JPS6020617Y2 - synthetic resin container - Google Patents

Description

[Detailed description of the invention] This invention relates to a container made of synthetic resin, in which an inner body and an exterior body, each having a heat insulating layer interposed between them, are joined to provide good sealing at the joint. The aim is to provide a product that is easy to use and easy to join and manufacture the entire container.

Traditionally, containers made of synthetic resin have a structure in which a core material made of foamed resin, which serves as a heat insulating layer, is interposed between an inner body and an exterior body made of non-foamed resin in order to maintain heat and cold. has been done.

As a method of joining the ends of the inner body and the outer body, welding using thermoplastic resin has begun to be used instead of the conventional screw fastening, and this method has excellent sealing properties at the joint, such as when washing the container with water. It has the advantages of being hygienic and having excellent heat insulation effects since moisture does not infiltrate from the joints.

However, in the case of the above-mentioned welded structure, it is necessary to form grooves for welding at the ends of the inner body and the outer body, and therefore a considerable thickness must be provided near the ends of both.

However, in order to reduce the weight and price of the entire container, it is better to make the inner and outer bodies thinner, and forming only the two ends thicker would complicate the molding and cause an increase in price. It had become.

Therefore, in this invention, the above-mentioned drawbacks are solved, and a container is provided which has a welded structure with excellent sealing properties at the joint, and which is lightweight and simple.The structure is as follows:
A container consisting of an interior body and an exterior body made of synthetic resin with a heat insulating layer interposed between them, and where the ends of the interior body and exterior body are joined to each other, the ends of the interior body and the exterior body face each other. A sandwiching member is sandwiched inwardly between the circumferential edges, and thermoplastic resin is welded along the circumferential groove formed by the sandwiching member and the circumferential edges on both sides to close the joint. It is characterized by being integrated.

Next, embodiments of this invention will be illustrated below with reference to the drawings.

The illustrated example is a heat-insulating container for serving meals, which can be used to store and transport food served on tableware in hospitals, etc., and can also be used to serve meals when patients are eating on their beds. However, it can also be carried out in various other uses and shapes, such as shipping boxes and cold storage containers.

Specifically, A is the container body, B is the lid,
Both have an interior body 1 and an exterior body 2 made of molded products of non-foamed resin, with a core material made of foamed resin interposed therebetween as a heat insulating layer 3.

Then, on the side surface of the container where the inner body 1 and the outer body 2 are joined, a peripheral edge portion 10.2 whose ends are opposite to each other is formed.
0, respectively, and a sandwiching member 4 made of synthetic resin or the like is sandwiched between the opposing peripheral edges 10 and 20 at the inner depths thereof.

5 is a welded part made of a welding material made of thermoplastic resin,
The circumferential groove-like part 6 formed by the above-mentioned mutually opposing circumferential parts 10 and 20 and the intervention of the sandwiching member 4 between them is used as a groove, and the welding 5 is applied to this circumferential groove-like part 6 to form an inner body. 1 and the exterior body 2 are joined together (see especially Fig. 3).
.

The container body A is formed with a recess 1 for storing tableware, a protrusion a2 around the recess, and a fitting part a3 with the lid B, and the lid B also corresponds to the recess a□ of the container body A. A recessed portion is formed at the position where the container is located, and a fitting portion b3 is formed on the outer periphery (see Fig. 1), and the detailed structure of these containers is completely free and can be changed in various ways depending on the intended use of the container.

Among the materials forming the container, foamed polystyrene or other foamed resin can be used for the heat insulating layer 3, and synthetic resins such as polystyrene, polyethylene, polypropylene, etc. can be used for the inner body 1, the outer body 2, and the sandwiching member 4. As the thermoplastic resin welding material used for the welding part 5, one made of the same material as the interior body 1 and exterior body 2 is excellent in terms of welding performance such as bonding force. When 2 is polypropylene, it is preferable to use polypropylene as the welding material.

In addition, the sandwiching member 4 may be made of a relatively hard material molded into a ring shape corresponding to the outer shape of the container, or may be a combination of parts made by dividing the ring as appropriate. It is formed into a rod shape or a thick wire shape from a flexible or flexible material, and covers the entire circumference of the heat insulating layer 3 by bending the sandwiching member 4 along the periphery of the heat insulating layer 3 when installed. However, this method is advantageous because it can easily accommodate changes in the outer shape of the container, and is also easy to manufacture and versatile.

Note that the sandwiching member 4 is attached to the heat insulating layer 3 or the interior/exterior body 1 when installed.
After temporarily adhering to the interior and exterior bodies 1, 2 with adhesive etc.
2, or directly welded to the interior/exterior body 1.2 without temporary bonding.

Moreover, if the heat insulating layer 3 and the interior body 1 and exterior body 2 are bonded with adhesive or the like, the integrity will be even better.

As a container, the peripheral edges 10.20 and the welded parts 5 of the inner body 1 and the outer body 2, which are closed and integrated by welding using the thermoplastic resin, can be used as they are, but the swell of the welded parts 5 and the peripheral edges 10.20 can be used as they are. In order to remove irregularities at the tip of the 20, it is preferable to cut or polish the area to an appropriate width after welding; this will give a good appearance.

The container of this invention having the above-mentioned configuration does not have a bevel formed directly at the ends of the inner and outer bodies at the joint between them, making it possible to reduce the thickness of the inner and outer bodies. This is suitable for reducing the overall weight.

Further, there is no need for complicated molding processes, which were conventionally performed, such as thickening only the areas near the joints and shaping the ends of the interior and exterior bodies according to the required groove shape.

That is, in this invention, the inner body and the outer body have peripheral edges facing each other, and by sandwiching the sandwiching member inwardly between the peripheral edges, a groove-shaped groove surrounded by the peripheral edges and the sandwiching members on both sides is formed. Since the portions are grooves, even if the inner body and the outer body are formed thin, a groove of a sufficient size can be formed, and there is no possibility that the welding performance will be adversely affected.

Moreover, since the shape of the peripheral portion and the shape of the sandwiching member may be very simple, the molding process is easy and the cost is low.

In addition, using a highly heat-resistant sandwiching member prevents high heat from being transmitted to the foam, etc. that serves as the internal heat insulating layer during welding work, and prevents thermal deformation and local melting of the foam, etc. At the same time, it is possible to prevent heat from accumulating inside.

Therefore, according to this invention, it is possible to provide a container that is lightweight and inexpensive, and has excellent welding performance such as the joint strength of the welded part, that is, the integrity of the interior and exterior bodies. It can exhibit many very practical features.

[Brief explanation of drawings]

The figures illustrate an embodiment of this invention, and FIG. 1 is a perspective view, FIG. 2 is a sectional view when the lid is closed, and FIG. 3 is an enlarged sectional view of the previous C section. 1...Interior body, 2...Exterior body, 3...
...Insulating layer, 4...Pinching member, 5...
...Welded part, 6... Circumferential groove part, 10, 20...
...Periphery, A...Container body, B...
··lid.

Claims (1)

[Scope of utility model registration request] A container consisting of an interior body and an exterior body made of synthetic resin with a heat insulating layer interposed between them, and where the ends of the interior body and exterior body are joined to each other, the ends of the interior body and the exterior body face each other. A sandwiching member is sandwiched inwardly between the circumferential edges, and thermoplastic resin is welded along the circumferential groove formed by the sandwiching member and the circumferential edges on both sides to close the joint. An integrated synthetic resin container.