JP2005200100A - Bottle cap - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bottle cap which can reduce the cost with a less number of parts, and at the same time, can simplify the structure and the motion of a cap automatic fitting device which automatically fits the bottle cap in a bottle mouth section, and also, can prevent the bottom lid from being mistakenly swallowed by a simple structure. <P>SOLUTION: This bottle cap is constituted in such a manner that a bottom lid section 54 is integrally molded on the lower end of an internal cylinder section of a cap main body A, and a notch 54a is formed between the internal cylinder section and the bottom lid section. At the same time, the bottle cap is constituted in such a manner that a bottom lid unsealing section 66 for the bottom lid section may be projected. The bottle cap is also constituted in such a manner that when the internal cylinder section is inserted in a mouth section 50a of a bottle 50 by rotating the cap main body in the sealing direction, the bottom lid unsealing section is closed by the mouth section of the bottle, and is engaged with a throat section at a location having exceeded the throat section 50c in the bottle. The bottle cap is also constituted in such a manner that when the internal cylinder section is removed from the mouth section of the bottle by rotating the cap main body in the unsealing direction, the rising of the bottom lid unsealing section is regulated at the throat section in the bottle, and thus, the bottom lid section is separated from the lower end of the internal cylinder section by the notch, and a raw material C in the internal cylinder section is discharged into the bottle. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a bottle cap that has a raw material container that contains a powdery or liquid raw material, and that opens the lower end of the raw material container in accordance with the opening operation and discharges the raw material into the bottle.

  Conventionally, as this kind of bottle cap, for example, those described in Patent Document 1 (Japanese Utility Model Publication No. 44-12957) and Patent Document 2 (Japanese Patent No. 3281730) are known. As a bottle cap that solves the problem caused by the above, a bottle cap as shown in FIGS. 1 to 4 has been proposed first, and a patent application (Japanese Patent Application No. 2002-272185) has been made and commercialized. 1 and 2 show the state before the assembly, FIG. 3 shows the assembled state, and FIG. 4 shows the state set in the bottle.

  The bottle cap includes a parent cap 1, a child cap 2, and a bottom lid 3 that are molded with resin.

  The parent cap 1 is integrally provided with an outer cylinder 6 having upper and lower ends opened on a cap body 5 that covers a mouth portion 50a of a bottle 50 (FIG. 4) such as a PET bottle. The outer cylinder 6 integrally penetrates the top part 5a of the cap body 5 vertically, and the upper part protruding upward from the top part 5a becomes a mouth part 6a whose upper end is open, and the lower part protruding downward from the top part 5a. Is a hanging cylinder portion 6b that hangs downward from its lower end and opens at its lower end while forming a gap with the body portion 5b of the cap body 5. The drooping cylinder portion 6b is tapered with a step near the top portion 5a, and then gradually tapers toward the lower end opening. A minute step portion 6c that slightly increases the thickness is formed in the middle of the inner peripheral surface of the hanging tube portion 6b.

  A female screw 5c is formed on the inner peripheral surface of the body portion 5b of the cap body 5 to be screwed with the male screw 50b of the mouth portion 50a of the bottle 50, and a male screw is provided on the outer peripheral surface of the mouth portion 6a of the outer cylinder 6. 6d is formed. An anti-slip knurl 5d is formed on the outer peripheral surface of the body portion 5b when the finger is put on it.

  The child cap 2 integrally protrudes from the lower surface of the top portion 8a of the cap body 8 with the inner cylinder 9 serving as a raw material and pressurized gas filling section (capsule), and is thin at a position close to the outer periphery of the inner cylinder 9. A short sealing ring 10 is integrally projected. The inner cylinder 9 protrudes much longer than that while forming a gap with the body portion 8b of the cap body 8. The inner cylinder 9 is slightly smaller in diameter than the outer cylinder 6 and can be inserted with a slight gap between the inner cylinder 6 but the length is slightly longer than the outer cylinder 6. Yes. The inner cylinder 9 has the same inner diameter from the upper end to the lower end, but the outer diameter gradually decreases from the upper end to the lower end so that the thickness of the inner cylinder 9 is gradually reduced, and the lower end edge is outward. A protruding edge 9e is formed. Further, on the outer peripheral surface of the inner cylinder 9, a minute step portion 9 c that is slightly thinned is formed.

  An annular lower peripheral edge portion 8c of the trunk portion 8b of the child cap 2 is separable from an upper portion thereof by a thin notch 8d extending over the entire circumference. On the inner peripheral surface of the body portion 8b above the notch 8d, a female screw 8e that is screwed with the male screw 6d of the mouth portion 6a of the outer cylinder 6 is formed. As shown in FIG. 3, the female screw 8e is screwed into the male screw 6c, and the child cap 2 is moved to the mouth of the outer cylinder 6 until the annular lower peripheral edge portion 8c forcibly exceeds the end of the male screw 6d. If it covers 6a, mouth part 6a will be sealed airtight and liquid-tight. At this time, the child cap 2 has its annular lower peripheral edge portion 8c fixed so as not to rotate with respect to the mouth portion 6a, and the lower end portion of the inner cylinder 9 projects from the lower end opening of the drooping cylinder portion 6b of the outer cylinder 6, A minute step portion 9c in the middle of the outer peripheral surface of the inner cylinder 9 and a minute step portion 6c in the middle of the inner peripheral surface of the outer cylinder 6 are close to each other and vertically face each other. Further, the sealing ring 10 is press-fitted into the mouth portion 6 a of the outer cylinder 6, the top portion 8 a of the child cap 2 is pressed against the upper end of the outer tube 6, and the sealing ring 10 is connected to the corner portion of the trunk portion 8 b of the child cap 2. Thus, the mouth portion 6a of the outer cylinder 6 is clamped from inside and outside. An anti-slip knurl 8f is formed on the outer peripheral surface of the body portion 8b, and an arrow 8g is provided on the top surface of the top portion 8a so as to indicate the opening direction.

  The bottom cover 3 includes a pressing portion 3a having a convex upper surface and a concave lower surface, an annular recess 3c that forms an annular groove 3b having a reverse Ω-shaped cross section with the periphery of the pressing portion 3a, and a concave surface of the pressing portion 3a. A protrusion 3d protruding downward from the center of the lower surface is integrally formed. While the lower end portion of the inner cylinder 9 is forcibly fitted into the annular groove 3b, and the pushing portion 3a is pushed into the inner cylinder 9, the bottom lid 3 is made of pressurized gas (inert gas) as shown in FIG. And the lower end opening of the inner cylinder 9 filled with the raw material 11 is hermetically and liquid-tightly sealed.

  In such a bottle cap, when the inner cylinder 9 is raised in the direction of opening the child cap 2, the upper edge of the annular recess 3 c of the bottom cover 3 comes into contact with the lower end edge of the outer cylinder 6 and the bottom cover 3. Is restrained from rising further, the fitting of the protruding edge 9e at the lower end of the inner cylinder 6 and the annular recess 3c of the bottom cover 3 is disengaged, and the bottom cover 3 is detached from the inner cylinder 9 that is further rising. . When this falls off, the raw material 11 in the inner cylinder 9 is ejected at a stretch together with the pressure gas. The bottom lid 3 settles in the liquid in the bottle.

However, according to this, there were the following problems.
(1) Consists of three parts, a parent cap 1, a child cap 2 and a bottom lid 3. Particularly, since the parent cap 1 has a complicated structure, the cost increases and the bottle cap is automatically attached to the bottle mouth. Also, the structure and operation of the automatic cap mounting device to be mounted on the device becomes complicated.

(2) Since the parent cap 1 and the child cap 2 are in a state of overlapping the upper and lower two steps outside the mouth portion 50a of the bottle 50, the height of the entire cap becomes as high as twice that of a normal cap, There are many obstacles.

(3) After the bottom cap 3 is dropped from the inner cylinder 9 by opening the child cap 2, normally only the child cap 2 is removed from the parent cap 1, and the parent cap 1 is a bottle so as not to accidentally swallow the bottom lid 3. 50, but leave it in the mouth part 50a, but even if it is written in such a way that it should be drunk, the parent cap 1 is forcibly removed from the mouth of the bottle by mischief, and the parent cap 1 comes off There was an example that the bottom lid 3 was accidentally swallowed by drinking with the mouth part of a bottle.

(4) In the child cap 2 and the bottom lid 3, by fitting the bulging ridge 9e at the lower end of the former inner cylinder 9 and the annular concave groove 3b having an inverted cross-sectional shape of the latter annular concave portion 3c, Although an attempt was made to improve the sealing performance of the bottom lid 3 with respect to the lower end opening of the inner cylinder 9, it was not sufficient to ensure the airtightness of the inner cylinder 6 in which the pressure gas was sealed.

(5) A part of the outer cylinder 6 of the parent cap 1, that is, the hanging cylinder part 6 b remains in the bottle mouth even after the child cap 2 is opened, and the entry part is the opening of the bottle mouth. Since this hinders the outflow of liquid from the liquid, there is a problem that a small amount of unsold drink is generated.

(6) The child cap 2 is formed with a thin notch 8d extending over the entire circumference in the body portion 8b, so that the upper part of the notch 8d is separated from the lower annular lower peripheral part 8c, and the annular lower peripheral edge The portion 8c remains in the mouth of the bottle. However, since a large twisting force is required for the separation, the parent cap 1 may be detached from the mouth of the bottle by turning to the parent cap 1.
Japanese Utility Model Publication No. 44-12957 (first page, FIG. 1, FIG. 2) Japanese Patent No. 3281730 (Page 2, FIGS. 1 and 3)

  The first problem of the present invention is that even if the parent cap in the above-described conventional example is omitted, the same action, that is, the raw material can be discharged into the bottle by separating the bottom cover of the raw material container in accordance with the opening operation. In addition to reducing the cost, the structure and operation of the automatic cap mounting device that automatically mounts the bottle cap on the bottle mouth can be simplified, and accidental swallowing of the bottom lid can be prevented with a simple structure. An object of the present invention is to provide a bottle cap that does not cause leftovers based on a cylinder.

  The second problem of the present invention is to improve the sealing performance of the bottom lid so that the airtightness can be sufficiently ensured even when the pressure gas is sealed in the raw material container.

The bottle cap according to the first aspect of the present invention includes an outer cylinder portion formed on the inner periphery with a screw that is screwed to a screw on the outer periphery of the mouth portion of the bottle, a ceiling portion that seals the opening of the mouth portion of the bottle, A bottom lid portion that closes the lower end of the inner cylinder portion with respect to the cap body having an inner cylinder portion that is suspended from the ceiling portion and inserted into the mouth portion of the bottle and serves as a raw material storage portion, It is integrally formed, and a cut is formed between the inner cylinder part and the bottom cover part.
And when rotating the cap body in the sealing direction and inserting the inner cylinder part into the mouth part of the bottle, when the part of the bottom cover part exceeds the throat part in the bottle, the throat part is engaged, When rotating the cap body in the opening direction and pulling out the inner cylinder part from the mouth part of the bottle, at least a part of the bottom lid part is separated from the lower end of the inner cylinder part by cutting, and the lower end of the inner cylinder part opens. Thereby, the raw material in an inner cylinder part is discharge | released in a bottle.

The bottle cap according to the second aspect of the present invention includes an outer cylinder portion formed on the inner periphery with a screw that engages with an outer peripheral screw of the bottle mouth portion, a ceiling portion that seals the opening of the mouth portion of the bottle, A bottom lid portion that closes the lower end of the inner cylinder portion with respect to the cap body having the inner cylinder portion that hangs down from the ceiling portion and is inserted into the mouth portion of the bottle and serves as a raw material storage portion, It is weld-molded so as to be separable with a different resin.
And when rotating the cap body in the sealing direction and inserting the inner cylinder part into the mouth part of the bottle, when the part of the bottom cover part exceeds the throat part in the bottle, the throat part is engaged, When rotating the cap body in the opening direction and pulling out the inner cylinder part from the mouth part of the bottle, the bottom lid part is restricted from rising at the throat part in the bottle, and at least a part of the bottom lid part is the inner cylinder part When the lower end of the inner cylinder part is opened from the lower end of the tube, the raw material in the inner cylinder part is discharged into the bottle.

  In the case of the bottle caps of the first form and the second form, a bottom cover opening part that can be elastically deformed protrudes from the outer periphery of the bottom cover part, the cap body is rotated in the sealing direction, and the inner cylinder part is When inserting into the mouth part, the bottom lid opening part is closed by the mouth part of the bottle and restored to the open state beyond the throat part in the bottle, and is engaged with the throat part, When rotating the main body in the opening direction and pulling out the inner cylinder part from the mouth part of the bottle, the bottom cover opening part in the opened state is restricted from rising at the throat part in the bottle, and at least the bottom cover part It can be made the structure which a part isolate | separates from the lower end of an inner cylinder part.

  Alternatively, if an engaging protrusion that engages with each other and restricts the rise of the bottom lid when the cap body is opened is formed on the throat of the bottle and the outer periphery of the bottom lid, the bottom lid is opened as described above. The part can be omitted.

  A raw material inlet for the inner tube portion is formed in the ceiling portion of the cap body, and this raw material inlet is sealed with an upper lid. The top lid can be separated from the cap body, but if the bottle cap is integrally formed with the cap body by an elastically deformable hinge, it can be integrated with the cap body. It becomes one part. The upper surface of the upper lid may be covered with the attached sheet material together with the upper surface of the surrounding ceiling.

The bottle cap of the 3rd form of this invention consists of a cap main body and a bottom cover.
The cap body includes an outer tube portion formed on the inner periphery with a screw that engages with an outer peripheral screw of the bottle mouth portion, a ceiling portion that seals the opening of the bottle mouth portion, and a bottle that hangs down from the ceiling portion. And an inner cylinder part serving as a raw material storage part.
In order to detachably seal the lower end opening of the inner cylinder part of the cap main body, the bottom cover is integrally formed with an annular concave part on the periphery, which can press-fit the lower end part of the inner cylinder part.
When the cap body is rotated in the sealing direction and the inner cylinder portion is inserted into the mouth portion of the bottle, the cap portion engages with the throat portion when the bottom lid partly exceeds the throat portion in the bottle. When rotating the main body in the opening direction and pulling out the inner cylinder part from the mouth part of the bottle, the bottom lid is restricted from rising at the throat part in the bottle and separated from the lower end of the inner cylinder part. By opening the lower end of the material, the raw material in the inner cylinder part is discharged into the bottle.

  In the case of the bottle cap of the third form, a bottom lid opening portion that can be elastically deformed is projected on the outer periphery of the bottom lid, the cap body is rotated in the sealing direction, and the inner cylinder portion is inserted into the mouth portion of the bottle. When opening, the bottom lid opening part is closed by the mouth of the bottle and restored to the open state beyond the throat part in the bottle and engaged with the throat part, and the cap body is rotated in the opening direction. When the inner cylinder part is pulled out from the mouth part of the bottle, the bottom lid opening part in the open state is restricted from rising at the throat part in the bottle and the bottom lid is separated from the lower end of the inner cylinder part Can be.

  In any case of the first, second and third modes, the concrete structure of the bottom lid opening portion is formed to project in an annular shape and open and close by changing its outer diameter by elastic deformation, A form in which a large number of tooth portions whose projecting height decreases toward the lower end is formed in a projecting manner is preferable. Alternatively, it may be configured by a plurality of claw portions that are divided and protruded, and these may be opened and closed by elastic deformation.

  If a protrusion that engages with the bottom lid opening portion is formed in the throat of the bottle, the bottom lid can be reliably removed by the bottom lid opening portion.

  In the case of the third embodiment, in order to achieve the second problem, a packing made of a softer material than the annular recess is integrally provided on the inner surface of the annular recess of the bottom cover by simultaneous molding. The packing may be embedded in the annular recess with a part thereof protruding from the inner surface of the annular recess.

  In the first and second embodiments of the present invention, the bottom lid portion is integrally formed at the lower end of the inner cylinder portion of the cap body, and in the third embodiment, two parts of the cap body and the bottom lid are formed. 1 to 4, the main cap in the conventional example can be omitted, and the cap main body can be obtained by engaging a part of the bottom lid or the bottom lid opening provided on the bottom lid with the throat inside the bottle. Since the bottom lid can be separated with the opening operation of the bottle, the structure is significantly simpler than before, the cost can be reduced, and the structure and operation of the automatic cap mounting device that automatically mounts the bottle cap on the bottle mouth Will also be simple. In addition, the bottom lid does not pass through the bottle mouth and out of the bottle by the engaging protrusion provided on the bottom lid or the bottom lid opening portion even after being separated. Will not happen. Further, when the cap main body is removed from the bottle mouth portion, the inner cylinder portion which is the raw material storage portion is also pulled out integrally therewith, so that there is no leftover as in the conventional case.

  If a large number of teeth are formed on the outer peripheral surface of the bottom lid opening part, the protrusion height decreases toward the lower end, the cap body is rotated in the sealing direction and the inner cylinder part is inserted into the mouth of the bottle. When opening, the bottom lid opening part can be closed smoothly, and when rotating the cap body in the opening direction and pulling out the inner cylinder part from the mouth part of the bottle, the upper ends of many tooth parts are The bottom lid can be reliably separated by engaging with the inner throat.

  In the case of the first embodiment, since the bottom lid portion is integrally formed at the lower end of the inner cylinder portion of the cap body, and at least a part of the bottom lid portion is separated from the lower end of the inner cylinder portion by cutting, the inner cylinder portion There is no sealing problem between the base and the bottom lid. In addition, the molding cost can be greatly reduced.

  In the case of the second embodiment, the lower end of the inner cylinder part of the cap body is weld-molded so as to be separable with a resin different from the inner cylinder part (so-called simultaneous molding of different materials), so between the inner cylinder part and the bottom lid The sealing problem does not occur at all, and the molding cost can be greatly reduced.

  In the case of the first and second embodiments, the raw material inlet is formed in the ceiling portion of the cap body, and this is sealed with the upper lid, so that the raw material and pressure medium to the inner cylinder portion, which is the raw material storage portion, and further removed. The oxygen agent and the like can be easily enclosed, and the automatic enclosure device is simple and low in cost.

  If the upper lid is made to be integral with the ceiling of the cap body by a hinge part that can be elastically deformed, and integrally molded with the cap body, the bottle cap becomes an all-in-one single part. It becomes more advantageous in all aspects of automatic encapsulation.

  Furthermore, after sealing in the inner cylinder part, if the upper surface of the upper lid is covered with the attached sheet material together with the upper surface of the surrounding ceiling part, the sealing property of the upper lid can be improved and the upper lid is sealed with the upper lid. Since it is not apparent from the appearance, it is possible to prevent the lid from being opened due to mischief before drinking.

  In the case of the third embodiment, when a soft material packing is provided on the inner surface of the annular recess at the periphery of the bottom cover by simultaneous molding, the inner recess of the child cap is sealed in the annular recess when the lower end opening of the inner cylinder is sealed with the bottom cover. In addition to the lower end of the cylinder being press-fitted, the seal is very close because the packing is compressed in the annular recess, so the sealing performance is very high, and pressure gas is sealed in the inner cylinder. Even if it is, the airtightness can be sufficiently secured.

  When the packing is embedded in the annular recess, the integrity of the packing and the annular recess is enhanced, and the moldability of the packing is improved.

  Next, embodiments of the present invention will be described in detail with reference to the drawings.

  As shown in FIGS. 5, 6, and 7, the bottle cap according to the first embodiment is composed of two parts: a cap body A that is resin-molded and a disc-shaped upper lid D that is resin-molded separately. . Moreover, the sheet material E is affixed on the upper cover D as needed.

  The cap body A is formed by integrally molding an outer cylinder part 51, a ceiling part 52 having a circular raw material inlet 52a, an inner cylinder part 53 depending from the ceiling part 52, and a bottom lid part 54 at the lower end thereof. It is. A screw 51c is formed on the inner peripheral surface of the outer cylinder portion 51. The screw 51c is screwed with a screw 50b provided on the outer peripheral surface of the mouth portion 50a of the bottle 50 such as a PET bottle shown in FIGS. Further, by forming a thin notch 55 over the entire circumference in the lower peripheral edge portion of the outer cylinder portion 51, a portion above the notch 55 can be forcibly separated from the lower annular lower peripheral edge portion 56. It has become. The inner peripheral surface of the lower peripheral edge portion 56 below the notch 55 of the outer cylinder portion 51 is an inclined surface, and an annular step portion 51b is formed on the upper side thereof. On the outer peripheral surface of the outer cylinder portion 51, a knurling for anti-slip (vertical streak) 51 a when being opened with a finger is engraved on the upper side of the notch 55.

  The inner cylinder part 53 becomes a raw material and a pressure gas filling part (capsule), and it is vertically suspended from the peripheral edge of the raw material charging port 52a of the ceiling part 52 by forming a step part 52b at the opening peripheral edge. The length extends from the mouth 50a beyond the throat 50c in the bottle into the bottle body 50d. The upper portion 53a of the inner cylinder portion 53 is sized such that its outer peripheral surface is in close contact with the inner peripheral surface of the bottle mouth portion 50a, but the intermediate portion 53b is gradually narrowed downward, and the lower portion 53c is The size is such that a gap is formed between the inner peripheral surface of the bottle mouth portion 50a and the throat portion 50c in the bottle.

  The bottom cover part 54 is integrated with the inner cylinder part 53 so as to close the lower end of the inner cylinder part 53, but can be separated from the inner cylinder part 53 by a cut 54 formed on the outer peripheral surface. . On the outer peripheral surface of the bottom cover portion 54, a plurality of claw portions 66 having spring properties are integrally projected in a diagonally upward direction and radially as a whole. As will be described later, these claw portions 66 function as a bottom lid opening portion that separates the bottom lid portion 54 from the inner cylinder portion 53 at the cut 54. A frustoconical protrusion 61 projecting downward is integrally formed at the center of the bottom surface of the bottom lid portion 54 that is a concave surface.

  The upper lid D is disk-shaped and has a stepped portion 67 on the periphery of its lower surface. The upper lid D is for putting the raw material C together with the pressure gas into the inner cylindrical portion 53 and sealing the raw material charging port 52a. At that time, the step portion 67 of the upper lid D and the step portion 52b on the peripheral edge of the raw material charging port 52a. And the fitting part is adhered with an adhesive (for example, hot melt) or the like. And the sheet | seat material E is affixed from it (for example, a paper seal is affixed), and the upper surface of the upper cover D is covered with the surrounding ceiling part upper surface. If it does in this way, while being able to improve the sealing performance between the upper cover D and the raw material insertion port 52a, it can hide that it is sealing with the upper cover D.

  The raw material C stored in the inner cylinder 53 includes green tea, coffee, black tea, concentrated minerals, deep sea water extracted minerals, health foods, drugs, concentrated fruit juice, dairy products, alcohol, concentrated vegetables, soup ingredients, vitamins, Examples include saccharides, medicinal herbs, fermenting bacteria and the like in powders, granules, tablets and liquids. Further, the pressure gas is preferably an inert gas that can safely maintain the quality of the raw material C, and examples thereof include nitrogen, helium, argon, carbon dioxide, nitrous oxide, or a mixed gas thereof. Further, an oxygen scavenger or the like can be enclosed.

  In order to attach the bottle cap of Example 1 thus configured to the mouth portion 50a of the bottle 50, as shown in FIG. 8, the bottom lid portion 54 is first pushed into the bottle mouth portion 50a and the inner cylinder is inserted. The portion 53 is inserted into the bottle mouth portion 50a, and the cap body A is rotated in the sealing direction. When the bottom lid 54 is pushed into the bottle mouth portion 50a, the radial claw portions 66 are inclined obliquely upward, so that all the claw portions 66 are elastically deformed without difficulty while being pushed in smoothly. The inner cylinder portion 53 can be inserted into the bottle mouth portion 50a while the claw portion 64 is in sliding contact with the inner peripheral surface of the bottle mouth portion 50a.

  Therefore, while turning the cap main body A in the sealing direction, the screw 51c of the outer cylinder part 51 is screwed into the screw 50b of the bottle mouth part 50a, and the inner peripheral surface of the outer cylinder part 51 as shown in FIG. The annular stepped portion 51b is forcibly screwed up to a position beyond the annular convex portion 50e on the outer peripheral surface of the bottle mouth portion 50a. At this time, since the inner peripheral surface of the lower peripheral edge portion 56 of the outer cylindrical portion 51 is an inclined surface, the annular convex portion 50e is smoothly overcome, and the annular step portion 51b is engaged with the flat lower surface of the annular convex portion 50e. .

On the other hand, in the bottle mouth part 50a, the inner cylinder part 53 has a length that extends into the bottle body part 50d. Therefore, the bottom cover part 54 exceeds the throat part 50c in the bottle, and the entire claw part 66 is It restores to the open state and engages with the lower surface of the throat 50c.
In this state, the bottle mouth portion 50a is sealed.

  When the cap body A is rotated in the opening direction in such a sealed state, as shown in FIG. 9, the portion above the notch 55 of the outer cylinder portion 51 can rise, but the lower portion below the notch 55 Since the annular step portion 51b is engaged with the lower surface of the annular convex portion 50e, the peripheral edge portion 56 cannot be raised and remains separated from the upper portion at the notch 55 as shown in FIG.

  Therefore, since the cap body A cannot be turned unless a force is applied to force such separation, the sealed state can be reliably maintained.

  On the other hand, in the bottle mouth portion 50a, when the cap body A is turned in the opening direction, the inner cylinder portion 53 rises while rotating, whereas the bottom lid portion 54 has a throat with all the claws 66 open. Since it is engaged with the lower surface of the part 50c, it cannot be raised, and the bottom cover part 54 is separated from the inner cylinder part 53 that is further raised by the cut 54a as shown in FIG. . If this falls off, the raw material C in the inner cylinder part 53 will be ejected at a stretch together with the pressure gas, and the bottom cover part 54 will settle in the liquid in the bottle 50. Since the protrusion 61 is provided on the lower surface of the bottom lid portion 54, the bottom lid portion 54 does not sink while shaking greatly.

  The bottom lid part 54 that has fallen out has a radial outer diameter of all the claw parts 66 restored to the open state that is larger than the inner diameter of the bottle mouth part 50a, and therefore does not pass out of the bottle mouth part 50a. .

  The notch 54 a is formed not on the entire circumference but leaving a part, and only the bottom cover 54 does not separate from the lower end of the inner cylinder 53, and the bottom cover 54 falls off from the lower end of the inner cylinder 53. You may make it the lower end of the inner cylinder part 53 open in the state drooped without.

  FIG. 11 shows a modification of the first embodiment, in which the claw 66 has a spherical tip. If it does in this way, insertion to the bottle mouth part 50a can be performed more smoothly, without damaging the internal peripheral surface.

Next, Example 2 will be described.
As shown in FIGS. 12 and 13, the bottle cap according to the second embodiment is composed of two parts, a cap body A that is resin-molded and a bottom lid B that is resin-molded separately.

  The cap body A is formed by integrally forming an outer cylinder part 51, a ceiling part 52, and an inner cylinder part 53 depending from the ceiling part 52. On the inner peripheral surface of the outer cylinder portion 51, a screw 51c that is screwed with a screw 50b provided on the outer peripheral surface of the mouth portion 50a of a bottle 50 such as a plastic bottle shown in FIGS. 14 and 15 is formed. Further, by forming a thin notch 55 over the entire circumference in the lower peripheral edge portion of the outer cylinder portion 51, a portion above the notch 55 can be forcibly separated from the lower annular lower peripheral edge portion 56. It has become. On the inner peripheral surface of the lower peripheral edge portion 56, an inner annular protrusion 57 having spring properties is formed to protrude all around, and the inner peripheral surface of the inner annular protrusion 57 protrudes toward the lower end. A large number of triangular teeth 57a whose height is lowered are formed in a wave-like manner over the entire circumference at predetermined intervals. On the outer peripheral surface of the outer cylinder portion 51, a knurling for anti-slip (vertical streak) 51 a when being opened with a finger is engraved on the upper side of the notch 55.

  The inner cylinder part 53 is integrally suspended from the lower surface of the ceiling part 52, and has a length that extends from the bottle mouth part 50a beyond the throat part 50c in the bottle into the bottle body part 50d. The upper portion 53a of the inner cylinder portion 53 is sized such that its outer peripheral surface is in close contact with the inner peripheral surface of the bottle mouth portion 50a, but the intermediate portion 53b is gradually narrowed downward, and the lower portion 53c is The size is such that a gap is formed between the inner peripheral surface of the bottle mouth portion 50a and the throat portion 50c in the bottle. Moreover, the lower end edge of the inner cylinder part 53 becomes the protruding edge 53d which bulges outside.

  The bottom cover B includes a pressing portion 58 having a convex upper surface and a concave bottom surface, an annular recess 60 that forms an annular groove 59 having a reverse Ω cross section at the periphery of the pressing portion 58, and a concave surface of the pressing portion 58. A frustoconical protrusion 61 that protrudes downward from the center of the lower surface and an annular bottom lid opening portion 62 that protrudes obliquely upward from the outer surface of the annular recess 60 are integrally formed.

  In the annular recess 60 of the bottom lid B, an annular packing 63 made of a material softer than the annular recess 60, such as silicon rubber or polypropylene, is integrally formed with the inner surface of the annular recess 60 by simultaneous molding with the annular recess 60. Is provided. Specifically, the packing 63 is partly protruded from the inner surface of the annular recess 60 and embedded in the bottom of the annular recess 60, and is integrated with the annular recess 60.

  The bottom lid opening portion 62 of the bottom lid B is provided with spring properties by a recess 64 formed between the base portion thereof, that is, the annular recess 60, and opens and closes toward the annular recess 60 (expands outward, In the normal state in which the bottom lid opening portion 62 is open, the outer diameter of the bottom lid opening portion 62 is larger than the inner diameter of the bottle mouth portion 50a. On the outer peripheral surface of the bottom lid opening portion 62, a large number of triangular tooth portions 65 whose projecting height decreases toward the lower end are formed so as to project in a wave shape over the entire circumference at predetermined intervals.

Example 2 configured as described above is in an assembled state as follows.
As shown in FIG. 12, the annular concave groove 59 having an inverted Ω cross section of the annular concave portion 60 of the bottom cover B and the bulging protruding edge 53 d at the lower end of the inner cylindrical portion 53 of the cap body A are forcibly fitted. The protruding portion of the packing 63 is compressed at the lower end of the inner cylinder portion 53. As a result, the bulging edge 53d at the lower end of the inner cylindrical portion 53 is pressed into the annular groove 59 having a reverse Ω-shaped cross section while the protruding portion of the packing 63 is compressed. The closure by the bottom lid B has a very high sealing performance, and even if the pressure gas is sealed in the inner cylinder portion 53, the airtightness can be sufficiently secured.

  After the raw material C is put together with the pressure gas in the inner cylindrical portion 53 of the cap body A and sealed with the bottom lid B as described above, as shown in FIG. The inner cylinder part 53 is inserted into the bottle mouth part 50a by being pushed into the bottle mouth part 50a, and the cap body A is rotated in the sealing direction. When pushing the bottom lid B into the bottle mouth portion 50a, since the protruding heights of the many tooth portions 65 on the outer peripheral surface of the bottom lid opening portion 62 are lowered toward the lower end, The bottom lid opening portion 62 is elastically deformed without difficulty and is in a deflated state (closed state), and the inner cylinder portion 53 follows the bottom lid B while the tooth portion 65 is in sliding contact with the inner peripheral surface of the bottle mouth portion 50a. Can be inserted into the bottle mouth portion 50a.

  While turning the cap main body A in the sealing direction, the screw 51c of the outer tube portion 51 is screwed into the screw 50b of the bottle mouth portion 50a, and the inner annular protrusion 57 of the outer tube portion 51 is formed as shown in FIG. Then, the bottle mouth portion 50a is screwed up to a position beyond the annular convex portion 50e on the outer peripheral surface. At this time, on the inner peripheral surface of the lower peripheral edge portion 56 of the outer cylindrical portion 51, a large number of tooth portions 57a whose projecting height decreases toward the lower end are formed, and the upper surface of the annular convex portion 50e is a slope. Therefore, these tooth portions 57c smoothly go over the annular protrusion 50e, and the inner annular protrusion 57 engages with the flat lower surface of the annular protrusion 50e.

On the other hand, in the bottle mouth part 50a, as shown in FIG. 15, since the inner cylinder part 53 has a length that extends into the bottle body part 50d, the bottom lid B exceeds the throat part 50c in the bottle, The bottom lid opening portion 62 is restored to the open state and engaged with the lower surface of the throat portion 50c.
In this state, the bottle mouth portion 50a is sealed.

  When the cap body A is rotated in the opening direction in such a sealed state, as shown in FIG. 16, the upper part of the outer cylinder part 51 above the notch 55 can rise, but the lower part below the notch 55 Since the inner annular protrusion 57 is engaged with the lower surface of the annular protrusion 50e, the peripheral portion 56 cannot be raised and remains separated from the upper portion at the cut 55.

  Therefore, since the cap body A cannot be turned unless a force is applied to force such separation, the sealed state can be reliably maintained.

  On the other hand, in the bottle mouth portion 50a, when the cap body A is turned in the opening direction, the inner cylinder portion 53 rises while rotating, whereas the bottom lid B has a throat with the bottom lid opening portion 62 opened. Since it is engaged with the lower surface of the portion 50c, it cannot be raised, and the bottom lid B comes off and falls off from the ascending inner cylinder portion 53 as shown in FIG. If this falls off, the raw material C in the inner cylinder part 53 will be ejected at a stretch together with the pressure gas, and the bottom lid B will settle in the liquid in the bottle 50. Since there is the protrusion 61 on the lower surface of the bottom lid B, the bottom lid B does not sink while shaking greatly.

  Since the bottom cover B that has fallen out has an outer diameter of the bottom cover opening part 62 restored to the open state is larger than the inner diameter of the bottle mouth part 50a, it does not pass through the bottle mouth part 50a and escape out of the bottle.

  In addition, as shown in FIG. 17, if the protrusion 50f is formed in the periphery of the throat part 50c in a bottle, since the bottom cover opening part 62 of the bottom cover B will engage with this, the fall of the bottom cover B will be ensured. Yes.

  Further, the bottom lid opening portion 62 is not formed in an annular shape, but may be constituted by a plurality of claw portions 66 having spring properties divided in the circumferential direction as shown in FIG. These claw portions 66 project radially and integrally from the outer peripheral surface of the annular recess 60 obliquely upward.

  Further, with respect to the cap main body A, in Example 2, the inner annular protrusion 57 having a spring property with a large number of teeth 57a formed on the peripheral edge of the lower end of the outer cylinder 51, the structure as shown in FIG. It may be. That is, the inner peripheral surface of the lower peripheral edge portion 56 below the notch 55 of the outer cylinder portion 51 is a slope, and an annular stepped portion 51b is formed on the upper side thereof. In the sealed state of the cap body A, the lower peripheral edge portion 56 is When the annular step 51b is engaged with the annular protrusion 50e beyond the annular protrusion 50e of the bottle mouth portion 50a, the cap body A is separated from the notch 55 up and down when the cap body A is opened. ing.

Next, Example 3 shown in FIGS. 20 to 22 will be described.
The bottle cap according to the third embodiment is a single part in which a resin-molded cap body A and a disc-shaped upper lid D are integrally molded, and a sheet material E is stuck on the upper lid D as necessary.

  As in the case of the first embodiment, the cap body A includes an outer cylinder part 51, a ceiling part 52 having a circular raw material inlet 52a, an inner cylinder part 53 depending from the ceiling part 52, and a bottom at the bottom thereof. The lid 54 is integrally molded together with the upper lid D. On the inner peripheral surface of the outer cylinder portion 51, a screw 51c that is screwed with a screw 50b provided on the outer peripheral surface of the mouth portion 50a of the bottle 50 is formed. Further, by forming a thin notch 55 over the entire circumference in the lower peripheral edge portion of the outer cylinder portion 51, a portion above the notch 55 can be forcibly separated from the lower annular lower peripheral edge portion 56. It has become. The inner peripheral surface of the lower peripheral edge portion 56 below the notch 55 of the outer cylinder portion 51 is an inclined surface, and an annular step portion 51b is formed on the upper side thereof. On the outer peripheral surface of the outer cylinder portion 51, a knurling for anti-slip (vertical streak) when being opened with a finger is engraved on the upper side of the notch 55.

  As in the case of the first embodiment, the inner cylinder portion 53 is integrally suspended from the periphery of the raw material charging port 52a of the ceiling portion 52 by forming a stepped portion 52b around the opening periphery, and from the bottle mouth portion 50a. It has a length that extends beyond the throat 50c in the bottle and into the bottle body 50d. The upper portion 53a of the inner cylinder portion 53 is sized such that its outer peripheral surface is in close contact with the inner peripheral surface of the bottle mouth portion 50a, but the intermediate portion 53b is gradually narrowed downward, and the lower portion 53c is The size is such that a gap is formed between the inner peripheral surface of the bottle mouth portion 50a and the throat portion 50c in the bottle.

  The bottom cover part 54 is integrated with the inner cylinder part 53 so as to close the lower end of the inner cylinder part 53, but can be separated from the inner cylinder part 53 by a cut 54 formed on the outer peripheral surface. . The notch 54 has a shape with an enlarged mouth. An engaging protrusion 54b having an outer peripheral surface as an inclined surface is integrally formed as a bottom lid opening portion on the lower side of the notch 54 by gradually reducing the thickness downward.

  The upper lid D is disk-shaped and has a stepped portion 67 on the periphery of the lower surface thereof as in the case of the first embodiment. However, the ceiling portion 52 and a part of the cap body A are integrally connected as a hinge portion 52c. Thus, the cap body A is integrally formed. Since the hinge part 52c is limited and formed, it can be elastically deformed, and the upper lid D can be opened and closed with respect to the raw material charging port 52a. The upper lid D is also fitted with the stepped portion 67 and the stepped portion 52b at the periphery of the opening of the raw material charging port 52a, and the fitting portion is adhered and sealed with an adhesive (for example, hot melt). And the sheet | seat material E is stuck from the top, and the upper surface of the upper cover D is covered with the surrounding ceiling part upper surface.

  On the other hand, on the inner peripheral surface of the throat portion 50c in the bottle, an engagement protrusion 50g having an inner peripheral surface as an inclined surface is formed integrally by gradually increasing the thickness downward.

  In order to attach the bottle cap of the third embodiment to the mouth portion 50a of the bottle 50, the screw 51c of the outer cylinder portion 51 is connected to the bottle mouth portion while turning the cap body A in the sealing direction as shown in FIG. As shown in FIG. 22, the annular stepped portion 51b on the inner peripheral surface of the outer cylinder portion 51 is forced to the point where it exceeds the annular convex portion 50e on the outer peripheral surface of the bottle mouth portion 50a. To screw. At this time, since the inner peripheral surface of the lower peripheral edge portion 56 of the outer cylindrical portion 51 is an inclined surface, the annular convex portion 50e is smoothly overcome, and the annular step portion 51b is engaged with the flat lower surface of the annular convex portion 50e. .

  At this time, in the bottle mouth portion 50a, the inclined protrusion of the outer peripheral engagement protrusion (bottom cover opening portion) 54b on the outer periphery of the bottom lid portion 54 is close to the end, and the inner peripheral engagement protrusion of the throat portion 50c of the bottle 50 While sliding on the inclined surface of the portion 50g, the inclined surface of the engaging protrusion 50g is crossed, and finally, as shown in FIG. 22, the engaging protrusion 54b of the bottom lid portion 54 is below the engaging protrusion 50g. The engaging projection 50g of the throat portion 50c slightly enters the mouth where the notch 54a of the bottom lid portion 54 is widened. In this state, the bottle mouth portion 50a is sealed.

  When the cap body A is rotated in the opening direction in such a sealed state, the upper part of the outer cylinder part 51 above the notch 55 can be raised as in the case of the first embodiment. The lower peripheral edge portion 56 cannot be raised because the annular step portion 51 b is engaged with the lower surface of the annular convex portion 50 e, and remains separated from the upper portion at the cut 55.

  On the other hand, in the bottle mouth portion 50a, when the cap main body A is turned in the opening direction, the inner cylinder portion 53 rises while rotating, whereas the bottom lid portion 54 has an engaging projection 54b of the throat portion 50c. Since it is engaged with the lower surface of the engaging projection 50g, it cannot be raised, and the bottom lid 54 is separated from the inner cylinder 53 that is further raised by the cut 54a and falls off.

  The bottom cover part 54 that has fallen out has an engagement protrusion 54b larger than the inner diameter of the throat part 50c, and therefore does not pass out of the bottle mouth part 50a and out of the bottle.

  Also in the case of the third embodiment, the notch 54a is formed not on the entire circumference but on a part thereof, and only the bottom cover part 54 is not separated from the lower end of the inner cylinder part 53, and the bottom cover part 54 is formed on the inner cylinder. You may make it the lower end of the inner cylinder part 53 open in the state which hung down without dropping from the lower end of the part 53. FIG.

Next, Example 4 shown in FIGS. 23 and 24 will be described.
The bottle cap of Example 4 also consists of a single part in which a resin-molded cap body A and a disk-shaped upper lid D are integrally molded, and a sheet material E is stuck on the upper lid D as necessary.

  As in the case of the third embodiment, the cap body A includes an outer cylinder part 51, a ceiling part 52 having a circular raw material inlet 52a, an inner cylinder part 53 depending from the ceiling part 52, and a bottom lid part 54. The bottom lid 54 is molded simultaneously with a resin different from that of the inner cylinder 53 (different material simultaneous molding).

  That is, when the cap body A including the upper cover D is molded, the bottom lid part 54 is poured so that a resin different from the cap body A is poured into the same mold, and the bottom lid part 54 is separably welded to the lower end of the inner cylinder part 53. In the molded product, the welding surface 68 with the lower end of the inner cylindrical portion 53 is a fine uneven surface such as satin so that the bottom lid portion 54 can be easily separated on the surface.

  On the outer peripheral surface of the bottom cover portion 54, as in the case of the first embodiment shown in FIGS. 5 to 10, as the bottom cover opening portion, a plurality of claw portions 66 having spring properties are obliquely upward and as a whole. Projecting radially and integrally.

  According to the bottle cap of Example 4 having such a configuration, as in Example 1, when the cap body A is turned in the sealing direction and the bottom lid part 54 is pushed into the bottle mouth part 50a, All the claw portions 66 become slid and come into sliding contact with the inner peripheral surface of the bottle mouth portion 50a. When the throat portion 50c in the bottle is exceeded, the whole claw portion 66 is restored to the open state and the throat portion 50c The bottle mouth part 50a is sealed by engaging with the lower surface.

  When the cap main body A is rotated in the opening direction in such a sealed state and the inner cylinder part 53 is raised together with the outer cylinder part 51, the bottom lid part 54 has its claw part 66 at the throat part of the bottle mouth part 50a. Since the bottom lid portion 54 is separably welded to the lower end of the inner cylinder portion 53, the bottom lid portion 54 is further separated from the inner cylinder portion 53 that is further raised. It separates at the welding surface 68 at the lower end and falls into the bottle body.

  In addition, the bottom cover part 54 does not completely fall off from the lower end of the inner cylinder part 53 but is separated so as to leave a part, and the bottom cover part 54 is suspended from the lower end of the inner cylinder part 53 at that part. The lower end of 53 may be opened.

  25 and 26 show a modification of the fourth embodiment, in which claw portions 66 that are bottom lid opening portions of the bottom lid portion 54 are radially and integrally formed on the periphery of the lower surface of the bottom lid portion 54.

FIG. 2A is a perspective view and FIG. 2B is a cross-sectional view of the conventional example before assembly. In the same state, (A) is a perspective view and (B) is a cross-sectional view. In the assembled state, (A) is a perspective view and (B) is a cross-sectional view. It is sectional drawing of the state set to the bottle of the prior art example. The bottle cap of Example 1 of this invention is shown, (A) is a perspective view, (B) is sectional drawing. It is the bottom view. FIG. It is sectional drawing of the state in the middle of mounting | wearing with a bottle. It is sectional drawing after the mounting | wearing. It is sectional drawing of the state at the time of the opening. The modification of Example 1 is shown, A) is a perspective view, (B) is sectional drawing. (A) is a perspective view, (B) is sectional drawing in the assembly state of the cap main body and bottom cover of the bottle cap of Example 2 of this invention. The cap main body and a bottom cover are separated perspective views, and the cap main body is shown in cross section. It is sectional drawing of the state in the middle of mounting | wearing with a bottle in the assembly state of FIG. It is sectional drawing after the mounting | wearing. It is sectional drawing of the state at the time of the opening. It is sectional drawing in the bottle mounting state of the modification of Example 2. FIG. It is a perspective view of the modification of a bottom cover. It is sectional drawing of the modification which isolate | separates a cap main body up and down at the time of opening. FIG. 6 is a cross-sectional perspective view of a bottle cap of Example 3. It is sectional drawing of the state in the middle of mounting | wearing the bottle cap of Example 3 with a bottle. It is sectional drawing after the mounting | wearing. 6 is a sectional view of a bottle cap of Example 4. FIG. It is the one part expanded sectional view. 10 is a cross-sectional view of a modified example of Example 4. FIG. It is the one part expanded sectional view.

Explanation of symbols

A Cap body B Bottom cover 50 Bottle 50a Mouth part 50b Screw 50c Throat part 50d Body part 50e Annular convex part 50f Projection part 50g Engaging projection part 51 Outer cylinder part 51a Non-slip knurl 51b Annular step part 51c Screw 52 Ceiling part 52a Raw material inlet 52b Step 52c Hinge 53 Inner cylinder 53a Upper part 53b Middle part 53c Lower part 53d Projection edge 54 Bottom cover part 54a Cut 54b Engagement projection 55 Cut 56 Lower peripheral edge 57 Inner annular projection 57a Teeth Portion 58 pushing portion 59 annular groove 60 annular recess 61 protrusion 62 bottom cover opening portion 63 packing 64 recess 65 tooth portion 66 claw portion 67 step portion 68 welding surface

Claims (15)

An outer tube part formed on the inner periphery with a screw threadedly engaged with a screw on the outer periphery of the bottle mouth part, a ceiling part for sealing the opening of the bottle mouth part, and hanging from the ceiling part into the mouth part of the bottle For a cap body having an inner cylinder part to be inserted and serving as a raw material storage part, a bottom cover part closing the lower end of the inner cylinder part is integrally formed with the inner cylinder part, and these inner cylinder part and bottom cover part A notch is formed between
When the cap body is rotated in the sealing direction and the inner cylinder part is inserted into the mouth part of the bottle, the cap body engages with the throat part when the part of the bottom cover part exceeds the throat part in the bottle. When the inner cylinder part is pulled out from the mouth part of the bottle by rotating in the opening direction, the bottom lid part is restricted from rising at the throat part in the bottle, and at least a part of the bottom lid part is regulated by the cut. A bottle cap characterized in that the raw material in the inner cylinder part is discharged into the bottle by separating from the lower end of the part and opening the lower end of the inner cylinder part. An outer tube part formed on the inner periphery with a screw threadedly engaged with a screw on the outer periphery of the bottle mouth part, a ceiling part for sealing the opening of the bottle mouth part, and hanging from the ceiling part into the mouth part of the bottle Inserted into a cap body having an inner cylinder part serving as a raw material storage part, a bottom lid part that closes the lower end of the inner cylinder part is weld-molded so as to be separable with a resin different from the inner cylinder part,
When the cap body is rotated in the sealing direction and the inner cylinder part is inserted into the mouth part of the bottle, the cap body engages with the throat part when the part of the bottom cover part exceeds the throat part in the bottle. When the inner cylinder part is pulled out from the mouth of the bottle by rotating in the opening direction, the bottom lid part is restricted from rising at the throat part in the bottle, and at least a part of the bottom lid part is the lower end of the inner cylinder part A bottle cap characterized in that the raw material in the inner cylinder part is released into the bottle when the lower end of the inner cylinder part is opened after being separated from the bottle. A bottom lid opening portion that can be elastically deformed protrudes from the bottom lid portion,
When the cap body is rotated in the sealing direction and the inner cylinder part is inserted into the mouth part of the bottle, the bottom cover opening part is closed by the mouth part of the bottle and opened beyond the throat part in the bottle. When the cap body is rotated in the opening direction and the inner cylinder portion is pulled out from the mouth of the bottle, the opened bottom lid opening portion is The bottle cap according to claim 1 or 2, wherein at least a part of the bottom lid part is separated from a lower end of the inner cylinder part by the notch by being controlled by the throat part.   2. An engagement protrusion that engages with each other and regulates the rise of the bottom lid when the cap body is opened is formed on the throat in the bottle and the outer periphery of the bottom lid. 2. The bottle cap according to 2.   The bottle cap according to claim 1, 2, 3, or 4, wherein a raw material inlet for the inner cylinder portion is formed in a ceiling portion of the cap body, and the raw material inlet is sealed with an upper lid.   The bottle cap according to claim 5, wherein the upper lid is integrally formed with the cap main body continuously with the ceiling portion of the cap main body by an elastically deformable hinge portion.   The bottle cap according to claim 5 or 6, wherein the upper surface of the upper lid is covered with an affixed sheet material together with the upper surface of the surrounding ceiling portion. It consists of a cap body and a bottom lid,
The cap body includes an outer tube portion formed on the inner periphery with a screw that engages with an outer peripheral screw of the bottle mouth portion, a ceiling portion that seals the opening of the bottle mouth portion, and a bottle that hangs down from the ceiling portion. And has an inner cylinder part that becomes a raw material storage part,
In order to detachably seal the lower end opening of the inner cylinder part, the bottom cover is integrally formed with an annular recess that can press-fit the lower end part of the inner cylinder part,
When the cap body is rotated in the sealing direction and the inner cylinder portion is inserted into the mouth portion of the bottle, the cap portion is engaged with the throat portion when a part of the bottom lid exceeds the throat portion in the bottle. When rotating in the opening direction and pulling out the inner cylinder part from the mouth part of the bottle, the bottom lid is restricted from rising at the throat part in the bottle and separated from the lower end of the inner cylinder part, and the lower end of the inner cylinder part The bottle cap is characterized in that the material in the inner cylinder part is released into the bottle by opening. The bottom lid is provided with a bottom lid opening that can be elastically deformed,
When the cap body is rotated in the sealing direction and the inner cylinder part is inserted into the mouth part of the bottle, the bottom cover opening part is closed by the mouth part of the bottle and opened beyond the throat part in the bottle. When the cap body is rotated in the opening direction and the inner cylinder portion is pulled out from the mouth of the bottle, the opened bottom lid opening portion is The bottle cap according to claim 8, wherein the bottom lid is separated from the lower end of the inner cylindrical portion by being restricted from rising at the throat.   The bottle cap according to claim 3 or 9, wherein the bottom lid opening portion is formed to project in an annular shape, and is opened and closed by changing the annular outer diameter by elastic deformation.   11. The bottle cap according to claim 10, wherein a plurality of tooth portions whose projecting height decreases toward the lower end are formed on the outer peripheral surface of the bottom lid opening portion.   The bottle cap according to claim 3 or 9, wherein the bottom lid opening portion is composed of a plurality of claw portions that are divided and formed so as to open and close by elastic deformation.   The bottle cap according to claim 3 or 9, wherein a protrusion that engages with the bottom lid opening portion is formed on the throat portion in the bottle.   The bottle cap according to claim 8, wherein a packing made of a material softer than the annular recess is integrally provided on the inner surface of the annular recess of the bottom lid by simultaneous molding.   The bottle cap according to claim 14, wherein a part of the packing is embedded in the annular recess with a part thereof protruding from the inner surface of the annular recess.

Images