JP2020083406A - Bottle cap - Google Patents

Abstract

To provide a bottle cap that improves water cut-off performance while preventing degradation of beverage inside a liquid container.SOLUTION: A bottle cap 1 is integrally formed by: a top surface part 20 that is used by being mounted on a cylindrical mouth part 10 of a liquid container for a water server and forms a top surface; a bearing part 21 that is formed on the center of the top surface part 20 and is inserted into a water supply shaft 11 of the water server; and an outer edge part 22 that is formed on the circumference of the top surface part 20 and abuts an outer peripheral surface of the cylindrical mouth part 10. The bottle cap includes a water cut-off member 4 that has an inner part 40 formed into a disk shape in a plan view with non-foamed synthetic resin, pressure-welded on an outer peripheral surface of the bearing part 21 in a watertight state, and fitted into the bearing part 21, and an outer part 41 pressure-welded on an inner peripheral surface of the cylindrical mouth part 10 in a watertight state with the liquid container in a state of being connected to the water server.SELECTED DRAWING: Figure 2

Description

The present invention relates to the technology of a bottle cap, and more specifically, it is used by being attached to a tubular mouth portion of a liquid container for a water server, and a top surface portion forming a top surface and a water formed in a central portion of the top surface portion. The present invention relates to a bottle cap in which a bearing portion into which a water supply shaft of a server is inserted and an outer edge portion which is formed on a peripheral edge of a top surface portion and abuts on an outer peripheral surface of a tubular mouth portion are integrally formed.

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 the drinking water in the liquid container is taken out from a spout and provided. Usually, the liquid container connected to this water server is used with the bottle cap attached to the cylindrical opening. 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, Supplied to the spout.

As a conventional bottle cap of this type, for example, as disclosed in Patent Document 1, used by being attached to a cylindrical mouth portion of a liquid container for a water server and forming a top surface, and a top surface portion. The bearing part formed in the central part of the water server into which the water supply shaft of the water server is inserted and the outer edge part formed on the peripheral edge of the top surface part and contacting the outer peripheral surface of the tubular mouth part are integrally formed. There is known a configuration in which a packing member made of foamed resin is fitted in. In a state where the bottle cap of this type is mounted on the liquid container, the outer edge portion is elastically deformed and abuts and is fixed to the outer peripheral surface of the tubular mouth portion. It is configured so that the drinking water in the liquid container does not leak out of the machine by being pressed into contact with the tip of the.

JP, 2013-14364, A

However, in the configuration of the conventional bottle cap described above, since the packing member is made of foamed resin such as foamed polyethylene, it may be soft and easy to break. Is mixed in the liquid container, or the odor of the packing material is transferred to the drinking water in the liquid container with the bottle cap attached, which causes a problem that the quality of the drinking water deteriorates. It was Further, if the bottle cap is not properly attached, a gap is created between the packing member and the tip of the opening end of the tubular mouth portion, so that the drinking water in the liquid container leaks out of the machine. was there.

Then, this invention solves the said conventional subject regarding a bottle cap, and an object of this invention is to provide the bottle cap which prevented the quality fall of the drinking water in a liquid container, and improved the water stop.

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

That is, according to the first aspect of the present invention, the top of the water container, which is used by being attached to the tubular mouth of the liquid container for the water server and which forms the top, and the water supply shaft of the water server, which is formed in the center of the top, are inserted. In a bottle cap in which a bearing portion to be formed and an outer edge portion which is formed on the peripheral edge of the top surface portion and abuts on the outer peripheral surface of the cylindrical opening portion are integrally formed, a disc in plan view made of non-foaming synthetic resin. The inner surface of the cylindrical mouth portion in a state in which a liquid container is connected to a water server and an inner portion that is formed into a shape and is pressed against the outer peripheral surface of the bearing portion in a watertight state in a water-tight state. And a water stop member having an outer portion that is pressure-contacted in a watertight state.

3. The water blocking member according to claim 2, wherein the water blocking member has a water blocking rib formed on a peripheral edge of the outer portion on the liquid container side, the rib being in contact with the inner peripheral surface of the tubular opening in a pressed state. is there.

According to a third aspect of the present invention, the water blocking member has a fitting rib formed on a peripheral edge of the inner portion on the liquid container side, the fitting rib being in contact with the outer peripheral surface of the bearing portion while being pressed.

According to a fourth aspect of the present invention, the water shut-off member is provided with a flange portion, which is pressed against the inner peripheral surface of the outer edge portion, at a peripheral edge of the outer portion on the water supply shaft insertion side.

According to a fifth aspect of the present invention, the water blocking member has a groove portion, which is annular in a plan view, formed between the inner portion and the outer portion.

As an effect of the present invention, it is possible to improve the water stopping property while preventing the quality of drinking water in the liquid container from being deteriorated.

It is sectional drawing which showed the whole structure of the bottle cap of 1st Example. It is sectional drawing which showed the state with which the bottle cap was attached to the cylindrical opening. It is a perspective view of a water blocking member. It is a front view of a water blocking member. It is a perspective sectional view of a water blocking member. It is sectional drawing of a water blocking member. It is a partial expanded sectional view of FIG. It is sectional drawing which showed the state in which the liquid container was connected to the water server. It is a perspective view of the water blocking member of another Example. It is sectional drawing of the water blocking member of FIG. It is a perspective view of the water blocking member of another Example. It is sectional drawing of the water blocking member of FIG. It is a perspective view of the water blocking member of another Example. It is sectional drawing of the water blocking member of FIG.

Next, modes for carrying out the invention will be described. In the following examples, the arrow X direction in FIG. 1 is the vertical direction of the bottle cap 1.

As shown in FIGS. 1 to 3, the bottle cap 1 of the present embodiment is a cap member that is detachably attached to the tubular mouth portion 10 of the liquid container for a water server, and specifically, the central portion. A body member 2 having a cylindrical bearing portion 21 into which a water supply shaft 11 of a water server (not shown) is formed, and an inner member 3 removably held at an opening end of the bearing portion 21 on the liquid container side. And a water blocking member 4 and the like fitted in the bearing portion 21 and attached to the main body member 2.

The tubular mouth portion 10 projects to one side of a liquid container (not shown) configured as a cartridge container filled with a liquid such as drinking water, and the bottle cap 1 is attached to the tubular mouth portion 10. In this state, the liquid container is connected to the water server. The opening end of the tubular mouth portion 10 is chamfered in a gentle R shape, and a projection 12 that is radially protruded from the outer peripheral side is formed, so that the bottle cap 1 can be easily attached to the tubular mouth portion 10. Is configured. The protrusion 12 is fitted with a mounting recess 22 a formed in the main body member 2 described later in a state where the bottle cap 1 is mounted in the tubular mouth 10.

The main body member 2 integrally includes a top surface portion 20 forming a top surface, a cylindrical bearing portion 21 formed in a central portion on the top surface side, an outer edge portion 22 formed on a peripheral edge of the top surface portion 20, and the like. Is configured. A label member (not shown) for closing the opening of the bearing portion 21 is attached to the upper surface of the top surface portion 20, and a water blocking member 4 described later is disposed below the top surface portion 20.

The bearing portion 21 is formed with a shaft hole 21a into which a water supply shaft 11 is inserted inside a cylindrical shape, and is located above (hereinafter referred to as "water supply shaft insertion side") and below the opposite side (hereinafter referred to as "liquid container side"). Is called). The bearing portion 21 is formed such that the inner diameter on the liquid container side is slightly smaller than the outer diameter of the inner member 3 described later, and the inner member 3 is formed at the opening end on the liquid container side (lower side in FIG. 1). In a watertight state, water is retained so that it can be fitted and removed, and the shaft hole 21 a is closed by the inner member 3.

In the bearing portion 21, the water supply shaft 11 is inserted into the shaft hole 21a from the opening end (upper side in FIG. 1) on the water supply shaft insertion side, and the tip is projected from the opening end on the liquid container side. In the state where the liquid container is connected to the water server, the water supply shaft 11 inserted in the bearing portion 21 is pressed against the inner peripheral surface of the bearing portion 21 in a watertight state, so that the drinking water in the liquid container is discharged from the bearing portion 21. It does not leak outside the machine (see Fig. 8).

The outer edge portion 22 is continuous with the peripheral edge of the top surface portion 20 and is thinly formed in a tubular shape having a circular cross section, and a mounting recess 22a into which the protrusion 12 of the tubular mouth portion 10 is fitted is formed on the inner peripheral surface in the circumferential direction. When the bottle cap 1 is attached to the tubular mouth portion 10 (FIG. 2), the bottle cap 1 is elastically deformed according to the shape of the tubular mouth portion 10 and is closely attached to the outer peripheral surface.

The inner member 3 is formed as a bottomed cylindrical body that is retained in a watertight state so as to be removably fitted so as to close the opening end of the bearing portion 21 on the liquid container side, and is opened toward the inside of the bearing portion 21. The open end is bent inward in the radial direction and is formed to be engageable with the tip of the water supply shaft 11. While the inner member 3 is held at the opening end of the bearing portion 21 on the liquid container side, the water supply shaft 11 inserted into the bearing portion 21 is fitted into the opening end, and the opening end is engaged to feed water. It is integrated with the shaft 11 (see FIG. 8).

As shown in FIGS. 1 to 7, the water blocking member 4 is made of non-foamed synthetic resin, and has a disk-like shape in a plan view with a circular insertion hole 4a into which the bearing portion 21 is inserted at the center thereof. Is formed as. Specifically, the water-blocking member 4 is water-tight on the inner peripheral surface of the tubular mouth 10 and the inner portion 40 that is pressed against the outer peripheral surface of the bearing portion 21 in a water-tight state and fitted into the bearing portion 21. It is composed of an outer side portion 41 that is press-contacted, a bottom portion 42 that is continuous with the inner side portion 40 and the outer side portion 41, and a collar portion 43 that is provided so as to project on the peripheral edge of the outer side portion 41. 21 is inserted and attached to the main body member 2, and is fitted into the bearing portion 21 so as to be positioned below the top surface portion 20.

The water blocking member 4 is formed as a resin molded body using a non-foaming synthetic resin, and examples of such non-foaming synthetic resin include polyethylene, polyethylene terephthalate, polyvinyl chloride, polystyrene, polypropylene, polyester and the like. Be done. In particular, in this embodiment, since the main body member 2 and the inner member 3 are similarly formed of a resin molded body using a non-foaming synthetic resin, the water blocking member 4 is made of the same material as the main body member 2 and the inner member 3. It is preferable to form more because it can reduce the manufacturing cost.

The inner portion 40 is formed in a tubular shape having a predetermined height in the vertical direction in a circular shape in a plan view, has a smooth peripheral side surface at least on a radial inner side (center direction of the insertion hole 4a), and A fitting rib 40a is formed on the lower peripheral edge of the liquid container side so as to project inward in the radial direction. The fitting rib 40a is provided as a projection formed along the circumferential direction so that the surface (upper surface) on the water supply shaft insertion side is tapered. In the state where the water blocking member 4 is attached to the main body member 2, the fitting rib 40a of the inner side portion 40 is elastically deformed by the bearing portion 21 inserted into the insertion hole 4a, and the fitting rib 40a becomes the bearing portion 21. By being pressed against the outer peripheral surface in a watertight state, the inner portion 40 is pressed against the outer peripheral surface of the bearing portion 21 and fitted into the bearing portion 21 (see FIGS. 1 and 8 and the like). ..

The outer side portion 41 is formed in a cylindrical shape having a predetermined height in the vertical direction in a circular shape in a plan view, and has a smooth peripheral side surface at least on the radially outer side surface (direction opposite to the center of the insertion hole 4a). A water blocking rib 41a is formed on the lower edge of the side surface on the liquid container side so as to project radially outward. The water stop rib 41a is provided as a protrusion formed along the circumferential direction so that the surface (lower surface) on the liquid container side is tapered. When the bottle cap 1 is attached to the tubular mouth portion 10, the opening end (projection portion 12) of the tubular mouth portion 10 is inserted into the space between the inner peripheral surface of the outer edge portion 22 and the outer side portion 41 to attach the recessed portion. 22 a, while the water stop rib 41 a of the outer portion 41 is elastically deformed and abutted against the inner peripheral surface of the tubular mouth portion 10 in a pressed state, the inside of the tubular mouth portion 10 is The outer portion 41 is pressed against the peripheral surface in a watertight state, and the tubular mouth portion 10 is sandwiched between the inner peripheral surface of the outer edge portion 22 and the outer portion 41.

The water blocking member 4 of the present embodiment is formed such that the height in the vertical direction of the outer portion 41 is higher than that of the inner portion 40. By forming the water blocking member 4 in this manner, the water blocking member 4 is attached to the main body member 2 without the inner portion 40 interfering with a continuous portion of the top surface portion 20 and the bearing portion 21. It can be placed closer to 20.

The bottom portion 42 is integrally formed so as to be continuous with the lower edge of the inner portion 40 and the outer portion 41 on the liquid container side, and forms the bottom surface of the water blocking member 4.

The flange portion 43 is formed so as to project radially outward on the peripheral edge of the outer side surface 41 on the water supply shaft insertion side, and extends along the circumferential direction. The collar portion 43 is pressed against the inner peripheral surface of the outer edge portion 22 of the main body member 2 with the water blocking member 4 attached to the main body member 2, and the bottle cap 1 is attached to the tubular mouth portion 10. Then, the tip of the opening end (projection 12) of the tubular mouth 10 that is narrowed between the inner peripheral surface of the outer edge portion 22 and the outer portion 41 is brought into contact, or the collar portion 43 and the tubular mouth portion. A gap may be formed between the open end (protrusion 12) 10 and the tip.

The groove portion 44 is formed between the inner side portion 40 and the outer side portion 41 as a groove having an annular shape in a plan view which is opened on the water supply shaft insertion side. In this way, the water blocking member 4 of the present embodiment is a disk-shaped member in plan view having a circular insertion hole 4a in the center, and the cylindrical inner portion 40 and outer portion 41 are separated from each other. It is formed so as to be continuous with the bottom portion 42 and to have a groove portion 44 having an annular shape in plan view between the inner portion 40 and the outer portion 41.

As shown in FIG. 8, when connecting the liquid container to the water server, lower the liquid container with the bottle cap 1 previously attached to the opening end (projection 12) of the tubular mouth 10 from above the water server. The water supply shaft 11 is inserted into the bearing portion 21 through the shaft hole 21a exposed on the top surface of the main body member 2. The water supply shaft 11 inserted into the bearing portion 21 is inserted into the shaft hole 21a in a state where the outer peripheral surface thereof is watertightly crimped. When the tip end of the water supply shaft 11 contacts the inner member 3 fitted to the opening end of the bearing portion 21, the tip end of the water supply shaft 11 moves to the opening end of the inner member 3 as the liquid container moves downward. The water supply shaft 11 and the inner member 3 are integrated by being inserted, and eventually the tip of the water supply shaft 11 projects from the opening end of the bearing portion 21 on the liquid container side.

When the liquid container is removed from the water server, contrary to the case of connecting the liquid containers, the liquid container is moved upward to move the water supply shaft 11 and the inner member 3 integrally, and eventually the bearing portion 21. The inner member 3 is fitted into the opening end of the liquid container side. Then, after contacting the open end of the bearing portion 21 and completely fitting the inner member 3, the water supply shaft 11 is detached from the inner member 3 and the water supply shaft 11 is pulled out from the bearing portion 21.

As described above, the bottle cap 1 of the present embodiment is used by being attached to the tubular mouth portion 10 of the liquid container for a water server, and is formed on the top surface portion 20 forming the top surface and the central portion of the top surface portion 20. A bottle cap 1 in which a bearing portion 21 into which the water supply shaft 11 of the water server is inserted and an outer edge portion 22 formed on the peripheral edge of the top surface portion 20 and abutting on the outer peripheral surface of the tubular mouth portion 10 are integrally formed In, a liquid container is connected to the water server and an inner portion 40 that is formed of a non-foamed synthetic resin in a disk shape in a plan view, is pressed against the outer peripheral surface of the bearing portion 21 in a watertight state, and is fitted into the bearing portion 21. Since the water stop member 4 having the outer side portion 41 pressed against the inner peripheral surface of the tubular mouth portion 10 in a water-tight state in the closed state is provided, the quality of drinking water in the liquid container is prevented from being deteriorated. At the same time, the water stopping ability can be improved.

That is, in the bottle cap 1 of the present embodiment, since the water blocking member 4 is formed of non-foaming synthetic resin, when the bottle cap 1 is attached to the liquid container, the water blocking member 4 is liable to be broken by liquid or foreign matter. It is possible to prevent the quality of drinking water from being deteriorated without being mixed in the container or causing the odor of the water blocking member 4 to be transferred to the drinking water in the liquid container with the bottle cap 1 attached to the liquid container. .. Further, the water blocking member 4 is attached to the main body member 2 by the inner portion 40 being pressed against the outer peripheral surface of the bearing portion 21 in a watertight state and fitted into the bearing portion 21, and the outer portion 40 is attached to the tubular portion. Since it is pressure-contacted to the inner peripheral surface of the portion 10 in a watertight state, it can be easily attached to and detached from the main body member 2, and the bottle cap 1 is insufficiently attached and the water blocking member 4 and the tubular mouth portion. Even if a gap is formed between the opening end and the tip of the opening end 10, the drinking water in the liquid container does not leak out of the machine.

In particular, in the bottle cap 1 of the present embodiment, the water blocking rib 41a that is brought into contact with the inner peripheral surface of the tubular mouth portion 10 while being pressed against the liquid container side periphery of the outer portion 41 of the water blocking member 4. Since the water blocking rib 41a is formed, the water tightness with the tubular mouth 10 can be enhanced, and the water blocking rib 41a is arranged at the peripheral edge on the liquid container side to open the tubular mouth 10. The water stopping function of the water stopping rib 41a can be reliably exerted against the vertical movement of the tip of the end.

Further, the water blocking member 4 of the present embodiment is formed with the fitting rib 40a which is abutted against the outer peripheral surface of the bearing portion 21 while being pressed against the outer peripheral surface of the inner portion 40 on the liquid container side. The rib 40a increases the fitting strength of the inner portion 40 with respect to the bearing portion 21 to ensure the water blocking function of the fitting rib 41a, and prevents the water blocking member 4 from falling off when the bottle cap 1 is transported. In addition to being prevented, the water blocking member 4 can be easily collected without remaining at the open end of the tubular mouth 10 when the bottle cap 1 is removed from the liquid container.

Further, in the water blocking member 4 of the present embodiment, the flange portion 43 that is pressed against the inner peripheral surface of the outer edge portion 22 is formed at the peripheral edge of the outer portion 41 on the water supply shaft insertion side, so that the inner portion 40 has the bearing portion 21. In addition to being pressed against the outer edge portion 22 with the collar portion 43, the holding property of the water blocking member 4 with respect to the main body member 2 is improved, and when the bottle cap 1 is transported, the water blocking member 4 is It can be prevented from falling off, and when the bottle cap 1 is removed from the liquid container, the water blocking member 4 can be easily collected without remaining at the opening end of the tubular mouth 10.

Further, in the water blocking member 4 of the present embodiment, since the groove portion 44 having an annular shape in plan view is formed between the inner side portion 40 and the outer side portion 41, the water blocking member 4 is different from the case where the groove portion 44 is not provided. The weight can be reduced, and the manufacturing cost can be reduced.

The bottle cap 1 of this embodiment is not limited to the above-mentioned embodiment, and various modifications can be made without departing from the object of the present invention.

That is, in the bottle cap 1 of the above-described embodiment, the shape in which the collar portion 43 is formed on the outer side portion 41 of the water blocking member 4 and the groove portion 44 is provided between the inner side portion 40 and the outer side portion 41 has been described. The shape of the water blocking member 4 is not limited to this, and may be any shape as long as it is formed of a non-foamed synthetic resin into a disc shape in plan view having the inner portion 40 and the outer portion 41.

For example, like the water blocking member 104 of the embodiment shown in FIGS. 9 and 10, unlike the above-described embodiment, the outer portion 141 may have a shape without a collar portion, and in the embodiment shown in FIGS. Unlike the above-described embodiment, the water blocking member 204 may have a shape having no groove between the inner portion 240 and the outer portion 241.

Further, like the water blocking member 304 of the embodiment shown in FIGS. 13 and 14, while providing the groove portion 344 between the inner portion 340 and the outer portion 341, the inner portion 340 and the outer portion 341 are connected in the groove portion 344. The ribs 345, 345... May have a shape such that they are erected in the radial direction. By forming the groove 344 by providing the rib 345 in this manner, the outer portion 341 is centered at the opening end (projection 12) of the tubular mouth portion 10 with the water blocking member 4 attached to the body portion 2. It can be prevented from being pressed and deformed toward the direction, and the water stop function by the water stop rib 341a can be surely exhibited.

DESCRIPTION OF SYMBOLS 1 Bottle cap 2 Main body member 3 Inner member 4 Water stop member 4a Insertion hole 10 Cylindrical mouth part 11 Water supply shaft 12 Protrusion part 20 Top surface part 21 Bearing part 21a Shaft hole 22 Outer edge part 22a Mounting recess 40 Inner part 40a Fitting rib 41 Outside part 41a Water stop rib 42 Bottom part 43 Collar part 44 Groove part

Claims (5)

A top surface portion that is used by being attached to a cylindrical mouth portion of a liquid container for a water server and forms a top surface, a bearing portion that is formed in a central portion of the top surface portion and into which a water supply shaft of a water server is inserted, In a bottle cap formed integrally with an outer edge portion formed on the peripheral edge of the surface portion and in contact with the outer peripheral surface of the tubular mouth portion,
A state in which a liquid container is connected to a water server, and an inner portion formed of a non-foamed synthetic resin in a disk shape in a plan view, pressed against the outer peripheral surface of the bearing portion in a watertight state and fitted into the bearing portion. And a water stop member having an outer portion that is pressed against the inner peripheral surface of the tubular mouth portion in a watertight state,
A bottle cap characterized by that. The bottle cap according to claim 1, wherein the water blocking member has a water blocking rib formed on a peripheral edge of the outer portion on the liquid container side, the rib being in contact with the inner peripheral surface of the tubular opening in a pressed state. .. The bottle according to claim 1 or 2, wherein the water blocking member has a fitting rib formed on a peripheral edge of the inner portion on the liquid container side, the fitting rib being in contact with the outer peripheral surface of the bearing portion in a pressed state. cap. The bottle according to any one of claims 1 to 3, wherein the water shut-off member has a flange portion formed on a peripheral edge of the outer portion on the water supply shaft insertion side, the flange portion being in pressure contact with the inner peripheral surface of the outer edge portion. cap. The bottle cap according to any one of claims 1 to 4, wherein the water blocking member has an annular groove portion in a plan view formed between the inner side portion and the outer side portion.

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