WO2018105709A1

WO2018105709A1 - Container cap

Info

Publication number: WO2018105709A1
Application number: PCT/JP2017/044095
Authority: WO
Inventors: 渡辺健二; 高宮聡磨; 磯貝孝光; 岩水敬太
Original assignee: 東罐興業株式会社
Priority date: 2016-12-09
Filing date: 2017-12-07
Publication date: 2018-06-14
Also published as: CN110023200B; CN110023200A; JP6357605B1; JPWO2018105709A1

Abstract

Provided is a container cap configured so that, even if an impact is applied to an upper cap, the separation between the separation section of an intermediate plug and a body section can be reliably prevented. A container cap 1 is provided with an intermediate plug 2 and an upper cap 3. A holding section 3h for holding a separation section 4 provided to the intermediate plug 2 has an annular protrusion 8 extending downward from the lower surface of the upper end wall 3b of the upper cap 3 and holding around the upper section 4u of the separation section 4 after the separation section 4 is separated from the intermediate plug 2. The intermediate plug 2 has a body section 20 interconnected at an opening OP with the separation section 4 and engaged with a container body 50. The separation section 4 has a plurality of protrusions 4p provided along the outer periphery of the upper section 4u and protruding individually sideways. The protrusions 4p are plate-like sections thin in the direction of an axis AX and have flexibility which enables the protrusions 4p to deform in the direction of the axis AX.

Description

Cap for container

The present invention relates to a container cap provided at the mouth of a bottle-shaped container.

As a known cap used for a container with a lid, it is provided with an inner stopper and an upper lid, and in the inner stopper, a main body side cylindrical portion fitted to the opening of the bottle is connected to the upper end via a score. In some cases, the upper lid is provided with an annular protrusion that can hold the peripheral edge of the flange of the separation portion by engagement (see Patent Documents 1 and 2). In the cap of Patent Document 1, an annular projecting portion is divided by a slit to form a plurality of projecting elements. By facilitating the deformation of the projecting portion or projecting element, an impact caused by dropping or the like passes from the upper lid through the projecting portion. Therefore, it is possible to prevent the score connecting the main plug body and the separating portion from being damaged. Moreover, in the cap of patent document 2, even if it is a case where the impact absorption part which consists of two annular grooves is provided in the corner | angular part which connects the upper end wall and side wall of an upper cover, and an impact is added to an upper cover, the influence Is prevented from reaching other parts of the top lid and the inner plug.

In the cap described in Patent Document 1, the projecting element is deformed by dividing the projecting portion holding the inner plug with a slit, but it is not easy to ensure the ease of deformation while maintaining the strength of the projecting element. It is not always easy to reliably prevent score damage. Specifically, at a position opposite to the position where the impact occurred, the flange is pulled up by the nail, and the score is likely to be damaged. Even with the cap described in Patent Document 2, it is not always easy to reliably prevent score damage.

Japanese Unexamined Patent Publication No. 2014-69809 JP 2014-69810 A

Accordingly, an object of the present invention is to provide a cap for a container that can reliably avoid separation of the inner plug separation portion and the main body portion even when an impact is applied to the upper lid.

In order to solve the above problems, a cap for a container according to the present invention forms a sealed space for enclosing contents together with a container body, and has an inner plug having a separation part for forming an opening in the sealed space; A cap of a container having a holding portion for holding the separating portion, the holding portion extending downward from the lower surface of the upper end wall of the upper lid, and the upper portion of the separating portion after separation of the separating portion from the inner plug The inner plug has a main body portion that is connected to the separation portion at the opening and is locked to the container main body, and the separation portion extends along the outer periphery of the upper portion. It has a plurality of protrusions that are provided and protrude laterally, and the protrusions are thin plates in the axial direction and have flexibility to deform in the axial direction.

The cap has a plurality of thin plate-like projections that are provided along the outer periphery of the upper part and project laterally, and the projections have flexibility to deform in the axial direction. The upper part of the separation part can be held by the annular protrusion of the upper lid using the part. Furthermore, since the upper part of the separation part is held by the annular protrusion of the upper lid, even if an impact is applied to the upper lid and the upper lid is deformed thereby, the plurality of protrusions become an elastically deformable cushioning material, and the annular protrusion Since the displacement of the upper part of the separating part relative to the part is allowed with a relatively high degree of freedom, the impact transmitted to the separating part of the inner plug via the annular protrusion is reduced. Thereby, it can prevent reliably that the connection part of a isolation | separation part and a main body side cylindrical part is damaged by impacts, such as dropping.

Further, according to a specific aspect of the present invention, in the container cap, the plurality of protrusions are arranged at substantially equal intervals along the outer periphery of the upper portion and have substantially the same width in the circumferential direction. In this case, it becomes easy to balance the holding of the upper portion of the separation portion by the annular protrusion of the upper lid through the plurality of protrusions.

Further, according to another aspect of the present invention, the protrusion is held in the annular protrusion in a bent state. In this case, the protruding portion is held in the annular protruding portion in a tensioned state, and the upper portion of the separating portion is stably held by the annular protruding portion of the upper lid.

Further, according to still another aspect of the present invention, the protrusion is thinner on the tip side than on the root side. In this case, the protrusion is easily curved on the tip side, and the upper portion of the separation portion can be easily held by the annular protrusion of the upper lid.

Further, according to still another aspect of the present invention, the annular protrusion has a claw for receiving the tips of the plurality of protrusions at the lower end. In this case, the tips of the plurality of protrusions can be fixed to the annular protrusion of the upper lid with a simple structure.

Further, according to still another aspect of the present invention, the protrusion extends substantially along a plane perpendicular to the axial direction. In this case, the plurality of protrusions are relatively easy to bend in the axial direction, and the displacement of the upper portion of the separation portion in the annular protrusion is relatively easy.

Further, according to still another aspect of the present invention, the protrusion is inclined downward from the root side toward the tip side. In this case, it is possible to give directionality to the ease of bending of the protruding portion, specifically, the protruding portion can be bent downward, and the upper portion of the separating portion can be held by the annular protruding portion of the upper lid. It becomes easy and it can prevent reliably that the upper part of a separation part slips out from an annular projection part.

According to still another aspect of the present invention, the upper lid has a screwing portion that can be attached to and detached from the container body side by a rotating operation, and presses the separating portion by the rotating operation of the screwing portion. The separation part is separated from the inner plug to form an opening.

According to still another aspect of the present invention, the main body portion has a main body side cylindrical portion that defines an opening, and the separation portion has an inner diameter side and an outer diameter side with respect to the main body side cylindrical portion. The separation portion side cylindrical portion is arranged so as to be offset to any one of the above.

Further, according to still another aspect of the present invention, the separation portion side cylindrical portion is offset to the inner diameter side with respect to the main body side cylindrical portion, and the annular root portion supporting the plurality of protrusions is It has a level | step difference contact | abutted with the inner surface and upper end of a main body side cylindrical part. In this case, when opening or closing the upper lid after opening, that is, when the upper lid is opened and closed, the annular root portion of the separated separation portion can be fitted and brought into close contact with the cylindrical portion on the main body side. Improved sealing performance after opening). Moreover, it can prevent reliably that a isolation | separation part will enter into a main body side cylindrical part and a container after isolation | separation.

Further, according to still another aspect of the present invention, the upper lid and the inner plug are coupled to each other by screwing. In this case, since the upper lid and the inner stopper can be assembled in advance in a process separate from the container body, the production process can be rationalized. When the upper lid is screwed to the inner plug, there is a tendency for the upper lid to be unstable due to the influence of the material of the inner plug and the like, and the significance of the plurality of protrusions for impact reduction is increased.

It is a disassembled perspective view of the cap for containers which is one Embodiment of this invention. 2a and 2b show the cap plug, FIG. 2a is a plan view, FIG. 2b is a longitudinal sectional view, and FIG. 2c is a bottom view. FIG. 3A is a plan view of the separating portion of the inner plug, and FIG. 3B is a partially enlarged side sectional view of the separating portion of the inner plug. 4a and 4b show an upper lid of the container cap of FIG. 1, FIG. 4a is a longitudinal sectional view, and FIG. 4b is a bottom view. It is the longitudinal cross-sectional view which showed the state before assembling | attaching the upper cover and inner stopper of a cap. It is the longitudinal cross-sectional view which showed the state which assembled | attached the upper cover and inner stopper of the cap. It is the longitudinal cross-sectional view which showed the state assembled | attached to the opening part of the container main body. It is the longitudinal cross-sectional view which showed the cap opening operation | movement of a cap. It is the longitudinal cross-sectional view which showed the state which excluded the upper cover after opening. It is the longitudinal cross-sectional view which showed the state which removed the upper cover in the state which isolate | separated the isolation | separation part of the cap of the cap. It is a partial expanded side sectional view explaining the holding | maintenance state of the isolation | separation part by a holding | maintenance part. 12a and 12b are diagrams for explaining modifications of the container cap shown in FIG.

Hereinafter, specific embodiments of the container cap according to the present invention will be described with reference to the drawings.

As shown in FIG. 1, the cap 1 includes an inner stopper 2 attached to the mouth portion 50a of the container body 50 that is a bottle, and an upper lid 3 attached to the inner stopper 2 so as to cover the inner stopper 2. . The cap 1 and the container main body 50 are a container 100 with a lid for storing and storing a liquid.

As shown in FIGS. 2a to 2c, the inner plug 2 is an integrally molded product made of resin, and includes a separation part 4, a fitting part 5, and a main body side cylindrical part 6. Here, the fitting part 5 and the main body side cylindrical part 6 constitute a main body part 20 of the inner plug 2.

As shown in FIG. 2 b, the separation portion 4 of the inner plug 2 has a separation portion side cylindrical portion 4 a that is offset to the inner diameter side by the thickness of the main body side cylindrical portion 6 with respect to the main body side cylindrical portion 6. I have. At the upper end of the separation portion side tubular portion 4a, a ceiling wall 4b that closes the separation portion side tubular portion 4a at the upper portion 4u of the separation portion 4 is provided along the outer periphery of the upper portion 4u. A plurality of projections 4p projecting outward are provided. Each protrusion 4p is a thin plate-like member in the axis AX direction of the inner plug 2 parallel to the upper and lower AB directions, and has flexibility to deform in the axis AX direction on the tip side. On the other hand, the lower end of the separation portion side cylindrical portion 4a is connected to the upper end of the main body side cylindrical portion 6 by a score 7 which is a thin connecting portion, as shown in an enlarged view in FIG. 2b.

As shown in FIG. 3a, the separation part 4 is provided with a total of eight plate-like protrusions 4p, and each protrusion 4p has the same shape. The plurality of protrusions 4p are arranged at equal intervals d along the outer periphery of the upper portion 4u, and have substantially the same width W in the circumferential direction. In the illustrated example, the circumferential distance d of the protrusion 4p and the circumferential width W of the protrusion 4p are substantially equal with the base side of the protrusion 4p as a reference. The number of the protrusions 4p and the width and interval of the protrusions 4p are not limited to the example shown in the figure, but the annular protrusions 8 of the upper lid 3 (see FIG. 1) can be obtained by aligning the widths and intervals of the protrusions 4p. This makes it easier to balance the holding of the upper part 4u of the separation part 4.

As shown in FIG. 3b, the protrusion 4p extends substantially along a plane perpendicular to the axis AX parallel to the upper and lower AB directions. Thereby, the plurality of protrusions 4p are relatively easily bent in the direction of the axis AX, and the displacement of the upper portion 4u of the separation portion 4 in the annular protrusion 8 (see FIG. 1) is relatively easy. The protrusion 4p is thinner on the tip side than on the root side. By thinning the protrusion 4p on the distal end side, the protrusion 4p is easily curved on the distal end side, and the upper portion 4u of the separation portion 4 can be easily held by the annular protrusion 8 of the upper lid 3. Here, the lower surface 4i of the protrusion 4p extends horizontally and is parallel to a plane perpendicular to the axis AX. On the other hand, the upper surface 4j of the protrusion 4p is lowered outward in the radial direction. As a result, the entire protrusion 4p is slightly inclined downward from the root side toward the tip side. Thus, by slightly lowering the protruding portion 4p toward the tip side, it is possible to give directionality to the ease of bending of the protruding portion 4p, and the upper portion 4u of the separating portion 4 is attached to the annular protruding portion 8 of the upper lid 3. It becomes easy to insert and hold, and it is possible to reliably prevent the upper portion 4u of the separating portion 4 from coming out of the annular protruding portion 8.

The tip 4e of the protrusion 4p is arcuate in plan view and has a curvature substantially equal to the curvature of the inner peripheral surface 8a of the annular protrusion 8. In FIG. 3a, the tip 4e appears to be a straight line, but is actually arcuate. In addition, the diameter of the circumscribed circle in contact with all the protruding portions 4p is slightly larger than the diameter of the inner peripheral surface 8a (see FIG. 4a) of the annular protruding portion 8.

An annular root portion 4z that supports the plurality of protrusions 4p and is thicker than the protrusions 4p is formed on the upper part 4u of the separation part 4. The annular root portion 4z has a step 4x that contacts the inner surface 6s and the upper end 6t of the upper portion 6u of the main body side cylindrical portion 6 shown in FIG. 2b. Thus, by providing the annular base portion 4z, the step 4x of the separating portion 4 can be brought into close contact with the inner surface 6s and the upper end 6t of the main body side cylindrical portion 6 when the upper lid 3 is closed after opening. The sealing performance between the main body side cylindrical portion 6 and the separation portion 4 when the upper lid 3 is mounted after the first opening is increased. Further, since the step 4x and the upper end 6t are in close contact with each other, the separation portion 4 can be reliably prevented from entering the main body side tubular portion 6 after separation.

As shown in FIG. 2b, the fitting portion 5 of the inner plug 2 is in close contact with the outer cylinder portion 5a fixed in close contact with the outer peripheral wall of the mouth portion 50a of the container body 50 and the inner peripheral wall of the mouth portion 50a. The inner cylinder part 5b to be fixed and the horizontal part 5c that is in close contact with the mouth part 50a and connects the outer cylinder part 5a and the inner cylinder part 5b are configured. Among these, as shown in the enlarged view of FIG. 2c, the outer cylinder portion 5a is formed with a large number of protrusions 5d over the entire inner peripheral surface of the outer cylinder portion 5a. The protrusion 5d is fitted into the annular recess 50c of the mouth portion 50a of the container body 50 to firmly bond the inner plug 2 and the container body 50.

The fitting part 5 of the inner plug 2 has a cylindrical part 5e at the top. And the external thread 5f which is a screwing part is formed in the outer peripheral surface of the cylindrical part 5e. The male screw 5f is screwed into a female screw of the upper lid 3 described later. A plurality (four in the embodiment) of ribs 5g are formed on the inner peripheral surface of the cylindrical portion 5e at equal intervals in the circumferential direction. The rib 5g reinforces the cylindrical portion 5e.

The main body side cylindrical portion 6 of the inner plug 2 is formed in a conical cylindrical shape as a whole, has a lip 6a whose diameter increases upward at the end, and is used for pouring the liquid in the container main body 50. Improve cutting.

The inner plug 2 forms an airtight or liquid tightly sealed space together with the container body 50 by a stopper. The separating part 4 of the inner plug 2 is cut off at the time of opening of the inner plug 2 at the score (connection part) 7 shown in FIG. 9).

The upper lid 3 is an integrally molded product made of resin and includes a curved side wall 3a and a flat upper end wall (ceiling wall) 3b as shown in FIGS. 4a and 4b. The side wall 3a and the upper end wall 3b form a dome-like appearance and cover the inner plug 2 to protect it from the external environment such as dust and moisture. The side wall 3a is formed with a cylindrical portion 3c extending from the upper surface of the inner surface in parallel with the axis AX of the upper lid 3 (rotating shaft extending in the up and down AB direction) and extending downward, and on the inner peripheral surface of the cylindrical portion 3c, A female screw 3d that is screwed into the male screw 5f of the inner plug 2 is formed as a screwing portion. In addition, a plurality of (eight in the embodiment) ribs 3e extending downward in parallel with the axis AX are formed on the outer peripheral surface of the cylindrical portion 3c at equal intervals in the circumferential direction. The rib 3e reinforces the cylindrical portion 3c. Further, a knurl 3f is formed on the lower outer peripheral surface of the side wall 3a. The knurled 3f has a function of preventing slipping when the upper lid 3 is rotated in the circumferential direction.

The upper lid 3 includes an annular projecting portion 8 extending downward on the lower surface of the upper end wall 3b as a holding portion 3h for holding the separation portion 4. As shown in an enlarged view in FIG. 11, the inner peripheral surface 8 a of the annular protrusion 8 is formed substantially parallel to the axis AX of the upper lid 3 extending in the upper and lower AB directions. The inner peripheral surface 8a may be inclined with respect to the axis AX so as to spread downward from the upper end wall 3b, but it is not desirable to narrow downward from the upper end wall 3b. On the other hand, the outer peripheral surface 8f is formed to be slightly inclined with respect to the axis AX, and the annular projecting portion 8 is formed in a tapered shape so that the thickness becomes thinner toward the lower end.

Further, the inner peripheral surface 8a at the lower end of the annular protrusion 8 of the upper lid 3 has a claw 8c for engaging with the protrusion 4p provided on the separating portion 4 of the inner plug 2 when opened, with the axis AX of the upper lid 3 It is formed toward the direction. The upper end wall 3b can hold the separation part 4 of the inner plug 2 as a holding part by including the annular protrusion 8 and the claw 8c. More specifically, the protrusion 4p extending from the separation portion 4 is fitted into a recess formed in the upper portion of the claw 8c of the annular protrusion 8 in a state where the tip 4e is bent downward, and is fixed to the recess. Since the tip 4e of the protrusion 4p tends to expand so as to return to its original shape, as a result, the upper part 4u of the separation part 4 is confined in the annular protrusion 8 in a state where the tension is applied with a force of a certain level or more. .

Referring back to FIG. 1, the container body 50 is an integrally molded product made of resin or an integrally molded product made of glass, and the mouth portion 50a is narrower than the other barrel portion 50b. And the annular recessed part 50c is formed in the outer peripheral surface of the opening part 50a in the circumferential direction.

Hereinafter, the assembly of the cap 1 and the opening operation of the lidded container 100 will be described with reference to FIGS.

First, as shown in FIG. 5, the cap 1 is assembled by putting the upper lid 3 on the inner plug 2, screwing the female screw 3 d of the upper lid 3 into the male screw 5 f of the inner plug 2, and rotating the upper lid 3. As shown in FIG. 6, the upper lid 3 is engaged with the inner plug 2. At that time, the tips 4e of the projections 4p pass through the claws 8c by moving the tips 4e inward while bending the tips 4e of the plurality of projections 4p provided on the upper part 4u of the separation part 4 downward. When the tip 4e of the projection 4p has passed through the claw 8c, the entire projection 4p is accommodated in the annular projection 8, and the tip 4e of the projection 4p engages with the claw 8c, or the projection 4p The tip 4e is housed slightly behind the claw 8c. At this time, by ensuring a predetermined gap sp between the upper end wall 3b of the upper lid 3 and the ceiling wall 4b of the separation part 4, the separation part 4 can be sufficiently pushed in, and the protrusion 4p The engaging operation in which the tip 4e passes through the claw 8c can be reliably performed.

Next, the cap 1 is attached to the mouth portion 50 a of the container body 50. As shown in FIG. 7, the cap 1 is attached to the container body 50 by pushing the mouth part 50 a of the container body 50 between the outer cylinder part 5 a and the inner cylinder part 5 b in the cap 1. In this state, the protrusion 5d of the inner plug 2 is fitted into the annular recess 50c of the container main body 50 to ensure the coupling between the inner plug 2 and the container main body 50.

In order to store the liquid in the container, the liquid is first injected into the container body 50, and the previously assembled cap 1 is attached to the container body 50 as described above. The inner stopper 2 may be attached to the container body 50 into which the liquid has been injected, and the upper lid 3 may be attached to the inner stopper 2 thereafter.

When taking out the contents from the lid-equipped container 100 in this state, first, the upper lid 3 is rotated in the direction of tightening, that is, clockwise. Then, as shown in FIG. 8, the separation part 4 of the inner plug 2 is pushed by the lower surface of the upper end wall 3 b of the upper lid 3, whereby the score 7 (see FIG. 2 b) is cut and the separation part 4 is The main body side 20 can be detached from the main body side cylindrical portion 6. That is, the cap 1 is in an opened state or a separated state in which the opening part OP (see FIG. 9) is formed in the main body part 20. In this state, the upper part 4u of the separation part 4 is accommodated in the annular protrusion 8 via the plurality of protrusions 4p, and is close to the upper end wall 3b of the upper lid 3.

When the upper lid 3 is rotated in the loosening direction, that is, counterclockwise when the separating portion 4 is separated from the main body portion 20 of the cap 1, the cap 1 is restrained by the claw 8 c of the annular protruding portion 8 along with the upper lid 3. The separation part 4 is detached from the main body side cylindrical part 6 of the inner plug 2. When the upper lid 3 is lifted upward, as shown in FIG. 9, the separating portion 4 is pulled up as the upper lid 3 is raised, and the separating portion 4 is easily detached from the main body side cylindrical portion 6 of the inner plug 2. Is done. As described above, as shown in FIG. 9, the inner plug 2 is opened, and the liquid in the container body 50 can be poured out from the formed opening OP.

As shown in FIG. 10, the upper lid 3 removed from the main body portion 20 of the inner plug 2 holds the upper portion 4 u of the separating portion 4 in the annular projecting portion 8. The upper lid 3 holding the separation unit 4 is detachable from the container body 50 shown in FIG.

In order to attach the upper lid 3 that holds the separating portion 4 to the container body 50 and the inner plug 2 that have been once opened in this way, the female screw 3d of the upper lid 3 is again set to the male screw 5f of the inner plug 2. The upper lid 3 is rotated clockwise by screwing. Then, the separation part 4 held by the upper lid 3 by the above-described opening is fitted into the opening OP of the main body side cylindrical part 6 of the inner plug 2 and the opening OP is closed. This state is the same as in FIG. At this time, since the step 4x and the inner surface 6s and the upper end 6t of the main body side cylindrical portion 6 are in close contact with each other, the separation portion 4 can prevent the contents from leaking out, that is, functions as an inner seal plug.

FIG. 11 is an enlarged cross-sectional view showing a state where the separating portion 4 is held by the annular protruding portion 8, and corresponds to a part of FIG. The plurality of protrusions 4p provided on the upper part 4u of the separation part 4 are housed in the annular protrusion 8 while being bent downward, and the tip 4e of the protrusion 4p is engaged with the claw 8c. Thereby, the downward movement of the protrusion 4p is restricted, and the upper portion 4u of the separation portion 4 is prevented from coming out of the annular protrusion 8. At this time, since the plurality of protrusions 4p are bent and compressive stress is generated in them, and the tip 4e of the protrusion 4p is held by the claw 8c, the holding of the separation part 4 by the annular protrusion 8 is stable. The separation part 4 is reliably prevented from falling off.

A contact ring 3g, which is a low annular protrusion, is formed on the lower surface of the upper end wall 3b of the upper lid 3. The contact ring 3g is provided so that the upper lid 3 and the separation part 4 are in line contact without surface contact. By providing the contact ring 3g, it is possible to prevent the frictional resistance from increasing when the upper lid 3 is rotated and pushed in, and the opening operation for pushing and separating the separation portion 4 becomes easy.

Referring to FIG. 7, a case where an impact is applied to the upper lid 3 during the transport of the lidded container 100 will be described. For example, when an impact force F from the upper right is applied to the upper right corner of the upper lid 3 in the drawing, the boundary between the side wall 3a and the upper end wall 3b of the upper lid 3 is deformed so as to be slightly recessed. As a result, the annular projecting portion 8 is displaced so as to be slightly lowered on the right side of the drawing, but even if the annular projecting portion 8 moves downward relative to the projecting portion 4p of the separating portion 4, the projecting portion 4p is bent and deformed. Since the gap sp is also present, the separation part 4 is not damaged. On the other hand, the annular protrusion 8 is displaced so as to rise slightly on the left side of the drawing. In this case, when the annular projecting portion 8 moves upward with respect to the projecting portion 4p of the separating portion 4, the tip 4e of the projecting portion 4p moves relatively to the claw 8c side, and the separating portion 4 is pulled upward. . However, since the protrusion 4p deforms flexibly like an elastic body or a spring, it can be avoided that a large force concentrates on the score 7 of the separation part 4, and the breakage of the separation part 4 hardly occurs.

As described above, in the present embodiment, the separating portion 4 is provided along the outer periphery of the upper portion 4u and has a plurality of thin plate-like protruding portions 4p protruding sideways, and the protruding portions 4p are arranged in the axial direction. Since it has flexibility to be deformed, the upper portion 4u of the separation portion 4 can be held by the annular protrusion 8 of the upper lid 3 by using the protrusion 4p. Further, since the upper portion 4u of the separation portion 4 is held by the annular protrusion 8 of the upper lid 3, even if an impact force F is applied to the upper lid 3 and the upper lid 3 is deformed thereby, the plurality of protrusions 4p are elastically deformed. Since the deformation of the upper portion 4u of the separation portion 4 with respect to the annular protrusion 8 is allowed to some extent as a buffer material to be deformed, the impact transmitted to the separation portion 4 of the inner plug 2 via the annular protrusion 8 is reliably mitigated. Is done. This reliably prevents the score 7 between the separation part 4 and the main body side cylindrical part 6 from being damaged.

In this embodiment, the upper lid 3 and the inner plug 2 are coupled to each other by screwing. In this case, since the upper lid 3 and the inner stopper 2 can be assembled in advance in a process separate from the container body 50, the production process can be rationalized. In addition, when the upper lid 3 is screwed to the inner plug 2, there is a tendency that the upper lid 3 is loose due to the influence of the material of the inner plug 2, etc., and the significance of the plurality of protrusions 4p for reducing the impact increases.

The present invention is not limited to the above-described embodiment, and various modifications are possible. For example, as in the separation portion 4 shown in FIG. be able to. Moreover, like the separation part 4 shown in FIG. 12b, the plurality of protrusions 4p can be trapezoidal.

Further, in the present embodiment, the inner stopper 2 is a stopper type composite cap, and the contents are sealed together with the container body 50 together with the container body 50 by using the fitting portion 5 in an airtight or liquid tight manner. The liquid as the contents of the container main body 50 can be stored not only by the stopper but also by, for example, screw-type sealing or welding.

Moreover, in the said embodiment, although the inside plug 2 which offset the separation part side cylindrical part 4a to the inside by the thickness of the main body side cylindrical part 6 rather than the main body side cylindrical part 6 is shown, The part-side tubular part 4 a may be offset outward from the body-side tubular part 6 by the thickness of the body-side tubular part 6.

Further, in the above embodiment, a seal that is a low annular protrusion can be provided on at least one of the outer peripheral surface of the separation portion side cylindrical portion 4a and the inner peripheral surface of the main body side cylindrical portion 6. By providing such a seal, a more reliable liquid-tight state can be ensured between the separation portion side tubular portion 4 a and the main body side tubular portion 6. That is, it is possible to reliably prevent liquid leakage during reuse that is repeated after the first opening.

In the above embodiment, the upper lid 3 is screwed into the inner plug 2, but the upper lid 3 may be screwed into the container body 50.

Moreover, in the said embodiment, the nail | claw 8c of the cyclic | annular protrusion part 8 of the upper cover 3 engages with the several protrusion part 4p of the inner stopper 2 before opening, and the nail | claw 8c engages with the several protrusion part 4p after opening and is separated. It is assumed that the portion 4 is held by the annular protruding portion 8, but the claw 8 c of the annular protruding portion 8 of the upper lid 3 is opened only by contacting the plurality of protruding portions 4 p of the inner plug 2 from the upper side of the claw 8 c before opening, for example. It is also possible to adopt a configuration in which the claw 8c later engages with and holds the plurality of protrusions 4p.

The annular projecting portion 8 of the upper lid 3 is not limited to a complete cylinder, and may be composed of a plurality of projecting elements divided by a plurality of slits. In this case, the annular projecting portion 8 or the plurality of projecting elements are easily deformed by an external force in the radial direction, and the breakage of the separating portion 4 is less likely to occur.

Claims

Forming a sealed space for enclosing contents together with the container body, and an inner plug having a separation part for forming an opening in the sealed space;
A cap of a container comprising an upper lid having a holding part for holding the separation part,
The holding portion has an annular protrusion that extends downward from the lower surface of the upper end wall of the upper lid, and holds the upper portion of the separating portion from the periphery after the separating portion is separated from the inner plug.
The inner plug has a main body portion that is connected to the separation portion at the opening and is locked to the container main body,
The separation part has a plurality of protrusions provided along the outer periphery of the upper part and protruding laterally,
The protrusion is a thin cap in the axial direction and has a flexibility for deforming in the axial direction.
The container cap according to claim 1, wherein the plurality of protrusions are arranged at substantially equal intervals along the outer periphery of the upper portion and have substantially the same width in the circumferential direction.
The container cap according to any one of claims 1 and 2, wherein the protrusion is held in the annular protrusion in a bent state.
The container cap according to claim 3, wherein the protrusion is thinner on the tip side than on the root side.
The container cap according to any one of claims 1 to 4, wherein the annular projecting portion has a claw for receiving tips of the plurality of projecting portions at a lower end.
The container cap according to any one of claims 1 to 5, wherein the protrusion extends substantially along a plane perpendicular to the axial direction.
The cap for containers according to claim 6, wherein the protrusion is inclined downward from the root side toward the tip side.
The upper lid has a screwing portion that enables attachment to and detachment from the container main body by a rotating operation, and the separating portion is separated from the inner plug by pressing the separating portion by the rotating operation of the screwing portion. The container cap according to any one of claims 1 to 7, wherein the opening is formed.
The main body portion has a main body side cylindrical portion that defines the opening,
The container cap according to claim 8, wherein the separation part has a separation part side cylindrical part that is arranged to be offset to either the inner diameter side or the outer diameter side with respect to the main body side cylindrical part. .
The separation portion side cylindrical portion is offset to the inner diameter side with respect to the main body side cylindrical portion,
The cap for containers according to claim 9, wherein the annular base portion that supports the plurality of protrusions has a step that abuts against an inner surface and an upper end of the main body side cylindrical portion.
The container cap according to any one of claims 8 to 10, wherein the upper lid and the inner stopper are coupled to each other by screwing.