JPH0642973Y2 - 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 a test sample, a rib-free container shown in FIG. 5, a container having horizontal ribs shown in FIG. 6, and a container having vertical ribs 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, the amount of water remaining in each container was measured with each container being inverted as shown in FIG. 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 container with lateral ribs remained 5.72 ml.

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 the 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, the ribs 4 extending over the first side surface 2 of the rectangular container 1 and the second side surface 3 adjacent to the first side surface 2 are formed continuously and in multiple stages in the vertical direction of the container 1 to form a first rib. The rib group.

Ribs 6 extending over the second side surface 3 of the container 1 and the third side surface 5 adjacent to the second side surface 3 are formed continuously and in multiple stages in the vertical direction of the container 1 to form a second rib group. To do.

Then, the rib 8 extending over the third side surface 5 of the container 1 and the fourth side surface 7 adjacent to the third side surface 5 is formed continuously and in multiple stages in the vertical direction of the container 1 to form a third rib. Group.

Further, ribs 9 extending over the fourth side surface 7 of the container 1 and the first side surface 2 adjacent to the fourth side surface 7 are formed continuously and in multiple stages in the vertical direction of the container 1 to form a fourth rib. The rib group.

The first to fourth rib groups are interdigitated with adjacent rib groups, and the inner surface of each rib is tapered so as to project inward from the bottom to the mouth of the container. Both ends of each were inclined toward the bottom of the container 1 to obtain a container with reinforcing ribs.

[Action]

Water droplets inside the container are gathered in one direction along the inclination of the ribs 4, 6, 8, 9 and drained at the end of the taper that projects inward from the bottom to the mouth. Draining water when inverted is extremely good.

Further, the ribs having different directions complement each other to improve the strength of the container.

〔Example〕

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

The container 1 is formed by blow molding a parison made of polyethylene terephthalate into a rectangular bottle shape, and four surfaces thereof are a first side surface 2, a second side surface 3, a third side surface 5, and a fourth side surface 7, respectively. .

On the first side surface 2 of the container 1 and on the second side surface 3 adjacent to the first side surface 2, ribs 4 straddling the first side surface 2 are formed continuously and in multiple stages in the vertical direction of the container 1, These are the first rib group.

Further, the second side surface 3 of the rectangular container 1 and the second side surface 3
The ribs 6 extending over the side surfaces adjacent to the third side surface 5 are formed continuously and in multiple stages in the vertical direction of the container 1, and these ribs form a second rib group.

Similarly, ribs 8 extending over the third side surface 5 of the rectangular container 1 and the fourth side surface 7 adjacent to the third side surface 5 are formed as a third rib group, and the fourth side surface is also formed. 7 and a rib 9 extending over the first side face 2 adjacent to the fourth side face 7 to form a fourth rib.
It is as a rib group.

In the first to fourth rib groups, the inner surfaces of the respective ribs 4, 6, 8, 9 are tapered so as to project inward from the bottom to the mouth of the container 1 as shown in FIG. As a result, the ribs arranged vertically have a so-called shuttered door appearance, and are interlaced with adjacent rib groups on the side surface of the container.

Both ends of each of the ribs are inclined toward the bottom of the container 1, and the tips are curved 90 degrees toward the bottom.

In the above-described configuration, when sterilizing, the sterilizing solution is ejected into the container in an inverted state of the container 1, but after the ejection, the sterilizing solution is applied to the respective ribs 4, 6, 8, 9 as shown by F in the figure. While flowing in a specific direction along with it, water is drained at the taper end T, so that the sterilizing liquid can be more completely discharged.
That is, when the container 1 is turned upside down, the ribs 4, 6, 8 and 9 act like a shutter and the drainage becomes good.

In the upright state of the container 1, the outside of the rib 3 forms a downward step, and when the container is grasped, this serves as a stopper. 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.

Moreover, when the container 1 is in the upright state, the rib forms a downward step, so that the container can be gripped with a slight force. Therefore, the deformation of the container can be reduced, and the contents can be prevented from overflowing carelessly. In addition, since the ribs having different directions complement each other, the strength of the container is improved.

[Brief description of drawings]

FIG. 1 is a side view of a container showing an embodiment of the present invention, FIG. 2 is a perspective view, FIG. 3 is a plan view, FIG. 4 is a partial sectional view in an inverted state, and FIGS. FIG. 8 is a side view of the test sample used as an example, and FIG. 8 is a side view of the experimental state. 1 ... container, 2 ... first side surface, 3 ... second side surface, 4,6,8,9 ... rib, 5 ... third side surface, 7 ... fourth side surface.

Claims (1)

[Scope of utility model registration request] 1. Ribs 4 extending over a first side surface 2 of a rectangular container 1 and a second side surface 3 adjacent to the first side surface 2 are formed continuously and in multiple stages in the vertical direction of the container 1. The first rib group is formed with ribs 6 extending continuously over the second side surface 3 of the container 1 and the third side surface 5 adjacent to the second side surface 3 in the vertical direction of the container 1. To form a second rib group, and ribs 8 extending over the third side surface 5 of the container 1 and the fourth side surface 7 adjacent to the third side surface 5 are formed continuously and in multiple stages in the vertical direction of the container 1. To form a third rib group, which is the fourth rib of the container 1.
Ribs 9 extending over the side surface 7 and the first side surface 2 adjacent to the fourth side surface 7 are formed continuously and in multiple stages in the vertical direction of the container 1 to form a fourth rib group, The fourth rib group is interlaced with the adjacent rib group, and the inner surface of each rib is tapered so as to project inward from the bottom to the mouth of the container, and both ends of each rib are A container with a reinforcing rib, characterized in that the part is inclined toward the bottom of the container 1.