JP2000053152A - Structure for sealing bottle with cap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve safety in handling in spite that the method for unsealing is more simple. SOLUTION: A mouth part outer circumferential face 4 is provided, extending entirely over the circumferential face of a mouth part 3 of a bottle 1 while an inclined part gradually extending in the outer diametral direction toward the mouth top circumferential edge part 5 is provided at the mouth part outer circumferential face 4 with a recessed groove 9 provided at the lower outer circumference thereof, and while a projected protuberance 15 is provided at the circumference of the recessed groove 9, a lock part wherewith the skirt part of a cap 2 is engaged with the recessed groove 9 at the lower part of the mouth part outer circumferential face 4 is provided and the lower end of the cap is turned up in the curllike shape.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealed structure between a glass bottle or a plastic bottle filled with drinking water or a liquid seasoning, and a cap. The present invention relates to an improvement in a sealing structure between a cap and a bottle, which can greatly improve ease of operation.

[0002]

2. Description of the Related Art Aluminum caps for sealing bottles such as drinking water and liquid seasonings are often made of aluminum, most of which have a screw structure, and have a pill fur proof property. It has a break line below the cap to provide it. Then, by rotating the cap in the direction opposite to the clock at the time of opening, the cap is rotated along with the screw, the breaking line is cut therewith, and the cap and the bottle are separated and opened. However, with this structure, there is a danger of cutting off the hand at the cut portion, and the person who opens the package needs to be careful about this. Other aluminum caps used are those commonly called pull-up caps for bottles for cups of sake, shochu, and plum wine. This is provided with a ring for preliminary pinching at a part of the outer peripheral edge of the cap top surface. By pulling up the part to the upper part, a part of the aluminum is torn open, and the lid is removed.
However, since this structure requires a relatively large force at the time of opening, development of a simpler opening method and its structure has been desired. In addition, there is a danger of cutting the hand on the cut surface as in the case described above, and the person who opens the package needs to be careful.

[0003] In addition, beer and other beverages often have a structure with a tin crown, but the drawbacks are that it is necessary to open the bottle at the time of opening and to take measures against rust. Or the user needs to pay attention to hand cuts at the cut. On the other hand, a twist crown method has been developed in the United States, but a large grip force is required at the time of opening, and the fact is that it is not currently used in Japan.

In order to partially overcome these drawbacks, recently, caps made of synthetic resin have been widely used. The caps made of these synthetic resins are attached to the mouth of the container, and various improvements have been made to exhibit the functions of airtightness, PP property, and openability, and those functions have been remarkably improved. However, there are problems such as generation of fine powder due to contact with a machine such as an apparatus and deformation due to heat.

[0005]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned conventional problems and, despite the simpler opening method, can sufficiently maintain the tightness of the bottle container and can handle the bottle container. It is an object of the present invention to provide a sealed structure between a cap and a bottle with improved safety.

[0006]

SUMMARY OF THE INVENTION A cap and bottle sealing structure for solving the above-mentioned problem has a cylindrical bottle with a top opening, a bottomed cylindrical mouth, and a top surface. A cap having an outer peripheral surface hanging down from an outer peripheral edge, wherein the bottle has an outer peripheral surface over the entire peripheral surface at the mouth, and the outer peripheral surface of the mouth is directed toward the periphery of the mouth. An inclined portion gradually spreading in the outer diameter direction is provided, and a concave groove provided with a convex protrusion at least at one place on the circumference is provided on the lower outer periphery, and further on a lower portion continuous with the outer peripheral surface of the mouth. In addition to having a bead portion, the skirt portion of the cap forms a lock portion that engages with the concave groove at the lower portion of the outer peripheral surface of the mouth, and the lower end portion of the cap is curled. Is what you do. Further, after opening, if re-plugging is not required, the maximum outer diameter of the projection is 2 mm larger than the outer diameter of the mouth side.
The outer diameter of the mouth side is larger than the outer diameter of the groove by 0.5 to 1.5 mm, and the maximum outer diameter of the inclined portion is the same as the outer diameter of the mouth or 1 mm.
It is desirable that the inclination angle β of the inclined portion with respect to the horizontal plane be within the range of 0 to 20 °.
Conversely, when reopening is required after opening, it is preferable that the maximum outer diameter of the inclined portion be smaller than the outer diameter of the mouth side surface.

[0007]

Embodiments of the present invention will be described below in detail with reference to the drawings. The sealing structure of the present invention comprises a bottle 1 and a cap 2. First, the structure of the bottle 1 will be described with reference to FIG. The bottle 1 has a cylindrical opening with an open top and a bottom. The material is not particularly limited, but glass, PET resin, or the like is preferable. In the bottle 1, the outer peripheral surface 4 of the mouth 3 is gradually spread in the outer diameter direction below the mouth surface of the mouth outer peripheral surface 4 toward the mouth periphery 5 and the upper portion is inclined with respect to the horizontal plane. The inclined portion 6 is provided over the entire circumference. Here, the inclined portion 6 is more advantageous as it is closer to the peripheral portion 5 of the mouth from the viewpoint of easy opening. In addition, the mouth part peripheral part 5 mentioned here is not only what the shape of the mouth part was just a curved surface shape, but also what has the shape which has a step like used in a beverage bottle (in that case, Is
The term is set and used in order to include the inclined portion 6 from the lower stage to the lower portion. Further, a concave groove 9 is formed on the outer periphery of the lower portion with the mouth side portion 8 interposed therebetween. The concave groove 9 has a protrusion 15 on the circumference. Here, one or more projections 15 may be provided on the periphery of the concave groove 9. The maximum outer diameter of the protruding portion 15 is larger than the outer diameter of the mouth side portion 8 and has a raised shape. A convex bead portion 7 is provided on a circumference of a lower portion continuous with the concave groove 9. In addition, the size varies depending on the capacity and the mouth diameter of the bottle, but the maximum outer diameter of the projection 15 is
The outer diameter of the mouth side portion 8 is larger than the outer diameter of the groove 9 by 2 mm or more than the outer diameter of the mouth side portion 8.
1.5 mm larger, the size of the maximum outer diameter portion of the inclined portion 6 is compared with either the outer diameter size of the mouth side surface portion 8 or the maximum outer diameter size of the peripheral portion of the mouth portion when reopening is not required after opening. Even if it is the same or large within 1 mm, and conversely when re-plugging is required, the size of the maximum outer diameter portion of the inclined portion 6 is:
The same as the maximum outer diameter of the mouth periphery 5 and the mouth side 8
The size is reduced from the mouth side portion 8 to the outside surface of the mouth peripheral portion 5. Furthermore, the inclination angle β of the inclined portion 6 with respect to the horizontal plane is preferably in the range of 0 to 20 ° in order to make the cap 2 inclined and re-plug more difficult when re-plugging is not required.

Next, the structure of the cap 2 will be described with reference to FIG. This cap 2 has a top surface 10,
It has an outer peripheral surface 11 hanging down from its outer peripheral edge, and the cap is mainly made of aluminum. Therefore, a description will be given of a typical aluminum cap. The bottle 1 is covered with the precursor of the cap 2, the lock roller (not shown) of the aluminum PP capper is used to hold down the groove 9 of the bottle 1, and the precursor of the cap 2 is deformed to conform to the shape of the bottle 1. The aluminum cap 2 is rolled. With these structures,
The skirt of the cap 2 forms a lock portion 12 that engages with the concave groove 9 at a lower portion of the outer peripheral surface 4 of the mouth. Further, the lower end portion 13 serving as the skirt portion of the cap 2 may be inwardly or outwardly wound, but is wound in a curl shape, and the inner dimension thereof is larger than the dimension of the maximum outer diameter portion of the inclined portion 6. To Note that a knurl portion may be provided on the outer peripheral surface 11 to make it easier to grasp when the cap 2 is opened. A packing 14 is mounted on the top surface of the inner surface of the cap 2 to maintain the sealing performance.

[0011] The opening method will be described. First, the cap 2 can be opened in either direction by rotating the cap 2 in the opposite direction to the clock (depending on the shape of the projection 15). Alternatively, it is also possible to open the cover only by rotating it in a specific direction.Here, a method of rotating the watch in a direction opposite to the clock is described as a typical example.) The second lock portion 12 is widened by the projection 15 which is a portion on which the concave groove 9 rides, and the size thereof is wider than the mouth side portion 8. Next, the cap 2 is pulled up to a state as shown in FIG. 3 and further pulled up or pushed to one side with a finger or the like to open the cap. Taking as an example the case where re-stopping is not required,
As shown in FIG. 4, by adopting the dimensions and shapes described above, the cap 2 tilts and it becomes difficult to re-cap. Conversely, when re-plugging is required, the maximum outer diameter portion of the inclined portion 6 can be made smaller than the outer diameter size of the rim portion 5.

(Embodiment) In order to measure the residual amount due to the return rotation of the cap, after capping using a wine bottle, first, the diameter of the cap corresponding to the position of the projection 15 and the outer diameter of the cap at the position of the concave groove portion Was measured. Next, when the load on the lock roller side is set to 15 kg and the cap is rotated a specific number of times in the direction for opening the cap, the amount of change in the outer diameter of the cap outer diameter portion in the previously measured concave groove portion is measured. did. Values are shown as negative values. Table 1 shows the results.

[0011]

[Table 1]

According to the measured value of the return amount, when re-plugging is not required, the outer diameter of the mouth side portion 8 can be made larger than the outer diameter of the concave groove 9 by 0.5 to 1.5 mm. It was confirmed that it was good.

[0013]

As described above, according to the sealing structure of the cap and the bottle of the present invention, although the opening method is simpler than the conventional opening method, the handling safety is improved. Things. Further, according to the structure of the present invention, the height of the cap can be reduced, and the cost can be reduced. In addition, no equipment change is required, and can be dealt with by adjusting the conventional tightening capper. Depending on the construction, it can be a replacement for the crown by making it impossible to re-plug. In addition, since the bottle and the cap can be completely separated, social contribution can be expected as a recyclable product. Therefore, the present invention has a high value as a sealing structure between a cap and a bottle that has eliminated the conventional problems, and there is an extremely large contribution to the industry.

[Brief description of the drawings]

FIG. 1 shows a structure of a bottle mouth portion of the present invention.

FIG. 2 is a partially cutaway view showing a fitted state of the cap and the bottle of the present invention.

FIG. 3 is a partially cutaway view showing a state when the cap is opened according to the present invention.

FIG. 4 is a partially cutaway view showing a state in which the plug is to be re-plugged according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bottle 10 Top surface 2 Cap 11 Outer peripheral surface 3 Mouth 12 Lock part 4 Mouth outer peripheral surface 13 Lower part 5 Peripheral part of a mouth 14 Packing 6 Inclined part 15 Projection part 8 Mouth side part 9 Groove

Claims (3)

[Claims] 1. A bottle (1) having an opening at the top and having a bottom and having a cylindrical mouth, and a cap (2) having a top surface (10) and having an outer peripheral surface (11) hanging from an outer peripheral edge thereof. The bottle (1) has a mouth peripheral surface (4) over the entire peripheral surface of the mouth (3), and the mouth peripheral surface (4) has a mouth peripheral portion (5). A) a groove (9) in which an inclined portion (6) gradually expanding in the outer diameter direction is provided, and a convex protrusion (15) is provided on at least one place on the circumference on the lower outer periphery.
The cap (2) further includes a bead (7) at a lower portion that is continuous with the outer peripheral surface (4), and the skirt of the cap (2) is formed at the lower portion of the outer peripheral surface (4). And a cap (2) is formed into a lock portion (12), and the lower end (13) of the cap (2) is curled. 2. The maximum outer diameter of the projection (15) is at least 2 mm larger than the outer diameter of the mouth side part (8), and the outer diameter of the mouth side part (8) is smaller than that of the groove (9). 0.5 to 1.5 mm larger than the outer diameter, the maximum outer diameter of the inclined portion (6) is the same as the outer diameter of the mouth side portion (8) or larger than 1 mm, and furthermore, the inclined portion The sealing structure for a cap and a bottle according to claim 1, wherein the inclination angle β with respect to the horizontal plane in (6) is within a range of 0 to 20 °. 3. The size of the maximum outer diameter portion of the inclined portion (6) is:
The sealing structure between a cap and a bottle according to claim 1, characterized in that it is smaller than the outer diameter of the mouth side part (8).