JP5184191B2 - Bottle cap - Google Patents

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 releases the raw material into a bottle by dropping the bottom cover of the raw material container in accordance with the opening operation.

The present inventor has already proposed such bottle caps disclosed in Patent Document 1 (Japanese Patent Laid-Open No. 2004-106888) and Patent Document 2 (Japanese Patent Laid-Open No. 2005-88997).
The bottle caps described in these are: a parent cap having an outer cylinder to be inserted into the mouth of the bottle; a child cap having an inner cylinder to be inserted into the outer cylinder and serving as a raw material storage; and a lower end of the inner cylinder It consists of a bottom lid that seals the opening, covers the cap body of the parent cap over the mouth of the bottle and tightens it, and by screwing the child cap onto the outer cylinder of the parent cap, In addition, the bottle mouth can be sealed, and by rotating the child cap in the opening direction with respect to the outer cylinder of the parent cap, the bottom lid is removed from the inner cylinder by the lower end of the outer cylinder of the parent cap. The raw material is released into the bottle.

  In such a bottle cap, the assembly of the parent cap, the child cap and the bottom lid is performed by inserting the inner cylinder of the child cap into the outer cylinder of the parent cap, screwing the child cap into the outer cylinder of the parent cap, The child cap is screwed into the parent cap until the lower end opening of the outer cylinder protrudes from the lower end opening of the outer cylinder, that is, after the parent cap and the child cap are completely assembled, the raw material is placed in the inner cylinder which is the raw material storage section. (Powder and granules) are filled, and then the lower end opening of the inner cylinder is sealed with a bottom lid. Thereafter, the cap body of the parent cap is screwed into the bottle mouth, the inner cylinder is inserted into the mouth of the bottle together with a part of the outer cylinder, and the bottle cap is attached to the bottle mouth.

  However, when filling the raw material into the inner cylinder, the raw material not only adheres to the outer surface of the inner cylinder, but also adheres to the outer surface of the outer cylinder, and further penetrates between the inner cylinder and the outer cylinder. Although the bottle cap was cleaned after filling, there was a problem that the cleaning could not be performed sufficiently.

  In FIGS. 4 to 6 of Patent Document 1, the bottom cover is connected to the outer cylinder by a flexible connecting piece, and the bottom cover is dropped from the inner cylinder by the lower end of the outer cylinder of the parent cap. It is shown suspended from the cylinder and separated from the parent cap so as not to sink into the bottle.

However, in the structure in which the bottom cover is connected to the outer cylinder with a flexible connecting piece, even if it is relatively easy to integrally mold the bottom cover and the connecting piece, the outer cylinder (parent cap) It is very difficult to mold the resin integrally. On the other hand, it is conceivable that the bottom cover and the connecting piece are integrally molded with resin, and the connecting piece is welded to the outer cylinder, but the manufacturing cost increases due to an increase in the welding process.
JP 2004-106888 A JP 2005-88997 A

  The first problem of the present invention is that the bottom lid after separating from the inner cylinder of the child cap and opening the lower end opening thereof can be held in the outer cylinder of the parent cap so as not to fall into the bottle. In addition, it is an object of the present invention to provide a bottle cap that can be easily held and has a simple and easily manufactured holding structure.

  The second problem of the present invention is that it is easy to assemble the three parts of the parent cap, the child cap, and the bottom lid even if the bottom lid separated from the inner cylinder of the child cap is held in the outer cylinder so as not to fall. The mechanism of the automatic assembly device can be simplified, the equipment cost and running cost can be reduced, the assembly time can be shortened, and the ease of cleaning, elimination of uneven cleaning, and simplification of the cleaning device can be achieved. Is to make it.

  In order to achieve the first and second problems, the present invention according to claim 1 has an outer cylinder 6 that is inserted into the mouth 50a of the bottle 50 and fixed to the mouth 50a. A parent cap 1 that is inserted into the outer cylinder 6 and an inner cylinder 9 that serves as a raw material storage portion, and a child cap 2 that opens and closes the upper end opening of the outer cylinder 6 together with the mouth portion 50a of the bottle 50, It consists of a bottom lid 3 that seals the lower end opening of the cylinder 9. By rotating the child cap 2 in the opening direction, the bottom lid 3 is separated from the inner cylinder 9, and the raw material 12 in the inner cylinder 9 is placed in the bottle 50. In the bottle cap to be discharged, the outer cylinder 6 and the bottom lid 3 are provided with the following portions.

  That is, a bottom lid stopper 6g extending downward is integrally projected at the lower end of the outer cylinder 6, whereas a claw portion 3i extending in the circumferential direction is integrally projected from the bottom lid 3. ing. When the claw portion 3i is rotated in the opening direction of the child cap 2, by engaging with the bottom cap stopper 6g so as to sandwich the bottom cap 3, the bottom cap 3 is prevented from rotating and separated from the inner cylinder 9, The bottom lid 3 separated from the inner cylinder 6 is swingably suspended on the bottom lid stopper 6g.

  In the invention according to claim 2, which is a preferred embodiment, the claw portion 3i extends in the circumferential direction while forming a gap 3j for receiving the bottom lid stopper 6g between the outer circumferential surface of the bottom lid 3 and is elastic. And a retaining protrusion 3n that prevents the peripheral bottom stopper 6g from being removed in the circumferential direction by crossing the received bottom lid stopper 6g in the circumferential direction. 6g forms the fall prevention protrusion 6i which controls the downward movement of the nail | claw part 3i and prevents the bottom cover 3 from falling.

Similarly, in the invention according to claim 3, the lower part of the outer peripheral surface of the bottom cover 3, that is, the lower part of the part projecting the claw part 3 i is the inclined surface 3 l that tapers the bottom cover 3. .
Similarly, in the invention according to claim 4, a recess 3q for securing a gap 3j with the claw portion 3i is formed in a portion where the claw portion 3i on the outer peripheral surface of the bottom lid 3 extends.
In the invention which concerns on Claim 5, it is an upper end of the bottom cover 3, Comprising: A clearance gap is provided between the bottom cover 3 isolate | separated from the inner cylinder 9, and the opening edge of the outer cylinder 6 on the opposite side to the protrusion part of a nail | claw part. Spacer protrusions 3p to be formed are integrally projected.

According to the first aspect of the present invention, when the child cap is rotated in the opening direction to open the cap, the bottom lid sealing the lower end opening also rotates integrally with the child cap. The claw portion that extends in the circumferential direction engages with the bottom cap stopper protruding from the lower end of the outer cylinder of the parent cap so that the child cap rises with respect to the outer cylinder while rotating further. Although the bottom lid is prevented from rotating by the bottom lid stopper, the bottom lid is separated from the inner cylinder because the rise is restricted by the lower end edge of the outer cylinder. The separated bottom lid is swingably suspended from the bottom lid stopper by a claw projecting therefrom, and is prevented from falling in the bottle while the lower end opening of the inner cylinder is open.
Therefore, there are the following effects.
(1) In addition to preventing accidental ingestion of the bottom lid, if the parent cap is removed from the bottle when disposing, the bottom lid does not remain in the bottle, so that the bottom lid does not hinder bottle regeneration processing.
(2) A bottom lid stopper is projected from the lower end of the outer cylinder, while a claw is projected from the bottom lid, and the bottom lid is rotated with the child cap, and the bottom lid stopper is sandwiched between the claws. By doing so, the bottom lid is separated from the inner cylinder and is also swingably suspended by the bottom lid stopper, so that the bottom lid can be easily separated from the inner cylinder and prevented from falling from the outer cylinder. .
(3) Even if the bottom cover separated from the inner cylinder is held in the outer cylinder so that it does not fall, the assembly of the parent cap, the child cap and the bottom lid is easy, and the mechanism of the automatic assembly apparatus can be simplified. Equipment costs and running costs can be reduced, assembly time can be shortened, cleaning can be easily eliminated, cleaning unevenness can be reduced, and a cleaning device can be simplified.

  According to the second aspect of the present invention, the claw portion extends in the circumferential direction while forming a gap with the outer peripheral surface of the bottom lid and has elasticity, and when the bottom lid rotates together with the inner cylinder, When the bottom lid stopper of the cylinder enters and the retaining projection of the claw forcibly exceeds the bottom lid stopper of the outer cylinder, the claw is prevented from coming off from the bottom lid stopper in the circumferential direction. In this state, the claw portion is prevented from dropping by the drop prevention protrusion of the bottom lid stopper, and the bottom lid is suspended by the bottom lid stopper, so that the bottom lid rotates with the child cap with the opening operation. Only the bottom lid can be separated from the inner cylinder and the lower end opening can be opened, and the separated bottom lid can be held by the outer cylinder, so that the bottom lid can be separated from the inner cylinder and dropped from the outer cylinder. The prevention structure is simple and easy to mold and assemble.

  According to the invention of claim 3, the outer peripheral surface of the bottom lid is an inclined surface with the bottom lid tapered from the portion where the claw portion protrudes. A large opening angle of the bottom lid that opens the lower end opening can be secured.

  According to the fourth aspect of the present invention, since the concave portion for securing a gap with the claw portion is formed in the portion where the claw portion of the outer peripheral surface of the bottom lid extends, the claw portion having the above function Even if it protrudes from the bottom lid, the outer peripheral size of the bottom lid can be suppressed.

  According to the fifth aspect of the present invention, even if the bottom cover after the inner cylinder is opened approaches the lower end opening of the outer cylinder as the liquid in the bottle is dispensed, the spacer protrusion protruding from the upper end of the bottom cover is provided. Since the part forms a gap between the lower end opening edge of the outer cylinder, even if the bottom lid is swingably suspended by the bottom lid stopper, the liquid can be poured out from the bottle with the bottom lid. There is no hindrance.

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

  The bottle cap of the present embodiment is composed of a parent cap 1, a child cap 2, and a bottom lid 3, each of which is resin-molded, as shown in FIG.

  The parent cap 1 is made of polyethylene terephthalate in the same manner as the polyethylene terephthalate PET bottle 50 (hereinafter referred to as a bottle) shown by a chain line in FIG. 2, and the upper and lower ends are opened in the cap body portion 5 that covers the mouth portion 50a. The outer cylinder 6 is provided integrally. As shown in FIGS. 4 and 5, the outer cylinder 6 integrally penetrates the top portion 5a of the cap body portion 5 in the vertical direction, and the upper portion protruding upward from the top portion 5a has a mouth portion 6a whose upper end opens. The lower part protruding downward from the top part 5a is a hanging cylinder part 6b that hangs downward from the lower end and opens the lower end while forming a gap 5c with the body part 5b of the cap body part 5. It has become.

  A plurality of vertically long slits 6c extending from the middle to the lower end are formed in the drooping cylinder portion 6b, and the drooping cylinder portion 6b is gradually narrowed from the upper end portion of the slit 6c toward the lower end. The inner diameter from the middle is smaller than the outer diameter of the bottom lid 3, and a vertically long ridge 6j is formed on the entire outer peripheral surface of this portion for reinforcement. On the outer peripheral surface of the hanging cylinder portion 6b above the slit 6c, an annular sealing projection 6d is formed. Further, an annular tooth portion 5d having a sharp tip edge (lower edge) is integrally formed on the lower surface of the top portion 5a so as to protrude in the gap 5c.

  A male screw 6e is formed on the outer peripheral surface of the mouth portion 6a of the outer cylinder 6, and a child cap locking collar portion 6f is integrally provided between the terminal end and the top portion 5a. On the other hand, a plate-like bottom cover stopper 6g is integrally formed so as to protrude downward at one position on the lower end edge of the drooping cylinder part 6b of the outer cylinder 6 (periphery of the lower end opening 6h of the drooping cylinder part 6b). At the lower end of the bottom lid stopper 6g, drop prevention protrusions 6i that swell on both side surfaces are formed.

  The inner peripheral surface of the body portion 5b of the cap main body 5 is integrally formed with an annular retaining protrusion 5e that goes around the inner peripheral surface at the lower end thereof. On the upper side, an annular tightening projection 5f that also goes around the inner peripheral surface is formed integrally. Further, on the outer peripheral surface of the body part 5b of the cap body part 5, a reinforcing collar part 5g for increasing the thickness of the body part 5b outward is integrally formed with a lower end part opposite to the retaining protrusion part 5e. The knurl 5h is formed on the outer peripheral surface above the upper surface.

  The child cap 2 integrally projects an inner cylinder 9 serving as a raw material and pressure gas filling part (capsule) downward from the bottom surface of the top part 8a of the cap main body part 8 in the same manner as in the past. At a position close to the outer periphery, a thin short sealing ring 10 is integrally projected downward from the top 8a. The inner cylinder 9 protrudes much longer than that while forming a gap 8 c between the inner body 9 and the body 8 b of the cap body 8, and only the projecting lower end is opened.

  The inner cylinder 9 in which the lower end opening 9 c is formed in this way has an outer diameter smaller than the inner diameter of the outer cylinder 6 of the parent cap 1 except for the lower end portion, and is inserted with a gap 7 formed between the inner cylinder 9 and the outer cylinder 6. The length is slightly longer than the outer cylinder 6. The lower end of the inner cylinder 9 is a sealing protruding edge 9a that bulges outward, and a shallow sealing annular groove 9b is formed on the entire circumference of the upper outer peripheral surface following the protruding edge 9a.

  On the inner peripheral surface of the body portion 8b of the cap body portion 8, a female screw 8d that is screwed with the male screw 6e of the mouth portion 6a of the outer cylinder 6 is formed. On the other hand, an anti-slip knurl 8e is provided on the outer peripheral surface of the body portion 8b when the finger is put on the body 8b.

  Also, on the lower side of the body portion 8b of the cap body portion 8, a locking separation ring 11 is slightly connected to the body portion 8b by a bridge 8f which is a small connecting portion, so that the cap body portion 8 is integrated. It is resin molded. The cap body 8 and the locking separation ring 11 are separated when the bridge 8f is cut. On the inner peripheral surface of the locking separation ring 11, an annular separation projection 11 a that makes a round is integrally formed.

  The bottom cover 3 is integrally formed of an olefin-based resin, for example, transparent polyethylene terephthalate, and as shown in detail in FIGS. 6 to 8, the outer peripheral wall 3 a that rises at the peripheral edge of the upper surface, and the inner wall rises higher than this. An inner peripheral wall 3b is formed so as to project integrally, and an annular groove 3c is formed between the inner peripheral wall 3b and the outer peripheral wall 3a. Then, as shown in FIGS. 2 and 5, a small sealing projection 3d is formed in an annular shape on the bottom surface of the annular groove 3c, and an annular small seal that goes around the inner peripheral surface of the outer peripheral wall 3a. Grooves 3e and an annular small sealing protrusion 3k that makes a round are formed.

  Further, a reinforcing rib 3f having a cross shape is formed on the inner surface of the inner peripheral wall 3b on the upper surface of the bottom lid 3, and an annular reinforcing convex portion 3g is formed in the circular concave portion on the lower surface, and is radially formed on the outer periphery thereof. A reinforcing rib 3h is formed.

  In addition, the claw portion 3i forms a gap 3j between the outer peripheral surface of the bottom lid 3 and the outer lid of the bottom lid 3 so that the bottom lid stopper 6g of the outer cylinder 6 can be received. While being curved along the outer peripheral surface of the bottom lid 3, it is integrally projected so as to extend in the circumferential direction and have elasticity. The tip of the claw portion 3i has an arrowhead shape.

  On the outer peripheral surface of the bottom lid 3, a concave portion 3q is formed in a portion where the claw portion 3i extends in order to ensure a gap 3j with the claw portion 3i. Further, the lower corner portion of the outer peripheral surface of the bottom cover 3 is an inclined surface whose entire periphery is tapered to the bottom cover 3, but the inclined surface 3l of the portion where the recess 3q is formed is more than the other portion. The tilt angle is also large. In the middle of the concave portion 3q and the middle of the claw portion 3i, retaining projections 3m and 3n that narrow the gap 3j only partially are formed to face each other.

  Further, on the upper edge of the outer peripheral wall 3a of the bottom lid 3, a plate-like spacer protrusion 3p having elasticity is integrally projected upward on the side opposite to the claw 3i.

  On the other hand, on the outer peripheral surface of the mouth part 50a of the bottle 50, a locking collar part 50d is integrally formed between the male screw 50b and the reinforcing collar part 50c. The upper surface of the locking collar portion 50d is a slope inclined with an arc, but the lower surface is a horizontal plane. Such a structure of the bottle mouth portion 50a is common to ordinary PET bottles regardless of the size of the bottle.

  In the bottle cap of this embodiment having such a configuration, the three parts of the parent cap 1, the child cap 2 and the bottom lid 3 are assembled as follows.

  As shown in FIG. 2, when the inner cylinder 9 of the child cap 2 is inserted into the outer cylinder 6 of the parent cap 1 and the female screw 8d is screwed into the male screw 6e of the parent cap 1 while turning the child cap 2, The separation protrusion 11 a on the inner peripheral surface of the lock separation ring 11 is forcibly positioned in the immediate vicinity of the child cap lock collar 6 f of the parent cap 1, and the child cap 2 is attached to the parent cap 1. It is locked against. Further, the top portion 8a of the child cap 2 presses against the upper peripheral edge of the mouth portion 6a of the outer cylinder 6, and the sealing ring 10 is press-fitted into the mouth portion 6a of the outer tube 6 so that the corner of the body portion 8b of the child cap 2 is pressed. The mouth portion 6a of the outer cylinder 6 is sandwiched from inside and outside by the portion, and the mouth portion 6a of the outer cylinder 6 is sealed with high sealing properties. On the opposite side, the tip end portion of the inner cylinder 9 having the sealing annular groove 9 b protrudes from the outer cylinder 6, and the tip inner peripheral edge of the hanging cylinder portion 6 b of the outer cylinder 6 is the annular annular groove 9 b for sealing of the inner cylinder 9. Is pressed against the outer peripheral surface of the inner cylinder 9 at a close position, and the space between the outer peripheral surface of the inner cylinder 9 and the inner peripheral surface of the outer cylinder 6 is sealed at this position.

  The parent cap 1 and the child cap 2 thus made are turned upside down, and the raw material 12 is put in the inner cylinder 9 of the child cap 2 in a pressure gas atmosphere such as nitrogen gas. The lower end portion of the inner cylinder 9 is fitted into the annular groove 3 c of the bottom lid 3 so as to be pushed into the inner cylinder 9. As a result, the lower end portion of the inner cylinder 9 is press-fitted into the annular groove 3c. Inside the annular groove 3c, the protruding edge 9a of the inner cylinder 9 is fitted into the sealing groove 3e, and The sealing projection 3k is fitted into the sealing ring groove 9b of the cylinder 9, and the lower end of the inner cylinder 9 is pressed against the sealing projection 3d. The lower end opening of the inner cylinder 9 and the annular recess 3c of the bottom cover 3 are provided. Is triple sealed in the annular recess 3c.

  As described above, after sealing the lower end opening of the inner cylinder 9 filled with the raw material 12 with the bottom cover 3, the outer surface is cleaned. In particular, the bottom cover 3 itself and its periphery are so small that the cleaning liquid enters. Since there is no gap, the raw material does not remain on the outer surface.

  When the washed bottle cap of the present embodiment is attached to the mouth portion 50a of the bottle 50, the outer cylinder 6 is inserted into the bottle mouth portion 50a, and the parent cap 1 is turned in the closing direction so that the cap body portion 5 The annular tightening protrusion 5f is engaged with the male screw 50b of the bottle mouth portion 50a and screwed, and the retaining protrusion 5e of the cap body portion 5 of the parent cap 1 is locked with the locking collar portion 50d on the bottle mouth portion 50a side. Until the annular tooth portion 5d of the cap body portion 5 bites into the opening edge of the bottle mouth portion 50a, the parent cap 1 is further rotated in the closing direction to seal the bottle mouth portion 50a. In this state, the sealing projection 6d on the outer peripheral surface of the outer cylinder 6 is also in pressure contact with the inner peripheral surface of the bottle mouth portion 50a, so that the parent cap 1 and the bottle mouth portion 50a are in contact with the pressure contact and the annular tooth portion 5d. And double sealed.

  To open the bottle cap, the child cap 2 is rotated in the opening direction with respect to the parent cap 1. Then, the child cap 2 is screwed upward with respect to the opening 6a of the outer cylinder 6 of the parent cap 1, but the locking separation ring 11 of the child cap 2 is for child cap locking on the parent cap 1 side. Since the rise is restricted by the flange portion 6f, as shown in FIG. 3, the bridge 8f, which is the connecting portion with the cap body portion 8, is cut and the locking separation ring 11 is separated.

  When the child cap 2 is turned, the inner cylinder 9 rises while rotating with the bottom lid 3. When the bottom lid 3 rotates, the claw portion 3i projecting from the bottom lid 3 approaches the bottom lid stopper 6g projecting from the lower end edge of the outer cylinder 6, as shown by the arrow in FIG. The bottom lid stopper 6g enters the gap 3j between the claw 3i and the outer peripheral surface of the bottom lid 3. When the bottom lid stopper 6g reaches between the retaining projection 3n of the claw portion 3i and the retaining projection 3m on the outer peripheral surface of the bottom lid 3, the projection is opened while pushing it open by the elasticity of the claw 3i. Forcibly passes over the portions 3m and 3n and enters further into the gap 3j. When the bottom lid stopper 6g reaches the base end of the claw 3i as shown by hatching in FIG. 9, the bottom lid 3 is prevented from rotating by the bottom lid stopper 6g, and the bottom edge of the outer cylinder 6 While the rise is restricted, the inner cylinder 9 rises while rotating further, so that the bottom cover 3 is detached from the inner cylinder 9 and separated.

  When this is separated, the lower end opening of the inner cylinder 9 is opened, and the raw material 12 in the inner cylinder 9 is jetted into the bottle 50 together with the pressure gas. However, the claw portion 3i of the bottom lid 3 is engaged with the bottom lid stopper 6g of the outer cylinder 6 so as to sandwich it, and the downward movement of the claw portion 3i is applied to the drop prevention projection 6i at the lower end of the bottom lid stopper 6g. 3 and the retaining protrusions 3m and 3n prevent the bottom cover stopper 6g from being pulled out in the circumferential direction, so that the bottom cover 3 swings against the bottom cover stopper 6g as shown in FIG. Suspended freely. At this time, the lower side corner portion of the outer peripheral surface of the bottom cover 3 has an inclination angle larger than that of the other portion of the inclined surface 3l where the claw portion 3i exists. Even if it is returned to this position, it is sufficiently separated from the lower end opening 9c to maintain the open state.

  After the child cap 2 is extracted, even if the bottom lid 3 hits the outer cylinder 6 due to the flow of the liquid in the bottle 50, the spacer protrusion 3p is formed on the upper edge of the outer peripheral wall 3a of the bottom lid 3. Since the spacer projection 3p can form a gap between the lower end edge of the outer cylinder 6 and the outer cylinder 6 has a plurality of slits 6c, It will not hinder liquid dispensing.

  After the child cap 2 is removed from the parent cap 1, when the parent cap 1 is to be removed from the bottle mouth portion 50a and the parent cap 1 is rotated in the loosening direction with respect to the male screw 50b of the bottle mouth portion 50a, the cap of the parent cap 1 is obtained. The annular tightening protrusion 5f of the main body 5 exceeds the upper end of the male screw 50b of the bottle mouth part 50a, and the parent cap 1 is idled with respect to the bottle mouth part 50a. However, even in such a state, the retaining protrusion 5e of the cap body 5 is separated from the tightening protrusion 5f by a distance L, so that the locking collar 50d on the bottle mouth portion 50a side is separated. Even if the main cap 1 is left at the lower side and the parent cap 1 is forcibly pulled out from the bottle mouth portion 50a, the retaining cap 5e cannot get over the locking collar portion 50d, so that the parent cap 1 is prevented from being pulled out. Is done. As long as the parent cap 1 remains in the bottle mouth portion 50a, the bottom lid 3 cannot be pulled out of the bottle 50.

  Although the parent cap 1 and the bottom lid 3 remain in the bottle 50, they are made of the same polyethylene terephthalate as the bottle 50, so that the bottle 50 and the plastic bottle can be recycled.

It is a whole perspective view of the bottle cap of the Example of this invention. It is whole sectional drawing of the state which mounted | wore the bottle cap of the Example of this invention. In the bottle cap of the Example of this invention, it is whole sectional drawing which shows the state which the bottom cover opened. It is the perspective view which looked at the parent cap in the bottle cap of the Example of this invention from the downward side. In the bottle cap of the Example of this invention, it is sectional drawing which shows the state which extracted the child cap from the parent cap. It is a perspective view of the bottom cover in the bottle cap of the Example of this invention. In the bottle cap of the Example of this invention, it is the perspective view seen from the downward side of the bottom cover which showed the bottom cover stopper part of the outer cylinder with the dashed line. It is a top view of the bottom cover in the bottle cap of the Example of this invention. In the bottle cap of the Example of this invention, it is a bottom view which shows that a relationship with the bottom cover stopper part of an outer cylinder changes when a bottom cover rotates.

Explanation of symbols

1 parent cap 2 child cap 3 bottom lid 3a outer peripheral wall 3b inner peripheral wall 3c annular groove 3d sealing projection 3e sealing groove 3f reinforcing rib 3g reinforcing projection 3h reinforcing rib 3i claw portion 3j gap 3k sealing projection 3l slope Surface 3m, 3n Retaining protrusion 3p Spacer protrusion 3q Recess 5 Cap body 5a Top 5b Body 5c Gap 5d Ring tooth 5e Retaining protrusion 5f Tightening protrusion 5g Reinforcement flange 5h Knurl 6 Outer cylinder 6a Mouth part 6b Drooping cylinder part 6d Seal projection 6e Male screw 6f Child cap lock collar 6g Bottom cover stopper 6h Lower end opening 6i Drop prevention projection 6j Projection 7 Gap 8 Cap body 8a Top 8b Body 8c Gap 8d Female thread 8e Knurl 8f Bridge 9 Inner cylinder 9a Projecting edge 9b Sealing annular groove 9c Lower end opening 10 Sealing ring 11 Locking separation ring 11a Separation protrusion Part 12 Raw material 50 Bottle 50a Mouth part 50b Male thread 50c Reinforcement collar part 50d Lock collar part

Claims (5)

  An outer cylinder, a parent cap that is inserted into the mouth of the bottle and fixed to the mouth, and an inner cylinder that is inserted into the outer cylinder and serves as a raw material storage section. It consists of a child cap that opens and closes the upper end opening together with the mouth of the bottle and a bottom lid that seals the lower end opening of the inner cylinder. By rotating the child cap in the opening direction, the bottom lid is separated from the inner cylinder, In the bottle cap in which the raw material in the cylinder is discharged into the bottle, a bottom cover stopper portion extending downward is integrally projected at the lower end of the outer cylinder, whereas the bottom cover A claw portion extending in a direction is integrally projected, and this claw portion prevents the bottom lid from rotating by engaging with the bottom lid stopper when sandwiched by rotating the child cap in the opening direction. And separating the bottom lid separated from the inner cylinder with the bottom lid Bottle cap according to claim swingably be suspended in part.   The claw portion extends in the circumferential direction while forming a gap for receiving the bottom lid stopper portion with the outer peripheral surface of the bottom lid, and has elasticity, and the received bottom lid stopper portion is circumferentially provided in a part thereof. The bottom cover stopper prevents the fall of the bottom cover by restricting the downward movement of the claw part, while forming a retaining protrusion that prevents it from being pulled out in the circumferential direction. The bottle cap according to claim 1, wherein a protrusion is formed.   3. The bottle cap according to claim 1, wherein an outer peripheral surface of the bottom lid is an inclined surface with a bottom portion tapering at a lower portion from a portion where the claw portion is protruded.   The bottle cap according to claim 1, 2 or 3, wherein a concave portion for securing a gap with the claw portion is formed in a portion where the claw portion of the outer peripheral surface of the bottom lid extends. A spacer projection that forms a gap between the bottom lid separated from the inner cylinder and the opening edge of the outer cylinder is integrally projected on the upper end of the bottom lid, on the opposite side of the claw projection. The bottle cap according to claim 1, 2, 3, or 4.

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