JP2019073340A - Bottle cap - Google Patents

Abstract

To provide a bottle cap in which the retention of the inner member in the bearing part and a cut-off performance with the water supply shaft are improved.SOLUTION: In a bottle cap 1 including a body member 2 in which a cylindrical bearing part 21 is formed which is mounted on and used at a cylindrical opening 10 of a water server liquid container and into which a water supply shaft 11 of a water server is inserted at a central part and an inner member 3 which is detachably held by an opening end on a liquid container side of the bearing part 21, an engaging part 21b which is provided on the same inner peripheral surface of the bearing part 21 so as to be able to engage with the inner member 3 and a pressure contact part 21c which protrudes toward a center direction from the engaging part 21b and which is provided so as to be pressure contactable with the water supply shaft 11 inserted from the opening end on the liquid container side are formed respectively.SELECTED DRAWING: Figure 5

Description

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

  In recent years, there has been proposed a water server which connects a liquid container filled with liquid such as drinking water and takes out the drinking water in the liquid container from the spout and provides it. Normally, a liquid container connected to this type of water server is used with a bottle cap attached to the cylindrical opening, and when the liquid container is connected to the water server, the water supply shaft of the water server is used. 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 Document 1, a main body member in which a cylindrical bearing portion in which a water supply shaft of a water server is inserted is formed at a central portion, and a liquid container side of the bearing portion The outer edge of the main body member is elastically deformed in accordance with the shape of the cylindrical opening in a state where the bearing is projected into the cylindrical opening. It is fixed to the outer peripheral side of the cylindrical opening. And when a liquid container is connected with a water server, the front-end | tip part of a water supply shaft is first inserted in an inner member, and a water supply shaft is then inserted in a liquid container via a bearing part. On the other hand, when the liquid container is removed from the water server, the inner member is fitted again to the opening end on the liquid container side of the bearing portion and returned to the original state.

JP 2005-335713 A

  By the way, in the above-mentioned conventional bottle cap, as a configuration of the bearing portion, an engagement protrusion is provided on the inner peripheral surface on the liquid container side, and the inner diameter of the opening end on the liquid container side becomes smaller than the outer diameter of the water supply shaft It is formed as. By thus forming the engaging projection on the inner peripheral surface of the bearing portion, the engaging projection is pressed against the inner member inserted into the opening end on the liquid container side of the bearing portion, and the inner member is kept watertight Not only the function to do, but also when the liquid container is connected to the water server, the engaging projection is pressure-welded by the water supply shaft inserted into the bearing portion, and it also has a function to hold the water supply shaft shut off.

  However, as described above, in the configuration in which the water supply shaft is held together with the inner member by the engagement projection of the bearing portion, for example, after the liquid container is removed from the water server, the open end of the bearing portion on the liquid container side expands If it does not return to the original shape (inside diameter) while being elastically deformed in the radial direction, the fitting state of the inner member becomes insufficient, and the inner member falls into the liquid container by its own weight, or inside the liquid container The potable water may leak out of the machine, and when connecting the liquid container to the water server again, the inner member can not be pushed out and fitted at the tip of the water supply shaft In some cases, there is a problem that the holding performance of the inner member in the bearing portion and the water resistance with the water supply shaft are inferior.

  So, in this invention, it solves the said conventional subject regarding a bottle cap, and it aims at providing the bottle cap which improved the retention property of the inner member in a bearing part, and water repellency with a water supply shaft.

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

  That is, according to the first aspect of the invention, the main body member is mounted on the cylindrical opening of the liquid container for water server and used, and the cylindrical bearing in which the water supply shaft of the water server is inserted is formed at the center. A bottle cap having an inner member which is detachably held at an opening end on the liquid container side of the bearing portion, wherein the same inner peripheral surface of the bearing portion protrudes so as to be engageable with the inner member An engaging portion to be formed, and a pressing portion protruding toward the center direction from the engaging portion and protruding so as to be in pressure contact with the water supply shaft inserted into the bearing portion are respectively formed. is there.

  According to a second aspect of the present invention, the press-contacting portion is provided with a rib-like press-contacting projection which obliquely protrudes in the insertion direction of the water supply shaft.

  According to the third aspect of the present invention, the pressure contact portion is disposed closer to the water supply shaft insertion side than the engagement portion.

  In the fourth aspect, the engaging portion is formed so as not to interfere with the water supply shaft when the liquid container is connected to the water server.

  In the fifth aspect, the engagement portion is engageable with an engagement rib formed on an outer peripheral surface of the inner member.

  According to the sixth aspect of the present invention, the engaging portion is disposed on the water supply shaft insertion side with respect to the water blocking rib of the inner member held in the open end on the liquid container side.

  As an effect of the present invention, it is possible to improve the retention of the inner member in the bearing portion and the water resistance with the water supply shaft.

It is the perspective view which showed the whole structure of the bottle cap of 1st Example. It is a perspective sectional view of the bottle cap of FIG. It is sectional drawing of the bottle cap of FIG. It is sectional drawing which showed the state in which the bottle cap was mounted | worn with the cylindrical opening part. It is sectional drawing which showed the state to which the liquid container was connected with the water server. FIG. 6 is a partial enlarged cross-sectional view of FIG. 5; It is the perspective view which showed the whole structure of the bottle cap of 2nd Example. It is sectional drawing of the bottle cap of FIG. It is sectional drawing which showed the state in which the bottle cap was mounted | worn with the cylindrical opening part. It is a sectional view showing a state where a bottle cap including a cover member was attached to a cylindrical mouth. It is the perspective view which showed the whole structure of the bottle cap of 3rd Example. Figure 12 is a perspective sectional view of the bottle cap of Figure 11; It is sectional drawing of the bottle cap of FIG. It is a perspective view of an inner member. It is sectional drawing which showed the state in which the bottle cap was mounted | worn with the cylindrical opening part. It is sectional drawing which showed the state to which the liquid container was connected with the water server. It is the perspective view which showed the whole structure of the bottle cap of 4th Example. Fig. 18 is a perspective sectional view of the bottle cap of Fig. 17; FIG. 18 is a cross-sectional view of the bottle cap of FIG. 17; It is a perspective view of a shape maintenance member. It is sectional drawing which showed the state in which the bottle cap was mounted | worn with the cylindrical opening part. It is the perspective view which showed the whole structure of the bottle cap of 5th Example. FIG. 23 is a perspective cross-sectional view of the bottle cap of FIG. 22. FIG. 23 is a cross-sectional view of the bottle cap of FIG. 22. It is sectional drawing which showed the state in which the bottle cap was mounted | worn with the cylindrical opening part. It is sectional drawing which showed the state to which the liquid container was connected with the water server. It is the perspective view which showed the whole structure of the bottle cap of 6th Example. It is a perspective cross-sectional view of the bottle cap of FIG. It is sectional drawing of the bottle cap of FIG. It is sectional drawing which showed the state in which the bottle cap was mounted | worn with the cylindrical opening part. It is the perspective view which showed the whole structure of the bottle cap of 7th Example. Fig. 32 is a perspective sectional view of the bottle cap of Fig. 31; It is sectional drawing of the bottle cap of FIG. It is sectional drawing which showed the state in which the bottle cap was mounted | worn with the cylindrical opening part.

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

  As shown in FIGS. 1 to 4, the bottle cap 1 of the present embodiment is a cap member detachably mounted on the cylindrical opening 10 of the liquid container for water server, and more specifically, a central portion And the inner member 3 etc. which is detachably held at the opening end on the liquid container side of the bearing portion 21 in which the cylindrical bearing portion 21 into which the water supply shaft 11 of the water server is inserted is formed. It is configured.

  The cylindrical opening 10 is projected 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 cylindrical opening 10 In the condition, the liquid container is connected to the water server. The open end of the cylindrical opening 10 is chamfered in a gentle R shape, and a projection 12 is formed so as to protrude radially from the outer peripheral side, and the bottle cap 1 can be easily attached to the cylindrical opening 10 Is configured as. 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 to the cylindrical opening 10.

  The main body member 2 has a top surface 20 forming a top surface, a cylindrical bearing 21 formed at the center on the top surface side, an outer edge 22 formed on the periphery of the top surface 20, and a top surface 20 Further, the peripheral flange portion 23 erected along the vertical direction (the arrow X direction in FIG. 3) of the bottle cap 1 and the peripheral wall portion 24 etc. continuous between the bearing portion 21 and the peripheral flange portion 23 are integrated. It is formed and configured. A label member (not shown) for closing the opening of the bearing 21 is attached to the top surface of the body member 2 and used.

  The bearing portion 21 has an axial hole 21a in which the water supply shaft 11 is inserted in a cylindrical shape, and a top surface side (hereinafter, referred to as "water supply shaft insertion side") and the opposite side (hereinafter, "liquid container side" ) Is open. An inner member 3 described later is held in a watertight state so as to be able to be fitted and detached at the opening end (lower side in FIG. 3) of the bearing 21 on the liquid container side, and the shaft hole 21a is closed by the inner member 3. The water supply shaft 11 is inserted into the shaft hole 21a from the opening end (upper side in FIG. 3) of the bearing 21 on the water supply shaft insertion side (the upper side in FIG. 3), and the tip projects from the opening end on the liquid container side (see FIG. 5 etc.) ).

  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 (including the water blocking rib 33), and the inner peripheral surface is the water blocking rib of the inner member 3 The inner member 3 is held in a waterproof state by fitting in a water-tight state with 33). Further, the opening end of the bearing portion 21 on the liquid container side is formed so that the inner peripheral edge portion is chamfered to facilitate the insertion and removal of the inner member 3. On the other hand, the inner peripheral edge portion of the opening end of the bearing portion 21 on the water supply shaft insertion side is tapered in cross section, and the water supply shaft 11 contacts with the inner peripheral surface (pressure contact portion 21c described later) It is formed to be connected.

  At the same inner peripheral surface of the bearing portion 21, an engaging portion 21b which is provided so as to be engageable with the inner member 3 and a central portion of the engaging portion 21b are protruded (bulged) to insert the water supply shaft A water supply shaft 11 inserted into the bearing portion 21 from a side open end and a press-contact portion 21c which is provided so as to be press-contactable are formed.

  The engaging portion 21 b is formed along the circumferential direction as a protrusion having a tapered cross section so as to gradually decrease in diameter from the opening end on the liquid container side toward the inner direction of the bearing 21, and is inserted into the bearing portion 21. It is formed to be engageable with (the outer protrusion 31 of) the inner member 3. The engaging portion 21 b is disposed between the outer protrusion 31 of the inner member 3 and the water blocking rib 33 in a state where the inner member 3 is held at the opening end on the liquid container side. In particular, the engaging portion 21b is disposed closer to the water supply shaft insertion side than the water blocking rib 33 of the inner member 3 in a state of being held at the open end on the liquid container side. It arrange | positions in the position which adjoined with the lower end surface of the outer side protrusion 31 so that it might space apart (refer FIG.3 and FIG.6).

  The pressure contact portion 21 c is disposed on the water supply shaft insertion side relative to the engagement portion 21 b, and is formed along the circumferential direction as a protrusion that bulges in the central direction from the inner peripheral surface of the bearing portion 21. A rib-like pressure contact projection 21d is provided which protrudes obliquely in the insertion direction of the water supply shaft 11 (downward direction in FIG. 3). By thus providing the pressure contact portion 21c, the pressure contact portion 21c is pressed against the outer peripheral surface of the water supply shaft 11 in a watertight state, and the pressure contact protrusion 21d is elastically deformed by the water supply shaft 11 to stop the water supply shaft 11 It is held.

  The outer edge portion 22 is formed continuously with the peripheral edge of the top surface portion 20 and is thinly formed in a cylindrical shape with a circular cross section, and the mounting recess 22a in which the projection 12 of the cylindrical opening portion 10 is fitted on the inner circumferential surface In the state where the bottle cap 1 is attached to the cylindrical opening 10 (see FIG. 4 etc.), it is elastically deformed according to the shape of the cylindrical opening 10 and is in close contact with the outer peripheral surface. .

  The peripheral ridge portion 23 is continuous with the other peripheral edge of the top surface portion 20 and is erected in a cylindrical shape having a circular cross section concentric with the outer edge portion 22, and a water blocking rib 23 a is formed along the circumferential direction on the outer peripheral surface It is done. By forming the outer edge portion 22 and the peripheral edge collar portion 23 in this manner, the open end (protrusion of the cylindrical mouth portion 10 in a state where the bottle cap 1 is attached to the cylindrical mouth portion 10 (see FIG. 4 etc.) The portion 12) is inserted into the space between the inner peripheral surface of the outer edge portion 22 and the outer peripheral surface of the peripheral ridge portion 23, and is fitted in the mounting recess 22a. At that time, the outer edge 22 is elastically deformed in accordance with the shape of (the protruding portion 12) of the opening end of the cylindrical opening 10, and the water blocking rib 23a of the peripheral ridge 23 is the inner periphery of the cylindrical opening 10. By pressing against the surface, the cylindrical opening 10 is pressed by the inner peripheral surface of the outer edge 22 and the outer peripheral surface of the peripheral ridge 23, and the main body member 2 is attached to the cylindrical opening 10 in a watertight state Ru.

  The peripheral wall portion 24 is formed continuously from the outer peripheral surface of the bearing portion 21 to the peripheral flange portion 23 and extends in parallel along the circumferential direction from the outer peripheral surface in the vicinity of the opening end on the liquid container side of the bearing portion 21 After that, it is extended obliquely upward so as to gradually expand in diameter toward the peripheral ridge portion 23. A cylindrical reinforcing wall 25 having a circular cross-section with the same center as the peripheral flange 23 is erected on the side of the peripheral wall 24 on the water supply shaft insertion side, and in the same manner in the radial direction on the side of the water supply shaft insertion The bearing portion 21 and the reinforcing wall portion 25 are continuous with each other via a plurality of reinforcing ribs 26, 26.

  The reinforcing wall portion 25 is disposed to be separated from the peripheral edge flange portion 23, and the reinforcing wall portion 25 is provided at a distance between the bearing portion 21 and the peripheral edge flange portion 23, whereby the top surface of the main body member 2 is provided. In the plan view, a concave groove 25a having a circular cross section is formed. As described above, the reinforcing wall 25 is provided between the bearing 21 and the peripheral ridge 23 to form the recessed groove 25 a, whereby the opening of the cylindrical opening 10 in the state where the bottle cap 1 is attached to the liquid container. Even when the peripheral flange portion 23 is pressed toward the center direction at the end (protrusion portion 12) and elastically deformed, the concave groove 25a acts as a buffer groove to prevent the deformation of the bearing portion 21 (shaft hole 21a) Thus, it is possible to prevent the drinking water in the liquid container from leaking out of the machine through the axial hole 21a.

  The inner member 3 is detachably held in a watertight state so as to close the opening end on the liquid container side of the bearing portion 21. Specifically, the inner member 3 is formed of a bottomed cylindrical main body portion 30, The outer protrusion 31 is formed on the outer peripheral surface of the open end side (upper side in FIG. 3) of the second embodiment, and the closing rod 32 is circumferentially extended on the outer peripheral surface of the closed end side (lower side in FIG. The water blocking rib 33 extends in the circumferential direction at a position near the closing rod 32.

  The main body portion 30 is opened toward the inner direction of the bearing portion 21, and the open end is bent radially inward and formed to be engageable with the concave portion formed at the tip of the water supply shaft 11 . In a state where the inner member 3 is held by the opening end on the liquid container side of the bearing portion 21, the water supply shaft 11 inserted into the bearing portion 21 is inserted into the opening end, and the opening end and the concave portion are engaged. Thus, it is integrated with the water supply shaft 11 (see FIG. 5).

  The outer protrusion 31 is circumferentially protruded from the outer peripheral surface of the main body 30, and is formed engageable with the engaging portion 21b formed on the bearing 21, and is engaged with the engaging portion 21b. Thus, the inner member 3 is engaged with the bearing portion 21 so as to be prevented from dropping out of the bearing portion 21. The outer protrusion 31 is formed in a tapered shape in cross section so that the tip gradually expands 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 resistance at the time of engagement with the portion 21 b is reduced, and the inner member 3 can be easily fitted to the opening end on the liquid container side of the bearing portion 21.

  The closing rod 32 is in contact with the open end of the bearing 21 in a state where the inner member 3 is fitted to the open end of the bearing 21. Further, the water blocking rib 33 protrudes from the outer peripheral surface of the main body 30 along the circumferential direction, and as described above, the bearing in the state where the inner member 3 is held at the opening end of the bearing 21 on the liquid container side. The inner peripheral surface of the portion 21 is press-contacted.

  As shown in FIGS. 4 to 6, when the liquid container is connected to the water server, the liquid in which the bottle cap 1 is attached in advance to the open end (projection 12) of the cylindrical opening 10 from above the water server The container is moved downward, and the water supply shaft 11 is inserted into the bearing portion 21 from the shaft hole 21 a exposed to the top surface of the main body member 2. The water supply shaft 11 inserted into the bearing portion 21 is in pressure contact with the pressure contact portion 21c in the shaft hole 21a, and is inserted in a state where the outer peripheral surface is crimped in a watertight state while elastically deforming the pressure contact protrusion 21d in the diameter expansion direction. Go. Then, when the tip end of the water supply shaft 11 abuts on the inner member 3 fitted to the opening end of the bearing portion 21, the tip end of the water supply shaft 11 contacts the opening end of the inner member 3 with the downward movement of the liquid container. The water supply shaft 11 and the inner member 3 are integrally fitted, and eventually, the tip of the water supply shaft 11 protrudes from the opening end of the bearing 21 on the liquid container side.

  When the liquid container is removed from the water server, the water container shaft 11 and the inner member 3 are integrally moved by the upward movement of the liquid container contrary to the case where the liquid container is connected, and eventually the bearing portion 21 The inner member 3 is fitted to the open end on the liquid container side of the Then, after the closing rod 32 is in contact with the opening end of the bearing portion 21 and the inner member 3 is completely fitted, 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 Be

  In the bottle cap 1 of the present embodiment, in the state where the liquid container is connected to the water server, the pressure contact portion 21c is protruded toward the center direction from the engagement portion 21b, whereby the engagement portion 21b is the water supply shaft 11 Are arranged so that they do not abut and interfere with each other (see FIG. 6). Thus, by forming the engaging portion 21b so as not to interfere with the water supply shaft 11, even if the liquid container is attached to the water server for a long time, the bearing portion due to the deformation of the engaging portion 21b It is possible to prevent the inner member 3 from falling off after the liquid container is removed by preventing the expansion of the inner diameter of 21.

  As described above, the bottle cap 1 of the present embodiment is mounted on the cylindrical opening 10 of the liquid container for water server and used, and the cylindrical bearing in which the water supply shaft 11 of the water server is inserted in the center The same inner peripheral surface of the bearing 21 in the bottle cap 1 having the main body member 2 in which 21 is formed and the inner member 3 held so as to be able to be attached and detached at the opening end on the liquid container side of the bearing 21. And an engaging portion 21b protrudingly engageable with the inner member 3, and protruding toward the center direction from the engaging portion 21b and protrudingly engagable with the water supply shaft 11 inserted in the bearing portion 21. Since the press-contacting portions 21c to be formed are respectively formed, it is possible to improve the retention of the inner member 3 in the bearing portion 21 and the water resistance with the water supply shaft 11.

  That is, since the engaging portion 21b in which the inner member 3 is engaged and the press-contacting portion 21c in pressure-contact with the water supply shaft 11 are separately provided on the inner peripheral surface of the bearing portion 21, It is possible to separate the inner member 3 so as to keep the water shut and separate the water supply shaft 11 so as to hold the water supply shaft 11 in the pressure contact portion 21c so as to exhibit the water stop function. After removing the liquid container from the water server, The opening end of the bearing 21 on the liquid container side is prevented from being deformed in the diameter expansion direction, 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 When the liquid container is connected again to the water server, the inner member 3 can be reliably fitted without being pushed out at the tip of the water supply shaft 11.

  In particular, in the bottle cap 1 of the present embodiment, a rib-like pressing projection 21d is provided in which the pressing part 21c protrudes obliquely in the insertion direction of the water supply shaft 11, so that the pressure contact projection 21d Water tightness can be enhanced to further improve water barrier properties.

  Moreover, since the press-contact part 21c is arrange | positioned rather than the engaging part 21b at the water supply shaft insertion side, the water stop holding function of the water supply shaft 11 by the press-contact part 21c can be exhibited reliably.

  Further, the engaging portion 21 b is engageable with the engaging rib 31 formed on the outer peripheral surface of the inner member 3, and the water blocking rib 33 of the inner member 3 in the state of being held at the opening end on the liquid container side Because the water supply shaft insertion side is also disposed on the water supply shaft insertion side, it is possible to prevent deformation of the engagement portion 21b in the diameter-expanding direction, and to reliably exhibit water blocking property by the water blocking rib 33.

  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.

  The bottle cap 101 according to another embodiment shown in FIGS. 7 to 10 differs from the bottle cap 1 according to the above-described embodiment in that the main body member 102 is integrally assembled in the internal space of the cylindrical cover member 104. It is configured as a covered bottle cap (see FIG. 10). As described above, by forming the main body member 102 as a cover-equipped bottle cap integrally assembled in the internal space of the hollow cylindrical cover member 104, the cover in a state of being attached to the cylindrical opening 10 of the liquid container Since the main body member 102 is not exposed by the member 104, hygiene control and quality maintenance are easy when transporting and storing the liquid container, and the quality alteration of the contents in the liquid container is prevented to prevent unopened (virgin property) Can be improved.

  The main body member 102 of this embodiment includes a top surface portion 120 forming a top surface, a cylindrical bearing portion 121 formed at the center portion on the top surface side, and an outer edge portion 122 formed at the periphery of the top surface portion 120. A peripheral edge collar portion 123 erected along the insertion direction of the water supply shaft 11 from the top surface portion 120 and a peripheral wall portion 124 and the like formed between the bearing portion 121 and the peripheral edge collar portion 123 are integrally formed. .

  The main body member 102 protrudes toward the center direction from the engaging portion 121 b which is provided on the same inner circumferential surface of the bearing portion 121 so as to be engageable with the inner member 103 and the engaging portion 121 b. The inserted water supply shaft 11 and the press-contacting part 121c provided so as to be press-contactably projectable are respectively formed, and the retention property of the inner member 103 in the bearing part 121 and the water resistance with the water supply shaft 11 can be improved. Is configured as. Further, the reinforcing wall portion 125 is provided between the bearing portion 121 and the peripheral edge collar portion 123 to form the recessed groove 125a, whereby the open end of the cylindrical opening 10 in a state where the bottle cap 101 is attached to the liquid container. Even if the peripheral ridge portion 123 is pressed toward the center direction by the (protrusion portion 12) and elastically deformed, the concave groove 125a acts as a buffer groove to prevent the deformation of the bearing portion 121 (shaft hole 121a). It is configured to prevent the drinking water in the liquid container from leaking out of the machine through the axial hole 121a.

  The configuration of the other main body member 102 and the like is substantially the same as that of the main body member 2 in the above-described embodiment (see FIG. 3 and the like), and thus detailed description of the members having substantially the same shape is omitted.

  As shown in FIG. 10, the cover member 104 is formed into a hollow cylindrical shape, and is thinly formed into a cylindrical shape having a circular cross section so as to be continuous with the top surface portion 140 formed substantially in a plane and the periphery of the top surface portion 140. The skirt portion 141 is integrally formed. In the inner circumferential surface of the skirt portion 141, a locking recess 141a is formed along the circumferential direction in which (the outer edge portion 122 of) the main body member 102 is fitted at a corner portion which is a continuous portion with the top surface portion 140 There is. In the bottle cap 101 of this embodiment, the main body member 102 is inserted into the internal space from the lower open end of the skirt portion 141 of the cover member 104, and the outer edge 122 of the main body member 102 fits in the locking recess 141a of the skirt member 104. By being joined, the main body member 102 is assembled to the cover member 104 integrally.

  When the main body member 102 and the cover member 104 are integrally assembled, the top surface portion 120 and the outer edge portion 122 of the main body member 102 are surrounded by the cover member 104, and the shaft hole 121a is opened to the top surface by the top surface portion 140. Is closed and the outer edge 122 is completely covered with the skirt portion 141. Then, when the liquid container is connected to the water server, the cover member 104 is peeled off from the cylindrical opening 10 so that the main body member 2 is exposed (see FIG. 9 etc.). Is moved down.

  In addition, as a structure of the bottle cap 101, it is not limited to the Example mentioned above, A various change is possible unless it deviates from the objective of this invention.

  Unlike the bottle cap 1 · 101 of the above-described embodiment, the bottle cap 201 of another embodiment shown in FIGS. 11 to 16 is configured such that the inner member 203 can be engaged with the outer peripheral surface of the bearing portion 221. ing. By thus attaching the inner member 203 to the bearing portion 221, the retention of the inner member 203 in the bearing portion 221 is improved, and when the liquid container is removed from the water server, the inner member 203 is the liquid container by its own weight. It can be reliably prevented from falling into the inside.

  That is, in the conventional bottle cap, when the inner member is detachably held by the opening end of the bearing on the liquid container side and the liquid container is connected to the water server, the tip of the water supply shaft is attached to the inner member When being inserted and when the liquid container is removed from the water server, the inner member is again fitted to the opening end on the liquid container side of the bearing portion and is returned to the original state. Therefore, after the liquid container is removed from the water server, if the opening end on the liquid container side of the bearing does not return to the original shape (inner diameter) while being elastically deformed in the diameter expansion direction, the fitting state of the inner member is Not enough, the inner member falls into the liquid container by its own weight, and drinking water remaining in the liquid container at the time of recovery of the liquid container leaks out of the machine, and the liquid container There is a problem that it takes time for the work of collecting the inner member and the work of discharging the foreign matter that has entered the liquid container when using it. So, in a present Example, it is a thing about the bottle cap which solves the said conventional subject, and provides the bottle cap which improved the retention property of the inner member in a bearing part.

  The bottle cap 201 of the present embodiment is attached to and used at the cylindrical opening 10 of the liquid container for water server, and a cylindrical bearing 221 in which the water supply shaft 11 of the water server is inserted is formed at the center. In the bottle cap 201 having the main body member 202 and the inner member 203 held at the liquid container side opening end of the bearing portion 221, the inner member 203 closes the liquid container side opening end of the bearing portion 221 A bottomed cylindrical main body portion 230 and an engaging portion 231 and the like engaged with the outer peripheral surface of the bearing portion 221 so as to be movable along the axial direction are formed.

  The main body member 202 includes a top surface portion 220 forming a top surface, a cylindrical bearing portion 221 formed at the center portion on the top surface side, an outer edge portion 222 formed at the periphery of the top surface portion 220, and a top surface portion 220. Further, the peripheral flange portion 223 and the like erected along the insertion direction of the water supply shaft 11 are integrally formed. Further, the reinforcing wall portion 225 is provided between the bearing portion 221 and the peripheral edge collar portion 223 to form the recessed groove 225a, whereby the open end of the cylindrical opening 10 in a state where the bottle cap 201 is attached to the liquid container. Even when the peripheral flange portion 223 is pressed toward the center direction by the (protrusion portion 12) and elastically deformed, the concave groove 225a acts as a buffer groove to prevent the deformation of the bearing portion 221 (shaft hole 221a). It is configured to prevent the drinking water in the liquid container from leaking out of the machine through the axial hole 221a.

  The main body member 202 is an outer peripheral surface of the bearing portion 221, and an engagement protrusion 221b which is engaged with (an engagement protrusion 231a and an opening edge 231c thereof) described later protrudes on an opening edge portion on the liquid container side. It is set up. The engagement protrusion 221 b is formed along the circumferential direction as a protrusion having a tapered cross section so as to gradually increase in diameter in the direction from the open end on the liquid container side to the other end.

  About the structure of other main body members 202 grade | etc., The detailed description of the member of the shape substantially the same as the main body member 2 of the Example (refer FIG. 3 grade | etc.,) Mentioned above is abbreviate | omitted.

  As described above, the inner member 203 is formed with the bottomed cylindrical main body portion 230 and the engaging portion 231 engaged with the bearing portion 221 (see FIG. 14). The main body portion 230 is a concave portion which is opened toward the inner direction of the bearing portion 221 in a state of being attached to the main body member 202 and whose open end is bent radially inward to be formed at the tip of the water supply shaft 11 And is formed to be engageable. The inner member 203 is integrated with the water supply shaft 11 by inserting the water supply shaft 11 inserted into the bearing portion 221 into the opening end and engaging the opening end with the concave portion (see FIG. 16). Further, in the main body portion 230, the closing rod 232 is extended along the circumferential direction on the outer peripheral surface on the opening end side, and the closing rod 232 abuts on the opening edge portion of the bearing portion 221. The open end is closed.

  The engaging portion 231 is formed in a cylindrical shape having a circular cross section and connected to (the closing rod 232 of) the main body portion 230, and an engaging protrusion 231a is provided on the inner peripheral surface so as to protrude therefrom. The engagement protrusion 231a is formed along the circumferential direction as a protrusion having a tapered cross-sectional shape so as to gradually reduce the diameter from the fixed side to the main body portion 230 in the other end direction. The resistance at the time of engagement with the engagement protrusion 221 b of the main body member 202 is reduced, and the inner member 3 can be easily held at the opening end on the liquid container side of the bearing 221. In the engaging portion 231, the inflow hole 231b of the drinking water in the liquid container is opened in the peripheral wall, and the opening edge portion 231c is formed on the opposite side to the fixed side with the main body portion 230.

  In the bottle cap 201 of this embodiment, the inner member 203 is movably engaged along the axial direction and attached to the outer peripheral surface of the bearing portion 221 in a state where the bottle cap 201 is attached to the liquid container. . Normally, the bearing protrusion 221b of the bearing portion 221 and the engagement protrusion 231a of the inner member 203 are engaged in a watertight state, and the opening edge portion of the bearing portion 221 is in contact with the closing rod 232. The opening end 221 is closed by the inner member 203 in a watertight state. In this state, the inner member 203 moves along the axial center direction of the bearing portion 221 even if the engagement between the engagement protrusion 221b of the bearing portion 221 and the engagement protrusion 231a of the inner member 203 is insufficient. When the engaging projection 221b of the bearing 221 and the opening edge 231c of the inner member 203 are engaged, the bearing 221 is prevented from holding the inner member 203 and falling into the liquid container. There is.

  As shown in FIG. 15 to FIG. 16, when the liquid container is connected to the water server, the liquid in which the bottle cap 201 is attached in advance to the opening end (protrusion 12) of the cylindrical opening 10 from above the water server The container is moved downward, and the water supply shaft 11 is inserted into the bearing portion 221 from the shaft hole 221 a exposed to the top surface of the main body member 202. When the tip of the water supply shaft 11 inserted into the bearing 221 abuts against the inner member 203 disposed at the opening end of the bearing 221, the tip of the water supply shaft 11 is moved inward with the downward movement of the liquid container. The water supply shaft 11 and the inner member 203 are integrated with each other by being inserted into the opening end of the main body portion 230 of the member 203. When the liquid container is further moved downward in this state, the engaging projection 231a of the inner member 203 is eventually detached from the engaging projection 221b of the bearing portion 221, and the inner member 203 is along the axial center direction of the bearing portion 221. The tip end of the water supply shaft 11 protrudes from the open end of the bearing portion 221 on the liquid container side while moving.

  When the liquid container is removed from the water server, the water container 11 and the inner member 203 are moved integrally by moving the liquid container up as opposed to the case where the liquid container is connected. The engagement protrusion 221b is engaged with the engagement protrusion 231a of the inner member 203, and the closing rod 232 of the inner member 203 abuts on the opening end of the bearing portion 221 on the liquid container side. The shaft 11 is detached, and the water supply shaft 11 is pulled out from the bearing portion 221.

  In addition, as a structure of the bottle cap 201, it is not limited to the Example mentioned above, A various change is possible unless it deviates from the objective of this invention.

  The bottle cap 301 of another embodiment shown in FIGS. 17 to 21 is different from the bottle caps 1. 101. 201 of the above-described embodiments, and provided with a shape holding member 304 for holding the shape of the outer edge portion 322. There is. Thus, by providing the shape holding member 304 for holding the shape of the outer edge portion 322, it is possible to prevent the shape change of the outer edge portion 322 of the bottle cap 301, and clogging or parting failure in parts feeder in the manufacturing process. Can be prevented.

  That is, in the conventional bottle cap, the top surface portion forming the top surface in the body member, the cylindrical bearing portion formed in the center portion on the top surface side, the outer edge portion formed on the periphery of the top surface portion, etc. In the state where the bottle cap is attached to the cylindrical opening of the liquid container, the outer edge is elastically deformed and brought into close contact with the shape of the outer peripheral surface of the cylindrical opening. . However, in the configuration of the conventional bottle cap, since the outer edge described above is thinly formed in a cylindrical shape with a circular cross section, the outer edge is deformed due to self weight or overlapping with other bottle caps, etc. When transporting by the feeder, it may not be possible to align in a predetermined direction, which may cause clogging or poor plugging during transport. So, in a present Example, it is a bottle cap which solves the said conventional subject, and prevents the shape change of an outer edge part, and provides the bottle cap which improved productivity.

  The bottle cap 301 of this embodiment is a cap member detachably mounted on the cylindrical opening 10 of the water server liquid container, and is a cylindrical bearing in which the water supply shaft 11 of the water server is inserted in the center The body member 302 in which the portion 321 is formed, the inner member 303 held so as to be able to be attached and detached at the liquid container side open end of the bearing portion 321, and a circle mounted on the bearing portion 321 A plurality of elastic pieces 341, 341,... Which are in contact with the inner circumferential surface of the outer edge portion 322 along the circumferential direction are configured with a shape holding member 304 and the like.

  Body member 302 includes a top surface portion 320 forming a top surface, a cylindrical bearing portion 321 into which the water supply shaft 11 of the water server is inserted at the center portion of top surface portion 320, and a cylindrical portion formed around the top surface portion 320 An outer edge 322 and the like that are in contact with the outer peripheral surface of the mouth are integrally formed. In the bottle cap 301 of this embodiment, the packing member 305 is separately disposed on the back surface side of the top surface portion 320 of the main body member 302, and the packing member 305 is attached to the liquid container. Is in pressure contact with the projection 12 of the cylindrical opening 10 so that the drinking water in the liquid container does not leak out of the machine.

  The bearing portion 321 is formed with a shaft hole 321a in which the water supply shaft 11 is inserted in a cylindrical shape, and the inner peripheral surface of the opening end (lower side in FIG. 19) of the bearing portion 321 on the liquid container side An engaging portion 321 b which is provided so as to be engageable is formed so as to protrude, and the inner diameter of the open end on the liquid container side is formed smaller than the outer diameter of the water supply shaft 11. By thus forming the engaging portion 321b on the inner peripheral surface of the bearing portion 321, the inner member 303 (water stopping rib 333) inserted in the opening end on the liquid container side of the bearing portion 321 is watertight By fitting, the inner member 303 is kept water-stopped, and when the liquid container is connected to the water server, the water supply shaft 11 inserted in the bearing portion 321 is pressed against the water supply shaft 11 It is held.

  The outer edge portion 322 is continuous with the peripheral edge of the top surface portion 320 and thinly formed into a cylindrical shape with a circular cross section, and the mounting recess 322a in which the projection 12 of the cylindrical opening 10 is fitted on the inner circumferential surface A water blocking rib 322b is formed protruding along the inner circumferential surface of the mounting recess 322a and elastically deformed in contact with the protrusion 12. In a state where the bottle cap 301 is mounted on the liquid container (see FIG. 21 etc.), the mounting recess 322a is elastically deformed to be in close contact with the outer peripheral surface according to the shape of the cylindrical opening 10 and the water blocking rib 322b is It elastically deforms and adheres to the projection 12.

  The inner member 303 is detachably held in a watertight state so as to close the opening end of the bearing portion 321 on the liquid container side, and the outer protrusion 331 is provided on the outer peripheral surface of the open end side of the bottomed cylindrical main body portion 330. A closing rib 332 is extended along the circumferential direction on the outer peripheral surface of the closed end side of the main body 330, and a water blocking rib 333 is extended along the circumferential direction to a position near the closing ridge 332. There is.

  The outer protrusion 331 is circumferentially protruded from the outer peripheral surface of the main body 330, is formed engageable with the engaging portion 321b formed on the bearing portion 321, and is engaged with the engaging portion 321b. As a result, the inner member 303 is locked to the bearing portion 321, and the inner member 303 is configured to be prevented from dropping out of the bearing portion 321. The closing rod 332 is in contact with the open end of the bearing portion 321 in a state where the inner member 303 is fitted to the open end of the bearing portion 321. The water blocking rib 333 protrudes from the outer circumferential surface of the main body 330 along the circumferential direction, and the inner circumferential surface of the bearing 321 is held in a state where the inner member 303 is held at the opening end of the bearing 321 on the liquid container side. The pressure is applied to the formed engaging portion 321b.

  The shape holding member 304 is formed separately from the main body member 302, is attached to the bearing portion 321, and is formed so as to be able to abut on the inner circumferential surface of the outer edge portion 322. A plurality of (eight in this embodiment) elastic pieces extending in the mounting direction of the mounting portion 340 held on the outer peripheral surface and the water supply shaft 11 extending from the mounting portion 340 in the insertion direction (arrow X direction in FIG. 19) And the like (see FIG. 20).

  The mounting portion 340 is formed in a cylindrical shape having a circular cross section, and by being mounted on the outer peripheral surface of the bearing portion 321, the shape holding member 304 is held by the bearing portion 321. The elastic piece 341 is formed in a long plate shape bent in a substantially L-shaped cross section and extends in the insertion direction of the water supply shaft 11 so as to have a predetermined spacing along the circumferential direction of the mounting portion 321 It is deployed and arranged. The tip end portion 341a of the elastic piece 341 is extended in the radial direction centering on the bearing portion 321 in the state where the shape holding member 304 is attached to the bearing portion 321, and the outer edge portion 322 of the main body member 302 is a cross section An end surface is formed so as to be able to abut on the inner peripheral surface of the outer edge portion 322 so as to maintain a circular cylindrical shape.

  As shown in FIGS. 20 to 21, when the shape holding member 304 is attached to the bearing portion 321, the tip end portion 341 a of the elastic piece 341 is extended toward the inner peripheral surface of the outer edge portion 322, and the outer edge portion 322. To be placed in contact with or close to the By thus providing the shape holding member 304, creep deformation of the outer edge portion 322 is prevented, and the shape is held so that the outer edge portion 322 has a cylindrical shape with a circular cross section. In addition, when the bottle cap 301 is attached to the liquid container, the elastic piece 341 is elastically deformed by the projection 12 of the cylindrical opening 10 inserted into the outer edge 322 of the main body member 302, and the tip 341 a Is bent in the insertion direction of the cylindrical opening 10, and the distal end 341a abuts on the inner circumferential surface of the cylindrical opening 10 in a biased state. By forming the elastic piece 341 so as to be elastically deformed in this manner, the bottle cap 301 can be easily inserted into and removed from the liquid container while the shape holding member 304 is attached.

  In addition, as a structure of the bottle cap 301, it is not limited to the Example mentioned above, A various change is possible unless it deviates from the objective of this invention.

  The bottle cap 401 of another embodiment shown in FIGS. 22 to 26 differs from the bottle cap 1 of the embodiment described above in that the bearing portion 421 is extended to the liquid container side, and the bearing portion from the shaft hole 421a in the pressure contact portion 421c. The inner member 403 is formed so as to be fitted out of the opening end of the bearing portion 421 in a state where the liquid container is held in a vertical posture by guiding the water supply shaft 11 inserted into the inside 421. As described above, the pressure contact portion 421c is formed to have a guide function to hold the liquid container in the vertical posture, thereby supplying water when connecting the liquid container to the water server or when the liquid container is removed from the water server. By preventing the bearing portion 421 from being inserted in and out obliquely with respect to the shaft 11, it is possible to reliably prevent the inner member 403 from being dropped out from the bearing portion 421.

  The main body member 402 is projected toward the center direction from the engaging portion 421b which is provided on the same inner circumferential surface of the bearing portion 421 so as to be engageable with the inner member 403 and the engaging portion 421b. The inserted water supply shaft 11 and the press-contacting part 421c provided so as to be in a press-contact manner are formed, respectively, and the retention of the inner member 403 in the bearing part 421 and the water resistance with the water supply shaft 11 can be improved. Is configured as. Further, the reinforcing wall portion 425 is provided between the bearing portion 421 and the peripheral edge collar portion 423 to form the recessed groove 425a, whereby the open end of the cylindrical opening portion 10 with the bottle cap 401 attached to the liquid container. Even when the peripheral flange 423 is pressed in the central direction by the projection 12 and elastically deformed, the recessed groove 425a acts as a buffer groove to prevent the deformation of the bearing 421 (shaft hole 421a). It is configured to prevent the drinking water in the liquid container from leaking out of the machine through the axial hole 421a.

  The configuration of the other main body member 402 and the like is substantially the same as that of the main body member 2 in the above-described embodiment (see FIG. 3 and the like), and thus detailed description of the members having substantially the same shape is omitted.

  When the liquid container is connected to the water server, the liquid container in which the bottle cap 401 is attached in advance to the open end (protrusion 12) of the cylindrical opening 10 from the upper side of the water server is moved downward. The water supply shaft 11 is inserted into the bearing portion 421 from the shaft hole 421a exposed to the top surface of the housing. The water supply shaft 11 inserted into the bearing portion 421 is in pressure contact with the pressure contact portion 421c while being guided in the shaft hole 421a, and is gradually inserted while the liquid container is vertically held in posture. The outer peripheral surface is crimped in a watertight state while being elastically deformed. Then, when the tip end of the water supply shaft 11 abuts on the inner member 403 fitted to the opening end of the bearing portion 421 in a state where the liquid container is held in the vertical posture by the pressure contact portion 421c, the liquid container moves downward. Accordingly, the tip end portion of the water supply shaft 11 is inserted into the opening end of the inner member 403 and the water supply shaft 11 and the inner member 403 are integrated, and eventually the water supply shaft 11 is inserted from the opening end of the bearing portion 421 on the liquid container side. The tip of is projected (see FIG. 26).

  When the liquid container is removed from the water server, the liquid container is moved upward as opposed to the case where the liquid container is connected, so that the water supply is performed with the liquid container held in the vertical posture by the pressure contact part 421c. The shaft 11 and the inner member 403 are integrally moved, and eventually the inner member 403 is fitted to the opening end of the bearing portion 421 on the liquid container side. Then, after the closing rod 432 abuts on the open end of the bearing portion 421 and the inner member 403 is completely fitted, the water supply shaft 11 is detached from the inner member 403 and the water supply shaft 11 is pulled out of the bearing portion 421 Be

  In addition, as a structure of the bottle cap 401, it is not limited to the Example mentioned above, A various change is possible unless it deviates from the objective of this invention.

  The bottle cap 501 of another embodiment shown in FIG. 27 to FIG. 30 differs from the bottle cap 1, 101, 401 of the embodiment described above in the top surface shape of the main body member 502, and the top surface 520a has an outer edge 522 and a rim edge. The top surface 550 b is formed to be continuous with the portion 523 and to be continuous with the bearing portion 521 and the reinforcing wall portion 525. By this configuration, unlike the above-described embodiment (FIGS. 2 and 3 etc.), the reinforcing ribs 526, 526... Disposed between the bearing portion 521 and the reinforcing wall portion 525 are at the top. Since it is not exposed on the surface side (water shaft insertion side) and the top surface side is smooth and has no unevenness, when connecting the liquid container to the water server, the water supply shaft 11 does not get caught in the unevenness and is easy and reliable for the bearing 521 Can be inserted into

  The main body member 502 of this embodiment includes the top surface portions 520a and 520b forming the top surface, the cylindrical bearing portion 521 formed at the center portion on the top surface side, and the outer edge portion formed on the periphery of the top surface portion 520a. 522, a peripheral flange 523 erected along the insertion direction of the water supply shaft 11 from the top surface 520a, and a peripheral wall 524 formed continuously from the outer peripheral surface of the bearing 521 to the peripheral flange 523; A reinforcing wall portion 525 and the like erected from the top surface portion 520b along the insertion direction of the water supply shaft 11 are integrally formed.

  The bearing portion 522 is provided with an engaging portion 521 b protrudingly provided on the same inner peripheral surface so as to be engageable with the inner member 503, and a water supply which is protruded toward the center direction from the engaging portion 521 b and inserted into the bearing portion 521. A pressure contact portion 521c protruding so as to be in pressure contact with the shaft 11 is respectively formed, and is configured to be able to improve the retention property of the inner member 503 in the bearing portion 521 and the water resistance with the water supply shaft 11. ing.

  The peripheral ridge portion 523 is continuous with the other peripheral edge of the top surface portion 520a and is erected in a cylindrical shape having a circular cross section concentric with the outer edge portion 522, and a water blocking rib 523a is formed along the circumferential direction on the outer peripheral surface It is done. A peripheral wall 524 is formed extending from the peripheral ridge 523 along the insertion direction of the water supply shaft 11, and is an edge of the peripheral wall 524 on the water supply shaft insertion side, and the peripheral ridge is formed on the peripheral edge of the top surface 520b. A plurality of cylindrical reinforcing wall portions 525 having a circular cross section concentric with the portion 523 are provided upright, and a plurality of reinforcing ribs 526, 526,. The bearing portion 521, the peripheral wall portion 524, and the reinforcing wall portion 525 are continuous with each other.

  The reinforcing wall portion 525 is disposed to be separated from the peripheral flange portion 523 and provided between the bearing portion 521 and the peripheral flange portion 523 so that the space between the top surface portions 520 a and 520 b of the main body member 502 is provided. In the plan view, a concave groove 525a having a circular cross section is formed. As described above, the reinforcing wall portion 525 is provided between the bearing portion 521 and the peripheral edge collar portion 523 to form the recessed groove 525a, whereby the opening of the cylindrical opening 10 in the state where the bottle cap 501 is attached to the liquid container. Even when the peripheral flange portion 523 is pressed toward the center direction by the end (protrusion portion 12) to be elastically deformed, the concave groove 525a acts as a buffer groove to prevent the deformation of the bearing portion 521 (shaft hole 521a) Thus, it is possible to prevent the drinking water in the liquid container from leaking out of the machine through the axial hole 521a.

  The configuration of the other main body member 502 and the like is substantially the same as that of the main body member 2 of the above-described embodiment (see FIG. 3 and the like), and thus detailed description of the members having substantially the same shape is omitted.

  In addition, as a structure of the bottle cap 501, it is not limited to the Example mentioned above, A various change is possible unless it deviates from the objective of this invention.

  The bottle cap 601 of another embodiment shown in FIG. 31 to FIG. 34 is formed of the top surface portion 620 whose top surface of the main body member 602 is flush with the bottle cap 501 of the above embodiment. The difference is that the groove is not formed. Specifically, the main body member 602 of the present embodiment is formed on the periphery of the top surface portion 620 forming the top surface, the cylindrical bearing portion 621 formed at the center portion on the top surface side, and the top surface portion 620. Outer rim portion 622, a peripheral flange portion 623 erected along the insertion direction of the water supply shaft 11 from the top surface portion 620, and a peripheral flange portion 623 so as to be separated from the upper surface portion 620 in the insertion direction of the water supply shaft 11 A peripheral wall portion 624 and the like which are erected along are integrally formed.

  The peripheral edge collar portion 623 in the present embodiment is erected in a cylindrical shape having a circular cross section concentric with the outer edge portion 22 from the top surface portion 620, and is disposed to be separated from the peripheral wall portion 624. By forming the rim collar portion 623 in this manner, when the bottle cap 601 is attached to the cylindrical opening 10 (see FIG. 34 and the like), the open end (projection 12) of the cylindrical opening 10 is When it is inserted in the gap between the inner peripheral surface of the outer edge portion 622 and the outer peripheral surface of the peripheral edge collar portion 623 and fitted in the mounting recess 622 a The outer peripheral portion 622 is elastically deformed, and the peripheral edge collar portion 623 is also pressed while being elastically deformed, so that the cylindrical opening 10 is held between the inner peripheral surface of the outer peripheral portion 622 and the outer peripheral surface of the peripheral edge collar portion 623. The main body member 602 is attached to the cylindrical opening 10 in a watertight state.

  The configuration of the other main body member 602 and the like is substantially the same as that of the main body member 502 in the above-described embodiment (see FIG. 27 and the like), and thus detailed description of the members having substantially the same shape is omitted.

  In addition, as a structure of the bottle cap 601, it is not limited to the Example mentioned above, A various change is possible unless it deviates from the objective of this invention.

DESCRIPTION OF SYMBOLS 1 bottle cap 2 main body member 3 inner member 10 cylindrical opening 11 water supply shaft 12 projection 20 top surface 21 bearing 21a axial hole 21b engagement portion 21c pressure contact portion 21d pressure contact projection 22 outer edge portion 22a mounting recess 23 peripheral edge ridge portion 23a Water blocking rib 24 peripheral wall 25 reinforcing wall 25 recessed groove 26 reinforcing rib 30 main body 30a outer circumferential wall 31 outer projection 32 closing rib 33 water blocking rib

Claims (6)

A main body member mounted on a cylindrical opening of a liquid container for water server and used and having a cylindrical bearing in which a water supply shaft of the water server is inserted at the center, and the liquid container side of the bearing A bottle cap having an inner member which is detachably held at the open end,
On the same inner circumferential surface of the bearing portion,
An engagement portion protrudingly engageable with the inner member;
A pressure contact portion that protrudes toward the center direction from the engagement portion and is provided so as to be in pressure contact with the water supply shaft inserted into the bearing portion;
A bottle cap characterized in that each is formed.   The bottle cap according to claim 1, wherein the press-contacting portion is provided with a rib-like press-contacting protrusion that obliquely projects in the insertion direction of the water supply shaft.   The bottle cap according to claim 1 or 2, wherein the pressure contact portion is disposed closer to the water supply shaft insertion side than the engagement portion.   The bottle cap according to any one of claims 1 to 3, wherein the engaging portion is formed so as not to interfere with the water supply shaft when the liquid container is connected to the water server.   The bottle cap according to any one of claims 1 to 4, wherein the engagement portion is engageable with an engagement rib formed on an outer peripheral surface of the inner member.   The said engaging part is arrange | positioned rather than the water stop rib of the said inner member of the state hold | maintained at the opening end by the side of a liquid container in the water supply shaft insertion side as described in any one of Claim 1 thru | or 5 Bottle cap.

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