JP7229100B2 - cap - Google Patents

Description

The present invention relates to caps.

Patent Literature 1 discloses a cap that includes a fixing portion that is fixed to the mouth portion of a container body, and a capped cylindrical lid body. The fixed portion is formed with a pouring tube portion, a spout-forming tearing portion, and a top plate portion. The lid body is formed with welding protrusions that are welded to the flat portion of the top plate portion. According to the configuration of Patent Literature 1, when the lid is opened for the first time, the spout-forming rupturable portion is ruptured along the weakened line, allowing the container to be opened.

JP 2012-111535 A

In the configuration of Patent Document 1, the welding between the welding projection piece and the flat portion may be released before the weakening line is broken. , there was room for improvement.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a cap capable of improving operability when opening a container.

In order to solve the above-described problems, a cap according to an aspect of the present invention includes a fixing portion fixed to a mouth portion of a container body in which contents are stored, and a capped cylindrical lid body, The fixing portion has a pouring tube portion extending in the vertical direction, and an intermediate plate portion which is formed in an annular shape in a plan view viewed from the up-down direction and positioned inside the pouring tube portion, and the lid The body is formed with a seal body that extends downward from the top wall of the lid body and is inserted into the pouring tube part to seal the inside of the pouring tube part. is welded.

According to the cap of the aspect described above, since the inner side of the pouring tube portion is sealed by the sealing member, it is possible to prevent the contents from leaking out through the pouring tube portion when the lid is closed. Further, the fixed portion is formed with an intermediate plate portion which is formed in an annular shape in a plan view, is located inside the pouring tube portion, and is welded with a seal body. With this configuration, when the lid is opened for the first time, the container can be opened by releasing the welding between the seal and the intermediate plate. As a result, the container can be opened more reliably than, for example, when the container is opened by partially breaking the fixing portion, and the operability at the time of opening can be improved.

Here, the seal body may have a first seal portion in contact with the entire circumference of the inner peripheral surface of the pouring tube portion, and a second seal portion welded to the intermediate plate portion.

In this case, when the container provided with the cap is shipped, the container is doubly sealed by the first seal portion and the second seal portion. Therefore, it is possible to more reliably prevent the seal from being released due to impact or the like during transportation or storage of the container. Furthermore, even after the lid is opened, the welding between the middle plate and the second seal is released, and the lid is closed again, the inside of the pouring cylinder can be sealed by the first seal. can. Therefore, even after the container is unsealed, if the lid is closed, leakage of the contents can be suppressed.

Also, the second seal portion may be welded to the upper surface of the intermediate plate portion.

In this case, for example, even if the seal body tends to move downward with respect to the fixed portion due to an external force or the like, a force that separates the second seal portion from the intermediate plate portion by welding is less likely to occur. Therefore, it is possible to prevent the welding from being unintentionally released by an external force.

Also, the second seal portion may be welded to the inner peripheral surface of the intermediate plate portion.

In this case, when the cap of the above aspect is viewed from below, the welded surface between the intermediate plate portion and the second seal portion can be visually recognized. Therefore, it is possible to improve the workability when performing welding.

Further, a guide portion projecting upward may be formed on the inner peripheral edge of the intermediate plate portion.

In this case, when the lid that has been opened is closed again, the guide portion guides the second seal portion, so that the second seal portion can smoothly enter the inner side of the intermediate plate portion. Therefore, it is possible to improve the operability when closing the once opened lid.

In addition, a seal recess recessed downward is formed on the upper surface of the intermediate plate portion, and the second seal portion enters inside the seal recess, so that the inner surface of the seal recess and the second seal portion are formed. may be welded.

In this case, since the second seal portion is located inside the seal recess, it is difficult for the contents to pass through the gap between the intermediate plate portion and the second seal portion. Therefore, it is possible to further improve the sealing performance in both the state at the time of shipment and the state in which the lid is once opened and then closed again. Moreover, since the contact area between the intermediate plate portion and the second seal portion can be increased, the second seal portion can be welded to the intermediate plate portion more reliably.

Further, a guide portion projecting upward may be formed at the opening edge of the seal recess.

In this case, when the lid is once opened and then closed again, the guide portion can guide the second seal portion toward the inside of the seal concave portion. This makes it possible to improve the operability when closing the lid.

In addition, a recess that is recessed downward is formed on the upper surface of the top wall, and the position of the inner peripheral surface of the recess in the radial direction may be radially outward of the second seal portion. good.

In this case, when the cap of the above aspect is attached to the container body, it is possible to suppress the application of downward force to the second seal portion. Therefore, it is possible to suppress the application of a force that would separate the weld between the second seal portion and the intermediate plate portion.

Moreover, the lid body may be connected to the fixing portion so as to be rotatable about a hinge.

In this case, it becomes possible to integrally form the lid body and the fixing portion, and the manufacturing cost of the cap according to the above aspect can be reduced.

According to the aspect of the present invention, it is possible to provide a cap capable of improving operability when opening a container.

1 is a longitudinal sectional view of a container provided with a cap according to a first embodiment; FIG. It is the arrow directional view which looked at the cap of FIG. 1 from the II direction. It is a figure which shows the modification of the communicating hole of FIG. 2A. 2B is a diagram showing another modification of the communication hole of FIG. 2A; FIG. FIG. 10 is a longitudinal sectional view of a container provided with a cap according to a second embodiment; FIG. 11 is a vertical cross-sectional view of a container provided with a cap according to a third embodiment; FIG. 11 is a longitudinal sectional view of a container provided with a cap according to a fourth embodiment; 5B is an enlarged view of the V portion of FIG. 5A; FIG.

(First embodiment)
Hereinafter, the cap of the first embodiment and a container provided with the cap will be described with reference to the drawings.
As shown in FIG. 1 , the container 1 includes a bottomed cylindrical container body 2 in which contents are stored, and a cap 3A attached to the container body 2 . The cap 3</b>A includes a fixing portion 10 fixed to the mouth portion 2 a of the container body 2 and a topped cylindrical lid body 20 . The contents are not particularly limited, but liquids such as seasonings and beverages can be used, for example.

As shown in FIG. 1, the lid 20 is connected to the fixed portion 10 by a hinge H. As shown in FIG. The lid body 20 is rotatable about the hinge H with respect to the fixed part 10 . However, the lid body 20 and the fixed part 10 do not have to be connected by the hinge H. For example, the lid body 20 may be screwed to the fixed part 10 .

(direction definition)
In this embodiment, the central axis of the lid body 20 is called a cap axis O, and the direction along the cap axis O is called an up-down direction. In addition, in the vertical direction, the top wall 21 side of the lid body 20 is referred to as the upper side, and the opening portion side of the peripheral wall 22 is referred to as the lower side. Viewing from above and below is called planar view. In plan view, 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. Among the radial directions, the direction connecting the circumferential central portion of the hinge H and the circumferential central portion of the knob portion 23 shown in FIG. 2 is referred to as the front-rear direction. The hinge H side in the front-rear direction is called the rear, and the knob 23 side is called the front.

As shown in FIG. 1, the fixed portion 10 includes a fixed tubular portion 11, a connecting tubular portion 12, a fitting tubular portion 13, an annular portion 14, an extraction tubular portion 15, an inclined portion 16, and an intermediate plate. a portion 17; The fixed tubular portion 11, the connecting tubular portion 12, the fitting tubular portion 13, the annular portion 14, the extraction tubular portion 15, the inclined portion 16, and the intermediate plate portion 17 are arranged coaxially with the cap axis O.

The fixed tubular portion 11 surrounds the mouth portion 2a of the container body 2 from the radial outside. A fitting portion 11 a that protrudes radially inward is formed on the inner peripheral surface of the fixed cylindrical portion 11 . The fitting portion 11a is undercut-fitted to the protrusion 2b formed on the outer peripheral surface of the mouth portion 2a, thereby restricting the upward movement of the fixed cylindrical portion 11 with respect to the container body 2. As shown in FIG. As shown in FIGS. 1 and 2, the fixed tubular portion 11 is formed with a lightening portion that extends vertically and extends over the entire circumference in the circumferential direction. A portion of the fixed tubular portion 11 located radially outside and a portion located radially inward of the lightening portion are connected by a connecting portion 11b and a plurality of connecting pieces 11c provided at the lower end portion. The connecting portion 11b is positioned in a predetermined range in the front, and a plurality of connecting pieces 11c are formed at intervals in the circumferential direction in other portions. The connecting piece 11c has a small thickness and is easily broken. On the other hand, the connecting portion 11b is thicker than the connecting piece 11c and is less likely to break. When the cap 3A is separated and discarded from the container 1, the breakable connecting piece 11c is broken by pulling up the lid 20, loosening the fitting between the fixed cylindrical portion 11 and the mouth portion 2a of the container body 2, and the connecting portion 11b. The entire fixing part 10 connected with can be removed.

As shown in FIG. 1, the fitting tube portion 13 is fitted into the mouth portion 2a. The fitting cylinder portion 13 is positioned radially inside the fixed cylinder portion 11 . The connecting tubular portion 12 connects the upper end portion of the fitting tubular portion 13 and the upper end portion of the fixed tubular portion 11 . The connecting tube portion 12 contacts the upper end face of the mouth portion 2a from above. The inner peripheral surface of the connecting tube portion 12 gradually increases in diameter as it goes upward.
The annular portion 14 extends radially inward from the lower end portion of the fitting cylinder portion 13 and has an annular shape in plan view.

The pouring tube portion 15 extends upward from the inner peripheral edge of the annular portion 14 . The extraction tube portion 15 is positioned radially inside the fitting tube portion 13 . The upper end portion of the pouring cylinder portion 15 gradually expands in diameter as it goes upward. The height of the upper end portion of the pouring tube portion 15 is uneven in the circumferential direction, and the portion of the pouring tube portion 15 positioned rearward (hinge H side) is positioned forward (knob portion 23 side). lower than the part that A restricting portion 15 a is formed on the inner peripheral surface of the pouring tube portion 15 . The restricting portion 15 a is a vertical rib extending in the vertical direction, and protrudes radially inward from the inner peripheral surface of the pouring tube portion 15 . The regulating portion 15a is provided on the inner peripheral surface of a portion of the pouring tube portion 15 located rearward (on the side of the hinge H).

The inclined portion 16 and the intermediate plate portion 17 are provided at the lower end opening of the pouring tube portion 15 . The inclined portion 16 is gradually inclined radially inward as it goes downward. A radial gap is provided between the lower end of the inclined portion 16 and the inner peripheral edge of the annular portion 14 . A gap may not be provided between the lower end portion of the inclined portion 16 and the inner peripheral edge of the annular portion 14 .

The intermediate plate portion 17 protrudes radially inward from the lower end portion of the inclined portion 16 . The intermediate plate portion 17 is formed in an annular shape and positioned inside the pouring tube portion 15 in a plan view. The inner peripheral surface of the intermediate plate portion 17 is formed with a communication hole 17a that allows the inside of the container body 2 and the inside of the pouring cylinder portion 15 to communicate with each other. As shown in FIG. 2A, the communication hole 17a of this embodiment is formed in a substantially rhombic shape in plan view. The intermediate plate portion 17 is also formed in a substantially diamond-shaped annular shape in a plan view in accordance with the shape of the communication hole 17a.

Note that the shape of the communication hole 17a can be changed as appropriate. For example, as shown in FIG. 2B, the intermediate plate portion 17 may be formed with four fan-shaped communication holes 17b. The communication hole 17b is arranged so as to surround the cap shaft O. As shown in FIG. Alternatively, communication holes 17c and 17d as shown in FIG. 2C may be employed. The communication hole 17c is elliptical, and the communication hole 17d is L-shaped. The communication holes 17c and 17d are arranged so as to sandwich the cap shaft O therebetween. As shown in FIGS. 2B and 2C, by providing a plurality of communication holes, for example, while the contents are poured out from some of the communication holes, the outside air is introduced into the container body 2 from the remaining communication holes to smoothly It is also possible to pour out the contents. The shape of the communication hole can be appropriately changed according to the type of contents of the container body 2 .

As shown in FIG. 1 , the lid body 20 has a top wall 21 , a peripheral wall 22 , a knob portion 23 and a seal body 24 . The top wall 21 is formed in a disc shape. The upper surface of the top wall 21 is formed with a concave portion 21a that is recessed downward. A rear lower end portion of the peripheral wall 22 is connected to the upper end portion of the fixed tubular portion 11 by a hinge H. As shown in FIG. The knob portion 23 protrudes radially outward from a front lower end portion of the peripheral wall 22 .

The seal body 24 extends downward from the top wall 21 and is inserted into the pouring tube portion 15 . The seal body 24 of this embodiment is formed in a double tubular shape having an outer tubular portion 24a and an inner tubular portion 24b. An annular gap is formed in plan view between the outer cylinder portion 24a and the inner cylinder portion 24b. A gap is also formed between the inner tubular portion 24b and the extraction tubular portion 15. As shown in FIG.
The seal body 24 does not have to be double cylindrical, and may have, for example, a stepped cylindrical shape that fills the gap between the outer cylindrical portion 24a and the inner cylindrical portion 24b. The seal body 24 has a first seal portion 24c and a second seal portion 24d.

The outer cylinder portion 24 a is located radially outside the inner cylinder portion 24 b and radially inside the pouring cylinder portion 15 . The height of the lower end portion of the outer cylinder portion 24a is uneven in the circumferential direction, and the lower end portion of the portion of the outer cylinder portion 24a located on the rear side (hinge H side) extends forward (on the knob portion 23 side). It is lower than the lower edge of the portion where it is located. The first seal portion 24c is formed along the outer peripheral surface of the lower end portion of the outer cylindrical portion 24a. The first seal portion 24c is a portion that protrudes radially outward from the lower end portion of the outer tubular portion 24a, and extends in the circumferential direction over the entire circumference of the lower end portion of the outer tubular portion 24a. The first seal portion 24c is in contact with the inner peripheral surface of the extraction cylinder portion 15 over the entire circumference. The first seal portion 24c may not protrude radially outward, and in this case, the lower end portion of the outer cylinder portion 24a may serve as the first seal portion 24c.

The vertical length of the inner tubular portion 24b is longer than that of the outer tubular portion 24a. The second seal portion 24 d is a portion of the seal body 24 welded to the intermediate plate portion 17 . The second seal portion 24d in this embodiment is the lower end portion of the inner cylindrical portion 24b. The lower surface of the second seal portion 24d, that is, the lower surface of the inner cylindrical portion 24b is welded to the upper surface of the intermediate plate portion 17. As shown in FIG. Thermal welding, high-frequency welding, ultrasonic welding, or the like can be used as welding.

Next, the operation of the cap 3A configured as above will be described.

As a method for attaching the cap 3A to the container body 2, so-called capping can be adopted. When the stopper is employed, the cap 3A is pressed against the container body 2 from above to elastically or plastically deform the fixed cylindrical portion 11 of the fixed portion 10, thereby undercutting the fitting portion 11a to the projecting portion 2b. Mate.

When plugging, if the radial central portion of the top wall 21 of the lid body 20 is strongly pushed downward, the lower end (second sealing portion 24d) of the inner cylindrical portion 24b pushes the intermediate plate portion 17 downward. It is conceivable that it may be pushed toward the target. When the lower end of the inner cylindrical portion 24b presses the intermediate plate portion 17 downward, the intermediate plate portion 17 may be deformed, or the welding between the intermediate plate portion 17 and the second seal portion 24d may be released due to peeling.

Therefore, in this embodiment, the top wall 21 is formed with a recess 21a. By pressing a portion of the top wall 21 where the recess 21a is not formed when plugging, it is possible to prevent the inner cylindrical portion 24b from pressing the intermediate plate portion 17 downward. Furthermore, the outer cylinder portion 24a faces the regulation portion 15a in the vertical direction, and when the outer cylinder portion 24a attempts to move downward by a predetermined amount or more with respect to the pouring cylinder portion 15, the lower end portion of the outer cylinder portion 24a is restricted. It abuts on the upper end of the portion 15a. Therefore, downward movement of the outer tube portion 24a relative to the extraction tube portion 15 by a predetermined amount or more is restricted. As a result, the downward movement of the inner cylindrical portion 24b is also restricted, so that the deformation of the intermediate plate portion 17 and the release of welding can be suppressed more reliably.

When the container 1 is shipped, the first seal portion 24c is in contact with the inner peripheral surface of the pouring tube portion 15, and the second seal portion 24d is welded to the upper surface of the intermediate plate portion 17. As shown in FIG. Since the inside of the pouring tube portion 15 is sealed by the two sealing portions 24c and 24d in this way, leakage of the contents of the container body 2 through the communication hole 17a and the pouring tube portion 15 is suppressed. can.

When using the container 1, the lid 20 is rotated upward around the hinge H. As shown in FIG. Alternatively, when the lid body 20 is screwed to the fixed part 10 , the lid body 20 is rotated around the cap axis O with respect to the fixed part 10 . At this time, the first seal portion 24c is separated from the inner peripheral surface of the extraction tube portion 15, and the second seal portion 24d is separated upward from the intermediate plate portion 17. As shown in FIG. As a result, the welding between the second seal portion 24d and the intermediate plate portion 17 can be released.

After that, when the lid body 20 is rotated downward around the hinge H, the first seal portion 24c comes into contact with the inner peripheral surface of the pouring tube portion 15 again. As a result, the inside of the pouring tube portion 15 can be sealed again by the first seal portion 24c. Further, when the lid body 20 is rotated downward around the hinge H, the second seal portion 24 d comes into contact with the upper surface of the middle plate portion 17 . Thereby, it is also possible to block the flow of contents between the second seal portion 24 d and the intermediate plate portion 17 .

As described above, according to the cap 3A of the present embodiment, since the inside of the pouring tube portion 15 is sealed by the sealing body 24, when the lid 20 is closed, the communicating hole 17a and the pouring Contents can be prevented from leaking out through the cylindrical portion 15 . A middle plate portion 17 is formed in the fixed portion 10 . The intermediate plate portion 17 is formed in an annular shape in a plan view, is located inside the pouring tube portion 15, and is welded with a seal body 24. As shown in FIG. With this configuration, when the lid body 20 is opened for the first time, the container 1 can be opened by releasing the welding between the seal body 24 and the intermediate plate portion 17 . As a result, the container can be opened more reliably than, for example, when the container is opened by partially breaking the fixing portion 10, and the operability at the time of opening can be improved.

Further, the seal body 24 has a first seal portion 24 c that is in contact with the inner peripheral surface of the pouring tube portion 15 over the entire circumference, and a second seal portion 24 d that is welded to the intermediate plate portion 17 . With this configuration, when the container 1 is shipped, the container 1 is doubly sealed by the first seal portion 24c and the second seal portion 24d. Therefore, when the container 1 is transported or stored, it is possible to more reliably prevent the seal from being released due to an impact or the like. Furthermore, even after the lid 20 is opened with respect to the fixed portion 10 and the welding between the intermediate plate portion 17 and the second seal portion 24d is released, if the lid 20 is closed again, the first seal portion 24c The inside of the pouring tube part 15 can be sealed. Therefore, even after the container 1 is unsealed, if the lid 20 is closed, it is possible to prevent the contents from leaking out.

Also, the second seal portion 24 d is welded to the upper surface of the intermediate plate portion 17 . As a result, even if the seal member 24 were to move downward with respect to the fixed portion 10 due to an external force or the like, a force that separates the second seal portion 24d from the intermediate plate portion 17 by welding is less likely to occur. Therefore, it is possible to prevent the welding from being unintentionally released by an external force.

In addition, a concave portion 21a that is recessed downward is formed on the upper surface of the top wall 21 of the lid 20, and the position of the inner peripheral surface of the concave portion 21a in the radial direction is radially outward of the second seal portion 24d. positioned. With this configuration, when the cap 3A is attached to the container body 2, it is possible to suppress the application of downward force to the second seal portion 24d. Therefore, it is possible to suppress the application of force between the second seal portion 24d and the intermediate plate portion 17 that would cause the welding to separate.

Further, since the lid body 20 is rotatably connected to the fixed part 10 around the hinge H, the lid body 20 and the fixed part 10 can be integrally formed, and the manufacturing cost of the cap 3A can be reduced. can be reduced.

Further, gaps are formed between the inner tubular portion 24b and the outer tubular portion 24a and between the inner tubular portion 24b and the extraction tubular portion 15. As shown in FIG. This gap acts as a liquid pool of the content when the content leaks from between the second seal portion 24d and the intermediate plate portion 17 due to an impact or the like. This prevents the contents from rushing toward the first seal portion 24c, and prevents the contents from leaking from between the first seal portion 24c and the pouring tube portion 15. As shown in FIG. Furthermore, an inclined portion 16 is provided between the pouring cylinder portion 15 and the communication hole 17a, so that the content liquid that has entered the liquid pool can be easily collected into the container body 2 along the inclined portion 16. ing. This makes it difficult for the content liquid to accumulate on the intermediate plate portion 17 .

(Second embodiment)
Next, a second embodiment according to the present invention will be described, but the basic configuration is the same as that of the first embodiment. For this reason, the same reference numerals are assigned to the same configurations, the description thereof is omitted, and only the points of difference will be described.

As shown in FIG. 3, in the cap 3B of this embodiment, the second seal portion 24d is inserted into the communication hole 17a. The inner peripheral surface of the intermediate plate portion 17 (that is, the inner surface of the communication hole 17a) is welded to the outer peripheral surface of the second seal portion 24d.

According to this embodiment, when the cap 3B is viewed from below, the welded surface between the intermediate plate portion 17 and the second seal portion 24d can be visually recognized. Therefore, it is possible to improve the workability when performing welding.

(Third Embodiment)
Next, a third embodiment according to the present invention will be described, but the basic configuration is the same as that of the second embodiment. For this reason, the same reference numerals are assigned to the same configurations, the description thereof is omitted, and only the points of difference will be described.

As shown in FIG. 4, a guide portion 18 is provided on the cap 3C of this embodiment. The guide portion 18 protrudes upward from the upper surface of the intermediate plate portion 17 . The guide portion 18 is positioned at the rear (hinge H side) end portion of the inner peripheral edge of the intermediate plate portion 17 (the opening edge of the communication hole 17a).

According to the cap 3C of the present embodiment, since the guide portion 18 is provided on the inner peripheral edge of the intermediate plate portion 17, when the lid body 20 that has been opened once is closed again, the second seal portion 24d is positioned in the communication hole 17a. You can easily enter inside. Therefore, it is possible to improve the operability when closing the once-open lid 20 . In this embodiment, since the lid 20 and the fixed portion 10 are connected by the hinge H, the rear end portion of the second seal portion 24d enters the communication hole 17a before the front end portion thereof. Therefore, since the guide portion 18 is provided behind the communication hole 17a, the guide portion 18 can guide the second seal portion 24d more reliably.

In FIG. 4, one guide portion 18 is provided. However, a plurality of guide portions 18 may be provided. In this case, for example, a plurality of guide portions 18 may be arranged at intervals in the circumferential direction along the opening edge of the communication hole 17a (the inner peripheral edge of the intermediate plate portion 17).
Further, the guide portion 18 may be formed with a tapered surface for making it easier for the second seal portion 24d to enter the communication hole 17a. The tapered surface may be formed, for example, on a surface facing radially inward of the guide portion 18 and may gradually extend outward in the radial direction as it goes upward. Such a tapered surface allows the second seal portion 24d to enter the communication hole 17a more smoothly when the lid body 20 is closed.

(Fourth embodiment)
Next, a third embodiment according to the present invention will be described, but the basic configuration is the same as that of the first embodiment. For this reason, the same reference numerals are assigned to the same configurations, the description thereof is omitted, and only the points of difference will be described.

As shown in FIGS. 5A and 5B, a seal recess 17e and a guide portion 19 are formed in the cap 3D of this embodiment. The seal recess 17 e is recessed downward from the upper surface of the intermediate plate portion 17 . The seal recess 17e is formed in an annular shape in plan view. The seal recess 17e is radially separated from the inner peripheral surface of the intermediate plate portion 17 (communication hole 17a). The second seal portion 24d is inserted inside the seal recess 17e, and the second seal portion 24d and the inner surface of the seal recess 17e are welded together.

The guide portion 19 protrudes upward from the opening edge of the seal recess 17e. In this embodiment, the guide portion 19 protrudes from the rear end portion of the radially inner opening edge of the seal recess portion 17e. Since the guide portion 19 is provided, the second seal portion 24d can smoothly enter the seal recess portion 17e when closing the lid body 20 once opened. Therefore, it is possible to improve the operability when closing the once-open lid 20 .

In this embodiment, since the lid body 20 and the fixed portion 10 are connected by the hinge H, the rear end portion of the second seal portion 24d enters the seal recess portion 17e before the front end portion. Therefore, by providing the guide portion 19 at the rear end portion of the opening edge of the seal recess portion 17e, the guide portion 19 can more reliably guide the second seal portion 24d.

In FIG. 5A, one guide portion 19 is provided. However, a plurality of guide portions 19 may be provided. In this case, for example, a plurality of guide portions 19 may be arranged at intervals in the circumferential direction along the opening edge of the seal recess portion 17e.
Further, the guide portion 19 may be formed with a tapered surface for making it easier for the second seal portion 24d to enter the seal recess portion 17e. The tapered surface may be formed, for example, on a surface of the guide portion 19 facing radially outward, and may extend radially inward as it goes upward. Such a tapered surface allows the second seal portion 24d to enter the seal recess 17e more smoothly.

As described above, according to the cap 3D according to the fourth embodiment, the second seal portion 24d enters inside the seal recess portion 17e. This configuration makes it difficult for the contents to pass through the gap between the intermediate plate portion 17 and the second seal portion 24d. Therefore, it is possible to further improve the sealing performance in both the shipping state and the state in which the lid body 20 is once opened and then closed again. Moreover, since the contact area between the intermediate plate portion 17 and the second seal portion 24d can be increased, the second seal portion 24d can be welded to the intermediate plate portion 17 more reliably.

Further, since the guide portion 19 protruding upward is formed at the opening edge of the seal recess portion 17e, the second seal portion 24d is sealed by the guide portion 19 when the lid body 20 is opened once and then closed again. It can be guided inside the recess 17e. Thereby, the operability when closing the lid body 20 can be improved. However, the guide portion 19 may not be formed.

The technical scope of the present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the present invention.

For example, in the above-described embodiment, both the first seal portion 24c and the second seal portion 24d seal the inside of the dispensing cylinder portion 15, but only one of the first seal portion 24c and the second seal portion 24d seals the inside. The inside of the pouring cylinder part 15 may be sealed.
Further, the position of the intermediate plate portion 17 may be any position as long as it is inside the extraction tube portion 15 and below the outer tube portion 24a in plan view.

Alternatively, the recess 21a may not be formed in the top wall 21 of the lid 20, and the portion of the capping machine that contacts the top wall 21 may be formed in an annular shape, and the vicinity of the peripheral wall 22 may be pressed downward. However, by forming the concave portion 21a as in the above-described embodiment, deformation and tearing of the middle plate portion 17 can be suppressed even when a general-purpose capping machine is used.
Also, the inclined portion 16 may not be provided, and the intermediate plate portion 17 may be directly connected to the lower end portion of the extraction tube portion 15 .

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

For example, the guide portion 19 described in the fourth embodiment may be provided in the cap 3A in the first embodiment.

DESCRIPTION OF SYMBOLS 2 Container body 2a Mouth 3A to 3D Cap 10 Fixing part 15 Extraction tube part 17 Intermediate plate part 17e Seal recess 18, 19 Guide part 20 Lid 21 Top wall 21a Recess 24 ... seal body 24c... first seal portion 24d... second seal portion H... hinge

Claims (6)

a fixing portion fixed to the mouth portion of the container body in which the contents are accommodated;
a capped cylindrical lid,
The fixing portion has a pouring tube portion extending in the vertical direction, and an intermediate plate portion which is formed in an annular shape and positioned inside the pouring tube portion in a plan view seen from the vertical direction,
The lid body is formed with a sealing body that extends downward from the top wall of the lid body and is inserted into the pouring tube portion to seal the inside of the pouring tube portion,
the seal body and the intermediate plate portion are welded together ,
The cap, wherein the sealing body has a first sealing portion that is in contact with the inner peripheral surface of the pouring tube portion over the entire circumference, and a second sealing portion that is welded to the inner peripheral surface of the intermediate plate portion. 2. The cap according to claim 1 , wherein a guide portion protruding upward is formed on the inner peripheral edge of said intermediate plate portion. a fixing portion fixed to the mouth portion of the container body in which the contents are accommodated;
a capped cylindrical lid,
The fixing portion has a pouring tube portion extending in the vertical direction, and an intermediate plate portion which is formed in an annular shape and positioned inside the pouring tube portion in a plan view seen from the vertical direction,
The lid body is formed with a sealing body that extends downward from the top wall of the lid body and is inserted into the pouring tube portion to seal the inside of the pouring tube portion,
the seal body and the intermediate plate portion are welded together,
The seal body has a first seal portion in contact with the entire circumference of the inner peripheral surface of the pouring tube portion, and a second seal portion welded to the intermediate plate portion,
A sealing recess recessed downward is formed on the upper surface of the intermediate plate,
The cap, wherein the second seal portion enters inside the seal recess, and the inner surface of the seal recess and the second seal portion are welded together. 4. The cap according to claim 3 , wherein a guide portion protruding upward is formed on the opening edge of said seal recess. A concave portion recessed downward is formed on the upper surface of the top wall,
5. The cap according to any one of claims 2 to 4 , wherein the radial position of the inner peripheral surface of the recess is located radially outside of the second seal portion. The cap according to any one of claims 1 to 5 , wherein the lid body is connected to the fixed portion so as to be rotatable about a hinge.

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