JPS609163Y2 - plastic foam container - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a container made of plastic foam for storing vegetables, fruits, etc., for example.

More specifically, the present invention relates to a container made of plastic foam that can securely lock the container body and its lid.

In conventional plastic foam containers, the lid and the container body are usually locked by pushing the lid like a plug into the opening of the container body.

That is, the lid is provided with a step slightly larger than the opening size of the container body, and by pushing this step into the opening, the two are locked together.

However, this structure has the disadvantage that the locking becomes excessively strong or weak due to errors in dimensional accuracy and lacks uniformity.

Also, since the two are ultimately locked together by friction,
There was a drawback that as wear progressed during use, the locking became uncertain.

This idea was devised in view of the above circumstances, and is a plastic material that allows the lid to be securely attached, so that the lid and the container body are not locked by friction but by the fitting of the protrusions and holes. The aim is to provide a container made of foam.

That is, this invention is a plastic foam container consisting of a rectangular container body and its lid, each of which has vertical surfaces that face each other when the lid is attached.
An engagement mechanism consisting of a chevron-shaped engagement protrusion and a concave engagement hole for accommodating the engagement protrusion is provided between the vertical surfaces facing each other, and the entrance portion of the retention hole is inclined. To provide a container made of plastic foam, characterized in that it has a punching hole for engaging double molding during molding on the opposite side of the entrance part of the retaining hole.

One of the features of this invention, as mentioned above, is that the lid and the container body are engaged with each other through projections and holes.

Yet another reason lies in the use of a specific structure that facilitates the operation of attaching and removing the lid.

Another reason is the use of a specific structure that facilitates foam molding.

This invention will be explained in detail below based on the embodiment shown in the figures.

The one shown in FIGS. 1 to 3 is an embodiment in which a locking protrusion is provided on the container body side and a locking hole is provided on the lid side.

The lid 3 of this container 1 is engaged so as to cover the container body 2, and the vertical surface 6 of the lid 3 and the vertical surface 7 of the container body 2 face each other.

Therefore, a retaining protrusion 4 is provided on the vertical surface 7 of the container body 2, which is the outward vertical surface.

An engagement hole 5 is provided in a vertical surface 6 of the lid 3, which is an inward facing vertical surface, at a position corresponding to the engagement protrusion 4.

The engagement protrusion 4 and the engagement hole 5 constitute an engagement mechanism.

As shown in FIG. 1, the shape of the engagement protrusion 4 is a hemispherical shape with the upper part cut out diagonally downward, but any shape may be used as long as it is raised in the shape of a mountain.

The engagement hole 5 has a shape (full shape) that wraps around the engagement protrusion 4, but a punch hole 8 for removing the molding die (not shown) vertically upward is formed vertically from the engagement hole 5. Strictly speaking, since the engaging hole 5 is penetrated upward, the upper part of the engaging hole 5 is not completely shaped.

The lid side wall edge 9 below the engagement hole 5 is inclined inward.

To attach the lid 3 to the container body 2, the lid 3 may be placed on the container body 2 and then strongly pushed downward.

Due to the inclination of the upper part of the engagement protrusion 4 and the inclination of the edge of the lid side wall (inlet of the retaining hole 5) 9, the downward force is divided into a lateral force, so that the lid side wall expands or the container main body side wall expands. They are recessed and the two are easily fitted together.

When removing the lid 3, open the recessed hole 1 on the side wall of the container body.
Insert your index finger into the lid 3, press the side wall of the container with your other fingers to make a dent, and use your index finger to flip up the lid 3.

Examples of the plastic foam include styrene resin foamed with 10 to 3 pores.

Note that 11 is a ventilation hole.

The one shown in FIGS. 4 and 5 is an embodiment in which an engagement hole is provided on the container body side and an engagement protrusion is provided on the lid side.

This container 11 is of a type in which the lid 13 is inserted into the upper opening of the container body 12 in a plug-like manner, so that the inward vertical surface 16 of the container body 12 and the outward vertical surface 17 of the lid 13 face each other. do.

Therefore, a retaining hole 15 is made in the vertical surface 16 of the container body 12.
An engaging protrusion 14 is provided on a vertical surface 17 of the lid 13.

Then, vertically downward from the engagement hole 15, the engagement double molding mold (
(not shown), and the engagement hole 1
5. Incline the upper side wall edge 19 of the container body inward.

When attaching the lid 13, attach the lid 13 to the container body 1.
Just push it into the upper opening of 2.

When removing the lid 13, it is sufficient to put the fingers of one hand into the recessed hole 20 at the upper end of the side wall of the container body and pull the lid 13 up with the other hand while pulling the side wall of the container body to widen it.

As described above, in the plastic foam container of this invention, the container body and the lid are locked together by the engaging protrusion and the engaging hole, so even if there is some dimensional error due to the molding process, the container can be secured securely. Both can be locked.

This means that manufacturing becomes easy and that both can be reliably locked even if some dimensional changes occur due to use.

Furthermore, since the entrance portion of the engagement hole is sloped, it is easy to attach and remove the lid.

However, although it is simple, the lid cannot be easily removed unless two forces, a lateral force and a vertical force, are applied at the same time, so the lid will not come off on its own.

Further, since the locking projection projects outward and the engagement hole is provided with a punching hole of a molding die, there is no difficulty in molding and manufacturing is easy.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of an embodiment of the plastic foam container according to this invention, Fig. 2 is an enlarged vertical cross-sectional view of the engagement portion between the lid and the container body, and Fig. 3 is an enlarged longitudinal sectional view of the engagement portion seen from the inside of the lid. It is a broken enlarged view of a combined part. FIG. 4 is a perspective view of the engaging portion between the lid and the container body of another embodiment of the plastic foam container according to this invention, and FIG. 5 is an enlarged longitudinal sectional view of the same portion. 1.11...Plastic foam container,
2.12...Container body, 3,13...
...Lid, 4.14...Engagement protrusion, 5,15.
...Engagement hole, 6.16...Inward vertical surface, 7,17...Outward vertical surface, 8,18.
...Blank hole, 9,19...Inwardly inclined side wall edge.

Claims (1)

[Scope of utility model registration request] A plastic foam container consisting of a rectangular container body and its lid, each having a vertical surface that faces each other when the lid is attached, and a chevron-shaped engaging protrusion on the vertical face that faces each other and the engaging protrusion. The locking hole is provided with an engaging mechanism consisting of a concave locking hole for accommodating the locking hole, and the locking hole has an inclined entrance, and a molded hole is formed on the opposite side of the locking hole's entrance. A container made of plastic foam, characterized in that it is provided with a punching hole for double-mold engagement.