JPH0340740Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a base cup that is fitted and assembled to the bottom of a biaxially stretched blow-molded AN (acrylic nitrile) resin bottle.

[Conventional technology]

Recently, synthetic resin bottles have been widely used as containers for juice, soy sauce, and the like.

Among them, those made of biaxially stretch blow-molded PET (polyethylene terephthalate) resin are the most commonly used because of their many properties.

However, this PET resin bottle also has a major drawback: it lacks heat resistance. Therefore, for example, it may cause a whitening phenomenon and cause deterioration of the bottle.
It may also make the appearance worse.

Therefore, this biaxially stretched blow molded PET
Resin bottles are suitable for storing things that do not require heat treatment, such as cola, but conversely, they are problematic when used to store things that require heat treatment, such as juice bottles containing fruit juice. remain.

Therefore, instead of PET resin, which has a problem with heat resistance, it is possible to use AN resin, which has excellent heat resistance.

[Problem that the invention attempts to solve]

However, this AN resin also has problems.
This is because, as mentioned above, although this biaxially stretched AN resin has superior heat resistance compared to PET resin, it is brittle and has poor impact resistance.

Furthermore, since this bottle is biaxially stretch blow molded, it is desirable for the bottom wall of the bottle to have a hemispherical shell shape from the viewpoint of molding and the performance of the bottle. Therefore, this bottle whose bottom wall is shaped like a hemispherical shell does not have a self-supporting function.

The present invention was devised in order to solve the above two problems, and aims to provide a base cup that strengthens the impact resistance of the fragile bottom of the bottle and gives the bottle a self-supporting function. shall be.

[Means for solving problems]

In order to achieve the above purpose, the following configuration is adopted.

The base cup 1 for a biaxially stretched blow-molded bottle according to the present invention is a resilient base cup 1 that is fitted and assembled to the bottom of an AN resin bottle 8 that is biaxially stretched blow-molded and has a bottom wall 10 in the shape of a hemispherical shell. And,
A cylindrical body tube 2 whose upper end fits into the lower end portion of the bottle body tube 9 and is assembled, and a bottom plate 3 connected to the lower end of the body tube 2.
It consists of.

The bottom plate 3 is connected to the lower end of the body cylinder 2 and is invertedly curved inwardly, and the leg part 4 is connected from the inner upper end of the leg part 4 in the shape of an inner flange, and the upper surface of the tip part is connected to the bottom wall of the bottle body. 10; and a protrusion 6 that stands up from the upper end of the leg 4 and whose upper end is close to the bottom wall 10 of the bottle 8 when it is fitted and assembled to the bottle 8. It consists of.

Therefore, a hole 1 is formed in the center of the base cup bottom plate 3.
2 is formed.

[Effect]

Since the present invention having the above-mentioned structure is provided with the legs 4, by fitting and assembling them to the bottom of the bottle 8, the bottle 8 can have a self-supporting function.

Furthermore, when an impact is applied to the base cup 1 assembled to the bottle body 8, the resilient base cup 1 acts to weaken the impact force by elastically deforming. The elastic contact portion 5 that is in contact with the bottom wall 10 and has a shape that is most likely to cause elastic deformation is elastically deformed significantly downward, and the upper end surface of the protrusion 6 that is close to the bottom wall 10 of the bottle becomes the bottom wall. It's 10.

This prevents large elastic deformation of the elastic contact part 5 by keeping the force applied to the elastic contact part 5 within a certain level, and prevents the base cup 1 from moving normally against the bottle body 8 due to the large elastic deformation of the elastic contact part 5. This prevents the assembled position from collapsing. In other words, the upper end surface of the protrusion 6 comes into contact with the bottom wall 10, thereby acting as a brake to prevent the bottle 8 from fitting into the base cup 1 beyond a certain level or from shifting from its normal position. This makes the assembly of the bottle body 8 and base cup 1 stable.

[Example] An example of the present invention will be described with reference to the drawings.

This base cup 1 is made of a highly elastic synthetic resin, and is assembled into a bottle body 8 having a cylindrical body 9 and a locking strip 11 for setting the fitting position with the base cup 1. ing.

The gap 13 between the upper end of the protrusion 6 and the bottom wall 10 facing it is such that when a large impact force is applied to the base cup 1 that changes the assembly position with the bottle body 8, the upper end of the protrusion 6 will close to the bottom wall. The size is set to such an extent that the base cup 1 and the bottle body 8 come into contact with each other and prevent the assembly positional relationship between the base cup 1 and the bottle body 8 from changing.

A plurality of protrusions 7 are provided on the inner surface of the resilient contact portion 5, which stabilizes the assembled positional relationship with the bottle 8 by preventing slippage with the bottle bottom wall 10, especially when an impact is applied to the base cup 1. I'm making it a thing.

It is necessary for the elastic contact part 5 to stably support the bottle 8, and therefore, the position of the elastic contact part 5 must be avoided from being biased toward the center or the outer peripheral edge of the bottle 8. Here, it is positioned approximately midway between the center of the bottle 8 and the outer peripheral edge.

In addition, the bent portion of the base cup 1 is curved as a measure to increase impact resistance, thereby preventing the base cup 1 from becoming easily broken due to impact force being concentrated in one place.

[Effect of idea]

In this way, the present invention solves the conventional problems and
This is an excellent base cup that is able to give self-supporting functionality to the AN resin bottle, which is brittle and has poor impact resistance and has a hemispherical bottom that is biaxially stretched, and has improved impact resistance against drops, etc.

[Brief explanation of the drawing]

FIG. 1 is a half-sectional view showing the base cup of the present invention assembled to the bottom of the bottle, and FIG. 2 is an enlarged view of the main part. Explanation of the code, 1: Base cup, 2: Body tube,
3: Bottom plate, 4: Leg section, 5: Elastic contact section, 6: Projection section,
7: Protrusion, 8: Bottle body, 9: Body, 10: Bottom wall, 1
1: Locking strip, 12: Hole, 13: Space.

Claims (1)

[Scope of utility model registration request] Biaxially stretch blow molded with hemispherical bottom wall
AN elastic base cup that is fitted and assembled to the bottom of the bottle body made of AN resin; the bottom plate is connected to the bottom end of the body cylinder and is invertedly curved inward; and the leg part is connected from the inner upper end of the leg part in an inner flange shape, and the top surface of the tip part is connected to the bottom end of the bottle body. It consists of an elastic contact part that comes into elastic contact with the bottom wall, and a protrusion that stands up from the upper end of the leg and whose upper end is close to the bottom wall of the bottle when it is fitted and assembled to the bottle. Base cup for biaxially stretched blow molded bottles.