JP7202072B2 - Sealing device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealing device, and more particularly, to a sealing device having a main body having a separable inner plug and a crown covering the main body.

Some containers, such as dressings, have a crown attached to cover the main body, with the outer periphery of the main body having an inner plug locked to the mouth of the container main body. The crown and the inner plug provided on the main body are connected by a screw mechanism, and the inner plug is sheared and separated from the outer peripheral portion by rotating the crown with respect to the main body. (For example, Patent Document 1).

In this container, by rotating the crown in one direction with respect to the main body, the inner plug on the side of the main body is drawn into the crown via the screw mechanism, thereby shearing and separating the inner plug from the outer peripheral portion and separating the inner plug in the main body. An opening is formed at the position of the stopper, and the inner stopper is held by the crown.

In the container described above, when the crown body is attached to the main body and the crown body is rotated with respect to the main body due to an unintended force acting during transportation or the like, the inner plug may be sheared off. .

WO2007/126062

SUMMARY OF THE INVENTION An object of the present invention is to provide a sealing device that prevents an inner plug from being sheared at an unintended timing.

In order to solve the above problems, the sealing device according to the present invention includes a main body attached to the mouth of a container body, a lid portion arranged so as to cover the main body, an annular base supported by the main body, and a lid portion. to the annular base so as to be freely openable and closable, the first tubular portion provided on the main body and the second tubular portion provided on the annular base of the crown A rotation support portion is provided between the main body and the crown member to rotatably connect the main body and the annular base of the crown by fitting. A positioning portion is provided between the main body and the annular base of the crown to prevent the crown from rotating clockwise and counterclockwise with respect to the main body and to temporarily fix it. and a restricting portion that prevents the crown from rotating with respect to the main body at a rotational position beyond the position where the inner plug is separated from the main body .

According to the above sealing device, the crown is not only rotatably held by the main body via the rotation support portion, but also held at the initial position before opening by the positioning portion. Therefore, it becomes difficult for the crown to rotate with respect to the main body, and a phenomenon in which the inner plug is inadvertently sheared at an unintended timing can be suppressed.

In a specific aspect or aspect of the present invention, in the sealing device described above, the positioning portion is provided on one of a pair of opposing peripheral surfaces of the first cylindrical portion of the main body and the annular base portion of the crown. At least one of the pair of peripheral surfaces has two first convex pieces, and two second convex pieces are provided on the other peripheral surface of the pair of peripheral surfaces so as to sandwich the first convex piece, and are formed on the other peripheral surface. The amount of protrusion of one of the second convex pieces is adjusted to the first convex piece or the second convex piece by the forcible turning force to the annular base with respect to the main body in a state where the second convex piece is engaged with the first convex piece. The convex piece is flexed to allow rotation of the annular base. In this case, the first convex piece provided on one peripheral surface is sandwiched between the two second convex pieces provided on the other peripheral surface before an external force exceeding a predetermined level is applied. Since it is maintained, it is possible to prevent the crown from rotating with respect to the inner plug in a normal state when a strong external force exceeding a predetermined level is not applied, and it is possible to reduce the risk of the inner plug being unintentionally sheared off from the main body. .

In another aspect of the present invention, of the two second convex pieces provided on the other peripheral surface, the other second convex piece is the first convex piece provided on the one peripheral surface. A stopper is formed by setting the amount of protrusion to prevent rotation. Here, to prevent the rotation means to prevent the rotation even if a strong external force exceeding a predetermined level is applied, such as when the package is intended to be opened. In this case, the crown is prevented from rotating in the closing direction opposite to the opening direction with respect to the main body. In other words, the crown can be rotated only in the opening direction with respect to the main body, and an erroneous opening operation can be avoided.

In still another aspect of the present invention, the rotation support part includes a first annular projection provided on the first tubular portion of the main body and a second annular projection provided on the second tubular portion of the annular base of the crown. a protrusion provided on one of the first annular protrusion and the second annular protrusion, and a protrusion provided on the other of the first annular protrusion and the second annular protrusion. Before the first annular projection and the second annular projection get over each other at the rotational position set by the positioning part when fitting the main body and the annular base of the crown body together. It further comprises a guide part in which the projection fits into the slit. In this case, when the ring-shaped convex portion of the crown body is rotated when the main body and the ring-shaped base portion of the crown member are fitted together, the projection fits into the slit of the ring-shaped convex portion. Since the crown body is thus guided to a predetermined position in the circumferential direction with respect to the main body, the threads of the crown body can be screwed into the threads of the inner plug in an appropriate positional relationship.

In still another aspect of the present invention, the restricting portion is a third convex piece protruding from predetermined positions on the opposing peripheral surfaces of the first tubular portion of the main body and the annular base portion of the crown.

In still another aspect of the present invention, a reverse rotation preventing portion is further provided for preventing rotation of the crown with respect to the main body in the closing direction at a predetermined position beyond the rotational position where the inner plug is separated from the main body. In this case, since the crown body after opening remains at a predetermined position after opening without being reversely rotated in the closing direction with respect to the main body, confirmation of opening is ensured.

In still another aspect of the present invention, the reverse rotation prevention part allows the crown to rotate relative to the main body in the opening direction and prevents the crown from rotating relative to the main body in the closing direction.

According to still another aspect of the present invention, the reverse rotation prevention section is configured by a ratchet mechanism.

1 is a conceptual cross-sectional view showing an embodiment of a sealing device according to the present invention, showing an unopened state; FIG. FIG. 4 is a conceptual cross-sectional view showing a state in which the inner plug of the main body is sheared; The body provided with the inner plug is shown, (a) is a plan view, and (b) is a vertical cross-sectional view. The crown is shown, (a) is a vertical cross-sectional view, and (b) is a bottom view. Fig. 4 is a partially enlarged exploded perspective view showing a fitting portion between the main body and the crown. (a) shows the positioning state in which the convex portion is fitted into the slit of the guide portion, and (b) shows the state before positioning in which the convex portion is fitted. FIG. 10 is a diagram showing a state in which the ring-shaped projection of the crown has passed over the ring-shaped projection of the main body and the rotation support is functioning. FIG. 4 is a partial cross-sectional view showing the state of engagement between the main body and the crown, where (a) shows the positioning portion in the unopened state or before shearing of the inner plug, and (b) shows the positioning portion after opening or after shearing the inner plug. showing the part. It is a partial sectional view explaining the modification of a positioning part and a reverse rotation prevention part.

An embodiment of a sealing device according to the present invention will be described below with reference to FIG. 1 and the like. In the following embodiments, the vertical positional relationship will be described in a state in which the container is erected with the axis X of the container vertical.

As shown in FIGS. 1 and 2, the sealing device 100 of the present embodiment includes a main body 10 engaged with the mouth portion 1a of the container main body 1 and a main body 10 engaged with the main body 10 so as to cover the main body 10. and a crown body 20.

As shown in FIGS. 3(a) and 3(b), the main body 10 includes an annular outer peripheral portion 11 fitted to the mouth portion 1a of the container body 1, and an inner plug 12 separated from the outer peripheral portion 11 when unsealed. and The main body 10 is an integrally molded product made of resin such as polyethylene by molding. Hereinafter, unsealing means that the inner plug 12 is separated from the outer peripheral portion 11, and the opening and closing of the crown 20 or the lid portion 22 after unsealing will be referred to as unsealing or closing.

The outer peripheral portion 11 of the main body 10 has a fitting portion 13 fitted to the end portion of the mouth portion 1 a of the container body 1 . The fitting portion 13 includes a large-diameter cylindrical wall 13a attached to the outer peripheral surface of the mouth portion 1a of the container body 1, a small-diameter cylindrical wall 13b attached to the inner peripheral surface of the mouth portion 1a of the container body 1, A flange-like annular wall 13c connects the upper ends of the cylindrical walls 13a and 13b. A bulging portion 13d is formed in the circumferential direction on the inner peripheral surface of the cylindrical wall 13a.

The outer peripheral portion 11 includes a large-diameter outer cylinder wall 14 extending substantially upward from the cylindrical wall 13b and a small-diameter inner cylinder wall 15 narrowing upward.

Two second convex pieces 30a and 30b forming the positioning portion 30 are formed on the inner peripheral surface of the outer cylinder wall 14, which is the first cylindrical portion. These second protruding pieces 30a and 30b are protruding strips extending in the vertical direction. It is arranged slightly wider than the circumferential width (thickness) of the shaped piece 35 (see FIG. 4(b)) (see FIG. 8(a)). In addition, the amount of projection in the radial direction of one of the second convex pieces 30a arranged on the clockwise rotation side when viewed from above is large enough to overlap the first convex piece 35 of the crown 20 ( See FIG. 8(a)). As a result, when the crown 20 is rotated in one direction (clockwise when viewed from above) with respect to the main body 10, the rotation of the first convex piece 35 is in the clockwise direction or one of the second convex portions. It is reliably blocked by the shaped piece 30a. That is, the second convex piece 30a functions as a stopper that prevents clockwise rotation of the crown 20 with respect to the main body 10. As shown in FIG. On the other hand, the amount of radial protrusion of the other second convex piece 30b arranged on the counterclockwise rotation side as viewed from above is such that it slightly overlaps the first convex piece 35 of the crown 20. . As a result, when the crown body 20 is forcibly rotated in the other direction (counterclockwise when viewed from above) with respect to the main body 10 with a force greater than or equal to a predetermined force, the forced rotation force causes the first convexity to be formed. The crown 20 is allowed to rotate by bending the counterclockwise rotation side or the other second convex piece 30b. As for the positioning part 30, not only the second convex piece 30b but also the first convex piece 35 can be bent to allow the rotation of the crown 20, and only the first convex piece 35 can be bent. Rotation of the crown 20 may be permitted.

The first convex piece 35 and the second convex pieces 30a and 30b described above constitute a first engagement mechanism for controlling the rotation of the crown 20 with respect to the main body 10 before and during opening. Two sets are provided at locations facing each other with the axis X interposed therebetween.

In addition, on the inner peripheral surface of the outer cylinder wall 14, on the counterclockwise rotation side when viewed from above the second convex piece 30b, a counterclockwise rotation direction with respect to the main body 10 when viewed from above the crown 20 is provided. A third convex piece 31a is formed to constitute a restricting portion 31 for preventing rotation. The third protruding piece 31a is a protruding strip extending in the vertical direction. When the main body 10 is rotated in the same direction (counterclockwise when viewed from above), the rotation of the first convex piece 35 is reliably prevented by the third convex piece 31a. . The third convex piece 31a prevents the crown 20 from excessively rotating in the opening direction after unsealing. Here, the first projecting piece 35 constitutes the restricting portion 31 together with the third projecting piece 31a, and also functions as the third projecting piece.

A ratchet mechanism is provided on the inner peripheral surface of the outer cylinder wall 14 on the side of the third convex piece 31a on the side of the second convex piece 30b and on the counterclockwise rotation side when viewed from above the second convex piece 30b. Constituent tongue 32a is formed. The tongue piece 32a constitutes a pawl of the ratchet mechanism and protrudes away from the outer cylinder wall 14 toward the third convex piece 31a. The tongue piece 32a is greatly inclined with respect to the radial direction as compared with the circumferential direction. The tongue piece 32 a provided on the main body 10 side and the first convex piece 35 provided on the crown body 20 side constitute a reverse rotation preventing portion 32 for the crown body 20 . After rotating the crown 20 in the other direction (counterclockwise when viewed from above) with respect to the main body 10, when returning to the one direction (clockwise when viewed from above), the first convex piece 35 is reliably blocked by the tongue piece 32a. The tongue piece 32a prevents the crown 20 from rotating in the closing direction after the package is opened.

The restricting portion 31 and the reverse rotation preventing portion 32 described above constitute a second engagement mechanism for controlling the rotation of the crown 20 with respect to the main body 10 after opening, and are provided at locations facing each other across the axis X. are set up.

An annular convex portion 16 is formed on the outer peripheral surface of the outer cylinder wall 14 that is the first cylindrical portion. This annular projection 16 engages with an annular projection 24 (see FIG. 4(a)) of the crown 20, which will be described later. At two locations on the outer peripheral surface of the end portion of the outer cylinder wall 14, convex portions 33a are formed to form guide portions 33 in cooperation with slits 33b of the crown body 20, which will be described later. The convex portion 33a is formed in the upper portion of the annular convex portion 16 so as to protrude radially outward from the outer peripheral surface of the end portion of the outer cylinder wall 14 (see FIG. 3B, etc.).

The inner plug 12 of the main body 10 has a bottomed cylindrical wall 12 a concentric with the inner cylindrical wall 15 and formed on the inner diameter side of the cylindrical wall 15 . The bottomed cylindrical wall 12a is connected to the inner cylindrical wall 15 via a flange-like connecting portion 17 projecting radially outward from the outer peripheral surface of the cylindrical wall 12a. An annular notch 17 a is formed in the lower surface of the connecting portion 17 .

On the outer peripheral surface of the bottomed cylindrical wall 12a of the inner plug 12, a male screw 34a is formed which constitutes a screw mechanism 34 in cooperation with a screw 34b provided on the cylindrical wall 22a of the crown 20, which will be described later.

As shown in FIGS. 4(a) and 4(b), the crown 20 includes an annular base 21 connected to the main body 10 shown in FIG. 12 and a hinge 23 that connects the lid portion 22 to the annular base portion 21 so that the lid portion 22 can be opened and closed. The crown 20 is an integrally molded product made of resin by die molding.

The annular base 21 has a large-diameter tubular wall 21a and a small-diameter tubular wall 21b. The cylindrical wall 21a and the cylindrical wall 21b are formed concentrically, and the inner peripheral surface of the cylindrical wall 21a, which is the second cylindrical portion, is provided with an annular convex portion 16 ( An annular protrusion 24 is formed to be engaged (see FIG. 3(a)). The annular protrusion 24 provided on the tubular wall (second tubular portion) 21a of the crown body 20 and the annular protrusion 16 provided on the outer tubular wall (first tubular portion) 14 of the main body 10 are fitted together. constitutes a rotation support portion 50 that rotatably connects the annular base portion 21 of the crown 20 and the outer peripheral portion 11 of the main body 10 (see FIG. 1). The annular projection 24 on the crown 20 side is formed with a slit 33b that forms a guide portion 33 in cooperation with a projection 33a formed on the outer cylinder wall 14 of the main body 10 . A first convex piece 35, which is a convex strip extending in the vertical direction and having an appropriate width in the radial direction, is formed on the outer peripheral surface of the cylindrical wall 21b. The first convex piece 35 functions as part of the positioning portion 30, the restricting portion 31, and the reverse rotation preventing portion 32, as described above.

A cylindrical wall body 22a is erected in the central part of the lid part 22, and a female thread 34b that constitutes a screw mechanism 34 in cooperation with the male thread 34a of the main body 10 is formed on the inner peripheral surface of the cylindrical wall body 22a. is formed. Both threads 34a, 34b have a thread cross-section that is biased toward the opposite side of the pushing or screwing direction to make overriding by pushing in easier than overriding by pulling out.

In the sealing device thus constructed, as shown in FIG. 1, the tubular wall 21a of the crown 20 is pushed into the outer tubular wall 14 of the main body 10 so as to cover the tubular wall 21a. As a result, the annular convex portion 24 of the cylindrical wall 21 a of the crown 20 is engaged with the annular convex portion 16 of the outer peripheral portion 11 of the main body 10 , and the internal thread 34 b of the cylindrical wall 22 a of the crown 20 is engaged with the main body 10 . It is forcibly screwed onto the male screw 34a of the bottomed cylindrical wall 12a. The fitting portion 13 of the main body 10 is fitted to the mouth portion 1a of the container body 1 before or after fitting the crown 20 to the main body 10 .

In this assembly operation, the main body 10 is covered with the crown 20, the crown 20 is rotated relative to the main body 10, and the slit 33b provided in one place of the annular projection 24 of the crown 20 and the main body When viewed from above, the convex portion 33a protruding upward from one of the annular convex portions 16 of 10 is aligned with the convex portion 33a. As a result, the convex portion 33a enters the slit 33b and the annular convex portion 16 and the annular convex portion 24 are brought into close contact (see FIG. 6A). That is, the crown 20 is positioned with respect to the main body 10 with respect to the rotational position by the guide portion 33 . Before the slit 33b and the convex portion 33a are aligned with each other when viewed from above, the annular convex portion 24 of the crown 20 is placed on the convex portion 33a of the main body 10 (FIG. 6). (b)). That is, by switching from the state before the slit 33b and the convex portion 33a are aligned to the state where they are aligned, the crown 20 is lowered relative to the main body 10 by the height of the convex portion 33a. Next, as shown in FIG. 6(a), the crown 20 is pressed against the main body 10 in a state in which positioning by the guide portion 33 is achieved. Then, the crown 20 sinks into the main body 10, and the annular protrusion 24 of the crown 20 climbs over the annular protrusion 16 of the main body 10 and descends to engage with each other (see FIG. 7). In other words, the annular convex portion 16 of the main body 10 and the annular convex portion 24 of the crown 20 function as the rotation support portion 50, and the crown 20 can be rotated with respect to the main body 10. is prevented from coming off. On the other hand, in parallel with sinking the crown 20 toward the main body 10 side, the female thread 34a of the crown 20 is forcibly lowered so as to climb over the male thread 34b of the main body 10, and both screws 34a and 34b are fixed. are screwed together at the position of

In this assembled state, the first convex piece 35 of the crown 20 is temporarily fixed (positioned) there by the positioning portion 30, as shown in FIG. 8(a). Therefore, the possibility that the crown 20 is erroneously rotated with respect to the main body 10 during transportation or the like can be significantly reduced, and the crown 20 is held quasi-stable with respect to the main body 10 .

When unsealing, the crown 20 is rotated with respect to the main body 10 in one direction, for example, counterclockwise when viewed from above, until the restricting portion 31 functions. Then, the inner plug 12 of the main body 10 is screwed into the lid portion 22 of the crown 20 by the screw mechanism 34, and the inner plug 12 is sheared from the outer peripheral portion 11 at the annular notch 17a as shown in FIG. It is held by the cylindrical wall member 22a of the crown member 20. As shown in FIG.

Along with this unsealing operation, the first convex piece 35 of the crown 20 climbs over the other second convex piece 30b on the counterclockwise rotation side and bends the tongue piece 32a to get over it, as shown in FIG. 8(b). As shown, it abuts against the third convex piece 31a of the main body 10 and stops rotating there. The first convex piece 35 that has reached this position is prevented from rotating in both directions between the third convex piece 31a and the tongue piece 32a. Then, as shown in FIG. 2 , when the lid portion 22 of the crown 20 is rotated with respect to the annular base portion 21 with the hinge 23 as a fulcrum, the inner plug 12 is also opened together with the lid portion 22 .

When the lid portion 22 of the crown 20 is again put on the annular base 21, the lip 15a of the main body 10 abuts against the inner surface of the ceiling wall 22b of the crown 20 to seal the upper opening of the main body 10. As shown in FIG.

In the sealing device 100 of the present embodiment, the crown body 20 is not only rotatably held by the main body 10 via the rotation support portion 50, but also held at the initial position before opening by the positioning portion 30. be. Therefore, it becomes difficult for the crown 20 to rotate with respect to the main body 10, and a phenomenon in which the inner plug 12 is inadvertently sheared at an unintended timing can be suppressed.

Although the sealing device according to the present embodiment has been described above, the sealing device according to the present invention is not limited to the above. For example, in the above embodiment, the convex pieces 30a, 30b, 31a and the tongue piece 32a are formed on the inner peripheral surface of the outer cylinder wall 14 of the main body 10, and the convex piece 35 that engages with them is formed on the cylinder of the crown body 20. The convex pieces 30a, 30b, 31a and the tongue piece 32a are formed on the outer peripheral surface of the cylindrical wall 21b of the crown 20, and the convex piece 35 engaged with them is formed on the outer peripheral surface of the cylindrical wall 21b. may be formed on the inner peripheral surface of the outer cylinder wall 14 of the main body 10 .

Further, as shown in FIG. 9, the second convex piece 30a, which is located on the clockwise rotation side and has a large amount of projection in the radial direction, is spaced circumferentially about the width of the first convex piece 35 to form a ratchet mechanism. A tongue 132a may be provided. In this case, the second convex piece 30b, which is on the counterclockwise rotation side shown in FIG. 8(a) and has a small amount of projection in the radial direction, is omitted, and the shape and arrangement of the tongue piece 32a are changed. The tongue piece 132a has a stopper function that allows rotation with a force greater than or equal to a predetermined force achieved by the other second convex piece 30b shown in FIG. 8(a) and the like.

Moreover, although the first convex piece 35 is shared as an element of the positioning portion 30, the restricting portion 31, and the reverse rotation prevention portion 32, it is also possible to form a dedicated convex piece for each of the portions 30, 31, and 32. can.

Further, in the above embodiment, the positioning portion 30, the restricting portion 31, and the reverse rotation prevention portion 32 are installed at two opposing locations, but the number of them may be one, or three or more.

The screws 34a and 34b of the screw mechanism 34 are preferably reverse threads so that the inner plug 12 is drawn into the lid portion 22 when the crown 20 is rotated in the opening direction, but the inner plug 12 is pushed out. It may be a normal thread like this.

Further, in the above embodiment, the cap is opened by turning the crown 20 counterclockwise when viewed from above, but the cap is opened by turning the crown 20 clockwise. You can also In this case, the positioning portion 30, the restricting portion 31, and the reverse rotation prevention portion 32 may be arranged in an arrangement opposite to that of the above embodiment.

Instead of forming the convex portion 33a above the annular convex portion 16 of the outer cylinder wall 14 provided on the main body 10 side, the cylindrical wall 21a provided on the crown 20 side or below the annular convex portion 24 of the annular base portion 21 is formed. In this case, the annular protrusion 16 is formed with a slit that enables positioning with the protrusion.

DESCRIPTION OF SYMBOLS 1... Container main body 1a... Mouth part 10... Main body 11... Peripheral part 12... Inner plug 12a... Bottomed cylindrical wall 13... Fitting part 13a... Cylindrical wall 13b... Cylindrical wall 13c... Annular wall , 13d... Swelling portion 14... Outer cylinder wall (first tubular part) 15... Inner cylinder wall 16... Annular protrusion 17... Connecting part 17a... Annular notch 20... Crown 21... Annular Base 21a Cylindrical wall (second cylindrical portion) 21b Cylindrical wall 22 Cover 22a Cylindrical wall 24 Annular projection 23 Hinge 24 Annular projection 30 Positioning part 30a... Second convex piece 30b... Second convex piece 31... Regulating part 31a... Third convex piece 32... Reverse rotation prevention part 32a... Tongue piece 33... Guide part 33a... Convex part 33b... Slit 34... Screw mechanism 34a... Male thread 34b... Female screw 35... First convex piece 50... Rotating support part

Claims (8)

a body attached to the mouth of the container body;
A sealing device comprising: a crown body having a cover arranged to cover the main body, an annular base supported by the main body, and a hinge connecting the cover to the annular base so as to be openable and closable. and
The main body and the annular base portion of the crown are rotatably connected by fitting between the first tubular portion provided on the main body and the second tubular portion provided on the annular base portion of the crown. has a rotating support part that
When unsealing, the screw mechanism provided between the main body and the lid separates the inner plug from the main body and captures it in the lid,
A positioning portion is provided between the main body and the annular base of the crown for temporarily fixing the crown by preventing rotation of the crown with respect to the main body in clockwise and counterclockwise directions,
A sealing device , further comprising: a restricting portion that prevents rotation of the crown with respect to the main body at a rotational position beyond a position where the inner plug is separated from the main body . The positioning portion has one first convex piece on one of a pair of opposing peripheral surfaces of the first tubular portion of the main body and the annular base portion of the crown, and the pair of The other peripheral surface has two second convex pieces sandwiching the first convex piece,
The amount of protrusion of at least one of the second convex pieces formed on the other peripheral surface is such that, in a state in which the second convex piece is engaged with the first convex piece, the amount of projection to the annular base of the main body is 2. The method according to claim 1, wherein the first convex piece or the second convex piece is bent by a forced turning force to allow the rotation of the annular base. sealing device. Of the two second convex pieces provided on the other peripheral surface, the other second convex piece prevents rotation of the first convex piece provided on the one peripheral surface. 3. The sealing device according to claim 2, wherein the stopper is configured to have a protrusion amount that is set so as to The rotation support portion has a first annular protrusion provided on the first tubular portion of the main body and a second annular protrusion provided on the second tubular portion of the annular base portion of the crown,
A projection provided on one of the first annular protrusion and the second annular protrusion, and a protrusion provided on the other of the first annular protrusion and the second annular protrusion and passing through the protrusion and the first annular projection and the second annular projection are positioned at a rotational position set by the positioning portion when the main body and the annular base of the crown are fitted together. 4. The sealing device according to any one of claims 1 to 3, further comprising a guide portion in which the protrusions are fitted into the slits before they ride over each other. 3. The restricting portion is a third projecting piece projecting from a predetermined position on each of the opposing peripheral surfaces of the first tubular portion of the main body and the annular base portion of the crown. The sealing device according to any one of 1 to 4 . Claims 1 to 3, characterized by further comprising a reverse rotation preventing portion that prevents rotation of the crown with respect to the main body in the closing direction at a predetermined position beyond the rotational position where the inner plug is separated from the main body. 6. The sealing device according to any one of 5 . 6. The anti-reverse part allows the crown to rotate with respect to the main body in the opening direction, and prevents the crown from rotating with respect to the main body in the closing direction. The sealing device according to . 8. The sealing device according to claim 7 , wherein the reverse rotation preventing portion is configured by a ratchet mechanism.

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