Embolism

Abstract

To provide a plug that can reduce the number of assembly parts compared to conventional plugs.SOLUTION: A plug 100 according to the present invention is a plug attached to a container 10 opening upward, including: a plug body 120 fitted into the opening of the container; a seal member attachment member 130 attached to the lower side of the plug body; and a seal member PK attached to the seal member attachment member, the seal member having a first sealing portion PK4, which seals between the container and the plug body, and second sealing portions PK1, PK2, PK3, PK5, PK6, which seal between the plug body and the seal member attachment member.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a stopper plug.

Background Art

[0002] In the past, there has been proposed "a lidded container, comprising: a container body provided with an opening at an upper portion thereof; and a lid body that opens and closes the opening, wherein the lid body includes: an outer lid detachably attached to an outer peripheral portion of the container body; an inner plug positioned inside the outer lid and fitted into the container body from the opening; a seal member positioned on an outer peripheral portion of the inner plug and sealing a gap between the container body and the inner plug; and a pressure adjusting portion positioned on a lower surface portion of the inner plug and adjusting pressure inside the container body, and the pressure adjusting portion includes: an elastic member provided with a degassing hole communicating with an inner side of the container body; and an abutting portion that closes the degassing hole in a state of abutting against one end side of the degassing hole." (see, for example, Japanese Unexamined Patent Application Publication No. 2019-077476).

Prior Art Literature

Patent Literature

[0003]

Patent Literature 1

Summary of the Invention

Problem to be Solved by the Invention

[0004] By the way, in the lid (stopper) of the container with a lid as described above, the first sealing member and the second sealing member are attached to the second stopper of the inner stopper, which is attached to the lower side of the first stopper of the inner stopper. The first sealing member seals the space between the container with a lid and the first stopper of the inner stopper, and the second sealing member seals the space between the first stopper of the inner stopper and the second stopper of the inner stopper. However, in the lid of the container with a lid as described above, it is necessary to assemble four assembly parts (i.e., the first stopper of the inner stopper, the second stopper of the inner stopper, the first sealing member, and the second sealing member). In such assembly sites, there are requests to reduce the number of assembly parts in order to simplify the assembly work as much as possible.

[0005] The object of the present invention is to provide a stopper that can reduce the number of assembly parts compared to conventional stoppers. [Means for solving the problem]

[0006] The stopper according to the present invention is A stopper that is fitted to a container that opens upwards, A stopper body that is fitted into the opening of the aforementioned container, A sealing member mounting member is attached to the lower part of the plug body, The system comprises a sealing member that is attached to the sealing member mounting member, The sealing member has a first sealing portion that seals the space between the container and the stopper body, and a second sealing portion that seals the space between the stopper body and the sealing member mounting member.

[0007] According to the above configuration, a single sealing member attached to the sealing member mounting member is sufficient to seal the gap between the container and the stopper body, and the gap between the stopper body and the sealing member mounting member. Therefore, this stopper body can have fewer assembly parts compared to conventional stopper bodies.

[0008] In this invention, The sealing member is fitted and attached to the sealing member mounting member. Preferably, the sealing member mounting member is attached to the plug body so as to sandwich the second sealing portion of the sealing member together with the plug body.

[0009] According to the above configuration, it is possible to prevent the user from easily removing the sealing member from the sealing member mounting member. Therefore, with this plug, the risk of losing the sealing member because it can be easily removed from the sealing member mounting member is reduced.

[0010] In this invention, In a side view, it is preferable that only the first sealing portion of the sealing member is exposed.

[0011] With the above configuration, the only part of the sealing member that requires maintenance (for example, washing to remove dirt) is the first sealing portion. Therefore, this stopper minimizes the effort required to maintain the sealing member.

[0012] In this invention, The plug body has a locking portion, The sealing member mounting member has a locking portion located above the locking portion, extending beyond the locking portion when locked to the locking portion, Preferably, the locking portion has an inclined surface that contacts the locked portion before it exceeds the locked portion.

[0013] According to the above configuration, by bringing the locked portion into contact with the inclined surface and sliding it along the inclined surface, it is possible to make it as easy as possible for the locked portion to move from below the locked portion to above the locked portion, and once the locked portion is locked to the locked portion, it is possible to prevent the locked state from being easily released. [Brief explanation of the drawing]

[0014] [Figure 1] This is a cross-sectional view of a beverage container according to an embodiment of the present invention, when cut across a plane including the cylindrical axis of the vacuum double-walled container. [Figure 2] It is an enlarged view of the upper end portion of the vacuum double container and the stopper shown in Fig. 1 [Figure 3] It is a bottom exploded perspective view of the stopper according to the embodiment of the present invention. [Figure 4] It is a view showing the dimensional relationship between the outer diameter of the upper flange portion of the annular packing attachment member according to the embodiment of the present invention and the inner diameter of the side wall portion of the annular packing in a natural state. MODE FOR CARRYING OUT THE INVENTION

[0015] <Configuration of Beverage Container According to Embodiment of the Present Invention> A beverage container 1 according to an embodiment of the present invention, as shown in Fig. 1 and Fig. 2, is mainly composed of a vacuum double container 10 and a stopper 100. The beverage container 1 is assembled by attaching the stopper 100 to the vacuum double container 10. Hereinafter, these constituent elements will be described in detail respectively.

[0016] 1. Vacuum double container The vacuum double container 10 is a container made of metal such as stainless steel, and as shown in Fig. 1 and Fig. 2, it opens upward and is mainly formed of a bottomed inner cylinder 11 and a bottomed outer cylinder 12. Specifically, after the upper end of the inner cylinder side wall 11A of the inner cylinder 11 and the upper end of the outer cylinder side wall 12A of the outer cylinder 12 are joined such that a heat insulating space is formed between the inner cylinder 11 and the outer cylinder 12, the heat insulating space is brought into a vacuum state, thereby forming the vacuum double container 10. The cylinder axis AX of the vacuum double container 10 is an imaginary line extending vertically from the center of the inner cylinder side wall 11A of the inner cylinder 11 (or the center of the outer cylinder side wall 12A of the outer cylinder 12) in a plan view (see Fig. 1 and Fig. 2).

[0017] As shown in FIGS. 1 and 2, the inner cylinder 11 is mainly formed of an inner cylinder side wall portion 11A, an inner cylinder bottom wall portion 11B, a female screw portion 11C and the like. The inner cylinder side wall portion 11A has a substantially cylindrical shape (see FIGS. 1 and 2). As shown in FIG. 1, the inner cylinder bottom wall portion 11B extends inward (toward the cylinder axis AX side of the vacuum double container 10) from the lower end of the inner cylinder side wall portion 11A, and the central portion bulges upward in a substantially hemispherical shape. As shown in FIGS. 1 and 2, the female screw portion 11C is formed on the inner peripheral surface of the upper end of the inner cylinder side wall portion 11A. This female screw portion 11C can be screwed with the male screw portion 123 of the plug main body 120 of the plug body 100 when the plug body 100 is attached to the vacuum double container 10 (see FIGS. 1 and 2).

[0018] As shown in FIGS. 1 and 2, the outer cylinder 12 is mainly formed of an outer cylinder side wall portion 12A, an outer cylinder bottom wall portion 12B and the like. The outer cylinder side wall portion 12A has a substantially cylindrical shape (see FIGS. 1 and 2). As shown in FIGS. 1 and 2, when the plug body 100 is attached to the vacuum double container 10, the side wall portion 111 of the lid body 110 of the plug body 100 is positioned around the upper end of the outer cylinder side wall portion 12A. The outer cylinder bottom wall portion 12B has a substantially disc shape, and is joined to the lower end of the outer cylinder side wall portion 12A as shown in FIG. 1.

[0019] 2. Plug body As shown in FIGS. 1 to 3, the plug body 100 is mainly composed of a lid body 110, a plug main body 120, an annular packing attachment member 130, an annular packing PK and the like. Hereinafter, each of these constituent elements will be described in detail.

[0020] (1) Lid body The lid body 110 is formed of resin or the like, and is disposed on the upper side of the plug main body 120 as shown in FIGS. 1 to 3, and is mainly formed of a side wall portion 111, a top wall portion 112 and the like. As shown in FIGS. 2 and 3, the side wall portion 111 has a substantially cylindrical shape. The top wall portion 112 has a substantially disc shape, and extends inward from the upper end of the side wall portion 111 as shown in FIGS. 2 and 3.

[0021] (2) Plug main body The stopper body 120 is made of resin or the like, and as shown in Figures 2 and 3, is mainly made up of a side wall portion 121, a bottom wall portion 122, and a male screw portion 123. The stopper body 120 is fitted into the opening of the vacuum double-walled container 10 (in other words, inside the inner side wall portion 11A of the inner cylinder 11) when the stopper body 100 is installed in the vacuum double-walled container 10, as shown in Figures 1 and 2. The side wall portion 121 has a substantially cylindrical shape, as shown in Figures 2 and 3. The upper end of the side wall portion 121 is joined to the lower surface of the top wall portion 112 of the lid 110 by ultrasonic welding or the like, thereby integrating the stopper body 120 and the lid 110. The bottom wall portion 122 has a substantially disc shape, as shown in Figures 2 and 3, and extends inward from the lower part of the side wall portion 121. As shown in Figures 2 and 3, a recessed area 122a is formed in the center of the bottom wall portion 122, with the recessed area facing upwards. Also, as shown in Figures 2 and 3, six insertion openings 122b are formed around the bottom wall portion 122a at equal intervals on the circumference, through which the extended wall portion 135 and locking portion 136 of the annular packing mounting member 130 are inserted. Furthermore, as shown in Figure 2, the edges of the insertion openings 122b in the bottom wall portion 122 have a lower inclined surface 122c that slopes inward as it moves upwards, and an upper inclined surface 122d that slopes outward as it moves upwards. The male screw portion 123 is formed on the outer circumferential surface of the side wall portion 121 from the lower end to the center in the vertical direction, as shown in Figures 2 and 3. This male threaded portion 123 can be screwed into the female threaded portion 11C of the inner cylinder 11 of the vacuum double-walled container 10 when the plug 100 is attached to the vacuum double-walled container 10 (see Figures 1 and 2).

[0022] (3) Annular packing mounting member The annular packing mounting member 130 is a member for mounting the annular packing PK, and is made of resin or the like. As shown in Figures 2 to 4, it is mainly made up of a side wall portion 131, a top wall portion 132, an upper flange portion 133, a lower flange portion 134, an extended wall portion 135, and a locking portion 136. The side wall portion 131 has a substantially cylindrical shape, as shown in Figures 2 to 4. The top wall portion 132 has a substantially disc shape, as shown in Figures 2 to 4, and extends inward from the upper end of the side wall portion 131. The upper flange portion 133 extends outward from the upper end of the side wall portion 131, as shown in Figures 2 to 4. The lower flange portion 134 extends outward from the lower end of the side wall portion 131, as shown in Figures 2 to 4. As shown in Figures 2 and 4, the outer circumferential surface 134a of the lower flange portion 134 is inclined outward as it extends downward. The extended wall portion 135 extends upward from six equally spaced locations on the circumference of the upper end of the side wall portion 131 (see Figures 2 to 4). The extended wall portion 135 is inserted into the insertion opening 122b of the bottom wall portion 122 of the plug body 120 when the annular packing mounting member 130 is attached to the lower side of the plug body 120. The locking portion 136 is formed at the upper end of the extended wall portion 135, as shown in Figures 2 to 4. As shown in Figure 2, the locking portion 136 is locked to the bottom wall portion 122 of the plug body 120, thereby attaching the annular packing mounting member 130 to the lower side of the plug body 120. As shown in Figures 2 and 4, the locking portion 136 has an upper inclined surface 136a that slopes outward as it goes downward, and a lower inclined surface 136b that slopes inward as it goes downward.

[0023] (4) Ring-shaped packing The annular packing PK is formed from an elastic material such as rubber or elastomer, and as shown in Figures 2 to 4, it is mainly composed of a side wall portion PK1, an upper annular wall portion PK2, a lower annular wall portion PK3, a lower sealing portion PK4, an upper annular projection portion PK5, and a lower annular projection portion PK6. The side wall portion PK1 has a substantially cylindrical shape (see Figures 2 and 4). As shown in Figures 2 and 4, the inner circumferential surface PK1a of the lower end of the side wall portion PK1 (the portion below the lower annular wall portion PK3) is inclined outward as it extends downward. The upper annular wall portion PK2 extends inward from the upper end of the side wall portion PK1, as shown in Figures 2 to 4, and has a substantially ring shape. The lower annular wall portion PK3 extends inward from the vertical center of the side wall portion PK1, as shown in Figures 2 to 4, and has a substantially ring shape. The lower annular wall portion PK3 extends inward more than the upper annular wall portion PK2, as shown in Figures 2 and 4. The lower sealing portion PK4 extends outward from the lower end of the side wall portion PK1 and then diagonally downward on the cylindrical axis side of the annular packing PK (i.e., on the imaginary line side extending vertically from the center of the annular packing PK in a plan view), as shown in Figures 2 to 4, and has a substantially annular shape. The lower sealing portion PK4 plays a role in sealing the space between the inner cylinder side wall portion 11A of the inner cylinder 11 of the vacuum double-walled container 10 and the plug body 120 when the plug body 100 is installed in the vacuum double-walled container 10, as shown in Figure 2. The upper annular projection portion PK5 is formed on the outer peripheral surface side of the upper end of the side wall portion PK1, as shown in Figures 2 to 4, and has a substantially annular shape. The length of the upper annular projection PK5 from its inner end to its outer end is adjusted so that the upper annular projection PK5 does not come into contact with the lower annular projection PK6 when the upper annular projection PK5 and the lower annular projection PK6 are deformed and their outer ends are facing downward, as shown in Figure 2. The lower annular projection PK6 is formed on the outer circumferential surface side of the vertically central part of the side wall PK1, as shown in Figures 2 to 4, and has a roughly annular shape. The length of the lower annular projection PK6 from its inner end to its outer end is adjusted so that the lower annular projection PK6 does not come into contact with the part of the side wall PK1 that extends slightly outward when the lower annular projection PK6 is deformed and its outer end is facing downward, as shown in Figure 2.

[0024] Here, the assembly method of the plug body 120, the annular packing mounting member 130, and the annular packing PK will be described. First, the annular packing PK is attached to the annular packing mounting member 130. More specifically, the lower annular wall portion PK3 of the annular packing PK is fitted into the recess formed by the side wall portion 131, the upper flange portion 133, and the lower flange portion 134 of the annular packing mounting member 130, and the upper flange portion 133 of the annular packing mounting member 130 is fitted into the recess formed by the side wall portion PK1, the upper annular wall portion PK2, and the lower annular wall portion PK3 of the annular packing PK, so that the annular packing PK is fitted and attached to the annular packing mounting member 130 (see Figure 2). At this time, the outer peripheral surface 134a of the lower flange portion 134 is in contact with the inner peripheral surface PK1a of the lower end of the side wall portion PK1 of the annular packing PK (see Figure 2). Next, the annular packing mounting member 130, to which the annular packing PK is attached, is attached to the lower side of the plug body 120. More specifically, the extended wall portion 135 and the locking portion 136 of the annular packing mounting member 130 are inserted from the bottom to the top into the insertion opening 122b of the bottom wall portion 122 of the plug body 120. As a result, the state in which the locking portion 136 of the annular packing mounting member 130 is positioned below the bottom wall portion 122 of the plug body 120 and the upper inclined surface 136a of the locking portion 136 of the annular packing mounting member 130 is in contact with the lower inclined surface 122c of the bottom wall portion 122 of the plug body 120 changes to a state in which the locking portion 136 of the annular packing mounting member 130 extends beyond the bottom wall portion 122 of the plug body 120 and is positioned above the bottom wall portion 122 of the plug body 120 and the lower inclined surface 136b of the locking portion 136 of the annular packing mounting member 130 is in contact with the upper inclined surface 122d of the bottom wall portion 122 of the plug body 120 (see Figure 2). Furthermore, until the locking portion 136 of the annular packing mounting member 130 exceeds the bottom wall portion 122 of the plug body 120, the lower inclined surface 122c of the bottom wall portion 122 of the plug body 120 will contact the upper inclined surface 136a of the locking portion 136 of the annular packing mounting member 130 and slide along the upper inclined surface 136a of the locking portion 136 of the annular packing mounting member 130. Finally, the locking portion 136 of the annular packing mounting member 130 will be locked to the bottom wall portion 122 of the plug body 120, and the annular packing mounting member 130 will be attached to the underside of the plug body 120.Furthermore, when the annular packing mounting member 130, to which the annular packing PK is attached, is attached to the lower side of the stopper body 120, the upper annular projection PK5 and the lower annular projection PK6 of the annular packing PK deform so that their outer ends face downward (see Figure 2). When the stopper body 120, the annular packing mounting member 130, and the annular packing PK are assembled as described above, as shown in Figure 2, the side wall portion PK1, the upper annular wall portion PK2, the lower annular wall portion PK3, the upper annular projection PK5, and the lower annular projection PK6 of the annular packing PK are sandwiched between the stopper body 120 and the annular packing mounting member 130 so that only the lower sealing portion PK4 of the annular packing PK is exposed in a side view. At this time, the side wall portion PK1, the upper annular wall portion PK2, the lower annular wall portion PK3, the upper annular projection portion PK5, and the lower annular projection portion PK6 of the annular packing PK serve to seal the space between the plug body 120 and the annular packing mounting member 130.

[0025] As shown in Figure 4, before the annular packing PK is attached to the annular packing mounting member 130, the outer diameter L1 of the upper flange portion 133 of the annular packing mounting member 130 is larger than the inner diameter L2 of the side wall portion PK1 of the annular packing PK in its natural state (when the annular packing PK is not expanded or contracted). However, since the annular packing PK is made of an elastic material, by stretching the annular packing PK, the upper flange portion 133 of the annular packing mounting member 130 can be fitted into the recess formed by the side wall portion PK1, the upper annular wall portion PK2, and the lower annular wall portion PK3 of the annular packing PK, thereby attaching the annular packing PK to the annular packing mounting member 130. Furthermore, since the annular packing PK tends to return to its natural state after being attached to the annular packing mounting member 130, the sealing performance at the point where the annular packing PK and the annular packing mounting member 130 come into contact can be improved compared to the case where the outer diameter L1 of the upper flange portion 133 of the annular packing mounting member 130 is the same as the inner diameter L2 of the side wall portion PK1 of the annular packing PK in its natural state.

[0026] Once the stopper body 120, the annular packing mounting member 130, and the annular packing PK are assembled, it becomes difficult to easily release the locking portion 136 from the bottom wall portion 122 of the stopper body 120 (for example, it becomes impossible to release the locking by simply grasping the stopper body 120 with one hand and the annular packing mounting member 130 with the other hand and pulling). To release the locking portion 136 from the bottom wall portion 122 of the stopper body 120, one could, for example, insert a flathead screwdriver between the lower end of the side wall portion 121 of the stopper body 120 and the lower flange portion 134 of the annular packing mounting member 130, reach the tip of the flathead screwdriver into the recess formed by the side wall portion 131, upper flange portion 133, and lower flange portion 134 of the annular packing mounting member 130, and then use the principle of leverage, although this would damage the annular packing PK. In this plug body 100, the locking portion 136 can be released from its locking position on the bottom wall portion 122 of the plug body 120, albeit not easily, allowing the individual components of the plug body 100 to be separated by material for disposal or recycling.

[0027] <Features of the plug body according to the embodiment of the present invention> (1) In the plug body 100 according to an embodiment of the present invention, the lower sealing portion PK4 of the annular packing PK seals the space between the inner cylinder side wall portion 11A of the inner cylinder 11 of the vacuum double-walled container 10 and the plug body 120, while the side wall portion PK1, upper annular wall portion PK2, lower annular wall portion PK3, upper annular projection portion PK5, and lower annular projection portion PK6 of the annular packing PK seal the space between the plug body 120 and the annular packing mounting member 130. Therefore, in this plug body 100, a single annular packing PK can seal the space between the inner cylinder side wall portion 11A of the inner cylinder 11 of the vacuum double-walled container 10 and the plug body 120, and the space between the plug body 120 and the annular packing mounting member 130. Consequently, this plug body 100 can reduce the number of assembly parts compared to conventional plug bodies that use two sealing members.

[0028] (2) In the plug body 100 according to an embodiment of the present invention, the lower annular wall portion PK3 of the annular packing PK is fitted into a recess formed by the side wall portion 131, upper flange portion 133, and lower flange portion 134 of the annular packing mounting member 130, and the upper flange portion 133 of the annular packing mounting member 130 is fitted into a recess formed by the side wall portion PK1, upper annular wall portion PK2, and lower annular wall portion PK3 of the annular packing PK, thereby fitting and attaching the annular packing PK to the annular packing mounting member 130. Furthermore, when the annular packing mounting member 130 with the annular packing PK attached is attached to the lower side of the plug body 120, the side wall portion PK1, upper annular wall portion PK2, lower annular wall portion PK3, upper annular projection portion PK5, and lower annular projection portion PK6 of the annular packing PK are sandwiched between the plug body 120 and the annular packing mounting member 130. Therefore, this plug 100 makes it difficult for the user to easily remove the annular packing PK from the annular packing mounting member 130. Consequently, this plug 100 reduces the risk of losing the annular packing PK because it can be easily removed from the annular packing mounting member 130.

[0029] (3) In the plug body 100 according to an embodiment of the present invention, when the plug body 120, the annular packing mounting member 130, and the annular packing PK are assembled, only the lower sealing portion PK4 of the annular packing PK is exposed in a side view. Therefore, in this plug body 100, the part of the annular packing PK that requires maintenance (for example, washing to remove dirt) is limited to only the lower sealing portion PK4. Thus, in this plug body 100, the effort required to maintain the annular packing PK can be minimized.

[0030] (4) In the plug body 100 according to an embodiment of the present invention, the locking portion 136 of the annular packing mounting member 130 is located above the bottom wall portion 122 of the plug body 120, extending beyond the bottom wall portion 122 of the plug body 120, when locked to the bottom wall portion 122 of the plug body 120. Furthermore, the locking portion 136 of the annular packing mounting member 130 has an upper inclined surface 136a that contacts the lower inclined surface 122c of the bottom wall portion 122 of the plug body 120 before extending beyond the bottom wall portion 122 of the plug body 120. Therefore, in this plug body 100, the lower inclined surface 122c of the bottom wall portion 122 of the plug body 120 slides on the upper inclined surface 136a of the locking portion 136 of the annular packing mounting member 130, making it as easy as possible for the locking portion 136 of the annular packing mounting member 130 to move from below the bottom wall portion 122 of the plug body 120 to above the bottom wall portion 122 of the plug body 120, and preventing the locking state from being easily released once the locking portion 136 of the annular packing mounting member 130 is locked to the bottom wall portion 122 of the plug body 120.

[0031] <Variation> (A) In the plug body 100 according to the previous embodiment, when the annular packing mounting member 130 to which the annular packing PK is attached is attached to the lower side of the plug body 120, the side wall portion PK1, the upper annular wall portion PK2, the lower annular wall portion PK3, the upper annular projection portion PK5, and the lower annular projection portion PK6 of the annular packing PK are sandwiched between the plug body 120 and the annular packing mounting member 130. However, even when the annular packing mounting member 130 to which the annular packing PK is attached is attached to the lower side of the plug body 120, the side wall portion PK1, the upper annular wall portion PK2, the lower annular wall portion PK3, the upper annular projection portion PK5, and the lower annular projection portion PK6 of the annular packing PK are not all sandwiched between the plug body 120 and the annular packing mounting member 130.

[0032] (B) In the plug body 100 according to the previous embodiment, when the plug body 120, the annular packing mounting member 130, and the annular packing PK are assembled, only the lower sealing portion PK4 of the annular packing PK is exposed in a side view. However, other parts of the annular packing PK besides the lower sealing portion PK4 may also be exposed in a side view.

[0033] (C) In the plug body 100 according to the previous embodiment, the locking portion 136 of the annular packing mounting member 130 was positioned above the bottom wall portion 122 of the plug body 120, beyond the bottom wall portion 122 of the plug body 120, and locked to the bottom wall portion 122 of the plug body 120, thereby attaching the annular packing mounting member 130 to the underside of the plug body 120. However, the method of attaching the annular packing mounting member 130 to the underside of the plug body 120 is not limited to this. For example, the annular packing mounting member 130 may be attached to the underside of the plug body 120 by screw fastening. Also, in the plug body 100 according to the previous embodiment, an upper inclined surface 136a that slopes outward as it goes downward was formed on the locking portion 136 of the annular packing mounting member 130. However, the upper inclined surface 136a does not have to be formed on the locking portion 136 of the annular packing mounting member 130.

[0034] (D) In the plug body 100 according to the previous embodiment, a lower inclined surface 122c that slopes inward as it goes upward, and an upper inclined surface 122d that slopes outward as it goes upward were formed on the bottom wall portion 122 of the plug body 120. However, the lower inclined surface 122c and the upper inclined surface 122d do not have to be formed on the bottom wall portion 122 of the plug body 120, or either the lower inclined surface 122c or the upper inclined surface 122d may be formed on the bottom wall portion 122 of the plug body 120. Also, in the plug body 100 according to the previous embodiment, a lower inclined surface 136b that slopes inward as it goes downward was formed on the locking portion 136 of the annular packing mounting member 130. However, the lower inclined surface 136b does not have to be formed on the locking portion 136 of the annular packing mounting member 130.

[0035] (E) In the plug body 100 according to the previous embodiment, the outer circumferential surface 134a of the lower flange portion 134 of the annular packing mounting member 130 was inclined outward as it went downward, and the inner circumferential surface PK1a of the lower end of the side wall portion PK1 of the annular packing PK was inclined outward as it went downward. However, the outer circumferential surface 134a of the lower flange portion 134 of the annular packing mounting member 130 and the inner circumferential surface PK1a of the lower end of the side wall portion PK1 of the annular packing PK do not need to be inclined (in other words, they only need to be aligned in the vertical direction).

[0036] (F) In the plug body 100 according to the previous embodiment, six insertion openings 122b were formed at equal intervals around the circumference of the bottom wall portion 122 of the plug body 120. However, the number of insertion openings 122b is not limited to six; it may be 1 to 5, or 7 or more. If there is only one insertion opening 122b, it may be formed around the entire circumference of the recess 122a in the bottom wall portion 122 of the plug body 120. Furthermore, the insertion openings 122b do not have to be formed around the circumference of the bottom wall portion 122 of the plug body 120, nor do they have to be formed at equal intervals. Furthermore, when the annular packing mounting member 130 is attached to the lower side of the plug body 120, it is preferable to adjust the number and position of the extended wall portion 135 of the annular packing mounting member 130 according to the number and position of the insertion openings 122b, so that the extended wall portion 135 of the annular packing mounting member 130 can pass through the insertion openings 122b.

[0037] (G) In the plug 100 according to the previous embodiment, a cover 110 was provided on the plug 100, but the plug 100 does not necessarily need to have a cover 110.

[0038] (H) In the plug 100 according to the previous embodiment, the lower annular wall portion PK3 of the annular packing PK extended inward more than the upper annular wall portion PK2 of the annular packing PK. However, the upper annular wall portion PK2 of the annular packing PK may extend inward more than the lower annular wall portion PK3 of the annular packing PK. Also, the distance from the inner end of the lower annular wall portion PK3 of the annular packing PK to the cylindrical axis AX of the vacuum double container 10 may be the same as the distance from the inner end of the upper annular wall portion PK2 of the annular packing PK to the cylindrical axis AX of the vacuum double container 10.

[0039] (I) In the plug body 100 according to the previous embodiment, the length from the inner end to the outer end of the upper annular projection PK5 was adjusted so that the upper annular projection PK5 would not come into contact with the lower annular projection PK6 when the upper annular projection PK5 and the lower annular projection PK6 were deformed and their outer ends were facing downwards. However, the length from the inner end to the outer end of the upper annular projection PK5 of the annular packing PK may be adjusted so that the upper annular projection PK5 comes into contact with the lower annular projection PK6 at that time. Also, in the plug body 100 according to the previous embodiment, the length from the inner end to the outer end of the lower annular projection PK6 was adjusted so that the lower annular projection PK6 would not come into contact with the portion of the side wall PK1 that extends slightly outward when the lower annular projection PK6 was deformed and its outer end was facing downwards. However, the length from the inner end to the outer end of the lower annular projection PK6 may be adjusted so that the lower annular projection PK6 comes into contact with the portion of the side wall PK1 that extends slightly outward at that time.

[0040] The above modifications may be applied individually or in combination. [Explanation of Symbols]

[0041] 10 Vacuum double container (container) 100 Plug body 120 stopper body 122 Bottom wall part (locked part) 130 Annular packing mounting member (sealing member mounting member) 136 Locking part 136a Upper slope (slope) PK annular packing (sealing material) PK1 side wall section (second seal section) PK2 Upper annular wall portion (second seal portion) PK3 Lower annular wall section (second seal section) PK4 Lower seal section (first seal section) PK5 Upper annular projection (second seal portion) PK6 Lower annular projection (second seal portion)

Claims

1. A stopper that is fitted to a container that opens upwards, A stopper body that is fitted into the opening of the aforementioned container, A sealing member mounting member is attached to the lower part of the plug body, The system comprises a sealing member that is attached to the sealing member mounting member, The plug body has a locking portion, The sealing member has a first sealing portion that seals the space between the container and the stopper body, and a second sealing portion that seals the space between the stopper body and the sealing member mounting member, and is fitted and attached to the sealing member mounting member. The sealing member mounting member has a locking portion located above the locking portion, extending beyond the locking portion when locked to the locking portion, and is attached to the plug body together with the plug body so as to sandwich the second sealing portion of the sealing member. The locking portion has an inclined surface that contacts the locked portion before it extends beyond it. Plug body.

2. In a side view, only the first sealing portion of the sealing member is exposed. The stopper according to claim 1.

Images