JPS644661Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a cylindrical synthetic resin bottle made by blow molding. The purpose of this is to reduce the local concentration of deformation and ensure ease of holding when pouring out liquid, etc.

Nowadays, from the perspective of emphasizing the aesthetic appearance,
For example, square prism-shaped synthetic resin bottles are now widely manufactured, and by providing a concave part in the peripheral wall of the body, it is possible to provide a more aesthetically pleasing appearance as well as to make the bottle easier to hold. Improvements have been made in this area.

FIG. 1 is a cross-sectional view showing an example of such a conventional synthetic resin bottle. When negative pressure is generated due to a change in volume due to cooling of the liquid stored inside the bottle, Here, the bottom wall of the recess provided in the generally planar, wide peripheral wall portion of the rectangular prism-shaped bottle body is the same as the bottom wall of the recess provided in the approximately planar, narrow peripheral wall portion. It was extremely unsightly, as the inward deformation was significant compared to the bottom wall.

In particular, as shown by the imaginary line in FIG. 1, the bottom wall of the wide recess was deformed to a much greater degree than the bottom wall of the narrow recess, and there was even a risk that the entire bottle would become distorted and difficult to hold.

The present invention was devised to eliminate the drawbacks and inconveniences of the synthetic resin bottle described above, and in particular, by providing reinforcing grooves and reinforcing protrusions around the wide recess, the amount of deformation is minimized. It is designed to be held small, and one embodiment thereof will be described below with reference to the drawings.

As shown in FIGS. 2 and 3, in the body 2 of the bottle body 1 made of synthetic resin by blow molding, the widths of the front wall 3 and the rear wall 4, which are the peripheral walls, are larger than the width of the side wall 5. It has a rectangular prism shape with each wall surface being substantially planar.

In addition, in the front wall 3 and rear wall 4 portions, two approximately square-shaped recesses 6 having a wide width are formed vertically adjacent to each other in accordance with the width thereof, and in the side wall 5 portion, Two elongated substantially rectangular recesses 7 with a small width are formed vertically adjacent to each other in accordance with the width,
The bottom walls 6a, 7a of each of the recesses 6, 7 are planar, occupying almost the entire width and length of the front wall 3, rear wall 4, and side wall 5, respectively.

A reinforcing ridge 8 is provided along the outer shape of the recess 6 on the peripheral edge of the bottom wall 6a in the wide recess 6 provided in the front wall 3 and rear wall 4.
are connected to the front wall 3 and rear wall 4, which are the peripheral wall portions, via reinforcing grooves 9.

In the bottle body 1 in the illustrated embodiment, the front wall 3 area of the body 2 has a flat square prism shape in which the width of the rear wall 4 and the side wall 5 are different. Since the horizontal width of each surface is large, if the bottom wall 6a of each recess 6 undergoes large deformation as described above due to negative pressure, all of the wide recesses 6 are It would be better to provide a reinforcing ridge 8.

In addition, when the cross-sectional shape of the body section 2 is approximately elliptical and is composed of a front wall 3 and a rear wall 4, each of which is gently curved, and when forming the recess 6 as described above, each bottom wall 6a is The above-mentioned protrusion 8 may be provided.

The bottle according to the present invention has the structure as described above.

Therefore, even if negative pressure is generated within the bottle body 1 having a rectangular prism-shaped body, the bottom wall 6a within the wide recess 6, which is most susceptible to the negative pressure, is reinforced around the periphery along the contour of the recess 6. Since the protrusions 8 and reinforcing grooves 9 are provided, the bottom wall 6 as shown by the imaginary line in FIG.
The deformation width of a is small, and therefore is almost the same as the amount of deformation of the bottom wall 7a of the narrow recess 7.

That is, by providing the reinforcing ridges 8 in the wide recess 6, the substantially flat portion of the flat bottom wall 6a of the wide recess 6 becomes almost the same as the bottom wall 7a of the recess 7. Therefore, both recesses 6 and 7 Almost the same amount of deformation will be borne, thereby preventing deformation from concentrating on the recessed portion 6.

Furthermore, since the reinforcing protrusions 8 and the reinforcing grooves 9 are formed by bending and deforming the peripheral wall of the bottle, they increase the rigidity of each recess 6 and deform the peripheral edge and bottom wall 6a itself. For this reason, each recess 6 deforms in such a way that the entire bottom wall 6a sinks into the bottle, while maintaining the shape of its bottom wall 6a. The resulting deformation will occur over a wide range without being noticeable.

Therefore, according to the present invention, even if a wide recess is provided in the peripheral wall of a synthetic resin bottle, the bottom wall of the recess will be significantly deformed inward due to the negative pressure generated inside. The bottle has a good appearance and is easy to hold, and the present invention is excellent and effective.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a conventional bottle, FIG. 2 is a perspective view of a bottle according to the present invention, and FIG. 3 is a cross-sectional view of the same. 1...Main body, 6...Wide recess, 6a...Bottom wall,
8... Reinforcement protrusion, 9... Reinforcement groove.

Claims (1)

[Scope of utility model registration request] The trunk has a rectangular columnar body, and at least two recesses each having a planar bottom wall are formed in a wide peripheral wall portion and a narrow peripheral wall portion of the trunk so as to occupy almost the entire area of the peripheral wall portion. A reinforcing protrusion and a reinforcing groove are provided along the outline of the recess on the bottom wall peripheral edge of the recess in the wide peripheral wall portion, and the reinforcing protrusion is a reinforcing groove. A synthetic resin bottle connected to the peripheral wall portion via.