JP5009435B1 - Bottle cap - Google Patents

Abstract

To provide a bottle cap having improved mounting properties for a liquid container and water tightness for a water server.
In a bottle cap (1) attached to a cylindrical mouth part (2) of a liquid container for a water server, an outer member (3) formed with an outer cylindrical part (30) contacting the outer peripheral side of the cylindrical mouth part (2), and a cylinder And an inner member 4 formed with an inner cylindrical portion 40 through which the water supply shaft 5 of the water server is inserted. The outer member 3 and the inner member 4 are separate from each other. Formed and assembled.
[Selection] Figure 2

Description

  The present invention relates to a bottle cap technique, and more particularly to a bottle cap that is attached to a cylindrical mouth portion of a liquid container for a water server.

  In recent years, a water server has been proposed in which a liquid container filled with a liquid such as drinking water is connected, and drinking water in the liquid container is taken out from a spout and provided. Usually, the liquid container connected to the water server is used in a state where a bottle cap is attached to the cylindrical mouth portion. When the liquid container is connected to the water server, the water supply shaft of the water server is inserted into the liquid container through the bottle cap, and the drinking water in the liquid container does not leak out of the machine via the water supply shaft. Supplied to the spout.

  As disclosed in Patent Document 1 or Patent Document 2, the conventional bottle cap includes an outer cylindrical portion that contacts the outer peripheral side of the cylindrical mouth portion of the liquid container, and an inner cylinder through which the water supply shaft of the water server is inserted. And a lid portion that covers the open end of the cylindrical mouth portion continuously with the outer cylindrical portion. In a state where the bottle cap is attached to the cylindrical mouth portion of the liquid container, the outer cylindrical portion is elastically deformed in accordance with the shape of the cylindrical mouth portion and is brought into contact with and fixed to the outer peripheral side of the cylindrical mouth portion. The opening end of the cylindrical mouth portion is closed by the lid portion, and the inner cylindrical portion projects into the cylindrical mouth portion. When the liquid container is connected to the water server, the water supply shaft is inserted into the liquid container via the inner cylindrical portion.

JP 2011-63310 A JP 2010-89842 A

  However, in the configuration of the conventional bottle cap, since the outer cylindrical portion and the inner cylindrical portion are integrally formed, for example, when formed using a low-hardness material in order to improve the mounting property to the liquid container Is inferior in water tightness between the water shaft of the water server due to insufficient resin hardness of the inner cylindrical part, while when using a high hardness material to improve the water tightness to the water server, There was a problem that the resin hardness of the outer cylindrical portion was too high, and the handleability and moldability at the time of mounting on the liquid container were poor. In particular, the outer cylindrical portion and the lid portion change with time due to the stress applied in the mounting state on the liquid container, the water tightness of the cylindrical mouth portion decreases, and the bottle cap and the cylindrical mouth portion are separated from each other. There was also a problem of water leakage.

  In the conventional bottle cap, a packing member formed of a foam material is provided at a position where the outer cylindrical portion and the inner cylindrical portion are separated, and the opening end of the cylindrical mouth portion of the liquid container is pressed against the packing member. There is also a known configuration that prevents leakage, but dust in the air adheres to the static electricity generated by the foam material, and dust is mixed into the liquid container when the bottle cap is attached to the liquid container. However, in recent years, a configuration that does not use a packing member (packing-less) is becoming mainstream because there is a problem that the odor adsorbed on the packing member is transferred to drinking water or the like.

  As described above, the bottle cap has characteristics such as high-speed moldability, low odor, safety in contact with drinking water, stress crack resistance, and the like in recent years. There is a need for a bottle cap that is excellent in handleability and has both characteristics of mounting to a cylindrical mouth portion and water-tightness to a water server.

  Therefore, the present invention relates to a bottle cap, which solves the above-described conventional problems, and an object thereof is to provide a bottle cap having improved mounting properties for a liquid container and water tightness for a water server.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

That is, in claim 1, in the bottle cap attached to the cylindrical mouth portion of the liquid container for water server, an outer member formed with an outer cylindrical portion that contacts the outer peripheral side of the cylindrical mouth portion; An inner cylindrical portion that protrudes into the cylindrical mouth portion and into which the water supply shaft of the water server is inserted is formed, and an inner side member that has a peripheral flange at the opening edge of the inner cylindrical portion. The outer member and the inner member are separately formed and assembled, and the opening end of the cylindrical mouth is sandwiched between the inner peripheral surface of the outer cylindrical portion and the outer peripheral surface of the peripheral flange portion. Is.

  According to a second aspect of the present invention, the inner member is formed from a resin molded body having a higher hardness than the outer member.

According to a third aspect of the present invention, the inner member protrudes radially on the outer peripheral surface of the peripheral flange, and is formed with a water blocking rib portion that is pressed against the inner peripheral surface of the opening end of the cylindrical mouth portion. Is.

According to a fourth aspect of the present invention, in the outer member, a concave portion that can be fitted to the inner member is formed on an inner peripheral surface of the outer cylindrical portion, and the inner member is fitted to the concave portion to form the outer cylindrical shape. It is locked in the internal space of the part.

According to a fifth aspect of the present invention, the inner member is fitted with the bottomed tubular portion in close contact with the open end of the inner tubular portion, and the bottomed tubular shape is formed on the inner peripheral surface of the inner tubular portion. An engaging protrusion that can engage with an outer protrusion formed on the outer peripheral surface of the outer protrusion is formed at a position close to the outer protrusion.

According to a sixth aspect of the present invention, the inner member is fitted with the bottomed tubular portion in close contact with the open end of the inner tubular portion, and the inner diameter of the bottomed tubular portion is larger than the shaft diameter of the water supply shaft. Is also big.

According to a seventh aspect of the present invention, the outer member is formed with a lid portion that is continuous with the outer cylindrical portion, and a peeling member is integrally formed so as to close the opening portion opened in the lid portion. .

  As an effect of the present invention, it is possible to improve the mounting property for the liquid container and the water tightness for the water server.

It is the perspective view which showed the whole structure of the bottle cap which concerns on one Example of this invention. It is sectional drawing of a bottle cap. It is a perspective view of an inner member. It is a partial expanded sectional view of a bottle cap. It is sectional drawing which showed the state by which the bottle cap was mounted | worn by the cylindrical opening part. It is sectional drawing which showed the state by which a liquid container is connected with a water server. It is sectional drawing which showed the state from which the liquid container is removed from a water server. It is sectional drawing of the bottle cap of another Example. It is sectional drawing of the bottle cap of another Example.

  Next, modes for carrying out the invention will be described. In the following embodiments, the direction of arrow X in FIG.

  As shown in FIGS. 1 to 5, the bottle cap 1 of this embodiment is a cap member that is detachably attached to the cylindrical mouth portion 2 of the liquid container for water server. An outer member 3 formed with an outer tubular portion 30 that contacts the outer peripheral side of the mouth portion 2 and an inner tubular portion 40 that protrudes into the tubular mouth portion 2 and through which the water supply shaft 5 of the water server is inserted are formed. The outer member 3 and the inner member 4 are formed separately, and each is assembled and configured.

  The cylindrical mouth part 2 protrudes to one side of a liquid container (not shown) configured as a cartridge container filled with liquid such as drinking water, and the bottle cap 1 is attached to the cylindrical mouth part 2. In addition to being stored in a state, a liquid container is connected to the water server (see FIG. 6 and the like).

  The opening end of the cylindrical mouth portion 2 is chamfered into a gentle R shape, and a protruding portion 20 protruding in the radial direction from the outer peripheral side is formed, so that the bottle cap 1 can be easily attached to the cylindrical mouth portion 2. (See FIG. 5). The protruding portion 20 is fitted with a mounting recess 33 formed in an outer cylindrical portion 30 of the bottle cap 1 described later in a state where the bottle cap 1 is mounted on the cylindrical mouth portion 2. The cylindrical mouth portion 2 may be formed integrally with the container body or may be detachable from the container body.

  The outer member 3 is integrally formed with an outer cylindrical portion 30 that is thinly formed in a cylindrical shape having a circular cross section and a lid portion 31 that is continuous with one end of the outer cylindrical portion 30 and closes the opening end of the cylindrical mouth portion 2. Configured. On the inner peripheral surface 30 a of the outer cylindrical portion 30, there is a locking recess 32 along the circumferential direction in which the inner member 4 (the locking rib portion 42) is fitted at a position near the continuous portion with the lid portion 31. A mounting recess 33 is formed along the circumferential direction. The mounting recess 33 is formed at the position adjacent to the locking recess 32 and into which the projection 20 of the cylindrical mouth portion 2 is fitted.

  The lid 31 has an opening 31a through which the water supply shaft 5 of the water server is inserted at the center, and a peeling member 34 is provided so as to close the opening 31a from above. The opening 31a is opened larger than the shaft diameter of the water supply shaft 5 described later, and the inner cylindrical portion 40 of the inner member 4 is exposed through the opening 31a. The peeling member 34 is integrally formed with the main body portion so as to be easily peeled from the lid portion 31 (outer member 3), and is peeled off when the liquid container is connected to the water server, so that the opening 31a is exposed.

  The inner member 4 is formed on the inner cylindrical portion 40 which is thinly formed in a cylindrical shape having a circular cross section, the peripheral flange portion 41 formed on the opening edge portion of the inner cylindrical portion 40, and the peripheral edge portion of the peripheral flange portion 41. The engaging rib portion 42 to be formed is integrally formed. The inner cylindrical portion 40 is formed with a peripheral flange portion 41 and a locking rib portion 42 at one open end (upper side in FIG. 2), and the upper surface of the inner member 4 is the inner cylindrical portion 40 and the peripheral flange portion 41. In addition, the engaging rib portion 42 is formed to be substantially horizontal.

  The inner cylindrical portion 40 is fitted with the bottomed cylindrical portion 43 in close contact with the other (lower side in FIG. 2) opening end. On the inner peripheral surface of the inner cylindrical portion 40, an engaging protrusion 40a that can be engaged with an outer protrusion 43a formed on the outer peripheral surface of a bottomed cylindrical portion 43 described later is formed. The engagement protrusion 40a is formed in a tapered cross section so that the diameter gradually increases from the other opening end of the inner cylindrical portion 40. In this embodiment, the engagement protruding portion 40a is more than the opening end side of the inner cylindrical portion 40. The inner side is formed so that the taper angle becomes gentler (see FIG. 4 and the like).

  The peripheral flange 41 extends along the circumferential direction on the outer peripheral side of the opening end of the inner cylindrical portion 40, and an outer peripheral surface 41a having a predetermined axial width is formed along the circumferential direction. The peripheral flange 41 of this embodiment has an upper surface protruding upward from the inner member 4, and the opening of the opening 31 a formed in the lid 31 in a state where the outer member 3 and the inner member 4 are assembled together. Engage with the edge. Moreover, the outer peripheral surface 41a of the peripheral collar part 41 is formed in convex shape toward the radial direction (side direction) of the inner member 4, and the bottle cap 1 is attached to the cylindrical mouth part 2 as described later. In this state, it is pressed against the inner peripheral surface of the open end of the cylindrical mouth portion 2.

  The locking rib portion 42 protrudes in the radial direction at the peripheral edge portion of the peripheral flange portion 41 and is formed along the circumferential direction.

  The bottomed tubular portion 43 is fitted in a close state so as to close the other open end of the inner tubular portion 40 (downward in FIG. 2), and is fitted to the open end of the inner tubular portion 40. And is opened toward the inner direction of the inner cylindrical portion 40 (upward in FIG. 2). The bottomed cylindrical portion 43 has an outer projection 43a formed on the outer peripheral surface of the open end, and a closing collar portion 43b extending along the circumferential direction on the outer peripheral surface of the closed end. Further, on the outer peripheral surface of the bottomed tubular portion 43, a water stop rib portion 43c extends in the circumferential direction at a position in the vicinity of the closing rod portion 43b.

  The open end of the bottomed cylindrical portion 43 is opened in a circular shape in plan view and can be fitted into the water supply shaft 5 of the water server, and the end of the open end is bent radially inward to provide the water supply shaft 5. Can be engaged. Usually, a concave portion is formed at the tip of the water supply shaft 5, and the end of the open end of the bottomed cylindrical portion 43 is engaged with the concave portion. The bottomed cylindrical portion 43 of the present embodiment is formed so that the inner diameter is larger than the shaft diameter of the water supply shaft 5, and specifically, the same outer diameter length as that of the conventional member. It is formed to be thin while maintaining.

  The outer protruding portion 43a is engageable with an engaging protruding portion 40a formed on the inner peripheral surface of the inner cylindrical portion 40, and has a cross section so that the diameter gradually increases from the distal end portion of the bottomed cylindrical portion 43. It is formed in a tapered shape. The closing collar portion 43 b is brought into contact with the opening end of the inner cylindrical portion 40 in a state where the bottomed cylindrical portion 43 is fitted to the opening end of the inner cylindrical portion 40. Further, the water blocking rib portion 43 c is pressed into contact with the engaging protrusion 40 a of the inner cylindrical portion 40 in a state where the bottomed cylindrical portion 43 is fitted to the opening end of the inner cylindrical portion 40.

  In the inner member 4 of the present embodiment, the engagement protrusion 40a is formed in the proximity of the outer protrusion 43a, and the upper end surface of the engagement protrusion 40a and the lower end surface of the outer protrusion 43a have a separation distance L. Thus, they are arranged at positions close to each other in the vertical direction (see FIG. 4). Preferably, the separation distance L is formed to be as short as possible. In other words, the separation distance L is preferably formed so that the upper end surface of the engagement protrusion 40a and the lower end surface of the outer protrusion 43a are in contact with each other. In practice, the engagement protrusion 40a and the outer protrusion 43a are slightly separated from each other in consideration of the dimensional accuracy of the molding process of the inner member 4 (the inner cylindrical portion 40 and the bottomed cylindrical portion 43). Formed to have.

  In addition, the bottomed cylindrical part 43 may be integrally molded with the inner cylindrical part 40, or may be molded separately.

  The bottle cap 1 according to the present embodiment is formed by integrally assembling the outer member 3 and the inner member 4. Specifically, the bottle cap 1 is inserted into the inner space from the lower opening end of the outer cylindrical portion 30 of the outer member 3. The inner member 4 is locked in the inner space of the outer cylindrical portion 30 with the locking rib portion 42 fitted in the locking recess 32 formed on the inner peripheral surface 30 a of the outer cylindrical portion 30. The

  In a state where the outer member 3 and the inner member 4 are integrally assembled (see FIG. 2), the opening 31a of the lid portion 31 is closed from the inner space side of the outer cylindrical portion 30 by the inner member 4, and the lid When the peeling member 34 is peeled from the portion 31, the inner cylindrical portion 40 of the inner member 4 is exposed through the opening 31a. In this state, the inner cylindrical portion 40 protrudes downward into the inner space of the outer cylindrical portion 30, and the inner peripheral surface 30 a of the outer cylindrical portion 30 and the peripheral flange 41 of the inner cylindrical portion 40. A space is formed between the outer peripheral surface 41a and the outer peripheral surface 41a.

  When the bottle cap 1 is attached to the cylindrical mouth portion 2 (see FIG. 5), the outer cylindrical portion 30 is elastically deformed according to the shape of the opening end (projection portion 20) of the cylindrical mouth portion 2. Thus, the inner peripheral surface 30a of the outer cylindrical portion 30 is brought into contact with the outer peripheral side of the cylindrical mouth portion 2 in a pressure-bonded state. The opening end of the cylindrical mouth portion 2 inserted and fitted into the outer cylindrical portion 30 is inserted into a gap between the inner peripheral surface 30a of the outer cylindrical portion 30 and the outer peripheral surface 41a of the peripheral flange portion 41 described above. The protrusion 20 is fitted into the mounting recess 33 formed on the inner peripheral surface 30 a of the outer cylindrical portion 30, and is sandwiched between the inner peripheral surface 30 a of the outer cylindrical portion 30 and the outer peripheral surface 41 a of the peripheral flange 41. Pressed and held.

  In the bottle cap 1 of the present embodiment, the protruding portion 20 is sandwiched between the inner peripheral surface 30a of the outer cylindrical portion 30 and the outer peripheral surface 41a of the peripheral flange 41, and the protruding rib 20 is The opening end of the cylindrical mouth portion 2 is closed by the inner member 4 so that the front end (upper end in FIG. 5) is brought into contact. By being configured in this way, the bottle cap 1 is located with respect to the cylindrical mouth portion 2 so that the liquid in the cylindrical mouth portion 2 does not leak from the gap between the cylindrical mouth portion 2 and the inner member 4. It can be installed in a watertight state.

  In the state where the bottle cap 1 is attached to the cylindrical mouth portion 2, the inner cylindrical portion 40 protrudes into the cylindrical mouth portion 2, but in this embodiment, the opening end of the inner cylindrical portion 40 is Since the bottomed tubular portion 43 is closely fitted so that the water stop rib portion 43c is pressed against the engaging projection portion 40a, the inside of the tubular mouth portion 2 is opened from the open end of the inner tubular portion 40. The liquid will not leak.

  The outer member 3 and the inner member 4 of the present embodiment are formed from a resin molded body using a synthetic resin material such as high-density polyethylene, low-density polyethylene, polyethylene, polyethylene terephthalate, polyvinyl chloride, polystyrene, polypropylene, or polyester. The In particular, in this embodiment, the outer member 3 and the inner member 4 are formed from synthetic resin materials having different mechanical strengths. Specifically, the resin molded body forming the inner member 4 is a resin molded member forming the outer member 3. Those having a higher “hardness” that is an index representing mechanical strength than the body are preferably used. The synthetic resin material to be used is not particularly limited as long as the inner member 4 has a higher hardness than the outer member 3.

  Next, the attachment and detachment of the liquid container with the bottle cap 1 of this embodiment attached to the water server will be described in detail below.

  As shown in FIG. 6, when the liquid container is connected to the water server, after the peeling member 34 is peeled off from the bottle cap 1, the liquid container is placed with the bottle cap 1 facing downward from above the water server. Is moved downward, and the water supply shaft 5 is inserted into the inner cylindrical portion 40 of the inner member 4 exposed from the lid portion 31 (FIG. 6A). With the downward movement of the liquid container, the water supply shaft 5 inserted into the inner cylindrical portion 40 is brought into contact with the bottomed cylindrical portion 43 provided at the opening end of the inner cylindrical portion 40, and the inner cylindrical portion is eventually added. The bottomed cylindrical portion 43 is pushed up by a separation distance L with respect to 40, and the engagement protrusion 40a and the outer protrusion 43a are engaged (FIG. 6B).

  When the liquid container is further moved downward in a state in which the engaging protrusion 40a and the outer protrusion 43a are engaged, the bottomed tubular part 43 is fitted into the water supply shaft 5, and the bottomed tubular part 43 is inserted. And the water supply shaft 5 are engaged (FIG. 6C). Then, the bottomed tubular portion 43 is detached from the inner tubular portion 40, and the water supply shaft 5 protrudes into the tubular mouth portion 2 (FIG. 6 (d)). At this time, as for the inner cylindrical part 40 and the water supply shaft 5, the inner peripheral surface (engagement protrusion part 40a) of the inner cylindrical part 40 and the outer peripheral surface of the water supply shaft 5 are closely_contact | adhered.

  On the other hand, as shown in FIG. 7, when the liquid container is removed from the water server, the liquid container is moved up (FIG. 7 (a)), so that the water supply shaft 5 and the engaging protrusion 40a are moved. The bottomed tubular portion 43 is gradually fitted to the inner tubular portion 40 while the outer protruding portion 43a is slidably contacted (FIG. 7 (b)), and a closing collar portion is eventually formed at the opening end of the inner tubular portion 40. 43b is contacted and the bottomed cylindrical portion 43 is completely fitted to the inner cylindrical portion 40 (FIG. 7C). Then, after the bottomed tubular portion 43 is fitted to the inner tubular portion 40, the water supply shaft 5 is detached from the bottomed tubular portion 43 (FIG. 7 (d)).

As described above, the bottle cap 1 according to the present embodiment includes the outer cylindrical portion 30 that contacts the outer peripheral side of the cylindrical mouth portion 2 in the bottle cap 1 attached to the cylindrical mouth portion 2 of the liquid container for water server. The outer member 3 is formed, and the inner tubular portion 40 that protrudes into the tubular mouth portion 2 and through which the water supply shaft 5 of the water server is inserted is formed. The outer member 3 and the inner member 4 are separately formed and assembled, and the inner peripheral surface 30a and the peripheral flange portion 41 of the outer cylindrical portion 30 are assembled. Since the opening end of the cylindrical mouth part 2 is pinched by the outer peripheral surface 41a, the mounting property of the liquid container to the cylindrical mouth part 2 and the water tightness of the water server to the water supply shaft 5 can be improved.

  That is, in the bottle cap 1 of the present embodiment, the outer member 3 in which the outer cylindrical portion 30 is formed and the inner member 4 in which the inner cylindrical portion 40 is formed are separately formed. The inner member 4 can be individually formed from resin moldings having different mechanical strengths. Therefore, when attaching the bottle cap 1 to the cylindrical mouth part 2, the outer cylindrical part 30 is appropriately elastically deformed and the outer member 3 is appropriately crimped to the outer peripheral side of the cylindrical mouth part 2. By using a synthetic resin material having mechanical strength, it is possible to improve the mountability of the bottle cap 1 to the cylindrical mouth portion 2 of the liquid container.

  On the other hand, the inner member 4 is formed using a synthetic resin material having a mechanical strength such that the inner tubular portion 40 is optimally closely fitted to the water supply shaft 5 when the liquid container is connected to the water server. Thus, the water tightness of the bottle cap 1 with respect to the water supply shaft 5 of the water server can be improved. Furthermore, by forming the inner member 4 using a synthetic resin material having an optimum mechanical strength, the bottomed cylindrical portion 43 provided at the opening end of the inner cylindrical portion 40 of the inner member 4 is changed to the inner cylindrical portion. It is possible to securely engage the water supply shaft 5 inserted in 40 to prevent the bottomed tubular portion 43 from being detached from the water supply shaft 5 in the liquid container, and to pull out the water supply shaft 5 from the inner tubular portion 40. In this case, the bottomed tubular portion 43 can be securely fitted into the open end of the inner tubular portion 40 in a close state and returned to the original state.

  Further, in the bottle cap 1 of the present embodiment, the inner member 4 is formed of a resin molded body having a higher hardness than the outer member 3, so that the above-described mountability of the liquid container to the cylindrical mouth portion 2 is maintained. Further, the water tightness of the water server with respect to the water supply shaft 5 can be further improved. Specifically, since the weight of the liquid container can be as much as 10 to 20 L, the liquid container is inclined with respect to the water supply shaft 5 when the liquid container is connected to the water server (see FIG. 6). The work may be performed in the According to the bottle cap 1 of the present embodiment, by forming the inner member 4 from a high-hardness resin molded body, the water tightness of the inner member 4 (inner cylindrical portion 40) with respect to the water supply shaft 5 is increased, and the inner side is increased. The liquid in the liquid container can be reliably prevented from leaking from the separation of the tubular portion 40 and the water supply shaft 5 and the inner tubular portion 40 is pushed and spread by the water supply shaft 5 even in the above-described case. It is possible to prevent the bottomed tubular portion 43 from being detached from the inner tubular portion 40 without being engaged with the water supply shaft 5.

  Further, in the bottle cap 1 of the present embodiment, the inner member 4 has a peripheral flange 41 formed at the opening edge of the inner cylindrical portion 40, and the inner peripheral surface 30 a and the peripheral flange 41 of the outer cylindrical portion 30. Since the opening end of the cylindrical mouth portion 2 is sandwiched between the outer peripheral surface 41a and the outer peripheral surface 41a, the bottle cap 1 can be attached to the tubular mouth portion 2 with better water tightness. The liquid in the cylindrical mouth portion 2 can be prevented from leaking from the gap between the mouth portion 2 and the inner member 4.

  Further, in the bottle cap 1 of this embodiment, the outer member 3 is formed with a locking recess 32 that can be fitted to the inner member 4 on the inner peripheral surface 30a of the outer cylindrical portion 30, and the inner member 4 is locked. Since it is configured to be fitted in the recess 32 and locked in the inner space of the outer cylindrical portion 30, the assembly work between the outer member 3 and the inner member 4 is simple, and the processing and formation are easy. is there.

  Further, in the bottle cap 1 of the present embodiment, the bottomed cylindrical portion 43 is closely fitted to the opening end of the inner cylindrical portion 40 in the inner member 4, and the inner circumferential surface of the inner cylindrical portion 40 is fitted. Since the engaging projection 40a that can be engaged with the outer projection 43a formed on the outer peripheral surface of the bottomed cylindrical portion 43 is formed in the proximity of the outer projection 43a, the inner cylindrical portion 40 is rigid. When the liquid container is removed from the water server (see FIG. 7), the opening of the inner cylindrical portion 40 is brought into sliding contact with the water supply shaft 5 and the outer protrusion 43a with respect to the engagement protrusion 40a. The bottomed cylindrical portion 43 can be more reliably fitted to the end.

  Further, in the bottle cap 1 of the present embodiment, the bottomed cylindrical portion 43 is closely fitted to the open end of the inner cylindrical portion 40 in the inner member 4, and the inner diameter of the bottomed cylindrical portion 43 is Is formed so as to be larger than the shaft diameter of the water supply shaft 5, the bottomed cylindrical portion 43 can be prevented from being deformed in the radial direction by the water supply shaft 5, and the liquid container is formed from the water server. When removed (see FIG. 7), the bottomed tubular portion 43 can be more reliably fitted to the open end of the inner tubular portion 40.

  Further, the bottle cap 1 of the present embodiment has a lid 31 that is continuous with the outer cylindrical portion 30 formed on the outer member 3, and a peeling member that closes the opening 31 a that is opened in the lid 31. 34 is integrally formed, so that the label member is not peeled off due to adhesion deterioration as compared with the configuration in which the label member is pasted on the lid portion 31 in order to close the opening 31a as in the prior art. It is possible to effectively prevent deterioration of the quality of the liquid container and quality tampering associated with peeling.

  In addition, as a structure of the bottle cap 1, it is not limited to the Example mentioned above, A various change is possible unless it deviates from the objective of this invention. However, in the other embodiments described below, the description of the same components as those in the above-described embodiments is omitted unless otherwise specified.

  That is, the bottle cap 1 of the above-described embodiment is a cylinder formed by the inner peripheral surface 30a of the outer cylindrical portion 30 and the outer peripheral surface 41a of the peripheral flange portion 41 in a state where the bottle cap 1 is attached to the cylindrical mouth portion 2. Although the opening end of the shaped mouth portion 2 is configured to be pinched (see FIG. 5), the mounting structure of the bottle cap 1 to the tubular mouth portion 2 is not limited to this.

  For example, like the bottle cap 101 of the embodiment shown in FIG. 8, the water blocking rib portion 144 that protrudes in the radial direction may be formed on the outer peripheral surface 141 a of the peripheral flange portion 141 in the inner member 104. The water blocking rib portion 144 extends along the circumferential direction of the outer peripheral surface 141a. With this configuration, the protruding portion 20 is pinched by the inner peripheral surface 30a of the outer cylindrical portion 30 and the outer peripheral surface 41a of the peripheral flange portion 41 in a state where the bottle cap 101 is attached to the cylindrical mouth portion 2. When the inner member 104 is molded, shrinkage or the like occurs when the water-stopping rib portion 144 is elastically deformed and pressed against the inner peripheral surface of the projection portion 20. The gap between the cylindrical mouth portion 2 and the inner member 4 (the gap between the inner peripheral surface of the protrusion 20 and the outer peripheral surface 41a of the peripheral flange portion 41) can be more reliably closed, and the bottle with respect to the cylindrical mouth portion 2 The cap 1 can be mounted in a higher watertight state.

  In the bottle cap 101, locking recesses 132 are formed at predetermined locations (three locations in the present embodiment) in the circumferential direction of the inner circumferential surface 130 a of the outer cylindrical portion 130, and locking ribs 132 are formed in the locking recesses 132. The inner member 104 is configured to be locked in the inner space of the outer cylindrical portion 130 in a state where the portion 142 is fitted. Further, the position, shape and the like of the locking recess 132 are not particularly limited, and the locking rib portion 142 is directly brought into contact with the inner peripheral surface 130a of the outer cylindrical portion 130 without further providing the locking recess 132. Thus, the inner member 104 may be locked in the inner space of the outer cylindrical portion 130.

  Further, like the bottle cap 201 of the embodiment shown in FIG. 9, a locking recess 232 is formed along the circumferential direction on the inner peripheral surface 230 a of the outer cylindrical portion 230 of the outer member 203, and the inner member 204. A peripheral flange portion 241 and a locking rib portion 242 are formed at the opening edge of the inner cylindrical portion 240 of the inner cylindrical portion 240, and the bottle cap 201 is attached to the cylindrical mouth portion 202 and is inserted into the outer cylindrical portion 230. The open end (projection part 220) of the cylindrical mouth part 202 may be configured such that the outer peripheral surface 241a of the peripheral flange part 241 and the locking rib part 242 are fitted and pinched.

  Further, in the bottle cap 1 of the above-described embodiment, the protruding portion 20 is pinched by the inner peripheral surface 30a of the outer cylindrical portion 30 and the outer peripheral surface 41a of the peripheral flange portion 41, and the protruding portion 20 protrudes into the locking rib portion 42. The opening end of the cylindrical mouth portion 2 is closed by the inner member 4 so that the tip of the portion 20 is in contact, but it is not always necessary to make the tip of the projection 20 contact the locking rib portion 42. Instead, as shown in FIG. 5 or FIG. 8, it may be configured to closely contact the inner peripheral surface of the protrusion 20 and the outer peripheral surface 41 a of the peripheral flange 41 so as to eliminate the gap.

DESCRIPTION OF SYMBOLS 1 Bottle cap 2 Cylindrical mouth part 3 Outer member 4 Inner member 5 Water supply shaft 20 Protrusion part 30 Outer cylindrical part 30a Inner peripheral surface 31 Lid part 31a Opening part 32 Locking recessed part (recessed part)
33 Mounting recess 34 Peeling member 40 Inner cylindrical portion 40a Engagement projection portion 41 Peripheral flange portion 42 Locking rib portion 43 Bottomed cylindrical portion 43a Outer projection portion 43b Closure projection portion

Claims (7)

In the bottle cap attached to the cylindrical mouth of the liquid container for water server,
An outer member formed with an outer cylindrical portion that contacts the outer peripheral side of the cylindrical mouth portion;
An inner member that protrudes into the cylindrical mouth and into which a water supply shaft of a water server is inserted is formed, and an inner peripheral member that is formed with a peripheral flange on the opening edge of the inner tubular portion ;
Comprising
The outer member and the inner member are separately formed and assembled,
The opening end of the cylindrical mouth portion is pinched by the inner peripheral surface of the outer cylindrical portion and the outer peripheral surface of the peripheral flange portion,
A bottle cap characterized by that.   The bottle cap according to claim 1, wherein the inner member is formed of a resin molded body having a higher hardness than the outer member. The said inner side member protrudes toward the outer peripheral surface of the said peripheral collar part toward radial direction, The water stop rib part which press- contacts to the inner peripheral surface of the opening end of the said cylindrical opening part is formed. Item 3. The bottle cap according to Item 2.   The outer member is formed with a recess that can be fitted with the inner member on the inner peripheral surface of the outer cylindrical portion, and the inner member is fitted into the concave portion and is within the inner space of the outer cylindrical portion. The bottle cap according to any one of claims 1 to 3, which is locked.   The inner member is fitted with the bottomed tubular portion in close contact with the open end of the inner tubular portion, and is formed on the inner peripheral surface of the inner tubular portion on the outer peripheral surface of the bottomed tubular portion. The bottle cap according to any one of claims 1 to 4, wherein an engaging protrusion that can be engaged with the outer protrusion is formed at a position close to the outer protrusion.   The inner member is fitted with an open end of the inner cylindrical portion so that the bottomed cylindrical portion is in close contact, and the inner diameter of the bottomed cylindrical portion is larger than the shaft diameter of the water supply shaft. The bottle cap according to claim 5.   7. The outer member according to any one of claims 1 to 6, wherein a lid portion that is continuous with the outer cylindrical portion is formed, and a peeling member is integrally formed so as to close an opening portion opened in the lid portion. The bottle cap according to claim 1.

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