JP2016155569A - Bottle cap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bottle cap in which holding property of an inner member by a bearing part and cut-off performance are improved.SOLUTION: A bottle cap 1 is attached to a cylindrical mouth part 10 of a liquid container for a water server comprises: a body member 2 in which a cylindrical bearing part 21 into which a water supply shaft 11 of a water server is inserted, is formed on a center; and a bottomed cylindrical inner member 3 which is detachably held to an opening end of the bearing part 21 on a liquid container side. The body member 2 includes in a shaft hole 21a of the bearing part 21: a first pressure contact part 23a formed on the opening end of the liquid container side, and brought into pressure contact with the inner member 3; and a second pressure contact part 24a formed in a radial inside direction and a water supply shaft insertion side, relative to the first pressure contact part 23a, and brought into pressure contact with the water supply shaft 11.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a bottle cap technology, and more specifically, a cylindrical bearing portion that is used by being attached to a cylindrical mouth portion of a water container for a water server and into which a water supply shaft of a water server is inserted at a central portion. The present invention relates to a bottle cap having a formed main body member and a bottomed cylindrical inner member that is detachably held at an opening end of a bearing portion on the liquid container side.

  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. Normally, a liquid container connected to this type of water server is used with a bottle cap attached to the cylindrical mouth, and when the liquid container is connected to the water server, the water supply shaft of the water server is It is inserted into the liquid container through the bottle cap, and the drinking water in the liquid container is supplied to the spout through the water supply shaft without leaking out of the machine.

  As a conventional bottle cap, for example, as disclosed in Patent Literature 1 or Patent Literature 2, a main body member in which a cylindrical bearing portion into which a water supply shaft of a water server is inserted is formed at the center portion, and a bearing portion The bottom end of the main body member is formed in a cylindrical mouth portion with a bearing portion protruding into the cylindrical mouth portion. It is elastically deformed according to the shape of and is fixed to the outer peripheral side of the cylindrical mouth portion. When the liquid container is connected to the water server, first, the tip end of the water supply shaft is fitted into the inner member, and then the water supply shaft is inserted into the liquid container via the bearing portion. On the other hand, when the liquid container is removed from the water server, the inner member is again fitted into the opening end of the bearing portion on the liquid container side and returned to the original state.

JP 2010-89842 A JP 2005-335713 A

  By the way, in the conventional bottle cap described above, the inner peripheral surface of the opening end on the liquid container side, for example, is configured so as to be surely pressed against the water supply shaft when the liquid container is connected to the water server. The inner diameter of the opening end on the liquid container side is smaller than the outer diameter of the water supply shaft, such as by forming a water stop rib on the liquid container side, and the liquid container side opening at the water supply shaft inserted into the bearing portion The ends are formed so as to be elastically deformed and pressed in the diameter increasing direction. As described above, the bearing portion of the conventional bottle cap is formed so that the opening end of the bearing portion on the liquid container side holds the inner member with water, and the water supply shaft with the same structure.

  Therefore, for example, after removing the liquid container from the water server, if the opening end on the liquid container side of the bearing part does not return to its original shape (inner diameter) while elastically deforming in the diameter expansion direction, the inner member is fitted. If the condition becomes insufficient, the inner member may fall into the liquid container under its own weight, or the drinking water in the liquid container may leak out of the machine. When connecting the two, there is a problem that the inner member is pushed out at the tip end portion of the water supply shaft and cannot be inserted into the inner shaft.

  Therefore, the present invention relates to a bottle cap that solves the above-described conventional problems, and an object of the present invention is to provide a bottle cap that improves the retainability and water stoppage of the inner member by the bearing portion.

  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, a main body member that is used by being attached to a cylindrical mouth portion of a water container for a water server and in which a cylindrical bearing portion into which a water supply shaft of the water server is inserted is formed in the center portion; In the bottle cap having a bottomed cylindrical inner member that is detachably held at the opening end of the bearing portion on the liquid container side, the body member is liquid in the shaft hole of the bearing portion. A first pressure contact portion that is formed at the opening end on the container side and is in pressure contact with the inner member, and is formed on the water supply shaft insertion side and radially inward from the first pressure contact portion, and is in pressure contact with the water supply shaft. A second pressure contact portion.

  According to a second aspect of the present invention, the bearing portion includes an outer cylinder portion in which the first press-contact portion is formed on an inner peripheral surface, and a second inner portion disposed on a radially inner position of the outer cylinder portion. And an inner tube portion on which the pressure contact portion is formed.

  According to a third aspect of the present invention, the first pressure contact portion is pressed against a water stop rib extending along the circumferential direction on the outer peripheral surface of the inner member.

  According to a fourth aspect of the present invention, the second pressure contact portion is formed on the water supply shaft insertion side with respect to the inner member held at the opening end on the liquid container side.

  According to a fifth aspect of the present invention, the second pressure contact portion is formed to protrude in a rib shape in the radial direction at the opening end on the liquid container side.

  As an effect of the present invention, it is possible to improve the retainability and water stoppage of the inner member by the bearing portion.

It is sectional drawing of the main body member and inner member of the bottle cap which concern on one Example of this invention. It is sectional drawing which showed the state by which the main body member was mounted | worn with the cylindrical opening part. It is a cross-sectional perspective view of a main body member. It is a partial expanded sectional view of a main body member and an inner member. It is sectional drawing which shows the state by which the water supply shaft was inserted in the main body member. It is the perspective view which showed the assembly state of the bottle cap containing a cover member. It is sectional drawing which showed the state with which the bottle cap containing a cover member was mounted | worn with the cylindrical opening part. It is sectional drawing which showed the state by which a liquid container is connected with a water server.

  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 10 of the water container for a water server. A main body member 2 in which a cylindrical bearing portion 21 into which a water supply shaft 11 of a water server is inserted is formed, and an inner member 3 etc. that is removably held at the opening end of the bearing portion 21 on the liquid container side. It is configured. In addition, the bottle cap 1 of a present Example is comprised as a bottle cap with a cover by which the main body member 2 was assembled | attached integrally in the interior space of the cover-like cover member 4 (refer FIG.6 and FIG.7). .

  The cylindrical mouth portion 10 protrudes to one side of a liquid container (not shown) configured as a cartridge container filled with a liquid such as drinking water, and the main body member 2 is attached to the tubular mouth portion 10. In this state, the liquid container is connected to the water server (see FIGS. 5 and 8). The opening end of the cylindrical mouth portion 10 is chamfered into a gentle R shape, and a protruding portion 12 that protrudes in the radial direction from the outer peripheral side is formed. The bottle cap 1 can be easily attached to the cylindrical mouth portion 10. It is configured as follows. The protrusion 12 is fitted to a mounting recess 22a formed in the main body member 2 described later in a state where the bottle cap 1 is mounted on the cylindrical mouth portion 10.

  The main body member 2 is configured by integrally forming a cylindrical bearing portion 21 formed at the center of the top surface 20 and an outer edge portion 22 formed at the periphery of the top surface 20. The bearing portion 21 includes an outer cylinder portion 23 having a circular cross section that is continuous with the top surface 20, and an inner cylinder having a circular cross section that is continuous with the top surface 20 and disposed at a radially inner position of the outer cylinder portion 23. A shaft hole 21a into which the water supply shaft 11 is inserted is formed.

  The bearing portion 21 has an inner tube portion 24 opened on the top surface 20 and an outer tube portion 23 and an inner tube portion 24 at the opening end on the liquid container side (the lower side in FIG. 1) opposite to the top surface 20. Is opened. The bearing portion 21 has the water supply shaft 11 inserted into the shaft hole 21 a from the inner tube portion 24 opened in the top surface 20, and protrudes from the open ends of the outer tube portion 23 and the inner tube portion 24. In addition, the bearing portion 21 is held at the opening end of the outer cylinder portion 23 on the liquid container side so that an inner member 3 (described later) can be fitted and removed in a watertight state, and the shaft hole 21 a is closed by the inner member 3.

  The outer cylindrical portion 23 extends in a cylindrical shape from the top surface 20 along the insertion direction of the water supply shaft 11 (the vertical direction of the arrow in FIG. 1), and the inner member 3 (of the inner member 3) A first pressure contact portion 23a that is pressure-contacted with the water stop rib 33) is formed. The first pressure contact portion 23a of the present embodiment is formed along the circumferential direction as a smooth surface facing the inside of the shaft hole 21a, and is provided in a region extending from the opening end to the inner direction of the bearing portion 21, as will be described later. It is formed at a position where it does not come into contact (pressure contact) with the water supply shaft 11 inserted into the inner cylinder portion 24.

  The outer cylinder portion 23 is formed so that the inner diameter is smaller than the outer diameter (including the water stop ribs 33) of the inner member 3 at least at a location where the first pressure contact portion 23a at the opening end on the liquid container side is formed. The inner member 3 inserted from the opening end of the outer cylinder portion 23 on the liquid container side is elastically deformed (the water blocking rib 33) is elastically deformed by being pressed against the first pressure contact portion 23a. The inner member 3 is fitted into the opening end on the liquid container side in a watertight state. Thus, in the bearing portion 21 of the present embodiment, the inner member 3 is held water-stopped by the outer tube portion 23.

  The outer cylinder portion 23 is formed with a stopper 23b that can be engaged with the inner member 3 on the inner peripheral surface at a position higher than the first pressure contact portion 23a. The stopper 23b is formed along the circumferential direction as a protrusion having a tapered section so as to gradually reduce the diameter toward the inner direction of the bearing portion 21, and the inner member 3 (of the inner member 3 inserted from the lower side of the outer cylinder portion 23). It is formed to be able to engage with the outer protrusion 31).

  In addition, the outer cylinder portion 23 is continuous with a peripheral wall portion 25 in which the outer peripheral surface of the opening end on the liquid container side extends sideways, and is continued with a peripheral flange 26 described later via the peripheral wall portion 25. The peripheral wall portion 25 is formed with a horizontal plane extending in parallel with the top surface 20 and a tapered surface extending so as to gradually increase in diameter from the horizontal plane toward the peripheral flange 26, and is held by the outer cylinder portion 23. The inner member 3 is brought into contact with the horizontal surface of the peripheral wall portion 25. Further, by forming the peripheral wall portion 25 in this way, a concave groove is formed on the top surface 20 toward the liquid container side along the circumferential direction.

  The inner cylinder portion 24 extends in a cylindrical shape from the top surface 20 along the insertion direction of the water supply shaft 11, and is in contact with the outer peripheral surface of the water supply shaft 11 on the inner peripheral surface of the opening end on the liquid container side. A pressure contact portion 24a is formed. The second pressure contact portion 24a faces the shaft hole 21a and is formed along the circumferential direction as a rib-like protrusion protruding in the radial direction, and is closer to the water supply shaft insertion side than the first pressure contact portion 23a. (Upper side in FIG. 1) and provided in a region extending from the opening end on the radially inner side to the inner direction of the bearing portion 21.

  The inner cylinder portion 24 is formed so that the inner diameter is smaller than the outer diameter of the water supply shaft 11 at least at a location where the second pressure contact portion 24a at the opening end on the liquid container side is formed. 24a is press-contacted with the water supply shaft 11 inserted into the internal space of the inner cylinder portion 24 (see FIG. 5), and the opening end on the liquid container side is elastically deformed in the diameter-expanding direction, so that the inner cylinder portion 24 and the water supply shaft are The outer peripheral surface of 11 is crimped in a watertight state. Thus, in the bearing portion 21 of the present embodiment, the water supply shaft 11 is held water-stopped by the inner cylinder portion 24. In addition, the second pressure contact portion 24a has an edge on the water supply shaft insertion side formed in a tapered shape, and when the water supply shaft 11 is inserted, the water supply shaft 11 contacts the second pressure contact portion 24a with a small amount of resistance (sliding contact). ).

  The inner cylinder part 24 is disposed at a radially inner position of the outer cylinder part 23, and the outer cylinder part 23 and the inner cylinder part 24 form a double cylindrical structure. Specifically, the inner cylinder part 24 is formed such that the axial length L2 from the top surface 20 to the opening end on the liquid container side is shorter than the axial length L1 of the outer cylinder part 23. The opening end on the container side is formed so as not to protrude from the opening end of the outer cylinder portion 23 (see FIG. 4). The difference (L1-L2) in the axial length between the outer cylinder part 23 and the inner cylinder part 24 is that at least the inner member 3 is not obstructed by the inner cylinder part 24 and the opening end of the outer cylinder part 23 on the liquid container side. The length is secured so that the length can be fitted.

  In a state where the inner member 3 is fitted to the outer cylindrical portion 23, the inner member 3 (the outer protrusion 31) is brought into contact with the opening end of the inner cylindrical portion 24 on the liquid container side, and the upper end (main body portion) of the inner member 3 is contacted. 30 open ends) are inserted into the internal space. As described above, the upper end of the inner member 3 is inserted into the inner cylinder portion 24, so that the water supply shaft 11 inserted into the inner cylinder portion 24 can be securely inserted into the inner member 3 (FIGS. 5 and 5). 8).

  Moreover, the inner cylinder part 24 is arrange | positioned so that it may mutually spaced apart in the radial direction with the outer cylinder part 23, and the space S is formed in separation of the outer cylinder part 23 and the inner cylinder part 24 (refer FIG. 4). ). As described above, when the water supply shaft 11 is inserted into the inner space of the inner cylinder part 24 as described above, the outer cylinder part 23 and the inner cylinder part 24 are disposed. It is possible to secure a space (space) for elastically deforming the open end of the lens in the diameter-enlarging direction.

  The outer edge portion 22 extends from the peripheral edge of the top surface 20 along the insertion direction of the water supply shaft 11, and a mounting recess 22 a in which the protruding portion 12 of the cylindrical mouth portion 10 is fitted to the inner peripheral surface is provided in the circumferential direction. Are formed along. Further, the outer edge portion 22 is formed with a stepped portion 22b that is engaged with a tool (for example, a decapper or the like) for removing the main body member 2 from the cylindrical mouth portion 10 on the outer peripheral surface. The step portion 22b is formed along the circumferential direction as a notch-shaped step having a downward horizontal surface.

  Between the bearing portion 21 and the outer edge portion 22, a peripheral flange 26 is erected along the insertion direction of the water supply shaft 11 from the top surface 20, and a locking rib 26 a is circumferentially provided on the outer peripheral surface of the peripheral flange 26. It is formed along. As described above, the peripheral flange 26 is continuous with the peripheral wall portion 25 that is continuous from the outer tube portion 23.

  In a state where the bottle cap 1 is attached to the cylindrical mouth portion 10 (see FIG. 2 and the like), the opening end (projection portion 12) of the cylindrical mouth portion 10 is the inner peripheral surface of the outer edge portion 22 and the outer peripheral surface of the peripheral flange 26. And is fitted into the mounting recess 22a. At that time, the outer edge portion 22 is elastically deformed in accordance with the shape of the open end (projection portion 12) of the cylindrical mouth portion 10, and the water stop rib 26a is pressed against the inner peripheral surface of the cylindrical mouth portion 10. Thus, the cylindrical mouth portion 10 is sandwiched between the inner peripheral surface of the outer edge portion 22 and the outer peripheral surface of the peripheral flange 26, and the main body member 2 is attached to the cylindrical mouth portion 10 in a watertight state.

  The inner member 3 is detachably held in a watertight manner so as to close the liquid container side opening end of the outer cylindrical portion 23 of the bearing portion 21, and specifically, the outer periphery of the bottomed cylindrical main body portion 30. The outer peripheral wall 30a is formed on the outer peripheral wall 30a on the opening end side of the main body 30 and the outer protrusion 31 is formed on the outer peripheral surface of the outer peripheral wall 30a on the closed end side of the main body 30. It extends along the circumferential direction. Further, on the outer peripheral surface of the outer peripheral wall 30a, a water stop rib 33 is extended in the vicinity of the closing rod 32 along the circumferential direction.

  The main body portion 30 is opened toward the inner direction of the bearing portion 21, and the opening end is bent inward in the radial direction so as to be engageable with a concave portion formed at the tip of the water supply shaft 11. . As described above, in the inner member 3, the water supply shaft 11 inserted into the inner cylinder portion 24 is fitted into the opening end while being held at the opening end on the liquid container side of the outer cylinder portion 23 of the bearing portion 21. The opening end and the concave portion are engaged with each other so as to be integrated with the water supply shaft 11 (see FIG. 5).

  The outer protrusion 31 protrudes along the circumferential direction from the outer peripheral wall 30a, and is formed so as to be able to engage with a stopper 23b formed on the outer cylinder portion 23 of the bearing portion 21 when the liquid container is connected to the water server. ing. The outer protrusion 31 is formed in a tapered shape so that the tip gradually increases in diameter from the water supply shaft insertion side of the inner member 3, and when the liquid container is removed from the water server, the stopper 23b also formed in the tapered shape. Is formed so that the inner member 3 can be easily fitted to the opening end of the outer cylinder portion 23 on the liquid container side.

  The closing rod 32 is brought into contact with the opening end of the outer cylinder portion 23 in a state where the inner member 3 is fitted to the opening end of the outer cylinder portion 23 of the bearing portion 21. Further, the water blocking rib 33 protrudes along the circumferential direction from the outer peripheral wall 30a, and, as described above, the outer cylinder with the inner member 3 held at the liquid container side opening end of the outer cylinder portion 23. The first pressure contact portion 23 a formed on the portion 23 is pressed.

  As shown in FIGS. 6 and 7, the cover member 4 is formed in a cylindrical shape, and is thinned into a cylindrical shape having a circular cross section that is continuous with the top surface 40 formed in a substantially flat surface and the periphery of the top surface 40. The formed skirt portion 41 is integrally formed. On the inner peripheral surface of the skirt portion 41, a locking recess 41 a is formed along the circumferential direction in which the main body member 2 (the outer edge portion 22) is fitted at a corner portion that is a continuous portion with the top surface 40. Yes. In the bottle cap 1 of this embodiment, the main body member 2 is inserted into the inner space from the lower opening end of the skirt portion 41 of the cover member 4, and the outer edge portion 22 of the main body member 2 is fitted into the locking recess 41 a of the skirt member 4. By combining, the main body member 2 is assembled to the cover member 4 integrally.

  The skirt portion 41 is formed with a concave groove 41b extending continuously in the axial direction and the circumferential direction on the outer peripheral surface. The concave groove 41b extends while curving from the open end of the skirt portion 41 toward the top surface 40, and is formed so as to extend in the circumferential direction at the midway portion and extend over substantially the entire circumference. Is done. A tongue-shaped grip piece 42 is formed at the edge of the open end of the skirt portion 41, and the grip piece 42 is pulled up in the direction of the top surface 40, whereby the skirt portion 41 is broken along the concave groove 41b. The

  In the state where the main body member 2 and the cover member 4 are assembled together, the cover member 4 surrounds the top surface 20 and the outer edge portion 22 of the main body member 2, and a shaft hole opened to the top surface 20 a by the top surface 40. 21 a is closed, and the outer edge portion 22 is completely covered by the skirt portion 41. Thus, by constituting as a bottle cap with a cover in which the main body member 2 is integrally assembled in the inner space of the cover-like cover member 4 with a dome, it is attached to the cylindrical mouth portion 10 of the liquid container ( 7), the main body member 2 is not exposed by the cover member 4, so that hygiene management and quality maintenance when transporting and storing the liquid container are easy, and the quality of the contents in the liquid container is prevented from being altered. Openability (virginity) can be improved.

  Next, the operation for connecting the liquid container with the bottle cap 1 attached to the water server will be described in detail below.

  First, the bottle cap 1 in which the main body member 2 and the cover member 4 are integrally assembled in advance on the opening end (projection portion 12) of the cylindrical mouth portion 10 is attached to the liquid container before being connected to the water server, That is, the main body member 2 is fitted in a watertight state on the outer peripheral side of the cylindrical mouth portion 10 with the bearing portion 21 protruding into the cylindrical mouth portion 10, and the main body member 2 is completely covered from above. The cover member 4 is fixed to the cylindrical mouth portion 10 (see FIG. 7). In this state, the cover member 4 has the skirt portion 41 crimped to the outer peripheral surface of the cylindrical mouth portion 10.

  As shown in FIG. 8, when connecting the liquid container to the water server, first, the cover member 4 is broken and peeled off from the cylindrical mouth portion 10 to expose the main body member 2 (see FIG. 2 and the like). ), The liquid container is moved downward from above the water server, and the water supply shaft 11 is inserted into the inner cylinder portion 24 through the shaft hole 21a exposed on the top surface 20 of the main body member 2 (FIG. 8A). . In such a state, the water stop 33 rib of the inner member 3 is pressed against the first pressure contact portion 23a of the outer cylindrical portion 23, and the inner member 3 is fitted in a watertight state to the opening end on the liquid container side.

  The water supply shaft 11 inserted into the inner cylinder part 24 is pressed against the second pressure contact part 24a while elastically deforming the opening end of the inner cylinder part 24 on the liquid container side in the diameter increasing direction, and the outer peripheral surface is the inner cylinder part 24. And inserted in a pressure-tight state in a watertight state. When the tip end of the water supply shaft 11 comes into contact with the inner member 3 provided at the open end of the outer cylinder portion 23, the inner cylinder 3 is pushed up against the outer cylinder portion 23 as the liquid container moves downward. The water supply shaft 11 protrudes from the opening end of the portion 24 on the liquid container side (FIG. 8B).

  Eventually, when the outer protrusion 31 of the inner member 3 is engaged with the stopper 23b of the outer cylinder portion 23, only the position of the inner member 3 is stopped, and the distal end portion of the water supply shaft 11 is inserted into the opening end of the inner member 3. Thus, the water supply shaft 11 and the inner member 3 are integrated (FIG. 8C). Thereafter, when the water supply shaft 11 is further inserted, the inner member 3 is detached from the inner cylinder portion 24, and the water supply shaft 11 is protruded into the cylindrical mouth portion 10 from the opening end of the outer cylinder portion 23 on the liquid container side. In this state, the water supply shaft 11 is held still by the inner cylinder portion 24 (FIG. 8D).

  As described above, the bottle cap 1 according to the present embodiment is used by being attached to the cylindrical mouth portion 10 of the liquid container for the water server, and the cylindrical bearing portion into which the water supply shaft 11 of the water server is inserted in the central portion. In a bottle cap 1 having a main body member 2 formed with 21 and a bottomed cylindrical inner member 3 that is detachably held at an opening end of the bearing portion 21 on the liquid container side, the main body member 2 Is formed in the shaft hole 21a of the bearing portion 21 at the opening end on the liquid container side and is in pressure contact with the inner member 3, and closer to the water supply shaft insertion side than the first pressure contact portion 23a. And since it has the 2nd press-contact part 24a formed in radial direction inner side and press-contacted with the water supply axis | shaft 11, since the retainability of the inner member 3 by the bearing part 21 and a water stop can be improved. is there.

  That is, the bottle cap 1 of the present embodiment is provided with a first pressure contact portion 23a that is in pressure contact with the inner member 3 and a second pressure contact portion 24a that is in pressure contact with the water supply shaft 11 at different positions, respectively. At the opening end of the bearing portion 21 on the liquid container side, the inner member 3 is water-stopped and retained at the first pressure contact portion 23a, and the water supply shaft 11 is water-stopped and retained at the second pressure contact portion 24a. Therefore, after removing the liquid container from the water server, even if the opening end on the liquid container side of the bearing portion 21 is elastically deformed in the diameter increasing direction and does not return to the original shape (inner diameter), The inner member 3 can be securely fitted by the first pressure contact portion 23a that is not pressed, and the inner member 3 falls into the liquid container by its own weight, or the drinking water in the liquid container leaks out of the machine. Or Preventing, also, it can be re even when coupling the liquid container to the water dispenser, inserted securely fit the tip of the water supply shaft 11 to the inner part 3.

  In particular, the bottle cap 1 according to the present embodiment includes an outer cylinder portion 23 in which a first press-contact portion 23a is formed on the inner peripheral surface of the bearing portion 21, and an inner radial position of the outer cylinder portion 23. Since the inner cylinder part 24 in which the second press-contact part 24a is formed on the peripheral surface is provided, the outer cylinder part can be obtained by making the bearing part 21 a double cylindrical structure by the outer cylinder part 23 and the inner cylinder part 24. The water supply shaft 11 can be reliably water-stopped by the second pressure contact portion 24 a of the inner cylinder portion 24 while the inner member 3 is securely water-stopped by the first pressure contact portion 23 a of 23.

  Further, since the first pressure contact portion 23 a is pressed against the outer circumferential surface of the inner member 3 with the water stop rib 33 extending along the circumferential direction, the water tightness between the first pressure contact portion 23 a and the inner member 3 is achieved. Can improve the water-stopping property.

  Moreover, since the 2nd press-contact part 24a is formed in the water supply shaft insertion side rather than the inner member 3 of the state hold | maintained at the opening end by the side of a liquid container, the water stop of the water supply shaft 11 by the 2nd press-contact part 24a The holding function can be exhibited reliably.

  Further, since the second pressure contact portion 24a is formed to protrude in a radial shape at the opening end on the liquid container side, the water tightness between the second pressure contact portion 24a and the water supply shaft 11 is improved. The water-stopping property can be further improved.

  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.

  That is, in the bottle cap 1 of the above-described embodiment, the configuration in which the first pressure contact portion 23a is formed along the circumferential direction as a smooth surface facing the shaft hole 21a in the bearing portion 21 has been described. The shape of the one pressure contact portion 23a is not limited to this, and may be formed as, for example, a rib-like protrusion that protrudes in the radial direction, like the second pressure contact portion 24a.

  Moreover, although the outer cylinder part 23 and the inner cylinder part 24 were provided in the bearing part 21 in the Example mentioned above, and the structure formed in a double cylinder shape was demonstrated, as a structure of this bearing part 21, at least, A first pressure contact portion 23a formed at the opening end on the liquid container side in the shaft hole 21a of the bearing portion 21 and in pressure contact with the inner member 3, a diameter closer to the water supply shaft insertion side than the first pressure contact portion 23a. Any structure may be used as long as it has a second pressure contact portion 24a that is formed on the inner side in the direction and is in pressure contact with the water supply shaft 11. For example, the bearing portion 21 is formed in a single cylindrical shape, and the first pressure contact portion 23a and The second pressure contact portions 24a may be formed at the corresponding positions.

DESCRIPTION OF SYMBOLS 1 Bottle cap 2 Main body member 3 Inner member 10 Cylindrical mouth part 11 Water supply shaft 12 Protrusion part 20 Top surface 21 Bearing part 22 Outer edge part 22a Mounting recessed part 23 Outer cylinder part 23a First press-contact part 23b Stopper 24 Inner cylinder part 24a 1st Second pressure contact portion 25 Peripheral wall portion 26 Peripheral flange 26a Water stop rib 30 Main body portion 30a Outer peripheral wall 31 Outer protrusion 32 Closing rod 33 Water stop rib

Claims (5)

A main body member formed with a cylindrical bearing portion into which a water supply shaft of the water server is inserted is used at the center portion, and is mounted on the cylindrical mouth portion of the liquid container for the water server, and on the liquid container side of the bearing portion. In a bottle cap having a bottomed cylindrical inner member that is removably held at the opening end,
The body member is
In the shaft hole of the bearing part,
A first pressure contact portion formed at the opening end on the liquid container side and in pressure contact with the inner member;
A second pressure contact portion that is formed on the water supply shaft insertion side and radially inward from the first pressure contact portion, and is in pressure contact with the water supply shaft;
A bottle cap characterized by comprising:   The bearing portion includes an outer cylinder portion on which the first pressure contact portion is formed on an inner peripheral surface, and a second pressure contact portion disposed on the inner peripheral surface at a radially inner position of the outer cylinder portion. The bottle cap according to claim 1, wherein an inner cylinder portion is provided.   3. The bottle cap according to claim 1, wherein the first press-contact portion is press-contacted to a water stop rib extending along a circumferential direction on an outer peripheral surface of the inner member.   The bottle cap according to any one of claims 1 to 3, wherein the second press-contact portion is formed on the water supply shaft insertion side with respect to the inner member held in the opening end on the liquid container side. .   The bottle cap according to any one of claims 1 to 4, wherein the second press-contact portion is formed to project in a rib shape in a radial direction at an opening end on a liquid container side.

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