JP4045095B2 - cap - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cap, and more particularly to a cap for sealing a bottle such as a milk bottle.
[0002]
[Prior art]
Conventionally, for example, a paper cap has been fitted into the bottle mouth in order to seal a milk bottle or the like. In such a cap, the contents may leak from the bottle mouth due to an increase in pressure in the bottle due to a temperature change. Therefore, a cap made of a synthetic resin or the like and capable of firmly sealing the bottle mouth has been considered.
[0003]
[Problems to be solved by the invention]
However, even when a synthetic resin cap is used, it may not be sealed due to the shape of the bottle mouth. Further, even when the bottle mouth can be tightly sealed, it is preferable that it is easily removed when the cap is removed from the bottle.
[0004]
Therefore, a main object of the present invention is to provide a cap that can be applied to a plurality of bottle openings and can prevent the contents from leaking due to a pressure change in the bottle due to a temperature change or the like. .
Another object of the present invention is to provide a cap that can be easily removed from the bottle even if the bottle mouth is tightly sealed.
[0005]
[Means for Solving the Problems]
  The present invention provides a plate-like top wall, a cylindrical outer wall formed to extend in a direction intersecting the surface of the top wall at the outer periphery of the top wall, and an inner surface of the outer wall.SuddenAt least one formed to extend around the inner surface of the outer peripheral wallAnnularA protrusion, a cylindrical inner peripheral wall extending in the same direction as the outer peripheral wall from the top wall on the inner peripheral side of the outer peripheral wall, and a protrusion projecting from the outer surface of the inner peripheral wall, and continuously surrounding the outer surface of the inner peripheral wallFormed asWith protrusionsThe cylindrical inner peripheral wall extending in the same direction as the outer peripheral wall from the top wall on the inner peripheral side of the inner peripheral wall and the outer surface of the other inner peripheral wall are formed so as to protrude continuously from the outer surface of the other inner peripheral wall. Protrusions formed asIncluding a cap.
  In such a capAnotherIn order to thicken the connecting portion between the inner peripheral wall and the top wall, a connecting portion between another inner peripheral wall and the top wall may be formed in a curved shape.
  Further, a protrusion protruding from the top wall in the same direction as the outer peripheral wall may be formed between the outer peripheral wall and the inner peripheral wall. In this case, the protrusion protruding from the top wall faces the outer peripheral side of the top wall. It is preferable to be formed so as to protrude.
  AlsoAnotherIt is preferable that a groove is formed in the top wall along the inside of the inner peripheral wall.
  Furthermore, it is preferable to make the thickness of the top wall inside the groove thinner than the thickness of the top wall outside the groove.
  Moreover, the protrusion part formed in an outer peripheral wall is comprised by the protrusion piece formed in multiple numbers at intervals so that the inner surface of an outer peripheral wall might go around.
  Further, a tension member for pulling to tear the score portion may be formed, including a thin score portion formed linearly at two locations on the outer peripheral wall.
  At this time, the tension member is formed, for example, in a band shape that connects the outer surfaces of the outer peripheral wall in the vicinity of the two score portions.
  In this case, the tension member is formed so as to extend from the connecting portion with the outer peripheral wall to one side of the score portion along the outer peripheral wall, and after reversing, the tensile member is substantially half-circulated along the outer surface of the outer peripheral wall on the other side of the score portion. It is preferable that they are arranged as described above.
  Furthermore, a recessed part can be formed in the edge part of a score part.
  Moreover, you may make it connect one place or several places of the intermediate part of a tension member with the outer surface of an outer peripheral wall.
  Furthermore, a flange can be formed on the opposite side of the tension member from the outer peripheral wall toward the outside.
  The tension member may be formed adjacent to the two score portions between the two score portions. In this case, by pulling the tension member, the score portion is torn and the tension member is separated from the outer peripheral wall. The
  When forming such a tension member, a flange can be formed from the outer peripheral wall toward the outside in the vicinity of the tension member.
[0006]
  The cap is fixed to the bottle by pressing the protrusion formed on the outer peripheral wall against the outer surface of the bottle. At this time, the protrusion formed on the inner peripheral wall is pressed against the inner surface of the bottle, whereby the bottle is sealed and leakage of the contents of the bottle can be prevented. In this way, the protrusions on the outer peripheral wall and the protrusions on the inner peripheral wall are pressed against the outer and inner surfaces of the bottle, so that the cap can be firmly fixed regardless of the shape of the bottle.
  Furthermore, if another inner peripheral wall is provided inside the inner peripheral wall and a protrusion is formed on the other inner peripheral wall, the cap can be more firmly fixed to a specific-shaped bottle.
  By thickening the connecting part between the inner wall and the top wall in a curved shape, even if the top wall is bent due to a pressure difference between the inside and outside of the bottle, the other inner wall is less likely to fall down, resulting in a sealing effect. Can be secured.
  Further, by forming a projection on the top wall and projecting the projection toward the outer peripheral side of the top wall, the projection is pressed against the end surface of the bottle, and a sealing effect can be obtained. At this time, when the pressure inside the bottle is reduced by forming the protrusion so as to protrude toward the outer peripheral side of the top wall, the protrusion is pressed against the end face of the bottle with the protrusion facing toward the outer peripheral side. It is done. Thereby, the contact area to the end surface of the bottle of the protrusion is increased, and the sealing effect can be increased..
  AnotherBy forming a groove in the top wall along the inner peripheral wall of the bottle, the top wall inside the groove becomes easy to move, and when there is a difference in the pressure inside and outside the bottle, the pressure difference due to the movement of the top wall Can be absorbed.
  Furthermore, by making the top wall inside the groove thin, the top wall can be easily bent, and the effect of absorbing the pressure difference between the inside and outside of the bottle can be enhanced.
  In addition, the protrusions formed on the outer peripheral wall are not formed continuously on the inner surface of the outer peripheral wall, and a plurality of protrusion pieces make a round, so that the protrusion pieces are formed when the cap is put on the bottle. The force applied to the outer peripheral wall is dispersed by the extension of the outer peripheral wall of the portion that is not.
  By forming a score portion on the outer peripheral wall and forming a tension member for tearing the score portion, the score portion is torn by pulling the tension member. Thereby, the engaging force to the bottle by the protrusion formed on the outer peripheral wall is reduced, and the cap is easily removed from the bottle.
  Here, by forming the tension member so as to form a band connecting the outer surfaces of the outer peripheral walls in the vicinity of the two score portions, the two score portions can be simultaneously torn by pulling the tension member.
  Further, the tension member is reversed after extending to one side of the score portion, and is disposed along the outer surface of the outer peripheral wall, so that the bottle mouth can be made not bulky when the bottle mouth is sealed. Then, when tearing the score portion, by pulling the tension member, the inverted curved portion extends, and the tension member can be pulled at a position away from the outer peripheral wall.
  In addition, by forming a recess at the end of the score portion, the score portion is likely to be broken starting from the recess when the tension member is pulled.
  If the middle part of the tension member is connected to the outer peripheral wall, the tension member can be fixed until the cap is removed, and the tension member does not get in the way when the bottle is stored in a box or the like.
  Furthermore, by forming a collar part on the outer peripheral wall on the opposite side of the tension member, the cap can be easily removed from the bottle by lifting the collar part after tearing the score part.
  Further, by forming the tension member adjacent to the two score portions between the two score portions, the score portion can be torn and the tension member can be separated from the outer peripheral wall. Thereby, the engagement force between an outer peripheral part and a bottle becomes small, and a cap can be easily removed from a bottle.
  In this case, by forming the collar part in the vicinity of the tension member, the outer peripheral part where the tension member is separated and broken can be pulled away from the bottle by lifting the collar part.
[0007]
The above object, other objects, features, and advantages of the present invention will become more apparent from the following detailed description of embodiments of the present invention with reference to the drawings.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a plan view showing an example of the cap of the present invention, and FIG. 2 is a side view thereof. The cap 10 is formed by injection molding or the like using, for example, a synthetic resin. The cap 10 includes a disk-shaped top wall 12. Three hemispherical convex portions 14 are formed on the same circumference on one surface of the top wall 12. Furthermore, a cylindrical outer peripheral wall 16 is formed so as to extend from the end of the top wall 12 toward the other surface. As shown in FIG. 3, a first protrusion 18 is formed on the inner surface of the outer peripheral wall 16 so as to protrude inward from a portion near the end of the outer peripheral wall. In addition, a second protrusion 20 is formed on the inner surface of the outer peripheral wall 16 so as to protrude inward on the top wall 12 side from the first protrusion 18. Here, the first protrusion 18 is formed to protrude larger than the second protrusion 20.
[0009]
As shown in FIGS. 4 and 5, the first protrusion 18 and the second protrusion 20 are formed so as to make a round along the inner surface of the outer peripheral wall 16, but one protrusion is continuous. Instead of being formed, it is formed so as to go around the inner surface of the outer peripheral wall 16 by a plurality of protruding pieces. In addition, the 1st projection part 18 and the 2nd projection part 20 may be formed so that one projection part may make one round continuously.
[0010]
Inside the outer peripheral wall 16, a first inner peripheral wall 22 is formed concentrically with the outer peripheral wall 16. The first inner peripheral wall 22 is formed in a cylindrical shape so as to extend in the same direction as the outer peripheral wall 16 from the other surface of the top wall 12. A third protrusion 24 is formed on the outer surface of the first inner peripheral wall 22 so as to protrude toward the outer peripheral wall 16. The third protrusion 24 is formed on the outer surface near the end of the first inner peripheral wall 22 so as to be a continuous ring.
[0011]
Inside the first inner peripheral wall 22, a second inner peripheral wall 26 is formed concentrically with the outer peripheral wall 16 and the first inner peripheral wall 22. The second inner peripheral wall 26 is formed in a cylindrical shape so as to extend in the same direction as the outer peripheral wall 16 and the first inner peripheral wall 22 from the other surface of the top wall 12. Here, the second inner peripheral wall 26 is formed so as to project more from the top wall 12 than the first inner peripheral wall 22. The connecting portion between the second inner peripheral wall 26 and the top wall 12 is formed in a curved shape on the outer surface side of the second inner peripheral wall 26, and becomes thicker from the second inner peripheral wall 26 toward the top wall 12. Formed as follows.
[0012]
A fourth protrusion 28 is formed on the outer surface of the second inner peripheral wall 26 so as to protrude toward the outer peripheral wall 16. The fourth protrusion 28 is formed on the outer surface near the end of the second inner peripheral wall 26 so as to be a continuous ring. Since the second inner peripheral wall 26 protrudes more than the first inner peripheral wall 22, the third protrusion 24 and the fourth protrusion 28 are formed at positions shifted from each other when viewed from the top wall 12. .
[0013]
A fifth protrusion 30 is formed on the other surface of the top wall 12 between the outer peripheral wall 16 and the first inner peripheral wall 22. The fifth protrusion 30 is formed concentrically with the outer peripheral wall 16, the first inner peripheral wall 22 and the second inner peripheral wall 26. The fifth protrusion 30 is formed to be a continuous ring so as to protrude from the top wall 12 toward the outer peripheral wall 16.
[0014]
An annular groove 32 is formed on the other surface of the top wall 12 along the inside of the second inner peripheral wall 26. The top wall 12 inside the groove 32 is formed thinner than the outside of the groove 32.
[0015]
Further, a thin score portion 34 is formed on the outer side surface of the cylindrical outer peripheral wall 16 facing each other. The two score portions 34 are formed in a linear shape extending obliquely from the end portion of the outer peripheral wall 16 in the same direction. A concave portion 36 is formed at the end of the score portion 34.
[0016]
In the vicinity of the concave portion 36, the pulling member 38 is pulled out from the outer peripheral wall 16 adjacent to the score portion 34. The tension member 38 is formed in a band shape so as to connect the vicinity of the two score portions 34. The tension member 38 is connected to the end portion on the acute angle side of the score portion 34 formed obliquely, and once turned toward the obtuse angle side of the score portion 34, the tension member 38 is reversed by the curved portion 38 a and extends along the outer surface of the outer peripheral wall 16. Arranged so as to make a half turn. Further, the tension member 38 is formed by being bent so as to be close to the outer peripheral wall 16 at a plurality of positions in the middle portion, and is connected to the outer peripheral wall 16 by the connecting portion 40 at that portion. In addition, the connection part 40 may be formed in one place. Further, on the opposite side of the tension member 38, a flange 42 is formed extending outward from the end of the outer peripheral wall 16. A rib 44 for reinforcement is formed between the outer peripheral wall 16 and the flange portion 42.
[0017]
The cap 10 is placed on the mouth of a bottle such as a milk bottle. As the shape of the bottle mouth, for example, as shown in FIG. 6, there is a shape called a round bottle mouth. The bottle 50 is formed so as to be inclined so that the outer surface 52 expands toward the mouth. Further, a stepped portion 56 is formed on the inner side surface 54 of the bottle 50, and a protrusion 58 is formed inside the stepped portion 56.
[0018]
When such a bottle 50 is covered with the cap 10, the outer peripheral wall 16 is disposed along the outer surface 52 around the mouth of the bottle 50, and the first protrusion 18 and the second protrusion 20 are outside the bottle 50. It is pressed against the side surface 52. Further, the first inner peripheral wall 22 is disposed along the inner side surface 54 of the bottle 50, and the third protrusion 24 is pressed against the inner side surface 54. Further, the fourth protrusion 28 formed on the second inner peripheral wall 26 is pressed against the protrusion 58 formed on the stepped portion 56 of the bottle 50 so as to be caught. Furthermore, the fifth protrusion 30 is pressed against the end surface 60 of the bottle 50 by covering the cap 10 with the mouth of the bottle 50.
[0019]
In the cap 10, the first protrusion 18 and the second protrusion 20 are constituted by a plurality of protrusions. Therefore, when the cap 10 is placed on the bottle 50, the protrusions are not formed. The outer peripheral wall 16 extends and the force applied to the outer peripheral wall 16 is dispersed. Therefore, the cap 10 can be put on the bottle 50 without the score part 34 being torn. Further, after the cap 10 is put on the bottle 50, the cap 10 returns almost to the shape at the time of molding, and the first protrusion 18 and the second protrusion 20 are pressed against the outer surface 52 of the bottle 50.
[0020]
In such a state, even if a force is applied in the direction in which the cap 10 is pulled out, the first projecting portion 18 and the second projecting portion 20 of the cap 10 are pressed against the inclined outer surface 52 of the bottle 50 and the engaging force is applied. Occurs and the cap 10 is difficult to be removed. Further, on the inner side of the bottle 50, the fourth protrusion 28 of the cap 10 is pressed against the protrusion 58 formed in the step portion 56, and an engagement force is generated, so that the cap 10 is hardly detached. At this time, since the fourth protrusion 28 is formed in a continuous annular shape, a sealing effect can be obtained by being pressed against the inside of the bottle 50.
[0021]
Further, the third protrusion 24 of the cap 10 is pressed against the inner side surface 54 of the bottle 50. The inner surface 54 of the bottle 50 is not formed with an inclination or a protrusion that generates an engaging force with the third protrusion 24, but the third protrusion 24 is formed in a continuous annular shape. Therefore, a sealing effect can be obtained. Further, the fifth protrusion 30 of the cap 10 is pressed so as to contact the end surface 60 of the bottle 50. Since the fifth protrusion 30 is also formed in a continuous annular shape, a sealing effect can be obtained by being pressed against the end surface 60 of the bottle 50.
[0022]
As described above, by using the cap 10, it is possible to obtain an engagement force with the first protrusion 18, the second protrusion 20, and the fourth protrusion 28, and it is difficult for the cap 10 to be detached from the bottle 50. . Furthermore, since the sealing effect is obtained by the third protrusion 24, the fourth protrusion 28, and the fifth protrusion 30, leakage of contents can be prevented.
[0023]
In this cap 10, since the groove | channel 32 is formed in the top | upper surface wall 12 along the inner side of the 2nd inner peripheral wall 26, and the top | upper surface wall 12 is formed thinly in the inside, the temperature of the bottle 50 is changed. When the inner pressure becomes low, the top wall 12 inside the groove 32 tends to bend toward the inside of the bottle 50 as shown in FIG. In the cap 10, the fifth protrusion 30 does not protrude perpendicularly to the top wall 12 but protrudes so as to incline toward the outer peripheral side as indicated by a dotted line in FIG. When bent, as shown by a solid line in FIG. 8, the contact area between the fifth protrusion 30 and the end surface 60 of the bottle 50 is increased, and the sealing effect can be enhanced.
[0024]
Further, when the pressure inside the bottle 50 is increased, the top wall 12 inside the groove 32 is easily bent toward the outside of the bottle 50 as shown in FIG. At this time, since the connecting portion between the second inner peripheral wall 26 and the top wall 12 is formed to be thick, the second inner peripheral wall 26 is unlikely to fall inside. Therefore, the engagement force and the sealing effect by the fourth protrusion 28 can be maintained.
[0025]
Thus, in this cap 10, the top wall 12 is formed thinly inside the groove 32, so that the top wall 12 can be easily bent due to the pressure difference between the inside and outside of the bottle 50, and the pressure difference can be absorbed. At this time, since the groove 32 is formed, the top wall 12 is bent at the groove 32 portion, and the force when the top wall 12 is bent is not easily transmitted to other portions. Therefore, the force in the pulling direction applied to the engaging portions such as the first protruding portion 18, the second protruding portion 20, and the fourth protruding portion 28 is reduced, and the cap 10 The detachment from the bottle 50 can be prevented.
[0026]
Further, the cap 10 can be applied to a bottle 50 having a shape called a bead bottle mouth as shown in FIGS. In the case of the bottle 50 as shown in FIG. 10, the outer surface 52 is formed straight without being inclined as compared with the round bottle opening, and the stepped portion 62 is formed on the lower side thereof. In this case, the first protrusion 18 of the cap 10 is engaged with the stepped portion 62. At this time, since the outer surface 52 of the bottle 50 is not inclined, almost no engaging force is generated in the second protrusion 20. However, the engaging force is generated in the first protrusion 18 and the fourth protrusion 28, and the cap can be easily removed from the bottle 50.
[0027]
Further, in the case of the bottle 50 as shown in FIG. 11, since the step portion is not formed on the inner side surface 54, the fourth protrusion 28 does not contact the bottle 50, and no engaging force is generated in this portion. The sealing effect cannot be obtained. However, since the engaging force is obtained when the first protrusion 18 is hooked on the stepped portion 62 of the bottle 50, and the sealing effect can be obtained by the third protrusion 24 and the fifth protrusion 30, the bottle 50. It is difficult to remove from the cap, and a cap with a high sealing effect can be obtained.
[0028]
Thus, this cap 10 is applicable to the bottle 50 of a some shape, and has a structure which is hard to remove | deviate. Therefore, when removing the cap 10 from the bottle 50, the outer peripheral wall 16 is torn by pulling the pulling member 38. That is, by pulling the pulling member 38 in the outer direction of the outer peripheral wall 16, the score portion 34 formed thin is torn as shown in FIGS. 12 to 14.
[0029]
In the cap 10, the pulling member 38 is pulled in the inclined direction of the score portion 34 formed obliquely. Thereby, the connecting portion 40 connected to the outer peripheral wall 16 is cut, and one side of the score portion 34 is pulled. At this time, since the bending portion 38a is formed in the tension member 38, the bending portion 38a is extended, and a length sufficient to pull the tension member 38 can be obtained. Moreover, since the recessed part 36 is formed in the edge part of the score part 34, the score part 34 is easy to tear from this recessed part 36 as the starting point.
[0030]
When the score part 34 is torn, as shown in FIG. 15, the collar part 42 formed on the opposite side of the tension member 38 is lifted. Thereby, the outer peripheral wall 16 is lifted, the engaging force by the 1st projection part 18 and the 2nd projection part 20 becomes small, and the cap 10 can be removed from the bottle 50 easily. At this time, since the tension member 38 is not separated, the number of dust is not increased when the cap 10 is discarded.
[0031]
In the cap 10, since the tension member 38 is formed so as to tie the vicinity of the two score portions 34, the tension member 38 has a loop shape and is easily pulled in the direction of tearing the score portion 34. Therefore, it becomes easy to apply force to the score part 34, and even if the score part 34 is formed a little thick, it can be easily torn. Therefore, the thickness of the score portion 34 can be increased to some extent, and the engagement force by the first protrusion 18 and the second protrusion 20 can be increased.
[0032]
In addition, the tension member 38 is disposed along the outer surface of the outer peripheral wall 16 and is connected to the outer peripheral wall 16 by the connecting portion 40 at an intermediate portion thereof, so that the pulling member 38 has a sufficient length to be pulled. Regardless, it fits in an unobtrusive size. Therefore, the caps are not entangled with each other in the box when the cap 50 is put on the bottle 50 or when the bottle 50 is transported. Therefore, it is possible to prevent unintentional opening during transportation and supply failure in the cap supply machine.
[0033]
In addition, as shown in FIG. 16, the 2nd inner peripheral wall 26 does not need to be formed as an internal structure of the cap 10. In the case of such a cap 10, the engagement portion and the seal portion between the cap 10 and the bottle 50 are the same as those of the cap shown in FIG. 11, but the groove 32 is formed on the top wall along the inside of the first inner peripheral wall 22. 12 is formed. Further, by forming the top wall 12 so that the top wall 12 is thin on the inner peripheral side of the groove 32 and the top wall 12 is thick on the outer peripheral side of the groove 32, the pressure difference between the inside and the outside can be absorbed.
[0034]
When such a cap 10 is used for the bottle 50 having a round bottle mouth as shown in FIG. 6, since there is no second inner peripheral wall 26, an engagement force is obtained between the protrusions 58 inside the bottle 50. However, the engaging force can be obtained by the first protrusion 18 and the second protrusion 20 formed on the outer peripheral wall 16, and the cap 10 can be firmly fixed to the bottle 50. Further, it is not necessary that the two protrusions are formed on the outer peripheral wall 16, and the engaging force may be obtained only by the protrusion 18 at the end of the outer peripheral wall 16.
[0035]
In addition, as the tension member 38, it is good also as a plate-shaped thing extended in the height direction of the outer peripheral wall 16, as shown in FIG.17, FIG.18 and FIG.19. The tension member 38 is formed to protrude upward from the top wall 12. In this case, score portions 34 are formed on both sides of the tension member 38. The score portion 34 is formed on the end side of the outer peripheral wall 16, and an opening 70 is formed between the score portion 34 and the top wall 12. That is, the tension member 38 is formed between the two score portions 34 so as to be adjacent to the score portions 34. As shown in FIG. 19, the score portion 34 is formed so that the opening 70 side is thin, and the score portion 34 is thicker toward the end side of the outer peripheral wall 16. Further, in the vicinity of the tension member 38, the flange portion 42 is formed so as to protrude outward from the outer peripheral wall 16.
[0036]
When the cap 10 is removed from the bottle using such a pulling member 38, the portion protruding onto the top wall 12 is pulled with a finger on the pulling member 38, whereby (A) (B) (C ), The score portion 34 is torn from the opening 70 side. Then, the tension member 38 is separated from the outer peripheral wall 16 and a part of the outer peripheral wall 16 is removed. Therefore, the engagement force by the 1st projection part 18 and the 2nd projection part 20 becomes small. At this time, the score unit 34 is torn starting from a thin portion. In this way, by changing the thickness of the score portion 34, the necessary strength can be usually obtained, and when the cap 10 is removed, the property of being easily torn can be obtained.
[0037]
When the collar portion 42 is pulled up in such a state, the end portion of the outer peripheral wall 16 is lifted in the vicinity of the portion where the tension member 38 is removed. Thereby, the 1st projection part 18 and the 2nd projection part 20 are pulled apart from the bottle 50, and the cap 10 can be easily removed from the bottle 50. FIG.
[0038]
In addition, after putting the cap 10 on the bottle 50, as shown in FIG. 21, you may cover the cap 10 with the heat-shrinkable film 80 etc. As shown in FIG. At this time, the heat-shrinkable film 80 is covered so as to cover the outside of the bottle 50 from the convex portion 14 formed on the top wall 12. By doing in this way, the edge part of the heat-shrinkable film 80 will be in the state raised by the convex part 14, and it can make it easy to peel off the heat-shrinkable film 80.
[0039]
【The invention's effect】
According to the present invention, it is possible to obtain a cap that can be used for a bottle having a plurality of shapes and that prevents the cap from coming off and prevents leakage of contents due to an internal pressure change due to a temperature change.
In such a cap, by forming the score portion and the tension member, the cap can be easily removed from the bottle.
[Brief description of the drawings]
FIG. 1 is a plan view showing an example of a cap according to the present invention.
FIG. 2 is a side view of the cap shown in FIG.
FIG. 3 is an illustrative view showing an internal structure of the cap shown in FIG. 1;
4 is an illustrative view showing an end face of the cap shown in FIG. 1; FIG.
FIG. 5 is an illustrative view showing an arrangement of second protrusions of the cap shown in FIG. 1;
6 is an illustrative view showing one example when the cap shown in FIG. 1 is put on a bottle. FIG.
FIG. 7 is an illustrative view showing a state when the pressure inside the bottle is reduced when the cap is put on the bottle.
FIG. 8 is an illustrative view showing a state of a fifth protrusion in the state shown in FIG. 7;
FIG. 9 is an illustrative view showing a state when the pressure inside the bottle increases when the cap is put on.
FIG. 10 is an illustrative view showing another example when the cap shown in FIG. 1 is put on a bottle.
FIG. 11 is an illustrative view showing still another example when the cap shown in FIG. 1 is put on a bottle.
FIG. 12 is a plan view showing a state where a pulling member is pulled to remove a cap.
FIG. 13 is an illustrative view showing a state of an end face of a cap when a tension member is pulled.
FIG. 14 is a side view showing a state of the cap when the tension member is pulled.
FIG. 15 is an illustrative view showing a state in which the collar portion is lifted to remove the cap.
FIG. 16 is an illustrative view showing another example of the cap of the present invention;
FIG. 17 is a side view showing still another example of the cap of the present invention.
18 is a plan view of the cap shown in FIG.
FIG. 19 is an illustrative view showing the inside of the cap shown in FIG. 17;
20 (A) to 20 (C) are illustrative views showing a state in which the pulling member of the cap shown in FIG. 17 is pulled.
FIG. 21 is an illustrative view showing a state when a heat-shrinkable film is covered so as to cover the cap.
[Explanation of symbols]
10 cap
12 Top wall
14 Convex
16 outer wall
18 First protrusion
20 Second protrusion
22 1st inner wall
24 Third protrusion
26 Second inner peripheral wall
28 Fourth projection
30 fifth protrusion
32 grooves
34 Score part
36 recess
38 Tensile member
40 connections
42 Buttocks

Claims (14)

Plate-like top wall,
A cylindrical outer peripheral wall formed so as to extend in a direction intersecting the surface of the top surface wall at the outer peripheral portion of the top surface wall;
At least one annular protrusion formed so as to protrude from the inner surface of the outer peripheral wall and round the inner surface of the outer peripheral wall;
A cylindrical inner peripheral wall extending in the same direction as the outer peripheral wall from the top wall on the inner peripheral side of the outer peripheral wall ;
Protrusions are formed to protrude to the outer surface of the front Symbol inner peripheral wall, is formed so as to go around in succession an outer surface of the inner wall,
Another cylindrical inner peripheral wall extending in the same direction as the outer peripheral wall from the top wall on the inner peripheral side of the inner peripheral wall; and
A cap including a protrusion formed to protrude from an outer surface of the other inner peripheral wall and continuously formed around the outer surface of the other inner peripheral wall . 2. The cap according to claim 1, wherein a connecting portion between the other inner peripheral wall and the top wall is curved in order to thicken a connecting portion between the another inner peripheral wall and the top wall. The protrusion is formed so as to continuously make a round between the outer peripheral wall and the inner peripheral wall, and includes a protrusion protruding in the same direction as the outer peripheral wall from the top wall, and the protrusion protruding from the top wall is the The cap according to claim 1 or 2 formed so that it may protrude toward the perimeter side of a top surface wall. The cap according to any one of claims 1 to 3, wherein a groove is formed in the top wall along the inside of the other inner peripheral wall. The cap according to claim 4, wherein a thickness of the top wall on the inside of the groove is made thinner than a thickness of the top wall on the outside of the groove. The protrusion part formed in the said outer peripheral wall is comprised by the protrusion piece formed in multiple numbers at intervals so that the inner surface of the said outer peripheral wall may be made a round. cap. The tensile member for pulling in order to tear the said score part including the thin score part formed in linear form in two places of the said outer peripheral wall was formed in any one of Claims 1 thru | or 6. cap. The said tension member is a cap of Claim 7 formed so that it might become a strip | belt shape which connects the outer surface of the said outer peripheral wall in the vicinity of the two said score parts. The tension member is formed to extend from the connecting portion with the outer peripheral wall to one side of the score portion along the outer peripheral wall, and after being inverted, along the outer surface of the outer peripheral wall on the other side of the score portion. The cap according to claim 8, which is arranged so as to have a substantially half circumference. The cap according to claim 8 or 9, wherein a concave portion is formed at an end of the score portion. The cap according to any one of claims 8 to 10, wherein one or more intermediate portions of the tension member are connected to an outer surface of the outer peripheral wall. The cap according to any one of claims 8 to 11, further comprising a flange portion formed outward from the outer peripheral wall on the opposite side of the tension member. The tension member is formed adjacent to the two score portions between the two score portions, and by pulling the tension member, the score portion is torn and the tension member is separated from the outer peripheral wall. The cap according to claim 7, which is configured as described above. The cap according to claim 13, further comprising a flange portion formed outward from the outer peripheral wall in the vicinity of the tension member.

Images