JPH0417465Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a plastic molded container, particularly a cup-shaped or deep-dish-shaped packaging container for packaging curry, stew, and other foods.

[Prior Art] As containers for packaging curry, stew, other foods, etc., containers formed into cup or deep dish shapes by sheet molding or the like are used.

Sheet-molded containers are made by pressing a softened sheet of plastic material against a mold using vacuum or pressure to form a container with a substantially uniform wall thickness, which is convenient for stacking a large number of empty containers.

These molded containers are filled with cooked or semi-cooked foods using automated machines, and consumers can heat the containers or use them as tableware.

In order to enable automatic filling of such containers in a filling machine, the containers must be stacked in the same position and at equal intervals (stacking height).
This means that containers that have been stored in stacks,
When the containers are separated one by one by a machine during filling, the claws of the machine are inserted into the gaps between the flanges of the stacked containers, and only one container at the top is removed one after the other. As you do,
In other words, it is necessary to stack them so that the stacking height is d; otherwise, multiple pieces may be removed all at once (blocking).
This is because there is an inconvenience that none of the pieces may be removed and the pieces may fall.

In order to enable such proper stacking, conventional sheet molded containers are
As in a container 101 shown in FIGS. 6 and 7, an annular stepped portion 102 is provided around the upper outer periphery of the side wall of the container. The stepped portion 102 has an inner diameter smaller than the diameter R of the top opening of the container and an outer diameter larger than the diameter R. Therefore, the diameter of the lower side wall 103 bordering on the stepped portion 102 is smaller than the diameter R of the top opening of the container, but the outer diameter is smaller than the diameter R of the top opening of the container. is greater than R so that only the side wall 103 is inserted into the lower container 101 and the step 1
02 as a positioning stopper, the upper container 10
1 protrudes from the upper surface of the lower container 101 by a height d.

In the side wall 103, the axis 10 of the container
The diameter increases upward in 7 directions, and the inclination angle θ with the axis 107 is 5° to 10°.
is being used.

As shown in FIG. 7, when containers 101 with a predetermined wall thickness are stacked and the stacking height is set to a predetermined value d, the distance between the side walls of the upper and lower adjacent containers is 103.
If there is insufficient clearance, the containers will fit tightly into each other, and even if you pull one of the stacked ends, the other container will stick together, which will easily cause blocking. This is because even if the clearance is too large, the following disadvantages will occur.

[Problem to be solved by the invention] On the other hand, the container 1 with a large θ shown in FIGS. 8 and 9
As shown in FIG. 10, which shows the case where containers 11 are stacked, if the clearance is too large, even if the horizontal positions of the overlapping portions of the upper and lower containers shift slightly during stacking, there will be no wall to restrict each other. Due to the weight of the upper container, etc., that part gradually shifts, one side 111a sinks, and the opposite side 111b rises, and the flange spacing becomes smaller on one side than the predetermined spacing d, and on the other side. It becomes larger on the side of , and the direction of the axis 107 is also deviated, so that it swings and cannot be stacked correctly. Also, even if the item is properly stacked, it will swing with the slightest amount of momentum.

However, with the recent diversification of lifestyles, the uses and designs of containers have also diversified, and there are cases where it is desired to have a large surface opening area for the container. , or may exceed 30°.

In such a container where the side wall has a large inclination angle θ with respect to the axis, the clearance between the side walls of the upper and lower containers for the same wall thickness and stacking height d is greater than when the inclination angle θ is 5° to 10°. The problem is that it becomes much larger and the swing described above is more likely to occur. In addition, containers generally require alignment with the lid, and it is desired to develop containers that can be stacked so that they do not shift in position not only in the horizontal direction but also in the circumferential direction.

This idea was made in view of the above circumstances, and the angle of inclination of the side wall of the container with respect to the axis is 15°.
In a large container such as above or 30° or above,
It is an object of the present invention to provide molded containers that can be stacked at a desired stacking height, can be easily separated from each other, and can prevent both horizontal displacement (swing) and circumferential displacement.

[Means for Solving the Problems] In response to this object, the molded container of this invention is a molded container in which the container body has a weight surface portion whose diameter increases in the axially upward direction. It has a rising surface portion whose diameter decreases and a locking surface portion whose inner diameter is smaller than the diameter r of the open end and whose outer diameter is larger than the diameter r of the open end and is connected to the lower end of the rising surface portion at the outer edge. It consists of a stacking step part that goes around the container, and an outer surface part consisting of a lower surface part, a side part, and a different slope part whose inclination angle is smaller than the weight surface part with respect to the central axis of the container, and the bottom part of the stacking step part below the weight surface part. The container body is characterized by having a plurality of protrusions along the circumference, each of which is formed by bulging outward on both the inner and outer surfaces.

[Function] When the molded containers 1 configured in this way are stacked one on top of the other, the stacking step of the lower molded container comes into contact with the lower surface of the stacking step of the upper molded container 1, and the stacking height d increases. is ensured. At this time, the protrusion functions as a guide surface for alignment. In addition, swinging is prevented by interference between the overlapping portions of the upper and lower protrusions of the molded container.

[Example] The details of this invention will be explained below with reference to the drawings showing one example.

In Figures 1, 2, 3 and 4,
1 is a molded container. The molded container 1 is a sheet molded container, in which a sheet of synthetic resin is softened and pressed against a mold using vacuum or compressed air to form the container body 2.
It is a container with an open top end, in which a flange portion 3 and a flange portion 3 horizontally connected to the top end of the container body portion 2 are integrally molded. The container body 2 has a conical surface 4, a protrusion 11, and a stacking step 6 on its side surface.

The conical surface portion 4 has a conical surface 8 whose diameter increases upward in the direction of the axis 7, and a cross section in an imaginary plane including the axis 7 is inclined at about 30 degrees with respect to the axis 7.

A circular bottom 10 is connected to the lower end of the conical surface portion 4 to close the lower end.

The protruding portions 11 are formed at a plurality of locations along the circumference of the upper end of the conical surface portion 4 at positions that equally divide the entire circumference.
It forms a part of the container body 2. Projection 11
consists of a different slope portion 5, a lower surface portion 12, and a side surface portion 13. The different slope portion 5 is perpendicular to the imaginary plane passing through the axis 7, and its diameter increases upward in the direction of the axis 7, similar to the conical surface portion 8. is 5° to 10° to axis 7
It is important that the angle of inclination is smaller than that in the conical section 4. Further, the depth of the differently inclined portion 5 in the direction of the axis 7 is _h1 .

At its upper end, the protruding part 11 has approximately the same diameter as the adjacent parts on the left and right, and is substantially flush with it, and is in contact with the inner edge of the stacking step part 6, which will be described later. It protrudes outward from the adjacent left and right conical surface portions 4, and its lower end is connected to the lower conical portion 4a by a lower surface portion 12 forming a substantially horizontal wall, and is connected to the left and right conical portions by side portions 13. The different slope portion 5, the lower surface portion 12, and the side surface portion 13 form a protrusion 11 that protrudes from the conical surface portion 4.

A stacking step 6 is formed at the upper end 11a of the protrusion 11 and at the portion of the conical surface 4 where the protrusion 11 is not formed, connected to the upper end 4c. That is, the stacking step part 6 has a horizontal annular shape or a locking surface part 14 that rapidly increases in diameter upward in the direction of the axis 7 and projects outward in an annular shape;
and a rising surface portion 15 that is connected to the outer edge of the stacking surface and rises by a height of stacking height d. The rising surface portion 15 has a conical surface whose diameter slightly decreases upward in the direction of the axis 7, and whose upper end diameter r is the diameter of the opening end of the container 1.
is larger than the inner diameter of the locking surface portion 14 but smaller than the outer diameter.

The inner end of the locking surface portion 14, that is, the inner end of the stacking step portion 6, is connected to the upper end of the protruding portion 11.
Further, a horizontal flange portion 3 projects outward from the upper end of the rising surface portion 15.

When the molded containers 1 configured in this way are stacked one on top of the other with the protrusions 11 aligned, the upper container 1
The protruding part 11 is not prevented from entering the container body 2 of the lower container, and the flange inner edge 3a of the lower molded container is in contact with the lower surface of the locking surface part 14 of the upper molded container 1, The rising surface portion 15 and flange portion 3 of the upper forming container 1 are exposed from the lower forming container 1 and stacked at a stacking height d. At this time, the side surface portion 13 acts as a guide surface for alignment.
Also, it is important to note here that in the overlapping portion 5b of the differently inclined portions 5, the lower portion 5a of the lower depth h ₁ -d of the differently inclined portion 5 of the upper container is different from the different inclined portion of the lower container. 5 overlaps with the upper part 5b of depth h ₁ -d, but since both inclined parts 5 have an inclination angle of 5° to 10° with respect to the shaft 7, clearance between them must be maintained for proper stacking. There is no excess or deficiency in the horizontal direction, and swing, which is a horizontal deviation, is prevented, and
Blocking is also prevented.

Moreover, it is regulated by the side surface portions 13 of the upper and lower containers, and displacement in the circumferential direction is also prevented at the same time.

The protruding portion may protrude inward rather than outward from the conical surface portion, or one portion may protrude outward and the other portion may protrude inward.

[Effects of the invention] As is clear from the above explanation, according to this invention, it is possible to stack containers with a desired stacking height in containers whose side walls have a large inclination angle of 15° or more or 30° or more with respect to the axis. Thus, it is possible to obtain a molded container that can prevent not only swing, which is a horizontal displacement, but also displacement in the circumferential direction.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional partial view showing a stacked state of molded containers according to an embodiment of this invention, Fig. 2 is a vertical cross-sectional side view of the - half of Fig. 3, and Fig. 3 is the same as Fig. 1. FIG. 4 is a plan view of the molded container shown in FIG.
6 is a plan view of the molded container shown in FIG. 5, and FIG. 7 is a half longitudinal sectional view of the molded container shown in FIG. 5 in a stacked state. 8 is a front view of a half vertical section showing another conventional molded container, FIG. 9 is a plan view of the molded container shown in FIG. 8, and FIG. 10 is a molded container shown in FIG. 8. FIG. 3 is a half-part vertical cross-sectional front view showing a stacked state. DESCRIPTION OF SYMBOLS 1... Molded container, 2... Container body, 3... Flange part, 4... Conical surface part, 5... Differently inclined part, 6...
Stack step, 7... shaft, 8... conical surface, 11
...protrusion part, 12 ... lower surface part, 13 ... side surface part,
14...Locking surface portion, 15...Rising surface portion.

Claims (1)

[Scope of utility model registration request] In a molded container in which the container body has a conical surface portion whose diameter increases in the axially upward direction, a rising surface portion whose diameter decreases in the axially upward direction and an inner diameter smaller than the diameter r of the open end and an outer side. a stack step part that goes around the circumference and has a locking surface part whose diameter is larger than the diameter r of the open end and which is connected to the lower end of the rising face part at the outer edge; an outer surface portion having a different slope smaller than the weight surface portion; A molded container characterized in that a plurality of molded containers are provided along the circumference.