JPH0423789Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a heat-resistant pressure container having a base cup attached to the bottom of the container body.

(Prior Art) Conventionally, there is a container shown in FIG. 6, for example, as a container to which internal pressure is applied, such as for carbonated drinks. A shows the entire heat-resistant and pressure-resistant container, and this heat-resistant and pressure-resistant container A generally includes a container body 100 and a bottom portion 101 of the container body.
A base cup 102 is attached to the base cup 102. The bottom part 101 of the container body 100 is rounded into a spherical shell shape to increase pressure resistance, and a base cup 10 in the shape of a cylinder with a bottom is attached to the rounded bottom part 101.
2 is attached so that it can stand on its own. This container body 100 is made by preforming a bottomed cylindrical parison 103 made of thermoplastic resin as shown in FIG. I'm starting to do that.

The container body 100 formed in this way is filled with contents in the next step, and then the mouth and neck part 104
After the inside of the container body 100 is sealed by attaching a cap 105 to the container body 105, heat sterilization treatment is performed. Here, in the heat sterilization treatment, the contents are heated through the wall surface of the container body 100 by applying a hot water shower from above the heat-resistant and pressure-resistant container A.

On the other hand, as another conventional example, there is a heat-resistant pressure vessel B as shown in FIG.

In order to form unevenness with a relatively wide width on the inner peripheral surface of the upper end opening of the base cup 114, protruding walls 120 are formed on the upper wall of the peripheral wall 115 of the base cup 114 at regular intervals along the circumferential direction. has been done. This protruding wall 120 allows the peripheral wall 11
A large number of vertical grooves 121 are provided in the upper part of the inner circumferential surface of the container 5, and when the base cup 114 configured in this way is assembled and fixed to the container body 111, the vertical grooves 121
21 connects the container body 111 and the base cup 11.
A gap is formed between the opening part 1 and the opening part 1.
It is set at 18.

The hot water poured onto the container body 111 flows downward along the surface of the container body 111 and reaches the opening 11.
8 to the bottom of the base cup 114.

(Problems to be Solved by the Invention) However, according to such a heat-resistant and pressure-resistant container A of the prior art, the hot water poured from the top of the container body 100 when performing heat sterilization treatment is applied to the surface of the container body 100. However, since the upper opening of the base cup 102 is in close contact with the surface of the container body 100 at the bottom 101, the upper opening of the base cup 102 and the container body 100
Since no gap is formed between the base cup 102 and the base cup 102, hot water for heating and sterilization cannot enter the inside of the base cup 102.
As a result, the content liquid remaining at the bottom of the container body 100 could not be sufficiently heated.

Therefore, in the structure of the conventional example described above, it is not possible to sufficiently heat the contents accumulated inside the container body, particularly at the bottom, and the bottom is located at the lowest end of the container body. Heating the contents by convection is also not expected from a commercial productivity point of view.
There was a problem in that the entire content inside the container body could not be completely sterilized by heat, resulting in a product with poor sterilization.

Furthermore, in the base cup 114 of the heat-resistant pressure vessel B according to another conventional technique, the protruding walls 120 are provided because the arrangement of the protruding walls 120 allows hot water to enter through the openings 118 between the protruding walls 120. The hot water does not flow in the area where the container body 111 is located, and the entire periphery of the bottom of the container body 111 cannot be uniformly heated.
Furthermore, since the opening portion 118 is formed by a vertical groove 121 extending downward in a straight line, the opening portion 118
Since the hot water entering from above 8 immediately falls downward along the vertical groove 112 on the base cup 114 side, the contact time between the hot water and the container body 111 is short.
There is a problem that it cannot be heated sufficiently.

Therefore, the present invention was devised to solve the above-mentioned problems of the prior art.The purpose of this invention is to increase the heating time of the bottom of the container body, and to sterilize the contents inside the bottom of the container body by heating. To provide a heat-resistant and pressure-resistant container capable of uniformly and uniformly heat sterilizing the entire contents accommodated in the container.

(Means for Solving the Problems) In order to achieve the above object, the present invention includes a hollow container body whose bottom part protrudes like a hemispherical shell, and a container body which is attached to the bottom part of the container body. In a heat-resistant and pressure-resistant container having a bottomed cylindrical base cup, a spiral protrusion is provided on the inner wall of the base cup in order to introduce hot water poured onto the surface of the container body into the bottom of the container body covered by the base cup.

(Function) According to the present invention, a spiral protrusion is provided on the inner wall of the base cup. Therefore, when the base cup is attached to the bottom of the container body, a spiral passage is formed between the inner wall of the base cup and the container body.
The hot water poured over the container body travels over the container body from the top, and when it reaches the base cup, it flows through the spiral passage formed in the base cup, which can prolong the contact time with the container body. The bottom can be sufficiently brought into contact with hot water, and the liquid inside the bottom of the container body can also be completely sterilized.

(Example) The present invention will be explained below based on the illustrated example.

1 to 3 show a first embodiment of a heat-resistant pressure vessel according to the present invention. In Figure 1,
A indicates the entire container, and this container A is composed of a container body 1 having a hollow interior and a base cup 2 attached to the bottom portion 1a of the container body 1.

The container body 1 is made of thermoplastic resin such as polyester resin, and includes a cylindrical body 1b, a shoulder 1c and a neck part 1d that are continuously molded above the body 1b.
From the bottom part 1a (including not only the lowest end of the bottle but also the lower edge around it) that is continuously provided at the lower end of the body part 1b and projects downward in a spherical shell shape so as to withstand the pressure of the contents. It is filled with gas-containing contents such as carbonated drinks.

The bottom portion 1a of the container body 1 has a central portion partially crystallized by heat to form a thermally crystallized portion in order to increase strength and heat resistance. All regions other than the crystallized portion are stretched at a high stretching ratio. Furthermore, the mouth and neck portion 1d is also crystallized by heat.

FIG. 3 shows the base cup 2, which has a substantially cylindrical shape with a bottom, and its peripheral wall 2.
The diameter of the container body 1 is approximately the same as the outer diameter of the body portion 1b of the container body 1. 21 is a bottom wall, and this bottom wall 2
1 is formed concentrically with the peripheral wall 20, and the container body 1
A pedestal portion 22 that is adhesively fixed to the bottom portion 1a of the device is bent.

Further, the bottom wall 21 is provided with a plurality of discharge holes 24 for discharging hot water that has entered the base cup 2.

Further, in the heat-resistant and pressure-resistant container A according to the present invention, a continuous spiral protrusion 25 is formed on the inner wall 23 of the base cup 2. Therefore, when the base cup 2 is attached, the passage formed by the pair of protrusions 25 extends continuously from the upper edge of the base cup 2 toward the bottom of the base cup 2. The range L in which the protrusion 25 is formed is the inner wall 2 of the base cup 2 when the base cup 2 is attached to the container body 1.
1 and the container body 1 are approximately equal to the contact range.

In this embodiment having the above configuration, the contents are heat sterilized as follows.

First, the contents such as fruit juice and carbonated drink are injected into the container body 1 and sealed with a cap.
Sterilize the contents by showering hot water from above. Most of the hot water sprinkled onto the surface of the container A in a shower falls while traveling along the outer surface of the container body 1 and reaches the upper edge of the base cup 2. An entrance portion 26 of the protrusion 25 is arranged at the upper edge of the base cup 2. The hot water enters the interior through the inlet 26, continues to flow along the outer surface of the container through the passage formed by the container body 1 and the ridges 25, and flows down to the bottom of the container body, and flows down the outer surface of the bottom. The container itself and its contents are sterilized by heating.

In this case, the hot water passes through the spiral passage,
Compared to the case where the hot water just falls downward inside the base cup 2, the time in which it comes into contact with the surface of the container body is longer, and the inside of the container is heated for a longer period of time.
Thereafter, the hot water is discharged to the outside through a drainage hole 24 provided in the bottom wall 21, and new high-temperature hot water is constantly supplied into the base cup 2.

FIG. 4 shows another embodiment of the present invention. According to this embodiment, the entrance portion 26 of the protrusion 25 is formed by a vertical portion 25a extending in the vertical direction.

By configuring the vertical portion 25a at the inlet portion 26 of the protrusion 25, the hot water flowing down from above the container body 1 can easily enter from the protrusion 25 into the passage formed inside the protrusion 25, so that a large amount of hot water is always provided. can supply hot water.

FIG. 5 shows a third embodiment of the heat-resistant pressure vessel of the present invention. According to this embodiment, the protrusions 25 are formed intermittently. In this case, the hot water introduced from the upper edge of the base cup 2 flows down along the protrusion 27 and flows into the lower passage through the groove 28 between the protrusion 27 and the adjacent protrusion 27. Fall. In this way, the hot water gradually moves downward while being prevented from falling suddenly by the ridges 27, so the contact time of the hot water with the container body 1 becomes longer, and the heating time for heating the bottom of the container body 1 becomes longer. become longer. Therefore, the contents at the bottom of the container body 1 can be sufficiently heated as well as the contents at the top of the container body 1.

In this way, the bottom part of the container body 1, which could not be heated in conventional containers, can be heated sufficiently for a longer heating time, and the contents in the vicinity can be completely sterilized by heat. Further, the entire carbonated beverage etc. contained in the container A can be uniformly and evenly sterilized at high temperature.

(Effects of the invention) As described above, in the present invention, when the base cup is attached, a passage is formed between the base cup and the bottom of the container body by the protrusion provided on the inner wall of the base cup. The hot water applied to the surface of the container body is guided into the base cup through the passageway, and the content liquid in the bottom of the container body is heated evenly and uniformly to a high temperature in order to increase the heating time of the bottom of the container body. Since it can be heated, it can be completely sterilized.

Furthermore, since there is no protruding wall as in the prior art, designing of a mold and molding work are facilitated, mass productivity is improved, and production costs can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view showing a first embodiment of the heat-resistant pressure vessel according to the present invention, Fig. 2 is an enlarged sectional view of section C in Fig. 1, and Fig. 3 is the heat-resistant pressure vessel shown in Fig. 1. FIG. 4 is a vertical cross-sectional view showing a second embodiment of the base cup for a heat-resistant pressure vessel, FIG. 5 is a vertical cross-sectional view showing a third embodiment of the base cup for a heat-resistant pressure vessel, and FIG. , FIG. 7, and FIG. 8 are explanatory diagrams showing conventional examples. Explanation of symbols, 1...Container body, 1a...Bottom,
2...Base cup, 20...Peripheral wall, 21...Bottom wall, 24...Discharge hole, 25...Protrusion, 25a...
vertical part.

Claims (1)

[Claims for Utility Model Registration] (1) A heat-resistant and pressure-resistant container having an internally hollow container body whose bottom protrudes in the shape of a hemispherical shell, and a bottomed cylindrical base cup attached to the bottom of the container body, A heat-resistant and pressure-resistant container characterized in that a spiral protrusion is provided on the inner wall of the base cup to introduce hot water poured onto the surface of the container body into the bottom of the container body covered by the base cup. (2) The heat-resistant pressure vessel according to claim 1, wherein the spiral protrusion is continuously formed on the inner wall of the base cup. (3) The heat-resistant pressure vessel according to claim 1, wherein the spiral protrusions are formed intermittently on the inner wall of the base cup.