JPH0142525Y2 - - Google Patents

Description

[Detailed explanation of the idea]

This invention relates to a bottle opening/closing device that opens and closes the mouth of the bottle. BACKGROUND OF THE INVENTION Conventionally, bottle caps used in this type of apparatus have generally been molded from synthetic resin, and polyethylene resin has been particularly used. This is the softening point of the same resin,
This is because it has a relatively low melting point, which makes it easy to mold, and it is also relatively inexpensive. However, as mentioned above, bottle caps made of polyethylene resin have a relatively low softening point, so in the case of liquids to be heated and filled, such as juice, it is necessary to cap the bottle filled with the heated liquid with a polyethylene bottle cap. In this case, the bottle cap becomes accustomed to the bottle due to the heat described above, and its elasticity decreases, resulting in a decrease in the sealing force due to the return of the elastic deformation that occurs during capping. This invention was made to improve this problem, and its purpose was to reduce the reduction in sealing force compared to the conventional method even when a bottle filled with heated liquid is capped as described above. The goal is to obtain a bottle opening/closing device. To describe this invention with reference to drawings showing one embodiment of the invention, in FIGS. 1 to 4, a lid body 1 having a shielding wall 5 and a cylindrical portion 2 fitted on the outside of a bottle mouth 14; A cover 3 having a cylindrical shape or a cylindrical portion that is tightly fitted in an unrotatable manner on the outside of the cover 2; This is a bottle opening/closing device characterized in that the cover 3 is made of synthetic resin. In the figure, 6 is the inner cylinder, 7 is the cut groove, 8 is the cutout, and 9
is a tension ring, 10 is a spout, 11 is an outer lid, 12
is a screw groove, and 13 is a screw thread. Also, 14 is the bottle mouth, 15
16 indicates a recessed portion, 16 indicates an engaging portion, and 17 indicates a protrusion. The cover 3 may be fitted onto the inner plug-shaped lid 1 as shown in FIG. 1, or may be fitted onto a regular lid 1 as shown in FIG. As shown in FIG. 3, this may be formed into a lid shape and covered. Furthermore, the cover 3 is fitted onto the cylindrical portion 2 of the lid 1, but the two may be bonded together with an adhesive, the two may be fused, or the inner diameter of the cover 3 may be The cover 3 may be formed to be slightly smaller than the inner diameter of the cylindrical portion 2, and the cover 3 may be fitted onto the cylindrical portion 2 and pushed into the cylindrical portion 2 with force. In this case, as shown in FIG. 4, a taper 18 may be formed at the end of the cover 3, and the cover 3 may be press-fitted from this portion. Alternatively, the cover 3 may be heated and expanded, and then contracted and crimped after being fitted. Next, Figure 1~
The bottle lid shown in FIG. 4 has a lid body 3 made of polyethylene resin, and a cover 3
Each of these is made of polypropylene resin. The softening point of a synthetic resin varies significantly depending on various factors such as its molecular weight, the presence or absence of a plasticizer, and usage conditions, so it is difficult to give a fixed value. The polypropylene resin used had a softening point of 120°C. The above combination of both resins is an example and is not limited to this, and any combination that has a difference in softening point and can form the lid 1 and the cover 3 may be used, such as vinyl chloride resin and polypropylene resin, or Various other combinations such as polystyrene resin and polypropylene resin are possible. When a heated liquid 19 containing water as a main component, such as alcoholic beverages, youth, etc., is contained in a bottle of this device, and a lid body 1 provided with a cover 3 is fitted to the bottle opening 14, the heated liquid 19 is stored. The bottle is heated by the heat of the water, and the bottle mouth 14 is also heated. In this case, the lid 1 causes so-called conformation to the bottle mouth 14 due to its heat,
Elasticity is reduced. However, on the outside of the cylindrical portion 2 of the lid body 1, a cover 3 made of a synthetic resin whose softening point is higher than that of the synthetic resin forming the lid body 1 and higher than the boiling point of water is fixed. Due to such a tight fit, a large post stress is applied, and due to this post stress, the reduction in sealing performance due to the reduction in elasticity is kept to a relatively small amount. Note that the above-mentioned meaning of "unrotatable" refers to a state in which manual rotation is practically difficult, and does not mean a state in which it is physically impossible to rotate. As for the effectiveness of this device, the following tightness test was conducted using the bottle closing device shown in Figure 1. This test first uses a 360ml bottle and fills it with 95℃ hot water. In this case, there should be some space between the top of the hot water and the top of the bottle mouth. First, cap the bottle with a conventional lid and bring it to room temperature at 20°C.
After leaving it for a week, the degree of vacuum in the space was measured.

[Table] The above unit cm Hg indicates the degree of vacuum.
As is clear from Torrichieri's experiment, the maximum value is 76 cm Hg, and a value close to that indicates a higher degree of vacuum. Therefore, the value indicates the degree of sealing, and if the value is 0, it indicates that there is no sealing effect. This invention is constructed as described above, and the outside of the cylindrical part 2 of the lid 1 made of synthetic resin fitted to the mouth of the bottle has a softening material higher than the synthetic resin of the lid 1 and higher than the boiling point of water. Cover 3 made of point synthetic resin
By tightly fitting them in a non-rotatable manner, the decrease in the sealing force can be made much smaller than in the conventional case when filling a heated liquid mainly composed of water.

[Brief explanation of the drawing]

Figure 1 shows an embodiment of this invention, and shows a half-sectional view of the main parts of the bottle opening/closing device in use.
Figure 3, Figure 4 are the second and fourth figures of this invention, respectively.
FIG. 4 is a diagram showing third and fourth embodiments, each corresponding to FIG. 1; 1...Lid body, 2...Cylinder part, 3...Cover, 5...
...Blocking wall, 14...Bottle opening.

Claims (1)

[Scope of utility model registration request] A lid body 1 having a shielding wall 5 and a cylindrical portion 2 fitted on the outside of the bottle mouth 14; a cylindrical or cylindrical lid that is tightly fitted on the outside of the cylindrical portion 2 in a non-rotatable manner; A bottle opening/closing device characterized in that the cover 3 is made of a synthetic resin having a softening point higher than that of the synthetic resin forming the lid 1 and higher than the boiling point of water.