JPH0447052Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention relates to the structure of a pressure-resistant bottle made of synthetic resin for storing carbonated beverage liquid. The purpose is to attach and detach the cap.

[Conventional technology]

Recently, synthetic resin bottles have been used instead of glass bottles as pressurized bottles for storing carbonated drinks such as beer and cider due to the cost, handling, safety, and design effects of the bottle itself. are becoming widely used.

In the case of this synthetic resin pressure bottle, it is necessary to have sufficient mechanical strength to exhibit high internal pressure resistance, so it is molded without exception by biaxial stretch blow molding and is subjected to concentrated internal pressure. The bottom part has a special shape that makes it easy to move, increasing the internal pressure resistance of this bottom part.

[Problem that the invention attempts to solve]

However, in this type of pressure bottle, the internal pressure is concentrated not only at the bottom but also at the shoulder where the wall structure is inverted, at the connection between the body and the mouth of the bottle body. A relatively large internal pressure is concentrated on this shoulder, but in the past, no efforts were made to increase the mechanical strength of this shoulder.

This results in a lack of mechanical strength against the internal pressure of the shoulder, which cannot be said to be formed by receiving a sufficient amount of stretching.In order to compensate for this lack of mechanical strength, The wall thickness of the part was set to a large value in advance.

In this way, the lack of mechanical strength in the shoulder part of the bottle being molded is compensated for by increasing the wall thickness of this shoulder part, which reduces the amount of expensive synthetic resin consumed to mold one bottle body. There was a problem in that the amount of material was increased and the price of the pressure bottle as a commercial product was unnecessarily high.

Also, since this type of bottle body is relatively large,
It is convenient to have an overcap on the bottle body that can be used as a cap.

The present invention was devised to solve the problems in the conventional example described above, and includes structurally increasing the amount of extension of the shoulder, and detachably attaching an overcap to the shoulder. This is a technical issue.

[Means for solving problems]

Hereinafter, the present invention will be explained with reference to the drawings showing one embodiment of the present invention.

The means according to the present invention is a bottle body made of a synthetic resin such as polyethylene terephthalate resin and made of a biaxial stretch blow molded bottle body 1 for storing a pressurized carbonated beverage liquid, and an overcap 16, and a shoulder part 5. A plurality of bulges 6 are bulged outwardly at intervals along the circumferential direction on the truncated conical shoulder 5', and the lower end of the bulge piece 6 is It has a shape that rises sharply from the shoulder wall 5', and has a recess 7 at the boundary between the lower end of the bulging piece 6 and the shoulder wall 5'.
The present invention has the following features: The overcap locking portion has a bottomed cylindrical overcap 16 that goes over the bulging piece 6 and engages with the recess 7.

[Effect]

As mentioned above, the present invention has a shoulder wall 5' having almost the same structure as the shoulder wall constituting the shoulder of a conventional pressure bottle of this type, and a plurality of expansions spaced apart along the circumferential direction. Since the projecting piece 6 is provided in a bulging manner, the shoulder portion 5 has a wall structure with severe irregularities along the circumferential direction, but this increases the length of the shoulder portion 5 along the circumferential direction. Therefore, when the bottle body 1 is subjected to biaxial stretch blow molding, the shoulder portion 5 is molded in a sufficiently stretched state along the circumferential direction.

That is, since most of the surface of the shoulder portion 5 is formed by the shoulder wall 5' excluding the bulging piece 6, the shoulder wall 5' is stretched so that it has the maximum amount of stretching that can be obtained from its structure. The diameter is set to be approximately the same as that of a normal pressure bottle, and therefore, the amount of stretching of the entire shoulder wall 5' is the amount of stretching obtained by normal means, plus the amount of stretching for bulging the bulging piece 6. It becomes the added value.

In addition, in the present invention, the overcap 16, which can be used as a pot cap, is put in an inverted position and placed over the bottle body 1, and the locking part formed on the inner periphery of the lower end, which is the opening, is passed over the bulging piece 6 to form the recess 7. It is removably assembled to the bottle body 1 by being engaged with it. This overcap 16 is particularly convenient when drinking the liquid inside the bottle body 1 outdoors.

When the overcap 16 is removably engaged with the bottle body 1, the locking portion of the overcap 16 passes over the bulging piece 6 and engages with the recess 7 located directly below the bulging piece 6. Therefore, the engagement and assembly of the overcap 16 with the bottle body 1 is stably achieved and maintained, and the lower end portion as an opening, which is the part where the overcap 16 is assembled with the bottle body 1, is aligned with the outer periphery of the bottle body 1. It does not protrude significantly from the surface.

〔Example〕

In the case of the illustrated embodiment, the bottle body 1 has a structure in which a mouth barrel part 2 is connected to the upper end of a body part 8 having a bottom part 9 via a shoulder part 5, like a normal bottle body. A thread 3 and a collar piece 4 are provided on the outer circumferential surface of the mouth tube portion 2 .

Six bulging pieces 6 are provided at equal intervals, and their upper ends are gently continuous with the shoulder wall 5', but their lower ends rise sharply from the shoulder wall 5'. A recess 7 is formed at the boundary between the lower end of the bulging piece 6 and the shoulder wall 5', and the lower end of the shoulder wall 5', which is the lower end of the recess 7, has a bulging shape. The diameter is larger than the hypothetical circle connecting the protruding ends of the pieces 6.

The overcap 16 has an outer circumferential surface extending upwardly from the outer circumferential surface of the body section 8, as shown by the two-dot chain line in FIG. In an inverted position, the bulging piece 6 of the locking part, which has a substantially truncated conical shape and is provided in a circumferential strip shape on the inner periphery of its opening, can be smoothly overcome. The entire body is thinly molded from synthetic resin.

Therefore, when the overcap 16 is assembled by covering the bottle body 1, the overcap 16
Since the locking part provided on the inner periphery of the opening enters into the recess 7 and engages with it, the opening end surface of the overcap 16 faces the lower end of the recess 7.
As a result, the outer circumferential surface of the assembled overcap 16 can be positioned on the upwardly extending surface of the outer circumferential surface of the body 8, and the entire bottle body with the overcap 16 assembled on the bottle body 1 can be The appearance can be made simple and stylish.

The bottom part 9 of the bottle body 1 has five inverted uprights arranged at equal intervals around a center 15 which is the lowest position of the spherical arc bottom wall 10 which bulges downward in a hemispherical arc shape. A leg piece 11 with a bottom wall connected to a truncated triangular pyramid wall 12
The bottom surface of this leg piece 11 is connected to a flat bottom surface 13 located outwardly, and is continuously located inside this flat bottom surface 13 and slightly rises toward the center 15. It is composed of an inclined bottom surface 14.

Since the bottom portion 9 of the bottle body 1 has the above-described structure, the amount of stretching of the bottom portion 9 during stretch forming can be increased, and the rising wall portions forming each leg piece 11 function as reinforcing ribs. Therefore, it exhibits high structural resistance to internal pressure. In addition, the inclined bottom surface 14 of the bottom surface of the leg piece 11
is formed in an inclined position in advance, so even if the bottom part 9 bulges downward due to the action of internal pressure, the inclined bottom surface 14 will not protrude below the flat bottom surface 13. Even if the bottom part 9 undergoes bulging deformation due to internal pressure, the self-supporting function of the flat bottom surface 13 can be reliably and stably ensured, thereby ensuring a good and stable "sitting" of the bottle body 1. be able to.

[Effect of idea]

As is clear from the above explanation, the present invention has two
Since the shoulder part of the axial stretch blow molded bottle body can be molded with a sufficient amount of stretching, the physical strength of the shoulder part can be increased, and this makes it possible to improve internal pressure resistance as a pressure bottle. It can be made extremely high, and the appearance of the shoulder can be changed by the shaped bulge piece, so the overall design appearance of the bottle body can be made interesting, and the shoulder can be made very high. The overcap, which can be used as a pot, can be removably and stably attached to the bulge formed on the part, which provides excellent practicality, especially when drinking the liquid inside the bottle outdoors. Furthermore, when the overcap is attached to the bottle body, the lower end of the overcap does not protrude significantly from the outer surface of the bottle body, so the overall appearance of the bottle with the overcap attached to the bottle body is simplified. It exhibits excellent effects, such as being able to make it look good.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view showing an embodiment of the present invention. FIG. 2 is a plan view of the embodiment shown in FIG. 1. FIG. 3 is a bottom view of the embodiment shown in FIG. Explanation of symbols, 1...Bottle body, 2...Mouth part, 3...
...screw, 4... collar piece, 5... shoulder, 5'... shoulder wall,
6...Bulging piece, 7...Concave part, 8...Body part, 9...
Bottom, 10... Spherical arc bottom wall, 11... Leg piece, 12...
... Triangular truncated pyramid wall, 13 ... Flat bottom surface, 14 ... Inclined bottom surface, 15 ... Center, 16 ... Overcap.

Claims (1)

[Scope of utility model registration request] The bottle body consists of a bottle body 1 for storing a pressurized carbonated beverage liquid made of synthetic resin such as polyethylene terephthalate resin and made of biaxial stretch blow molding, and an overcap 16, and the shoulder part 5 is shaped like a truncated cone. A plurality of bulging pieces 6 are provided on the bent shoulder wall 5' at intervals along the circumferential direction so as to protrude outward.
The bottle has a shape in which the lower end of the bulging piece 6 rises sharply from the shoulder wall 5', and a recess 7 is formed at the boundary between the lower end of the bulging piece 6 and the shoulder wall 5'. A pressure-resistant bottle comprising a main body 1 and an overcap 16 having a bottomed cylindrical shape, the overcap locking portion of which crosses over the bulging piece 6 and engages with the recess 7.