JPH0712243Y2 - Container with reinforcing ribs - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a container with a reinforcing rib in which a rib for reinforcement is formed on the body of the container.

[Conventional technology]

In recent years, a synthetic resin container has been generally used as a container for soft drinks, and in particular, a so-called PET container has been widely used.

In this PET container, it is relatively easy to make the container thin, but if this is done, the strength of the container will be reduced, so ribs are formed on the container to reinforce it.

By the way, when filling the contents, sterilization of the container is indispensable, a method of simultaneously sterilizing the container by heating the contents to be filled, and after cleaning the inside of the container with a sterilizing solution in advance, There is a method of filling. In the latter case, after washing the inside of the container with the sterilizing liquid, the container is inverted and drained, but at that time, it is ideal that the sterilizing liquid in the container is entirely discharged and not left in the container.

However, there is a close relationship between the rib shape and the residual amount of the sterilizing liquid, and the rib shape and the container strength.

That is, as the test sample, the rib-free container shown in FIG. 3, the lateral rib-formed container shown in FIG. 4, and the vertical rib-formed container shown in FIG. The following results were obtained when the relationship was examined.

First, the results shown in the following table were obtained by comparing the full-pouring volume of water poured up to the rim of each container with the volume of water when the container was immersed in water in that state.

From this table, the capacity difference is 55.06 ml for the ribless container, 48.69 ml for the container with vertical ribs, and 5.6 for the container with horizontal ribs.
It became 1 ml.

The higher the rigidity of the container, the smaller these volume differences,
It is clear that the container having the vertical ribs has a lesser degree of improvement than the container without the ribs, and there is a possibility that the contents may inadvertently overflow when the container is held.

On the other hand, it is clear that the container with the lateral ribs has a very large degree of improvement and the rigidity is remarkably improved.
This indicates that the deflection of the container when holding the side surface of the container can be reduced at the same time.

Here, an experiment was conducted on the relationship between the residual amount of the sterilizing liquid and the shape of the rib. In this experiment, as shown in FIG. 6, the amount of water remaining in each container was measured with each container being inverted. As a result, the residual values of the container without ribs and the container with vertical ribs were 0.43 ml and 0.44 ml, respectively, showing no significant difference and the drainage was good, but 5.72 ml remained with the container with horizontal ribs.

For this reason, it is necessary to reduce the residual amount to the reference value by leaving it in the container having the lateral ribs for a long period of time or applying vibration.

In summary, it has been clarified that the container having the horizontal ribs is excellent in terms of strength of the container, but the container having the vertical ribs is superior in terms of drainage of the sterilizing solution.

Further, in terms of the ease of holding the container, the container having the lateral ribs is less likely to slip, and therefore, the container is not gripped strongly, and thus the holding property is excellent.

[Problems to be solved by the invention]

As described above, there is a trade-off between the strength of the container and the residual amount of the sterilizing liquid in the shape of the rib.

The present invention has been made in view of the above matters, and it is possible to make the strength of the container and the residual amount of the sterilizing liquid compatible with each other
It is a technical problem to provide a container with a reinforcing rib that can prevent slipping when holding the container.

[Means for solving problems]

The present invention has the following configuration in order to solve the above technical problems.

That is, ribs 3 that intersect diagonally with respect to the vertical direction of the container 1 are formed continuously and in multiple stages on the body portion 2 of the container 1, and the container bottom side of each rib 3 swells outward. The container mouth side of each rib 3 was a container with a reinforcing rib as a linear inclined portion 4 protruding inward of the container from the bottom direction toward the mouth direction.

[Action]

The water droplets inside the container are gathered in one direction along the inclination of the ribs 3 and drained at the end of the inclined portion 4 protruding inward from the bottom to the mouth.
The drainage of water when the container is inverted is extremely good.

Also, the strength of the container is as good as that with the horizontal rib.

〔Example〕

An embodiment of the present invention will be described with reference to FIGS. 1 and 2.

The container 1 is formed by blow molding a parison made of polyethylene terephthalate into a rectangular bottle shape, and has a body portion 2 on which a plurality of ribs 3 are continuously formed in the vertical direction.

The rib 3 is formed by intersecting the body portion 2 of the container 1 obliquely with respect to the vertical direction of the container. The rib 3 bulges outward on the container bottom side (upper side in FIG. 2). At the same time, the container mouth side (lower side in FIG. 2) is a linear inclined portion 4 that projects inward from the bottom side of the container 1 toward the mouth side. And this rib 3
Are arranged in 10 steps on the side wall of the container, and the ribs 3 at three locations on the way are widened. The ribs 3 are respectively formed on the four sides of the rectangular container 1 and have an appearance like a so-called shutter.

In the above-described configuration, when sterilizing, the sterilizing liquid is jetted into the container in an inverted state of the container 1, but after the jetting, the sterilizing liquid flows in one direction along the rib 3 as shown by F in the figure, The end 4a of the inclined portion 4 is drained to allow the sterilizing liquid to be discharged more completely. Further, since the inclined portion 4 is formed linearly, it becomes difficult for water to adhere when it is inverted. That is, when the container 1 is turned upside down, the rib 3 acts like a shutter and the drainage becomes good.

In the upright state of the container 1, the outer lower portion of the rib 3 is a downward step, and when the container is gripped, this serves as a stopper. Further, since the upper portion of the rib 3 is a linear inclined portion unlike the lower portion of the rib 3, the user's hand can deeply enter the lower portion of each rib 3 when gripping the container. Therefore, the holding force of the container is small, and the deformation of the container can be reduced, so that the contents do not overflow.

[Effect of device]

According to the present invention, the drainage of water after washing the inside of a container with a sterilizing liquid can be made better than that of a container having a lateral rib. In addition, since the inclined portion 4 of each rib 3 is formed linearly, water is unlikely to adhere to the rib 3 and drainage can be further improved.

Moreover, when the container 1 is in the upright state, the bulging portion on the bottom side of the rib 3 forms a downward step, and the inclined portion 4 on the mouth side.
Is linear, the user's finger can securely grasp the container below the bulging portion with a slight force. Therefore, the deformation of the container can be reduced, and the contents can be prevented from overflowing carelessly.

[Brief description of drawings]

FIG. 1 is a side view of a container showing an embodiment of the present invention, FIG. 2 is a partial sectional view in an inverted state, FIGS. 3 to 5 are side views showing a conventional container, and FIG. 6 is an experimental state. It is a side view. 1 ... Container, 2 ... Body part, 3 ... Rib, 4 ... Inclined part.

Claims (1)

[Scope of utility model registration request] 1. Ribs 3 which intersect diagonally to the vertical direction of the container 1 are formed continuously and in multiple stages on the body 2 of the container 1, and the bottom side of each rib 3 bulges outward. In addition, the linear inclined portion 4 is formed so that each rib 3 projects toward the container inner side from the bottom direction toward the mouth direction on the container mouth side.
A container with a reinforcing rib, characterized in that