JPS5850726Y2 - Support structure for synthetic resin containers - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a synthetic resin container for storing, transporting, storing, etc. bottles for beer, soft drinks, vegetables, etc.

Generally, containers such as those described above are used by stacking them in several tiers, so they must have a structure that can sufficiently withstand the load.

Therefore, the supports at the four corners of the container have a double wall structure,
This is formed integrally with the four surrounding side walls, and a structure is used in which a window or a hole for a handle is provided in the upper part of the side wall.

FIG. 1 is a perspective view of the container as described above, in which 11 is the support at the four corners, 2 is the side wall, 3 is the handle with a U-shaped cross section, 4 is the window, and 5 is the side wall.
is the upper opening.

As shown in FIG. 2, the support column 1 includes, following the side wall 2, a corner wall 6 with a radius at each corner, and a substantially triangular cross-sectional shape on the outside of each corner wall 6. It has a so-called double wall structure in which the outer wall 7 is formed integrally with the side wall 2, the upper flange 8, and the lower flange 9 with a space provided therebetween.

The pillars of conventional containers of this type have the following problems.

That is, in FIG. 2, the joint A of the side wall 2, corner wall 6, and outer wall 7 is thick, and the shrinkage of the joint A becomes large due to the nature of the synthetic resin.

Therefore, the support column contracts in the direction of the arrow, and due to this difference in shrinkage rate, the side wall 2 and the walls 6 and 7 forming the support column have curved surfaces and are smooth (vertical) surfaces, as shown in FIG. I couldn't.

In addition, in order to prevent deformation due to differences in shrinkage rates, if the mold is sufficiently cooled before releasing it from the mold, the shrinkage will press the mold, making it even worse to release the mold, causing large residual stress and further deformation. It causes.

Furthermore, when it is desired to increase the width of the side wall 2 in order to increase the printing area on the side wall 2, as shown in FIG.
L2 may be used, but if this is done, the width of the external wall 7 will be l 1 > l 2 , and the cross-sectional area of the support column will be small, resulting in poor load resistance.

Furthermore, if the corner walls and external walls are made thicker to increase the load-bearing capacity of the struts, not only will formability deteriorate;
This increases the weight and costs.

On the other hand, if the outer wall 7 is formed following the side wall 2 and the corner wall 6 is bulged inward as shown in FIG. 5, the outer wall 7 can also be used as a printing surface, so the printing area can be reduced. Although it can be made wider and the above-mentioned problem can be solved, the side wall 2 and the outer wall 7 are smooth surfaces, so there is a drawback that the printed surface is scratched.

In addition, in both the configurations shown in FIG. 4B and FIG. However, the corner portions are easily damaged, and the design is not consistent with conventional products.

The present invention aims to eliminate the above-mentioned drawbacks and provide a container with a simple structure, excellent load resistance, and no change in design or appearance.

The present invention will be described below based on illustrated embodiments.

FIG. 6 is a partially sectional view showing the strut structure according to the present invention, and is an enlarged view showing the same state as FIGS. 4 and 5.

As is clear from the figure, the corner wall 6 consists of a rounded part 6a and sloped parts 6a formed at both ends thereof, and the sloped part 6b is connected to the side wall 2, while the external wall 7 is connected to a corner part 7a. , and an end wall 7b which is continuous with a stepped portion 12, and the end wall 7b is formed as an extension of the side wall 2, and the connection portion between the end wall 7b and the side wall 2 forms a smooth surface.

Therefore, the inclined portion 6b, the end wall 7b, and the side wall 2 are connected to each other with a substantially Y-shaped (or inverted Y-shaped) cross-sectional shape.

Further, the face portion 6b can disperse external impact, and it is most preferable that the inclination angle α between the inclined portion 6b and the side wall 2 is 45°±5°.

The present invention can achieve the following effects by making the support section of the container have a simple structure as described above.

(1) The side wall 2 is located inside both ends of the corner part 7a and the rounded part 6a, that is, the corner part 7a and the rounded part 6
Since the structure is such that the structure is located between a and a, the stress is dispersed, so that the shrinkage during molding occurs uniformly, and the side walls and pillars can be made into smooth (vertical) surfaces without deformation.

(2) Since the support portion 1 and the side wall 2 do not deform, it is easy to release the mold from the mold, and since the mold can be cooled sufficiently, a high quality product can be obtained.

(3) The outer wall 7 consists of an end wall 7b which is continuous with a corner part 7a and a step part 8, and the connecting part between the end wall 7b and the side wall 2 is a smooth surface, so the end wall 7b is Since it forms part of the side wall 2, the printing area can be increased accordingly.

That is, compared to the width dimension L1 of the conventional printing area, the width dimension L2 of the printing area according to the present invention can be set to Ll<L2.

(4) With the above configuration, although the printing area is increased, the cross-sectional area of the support pillar is not reduced, so the strong part of the support support is not weakened.

In addition, since the width L1 of the conventional external wall and the width L1 of the corner part 7a of the external wall according to the present invention can be configured to be the same, there is an advantage that all can be unified with the conventional product without changing the appearance. be.

(5) Since the corner wall 6 has a corner portion 6a and an inclined portion 6b, breakage resistance is improved.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing a conventional synthetic resin container, Fig. 2 is a partially omitted sectional view taken along line XX in Fig. 1, Fig. 3 is a sectional view similarly showing a deformed state, and Fig. 4 A is FIG. 1 is a cross-sectional view taken along the line XX, FIGS. 4B and 5 are explanatory cross-sectional views, and FIG. 6 is a cross-sectional view of the support column according to the present invention. 1... Strut part, 2... Side wall, 3...
...Handle portion, 4...Window, 5...Top opening, 6...Corner wall, 6a...Round portion, 6b... ... Slope part, 7 ... External wall, 7a ... Corner part, 7b ... End wall, 12 ... Step part.

Claims (2)

[Scope of utility model registration request] (1) Each corner wall 6 is provided where the four corner pillars continue to the side wall 2, and a space with a substantially triangular cross section is provided outside each corner wall 6, so that the external wall 7 is connected to the side wall 2. In the integrally formed synthetic resin container, the corner wall 6 is composed of a rounded part 6a and inclined parts 6b formed at both ends thereof, and the outer wall 7 is continuous by a corner part 7a and a stepped part 12 at both ends thereof. A support structure for a synthetic resin container characterized by comprising an end wall 7b. (2) Angle α between the side wall 2 and the inclined portion 6b forming the corner wall
The strut structure for a synthetic resin container according to claim 1, wherein the angle is 45°±5°.