitting cylinder 20 . The inside communicates with the boundary portion between the inner peripheral surface of the pouring hole 15 and the outer peripheral surface of the seal body 14 through the communication hole 33d, the air replacement hole 33e, and the inside of the first cylindrical body 33a.

The lower opening edge of the peripheral wall portion 36 of the cap main body 11 is in contact with the upper surface of the mounting table 25 while the lower surface of the ceiling wall portion 12 is placed on the upper opening edge of the support cylinder portion 27 . The top surface of the mounting table 25 is flat over the entire area. Since a through-groove penetrating in the radial direction is not formed in the lower end opening edge of the peripheral wall portion 36 of the cap body 11 , the leakage test hole 22 and the cap body pass through the lower end opening of the peripheral wall portion 36 of the cap body 11 . 11 is disconnected from the outside. At this time, the lower opening edge of the fitting tube 20 is separated upward from the upper surface of the mounting table 25 .

The cover 26 is formed in a truncated cylindrical shape, and the bottom opening edge thereof is placed on the upper surface of the mounting table 25 to form a closed space Y with the upper surface of the mounting table 25 . The cover 26 covers the aforementioned assembly supported by the mounting table 25, and this assembly is arranged in the closed space Y. As shown in FIG.
A first communication path 28 , a second communication path 29 and a third communication path 30 are formed in the mounting table 25 .

The first communication path 28 opens to a portion of the upper surface of the mounting table 25 that is located outside the support cylinder portion 27 , and the lower surface of the ceiling wall portion 12 is placed on the upper end opening edge of the support cylinder portion 27 . The first communication path 28 communicates with the leak test hole 22 through the inside of the cap body 11 . An air pressure supply device such as a vacuum pump is connected to the first communication passage 28, for example.
The second communication path 29 opens to a portion of the upper surface of the mounting table 25 located inside the support cylinder portion 27 . The second communication passage 29 extends between the inner peripheral surface of the spout hole 15 and the outer peripheral surface of the seal body 14 through the inner side of the support cylindrical portion 27, the communication hole 33d, the air replacement hole 33e, and the inner side of the first cylindrical body 33a. It communicates with the border. A measuring instrument such as a pressure gauge is arranged in the second communication path 29 .
The third communication path 30 opens directly to the outside of the assembly supported by the mounting table 25 , that is, the closed space Y, on the upper surface of the mounting table 25 . A measuring instrument such as a pressure gauge is arranged in the third communication path 30 .

In the above configuration, when the air pressure supply device is operated, the sealed space X between the lid 13 and the upper surface of the top wall portion 12 is opened through the first communication passage 28, the inside of the cap main body 11, and the leak test hole 22. Air is sucked from, and the sealed space X becomes a negative pressure.

At this time, when the sealing body 14 does not seal the pouring hole 15, the boundary portion between the inner peripheral surface of the pouring hole 15 and the outer peripheral surface of the sealing body 14, the inside of the first cylindrical body 33a, the communicating hole 33d, Due to the generation of an airflow toward the sealed space X in the air replacement hole 33e, the inner side of the support cylinder portion 27, and the second communication path 29, the measured value of the measuring instrument provided in the second communication path 29 fluctuates. . Thereby, it can be determined that the sealing body 14 does not seal the pouring hole 15 .
On the other hand, when the sealing body 14 seals the pouring hole 15, such an airflow is not generated, so the measured value of the measuring instrument provided in the second communication passage 29 does not fluctuate. , it can be determined that the sealing body 14 seals the pouring hole 15 .

On the other hand, if the space between the peripheral wall portion 24 of the lid body 13 and the mounting portion 16 of the cap body 11 is not sealed, the third communication passage 30 will have an airflow toward the sealed space Y, and the sealed space Y will have an air current flowing through the assembly. Air currents toward the sealed space X through the vicinity of the boundary between the cap main body 11 and the lid body 13 outside the are generated, respectively, so that the measurement value of the measuring device arranged in the third communication passage 30 fluctuates. Accordingly, it can be determined that the gap between the lid body 13 and the mounting portion 16 is not sealed.
On the other hand, if the space between the lid 13 and the mounting portion 16 is sealed, such an airflow will not occur, so the measured value of the measuring instrument provided in the third communication passage 30 will fluctuate. Therefore, it can be determined that the gap between the lid body 13 and the mounting portion 16 is sealed.

As described above, according to the cap 1 according to the present embodiment, the upper projection 32 has the upper contact surface 32a on the inner peripheral surface of the peripheral wall portion 36 of the cap body 11 and contacts the upper end opening edge W2 of the mouth portion W1. and a lower protrusion 31 having a lower abutment surface 31a that abuts on the locking projection W3 from the lower side of the locking projection W3. As a result, the upper opening edge W2 and the lower end of the locking projection W3 of the opening W1 can be sandwiched between the upper contact surface 32a and the lower contact surface 31a in the vertical direction. Between the outer peripheral surface and the inner peripheral surface of the peripheral wall portion 36, the portion located between the upper end opening edge W2 of the mouth portion W1 and the lower end portion of the locking protrusion W3 can be sealed.
Therefore, when the cap 1 is attached to the mouth portion W1 of the container body W filled with high-temperature contents, for example, and is showered with water during a sterilization process or the like, the water may splash on the cap body 11. Even if it enters between the inner peripheral surface of the peripheral wall portion 36 and the outer peripheral surface of the mouth portion W1 through the lower end opening of the peripheral wall portion 36, it can be prevented from reaching the upper end opening edge W2 of the mouth portion W1. .

Since the upper contact surface 32a and the lower contact surface 31a sandwich the upper end opening edge W2 of the mouth portion W1 and the lower end portion of the locking protrusion W3 in the vertical direction, the mouth portion W1 of each container body W is vertically Even if there is variation in the dimension in the direction, the variation can be absorbed and the cap 1 can be stably attached to the opening W1.

Since the top wall portion 12 of the cap main body 11 is formed with the fitting cylinder 20 that is tightly fitted into the mouth portion W1, the upper end portion of the mouth portion W1 is aligned with the outer peripheral surface of the fitting cylinder 20 and the peripheral wall portion 36. As a result, the upper contact surface 32a can be brought into strong contact with the upper end opening edge W2 of the mouth portion W1. As a result, the shower water that has passed through the lower end opening of the peripheral wall portion 36 of the cap body 11 can be reliably suppressed from reaching the upper end opening edge W2 of the mouth portion W1.

A leak test hole 22 is formed in a portion of the ceiling wall portion 12 of the cap body 11 located between the pouring hole 15 and the mounting portion 16 . By making the sealed space X between the upper surface of the ceiling wall portion 12 and the upper surface of the ceiling wall portion 12 a positive pressure or a negative pressure, this pressure is applied to the boundary portion between the spout hole 15 and the seal body 14 located in the sealed space X. , and the boundary portion between the lid body 13 and the mounting portion 16 can be simultaneously affected. Thus, whether or not the gas flow between the pouring hole 15 and the seal member 14 and between the lid member 13 and the mounting portion 16 is checked to determine whether or not the sealing is performed. can be inspected not only between the pouring hole 15 and the seal body 14 but also between the lid body 13 and the mounting portion 16 of the cap body 11 at the same time.

As described above, it is possible to prevent the shower water that has passed through the lower opening of the peripheral wall portion 36 of the cap body 11 from reaching the upper opening edge W2 of the mouth portion W1. It is possible to prevent entry into the sealed space X between the lid 13 and the upper surface of the top wall portion 12 through the leak test hole 22 .

The present invention is not limited to the above-described embodiments, and can be modified as appropriate without departing from the scope of the invention.

For example, in the above-described embodiment, the lid body 13 is a hinge cap connected to the cap body 11 via the hinge part 21. However, the lid body 13 is connected to the cap body 11 via the hinge part 21. Instead, for example, a configuration in which it is detachably screwed to the cap main body 11 may be adopted.

As the leak test hole 22, the configuration having the upper hole 22a and the lower hole 22b is shown, but it may be a single through-hole that penetrates the ceiling wall portion 12 in the vertical direction. Each shape of the hole 22a and the pilot hole 22b is not limited to the above-described embodiment, and may be changed as appropriate.

In the above embodiment, it is determined whether or not the gap between the pouring hole 15 and the seal body 14 is sealed, and whether or not the gap between the peripheral wall portion 24 of the lid body 13 and the mounting portion 16 of the cap body 11 is sealed. However, instead of this, for example, near the lower end opening of the pouring hole 15 inside the cap body 11 and near the boundary between the cap body 11 and the lid 13 outside the assembly. It may be determined based on the tactile sensation of whether or not the airflow touches the hand by holding the hand over the airflow.

A pressurization pump or the like is employed as an air pressure supply device, and the air pressure supply device is operated while the upper surface of the top wall portion 35 of the lid 13 is supported by the cover 26 during the confirmation process, and the leak test hole 22 is opened. Air may be supplied to the sealed space X through to make the sealed space X have a positive pressure.
Although the third communication path 30 is formed in the mounting table 25 and the measuring instrument is disposed in the third communication path 30, the third communication path 30 is not formed in the mounting table 25 and the measuring instrument is disposed in the closed space Y may be set.

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

Reference Signs List 1 cap 11 cap main body 12 ceiling wall portion 13 lid body 14 sealing body 15 spout hole 16 mounting portion 20 fitting cylinder 21 hinge portion 22 leak test hole 31 lower protrusion 31a lower contact surface 32 upper protrusion 32a upper contact Contact surface 36 Peripheral wall O Cap shaft W Container body W1 Mouth W2 Top opening edge W3 Locking projection X Sealed space

Claims (2)

a topped cylindrical cap body having a peripheral wall portion inside which the mouth portion of the container body is fitted, and a ceiling wall portion formed with a hole for pouring out the contents;
A cap that opens and closes the ceiling wall,
on the inner peripheral surface of the peripheral wall,
an upper protrusion abutting the upper end opening edge of the mouth;
a locking projection formed on the outer peripheral surface of the mouth portion is formed with a lower projection that abuts from the lower side of the locking projection,
The upper projection has an upper contact surface that faces downward and extends upward from the radially outer side to the inner side,
The lower protrusion has a lower contact surface that faces upward and extends downward from the radially outer side to the inner side ,
A sealing body disposed between the top wall portion and the lid body and detachably fitted in the pouring hole,
The cap body is formed with an annular mounting portion disposed radially outward from the pouring hole,
The lid body is formed in a capped tubular shape and is detachably fitted to the mounting portion,
In the top wall portion, a portion located between the pouring hole and the mounting portion communicates with the sealed space between the lid body and the top surface of the top wall portion, and the sealed space is pressurized positively. Alternatively, a cap formed with a leak inspection hole for creating a negative pressure . 2. The cap according to claim 1, wherein said top wall portion is formed with a fitting tube tightly fitted into said mouth portion.

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