JP5504364B2 - Synthetic resin stopper - Google Patents

Description

  The present invention relates to a stopper made of a synthetic resin, which is attached to a container mouth of a glass bottle or the like, and more specifically, a synthetic resin that can withstand a rise in internal pressure in a bottle and is suitable for a bottle of sake filled with sake or the like. It is related to the made stopper.

  Conventionally, the mouth of a bottle of sake used in a container for sake or the like is sealed with a synthetic resin stopper.

  However, when the pressure in the bottle rises due to a temperature change in the room or the like, the stopper may not be able to withstand the pressure in the bottle and may be pushed out of the container mouth or jumped out. This is because the frictional force between the stopper made of polyethylene or the like and the inner surface of the bottle mouth is small.

In order to solve the above problem, the following method is employed.
(1) The inner cylinder of the stopper that is in contact with the inner peripheral surface of the container mouth is coated or embossed with aluminum foil to make the inner cylinder surface rough and increase the frictional force with the inner surface of the bottle mouth. (For example, see Patent Documents 1 and 5).
(2) An air vent is provided in the inner cylinder of the stopper, and when the pressure in the bottle reaches a certain level or more, the stopper rises slightly, and the pressure in the bottle is released to the outside through the air vent. (See Patent Documents 2, 3, and 4).

Japanese Utility Model Publication No. 52-22358 Utility Model Registration No. 3098738 Japanese Patent No. 3479696 JP 2001-206397 A JP 2005-41484 A

The conventional example has the following problems.
(1) Since the aluminum foil is strongly bonded to the stopper by heat welding, it is very difficult to separate the aluminum foil according to the material at the time of disposal. Further, the embossing of the inner cylinder cannot cope with a sudden pressure increase in the bottle.
(2) When the pressure in the container suddenly increases, the stopper may pop out from the container opening before the air vent functions.

In addition, any of the above-mentioned conventional stoppers has a difficulty in grasping the stopper firmly because the stopper must be pulled out by placing a finger on the flange part slightly protruding outside the bottle mouth part when opening the stopper. Therefore, the opening operation cannot be performed smoothly.

  In view of the above circumstances, an object of the present invention is to obtain a stopper that does not come off or pop out even when the internal pressure of the container rapidly increases. Another object is to facilitate the opening operation.

  The present invention includes an inner cylinder that is erected on the top wall and is inserted inside the container mouth, and an outer cylinder that is erected on the top wall concentrically with the inner cylinder and covers the outer side of the container mouth. And the outer cylinder has a cut-out portion that is cut off and removed from the plug, and a locking portion that locks to the engaging portion of the container mouth portion. A plurality of circumferentially spaced and remaining portions that remain without being cut off, and after the cut portions are removed, the residual portions are picked up with a finger and lifted obliquely upward, The engaging part of the outer cylinder can be removed from the engaging part of the container mouth part.

  The present invention is characterized in that the remaining portion is formed in an inverted trapezoidal shape. The present invention is characterized in that the cutout portion is provided with a locking portion that is locked to the engaging portion of the container mouth portion. The present invention is characterized in that a knob portion is provided at a break start portion of the cut portion. In the present invention, a seal cylinder is erected between the outer cylinder and the inner cylinder on the top wall, and the seal cylinder is configured so that when the stopper is attached to the container mouth portion, It is in contact with the upper end surface of the container mouth portion.

  The stopper according to the present invention has an engaging portion that engages with the engaging portion of the container mouth portion, and has a remaining portion that remains without being cut off, so that the stopper of the stopper to the bottle mouth portion is reliable. Even if the internal pressure of the container suddenly rises, it is possible to effectively prevent the stopper from coming off or popping out.

  Moreover, the remaining part has a function as a holding part at the time of opening. By placing a finger on the remaining portion and pulling it up obliquely, the lock with the bottle can be easily removed, and the stopper can be smoothly removed from the container mouth.

  Furthermore, since an air vent portion communicating with the notch portion is provided on the outer peripheral surface of the inner cylinder on the lower annular protrusion side, air in the container escapes from the air vent portion at the time of stoppering. Therefore, the plugging work becomes easy. Further, when the internal pressure of the container rises during storage or the like, air escapes from the air vent portion and the internal pressure decreases, so that the plug can be reliably prevented from coming off and popping out.

It is a side view which shows 1st Embodiment of this invention. It is a rear view which shows 1st Embodiment of this invention. It is a front view which shows 1st Embodiment of this invention. It is a longitudinal section showing a 1st embodiment of the present invention. It is a figure which shows 1st Embodiment of this invention, and is a longitudinal cross-sectional view which shows the state which mounted | wore the container opening part. It is a longitudinal cross-sectional view which shows the state which cut off the cutting part of FIG. It is an enlarged longitudinal cross-sectional view which shows the state which the stopper raises and leaks air. It is a front view which shows the state which removed the cutout part of the stopper. It is a side view which shows 2nd Embodiment of this invention. It is a front view which shows 2nd Embodiment of this invention. It is a rear view which shows 2nd Embodiment of this invention. It is a longitudinal section showing a 3rd embodiment of the present invention. It is a bottom view of an inner cylinder. It is a longitudinal cross-sectional view which shows the state of the 1st step of a stopper. It is a longitudinal cross-sectional view which shows the state of the 2nd step of a stopper. It is a longitudinal cross-sectional view which shows the state of the 3rd step of a stopper. It is a longitudinal cross-sectional view which shows the state of the 4th step of a stopper. It is a longitudinal section which shows the internal pressure rise initial state of a container. It is a longitudinal cross-sectional view which shows the exhaust state accompanying the internal pressure rise of a container.

  A first embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 4, the plug 1 is made of a synthetic resin such as polyethylene, and has an inner cylinder 5 standing on the top wall 3 and an outer cylinder standing on the top wall 3 concentrically with the inner cylinder 5. A cylinder 7 and a seal cylinder 9 provided between the outer cylinder 7 and the inner cylinder 5 are provided.

  In addition, a plurality of longitudinal grooves 5a extending in the axial direction are formed on the inner peripheral surface of the inner cylinder 5, and the outer peripheral surface is spaced apart by a constant interval, for example, 2 mm in the axial direction. An annular protrusion 11 and a lower annular protrusion 13 are provided. These annular protrusions 11 and 13 are provided closer to the top wall 3 than the locking portion 23 of the remaining portion 19.

  Further, the lower annular protrusion 13 is provided with a notch 15. The notch 15 is an air passage, and the shape, size, number, position, and the like are appropriately selected as necessary. Preferably, the notches 15 are formed in a V-shaped cross section and are provided at equal intervals over the entire circumference of the inner cylinder 5.

  At the lower end of the seal tube 9, a contact portion 9 a that comes into contact with the upper end surface of the container mouth portion 2 is provided. The thickness, shape, and the like of the seal cylinder 9 are appropriately selected as necessary.

  As shown in FIG. 3, the outer cylinder 7 includes a cutout portion 17 and a remaining portion 19. The cutout portion 17 is a portion that is removed from the stopper 1, and is connected to the top wall 3 through a thin portion 22. The cutout portion 17 includes a locking portion and a knob portion 21. The locking portion is an annular protrusion that is locked to the annular recess 2a that is the engaging portion of the container mouth portion 2, and the knob portion 21 is located below the remaining portion 19 and is formed in a rectangular shape. .

  As shown in FIG. 1, two remaining portions 19 are provided at intervals in the circumferential direction, each of which is formed in an inverted trapezoidal shape, and an annular recess 2a of the container mouth portion 2A is formed on the lower inner surface thereof. A locking portion 23 is provided for locking to. The circumferential formation width and number of the remaining portions are appropriately selected. Preferably, two or three remaining portions are provided at equal intervals in the circumferential direction.

  Next, the operation of the present embodiment will be described. After filling the container 2 with the contents, the stopper 1 is attached to the container mouth 2A. As shown in FIG. 5, the seal cylinder 9 is brought into contact with the upper end surface of the mouth portion 2A, and the stopper portion 23 is closed in a state of being locked to the annular recess 2a of the container mouth portion. At this time, the outer peripheral surface of the inner cylinder 5 is in close contact with the inner peripheral surface of the container mouth portion 2A. By forming the vertical groove 5 a on the inner peripheral surface of the inner cylinder 5, the adhesion to the container mouth portion 2 </ b> A can be enhanced.

  In opening the plug, first, the knob portion 21 is picked with a finger and pulled in the circumferential direction, the thin portions 22 and 25 are cut, and the cut portion 17 is removed. Next, the remaining portion 19 is picked up with a finger and is lifted obliquely upward, and after the locking portion 23 is removed from the annular recess 2a of the mouth portion 2A, the plug 1 is further lifted to achieve opening. After the desired amount of content has been poured out, the cap is closed.

  Even if the pressure in the container 2 rises during storage of the container, the remaining portion 19 formed on the stopper 1 is firmly locked to the container opening 2A, so that the stopper 1 can be prevented from popping out. Further, even when the container 2 is stored in a high temperature environment and the pressure in the container 2 suddenly increases, as shown in FIG. 7, the stopper 1 locks the remaining portion 19 to the container mouth 2A. While maintaining the state, until the notch 15 of the lower annular protrusion 13 communicates with the outside air, it slightly rises upward (in the direction of 5A) and releases the pressure (air) A in the container 2 to the outside. Jumping out can be effectively prevented.

  A second embodiment of the present invention will be described with reference to FIGS. 9 to 11. The same reference numerals as those in FIGS. 1 to 7 have the same names and functions. The difference between this embodiment and the first embodiment is the number of remaining portions. That is, in the first embodiment, the two remaining portions 19 are formed, but in this embodiment, three remaining portions 30 are formed. The remaining portions 30 have the same structure as the remaining portion 19 and are arranged at equal intervals in the circumferential direction.

  A third embodiment of the present invention will be described with reference to FIGS. 12 to 19. The same reference numerals as those in FIGS. 1 to 11 have the same names and functions. The difference between this embodiment and the first embodiment is that an air vent portion is provided in the inner cylinder (inner ring). This air vent portion is an air passage, and is formed by, for example, vertical ribs 32. Has been.

  The vertical rib 32 is erected on the outer peripheral surface of the inner cylinder 5, and extends in the axial direction from the lower annular protrusion 13 to the lower end portion 5 b of the inner cylinder 5. A plurality of the longitudinal ribs 32 are provided at regular intervals in the circumferential direction, for example, twelve, but the number can be appropriately selected as necessary.

  The height of the vertical rib 32, that is, the amount of protrusion from the outer peripheral surface of the inner cylinder is, for example, 0.2 mm, but this height is appropriately selected within a range not exceeding the amount of protrusion of the lower annular protrusion 13 can do.

  The width of the vertical rib 32, that is, the length in the circumferential direction is, for example, 0.4 mm, and the value of this width is appropriately selected as necessary.

  Each of the vertical ribs 32 is disposed at an intermediate portion between the adjacent cutout portions 15 and 15 and forms an air vent portion communicating with the cutout portion 15. The arrangement position of the vertical ribs 32 is not necessarily the intermediate portion, and the length thereof does not have to extend from the lower annular protrusion 13 to the lower end portion 5b of the inner cylinder 5, and these are necessary. It is also possible to change as appropriate.

  Next, the operation of the present embodiment will be described. As described in the first embodiment, the stopper 1 is plugged into the container mouth portion 2A. At this time, the displacement of the engaging portion 23 and the vertical rib 32 of the outer cylinder 7 will be described with reference to FIGS. 14 to 17, but the cutout portion of the outer cylinder 7 is omitted in these drawings.

  As shown in FIG. 14, when the lower end portion 5b of the inner cylinder 5 is inserted into the inner surface of the container mouth portion 2A, the vertical rib 32 comes into contact with the inner surface 2c of the container mouth portion 2A. A clearance C (gap) is generated between the surface and the inner surface 2c. At this time, the upper and lower annular protrusions 11 and 13 are not in contact with the inner surface 2c of the container mouth portion 2A.

  Therefore, since the inside of the container 2 communicates with the outside through the clearance C, the air A in the container 2 is discharged outside the apparatus. Therefore, in the first stage, the compression of the air volume in the container 2 does not start, so that the plug 1 does not receive a large air resistance.

  As shown in FIG. 15, when the stopper 1 is displaced downward and the inner cylinder 5 is further inserted into the container mouth portion 2A, the locking portion 23 of the outer cylinder 7 contacts the container mouth portion 2A. In the second stage, as in the first stage, the clearance C is ensured equally by the height of the vertical ribs 32. Therefore, the compression of the volume of the air A in the container 2 does not start, so that the plug 1 is displaced without receiving a large air resistance.

  As shown in FIG. 16, when the stopper 1 moves further downward, the locking portion 23 approaches the annular recess 2a of the container mouth portion 2A. The lower annular projection 13 of the inner cylinder 5 enters the container mouth portion 2A, the upper annular projection 11 moves to the vicinity of the container mouth portion 2A, and the seal cylinder 9 approaches the inner surface 2c of the container mouth portion 2A. Then, it will be in the state just before completion of closure. Therefore, in this third stage, the flow rate of the air A in the container 2 that passes through the air vent portion is restricted, so volume compression of the air in the container 2 starts.

  As shown in FIG. 17, when the stopper 1 moves further downward, the seal cylinder 9 comes into contact with the container mouth portion 2A, and the engaging portion 23 engages with the annular recess 2a, the stoppering operation is completed.

  In this fourth stage, since the upper annular protrusion 11 is pressed against the inner surface 2c of the container mouth portion 2A, even if the air A in the container 2 passes through the clearance C and reaches the cutout portion 15 of the lower annular protrusion 13, It is not discharged outside the vessel. The air pressure in the container 2 in the fourth stage is lower than that in the conventional example that does not form an air flow path. In this embodiment, the air pressure is 2.6 kPa, for example, which is 1/3 of that in the conventional example. It becomes.

  Although the plugging operation is completed through the above-described steps, in this embodiment, since the vertical rib 32 is provided as described above, it is between the outer peripheral surface of the inner cylinder 5 and the inner surface of the container mouth portion 2A. The clearance C can be reliably formed. Therefore, even if the diameter of the lower end portion 5b of the inner cylinder 5 is increased and brought close to the inner surface 2c of the container mouth portion 2A in order to improve the sealing performance, the clearance C exists, which hinders the air vent function. There is nothing.

  Further, since the vertical rib 32 is thin, the vertical rib 32 may be crushed due to secular change or the like after mounting with a stopper and may be deformed to have a low height. In this case, since the vertical ribs 32 are in close contact with the inner surface 2c of the container mouth portion 2A, the sealing performance is improved. Further, even if the longitudinal ribs 32 are deformed, the height does not become completely zero, so that the clearance C can be secured even after aging and the air vent function can be maintained.

  Next, a case where the air pressure in the container 2 increases due to a change in the environmental temperature or the like will be described. As shown in FIG. 18, when the pressure in the container 2 rises, the stopper 1 receives a force P in the opening direction and slides upward. At this time, the air A in the container 2 passes through the clearance C formed by the vertical ribs 32 and the notch 15 and reaches the upper annular protrusion 11. The upper annular protrusion 11 is formed on the inner surface of the container mouth 2 </ b> A. The air A cannot flow out of the vessel. Further, since the locking portion 23 of the remaining portion 1a of the stopper 1 is locked to the annular recess 2a of the container mouth portion 2A, the stopper 1 does not come off or jump out.

  Further, when the internal pressure rises, as shown in FIG. 19, the stopper 1 further rises, the locking portion 23 moves upward, comes out of the annular recess 2a and is pressed in the vicinity of the annular recess 2a. The upper annular protrusion 11 of the inner cylinder 5 is separated from the inner surface 2c of the container mouth portion 2A.

  Therefore, since the air A in the container 2 passes through the clearance C and the notch 15 and is discharged outside the container, the pressure in the container 2 decreases and the force for pushing up the plug 1 decreases. Therefore, the stopper 1 does not come off from the container opening 2A or jump out.

The embodiment of the present invention is not limited to the above, and may be as follows, for example.
(1) The shape of the remaining portion is not necessarily limited to the inverted trapezoidal shape, and may be, for example, a square shape. Also, the number of remaining portions is not limited to two or three, and the number of remaining portions can be determined as needed.
(2) Instead of providing a lower annular projection with a notch on the inner cylinder, an axial air vent is provided on the inner cylinder so that the pressure in the container escapes to the outside via the air vent when the internal pressure rises. good.

  (3) The air vent portion may be formed using a vertical groove continuous with the cutout portion of the lower annular protrusion, instead of the vertical rib. Like the vertical rib, the vertical groove extends in the axial direction from the notch portion of the lower annular projection to the lower end portion of the inner cylinder, and is formed in a plurality at intervals in the circumferential direction.

  (4) A longitudinal rib extending in the axial direction may be provided on the outer peripheral surface of the inner cylinder on the side of the lower annular protrusion so as to be separated from the notch portion of the lower annular protrusion. The vertical rib is provided so as to be separated from the cutout portion in the vertical direction or the circumferential direction, and is not directly continuous with the cutout portion. For example, one vertical rib may be disposed on a central line passing through the center of adjacent notches, or a pair is disposed in the circumferential direction with a gap therebetween.

  (5) A longitudinal groove extending in the axial direction may be provided on the outer peripheral surface of the inner cylinder on the side of the lower annular protrusion so as to be separated from the cutout portion of the lower annular protrusion. The longitudinal groove is provided so as to be separated from the cutout portion in the vertical direction or the circumferential direction, and is not directly continuous with the cutout portion. For example, one longitudinal groove is disposed on a central line passing through the center of adjacent notches, or a plurality of central grooves and the vicinity thereof are disposed at intervals in the circumferential direction.

DESCRIPTION OF SYMBOLS 1 Plug 2 Container 2A Container port part 3 Top wall 5 Inner cylinder 7 Outer cylinder 11 Upper annular protrusion 13 Lower annular protrusion 15 Notch part 17 Cutout part 19 Remaining part 23 Locking part 32 Vertical rib

Claims (5)

An inner cylinder that is erected on the top wall and inserted inside the container mouth, and an outer cylinder that is erected on the top wall concentrically with the inner cylinder and covers the outside of the container mouth. A synthetic resin stopper;
The outer cylinder is cut off and removed from the stopper;
It has a locking part that locks to the engaging part of the container mouth part, and is provided with a remaining part that is not cut and is provided with a plurality in the circumferential direction.
After the cut portion is removed, the remaining portion can be picked up with a finger and pulled upward obliquely, whereby the locking portion of the outer cylinder can be removed from the engaging portion of the container mouth portion. A synthetic resin plug.   The synthetic resin plug according to claim 1, wherein the remaining portion is formed in an inverted trapezoidal shape.   The stopper made of a synthetic resin according to claim 1, wherein a locking portion for locking to the engaging portion of the container mouth portion is provided in the cutout portion.   The stopper made of a synthetic resin according to claim 1, wherein a knob portion is provided at a break starting portion of the cut portion. A seal cylinder is erected on the top wall between the outer cylinder and the inner cylinder,
5. The synthetic resin product according to claim 1, wherein the seal cylinder comes into contact with an upper end surface of the container mouth portion when the stopper is attached to the container mouth portion. Plugs.

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