JPS5911098Y2 - Synthetic resin shipping box - Google Patents

Description

[Detailed description of the invention] This invention relates to a container made of plastic resin used for transporting various products, and the inner body and the outer body are connected at the joint end with a heat insulating layer interposed between them. These are bonded to ensure good sealing.

Conventionally, in the case of shipping boxes made of synthetic resin, a core material made of foamed resin is interposed between an inner body and an outer case made of non-foamed resin as a heat insulating layer to ensure that the boxes are kept warm and cold. This structure was adopted, and the ends of the inner and outer bodies were fastened with screws at the surface of the box where they were directly fitted together.

However, the above-mentioned boxes need to be washed frequently and sterilized with boiling water to maintain sanitary use.
At that time, moisture easily enters the interior through the mating ends of the inner body and the exterior body, and the screw-fastened locations at the mating ends, and once it enters and enters the inside of the bottom of the box, it is extremely difficult to drain. ,
It was easy to accumulate inside the bottom and reduce the insulation effect.

Therefore, this invention eliminates the above-mentioned drawbacks and improves the sealing performance at the joint end of the interior body and exterior body. A box with a heat insulating layer interposed between the two, the ends of the inner body and the outer body are butted against each other on the box surface, and a groove-like part is formed on the outside of the butted part. Further, the abutting portion is closed and integrated by welding thermoplastic resin along the groove-like portion.

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

1 shows the entire shipping box, in which an inner body 10 and an outer body 20 made of non-foamed resin are interposed with a heat insulating layer 3 between them.
0, the ends or the vicinity thereof are joined to each other with a core material made of foamed resin interposed therebetween.

As a specific structure for joining and fixing, the interior body 10 and the exterior body 2 are
The end portions 11 and 21 of the box 0 are butted against each other on the surface of the box, and a groove-like portion 40 is formed outside of the butted portion a.

Thermoplastic resin 50 is then applied along such grooved portion 40.
Welding is performed using a welding rod according to the above, and the abutted portion a is closed and integrated by the welding.

Groove portion 40 to be welded using the above-mentioned thermoplastic resin 50
As for the shape of the case, it is better to use the embodiment shown in Figure 1 (Fig. 2) and Fig. 3, in which the joint and fixed part does not protrude much on the surface of the box even after welding, and the shape shown in Fig. 4 (Fig. 5) and Fig. 5 is better. In FIG. 6, protrusions 12 and 22 are formed near each end 11 and 21 of the inner body 10 and the outer body 20, and the above-mentioned groove-shaped portion 40 is formed.
In some embodiments, the protrusions 12 and 22 are formed between the protrusions 12 and 22, and the protrusions 12 and 22 are preferably formed over the entire outer periphery of the box, but may be separated in some parts. It is possible to implement even if the

In this way, the protruding portion 12. 22 as the inner body 10 and the outer body 2
0, the butt portion between the interior body 10 and the exterior body 20 can be sufficiently spaced,
In addition, it is easy to weld, and even easier to integrate the seal by welding.

In the illustrated shipping box, reference numeral 60 denotes gripping portions formed on opposing sides, and a plurality of protrusions 61 are integrally formed on the lower surface to prevent slippage and facilitate gripping.

Reference numeral 70 denotes a connection reinforcement part between the inner body 10 and the outer body 20 on the bottom side, and the several protruding legs 13 of the inner body 10 are inserted into the holes 31 of the heat insulating layer 30, so that the bottom side of the outer body 20 is Lavis 7
It is fixed at 1 to increase the connection effect.

Reference numeral 80 denotes the lower surface of the exterior body 20 which serves as the bottom of the shipping box 1, and is of a form that allows the shipping boxes 1 to be stacked one after another with or without a lid 90 made of foamed resin, for example, as shown in the figure. The bottom shape is not limited to this.

Note that, for example, it is preferable to use foamed polystyrene or other foamed resin as the above-mentioned heat insulating layer 30, and to use the same material as the inner body 10, the outer body 20, and the thermoplastic resin 50 for welding to obtain a preferable welding effect. For example, if the interior body 10 and the exterior body 20 are made of non-foamed polypropylene, a welding rod made of non-foamed polypropylene is used.

This invention is based on the case 1 in which the heat insulating layer 30 is interposed between the inner body 10 and the outer body 20 as described above, the ends 11 and 21 of the inner body 10 and the outer body 20 are They are butted against each other, but instead of leaving the abutting portion a exposed as it is, which forms a simple joining structure, welding with thermoplastic resin 50 is performed along the groove-shaped portion 40 formed outward from the abutting portion. Since the abutting portion a is closed and integrated, there is no fear of water or the like entering the joint end.

Therefore, even if the shipping box is frequently washed with water, sterilized with boiling water, etc., moisture will not enter the space between the inner body and the outer body, making it possible to provide a shipping box with excellent waterproofness.

[Brief explanation of drawings]

The figures illustrate an embodiment according to this invention, and Fig. 1 is a perspective view, Fig. 2 is a partially enlarged cross-sectional view taken along line I - ■■ in the previous figure, and Fig. 3 shows the shape of the groove. 4 is a perspective view with the protrusion shaped, FIG. 5 is a partially enlarged sectional view taken along line 1 and 2 in the previous figure, and FIG. 6 is a sectional view with the groove shape changed. , FIG. 7 is an overall bottom view, and FIG. 8 is a partially enlarged sectional view taken along line Vl--■ in the previous figure. 1...Transportation box, 10...Inner body, 20.
... Exterior body, 11, 21 ... End part, 12
, 22... Protrusion portion, 30... Heat insulation layer, 40... Groove portion, 50... Thermoplastic resin by welding, a... ...butt part.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A transportable box consisting of an inner body and an outer body made of synthetic resin with a heat insulating layer interposed between them, the ends of the inner body and the outer body being They are butted against each other, a groove is formed on the outside of the abutted portion, and thermoplastic resin is welded along the groove to close and integrate the abutted portion. A shipping box made of resin. 2. A plastic mailbox according to claim 1 of the above-mentioned utility model registration claim, in which the groove-like portion is formed between the protrusions on the surfaces of the inner body and the outer body. 3. The above utility model registration claim 1, wherein the heat insulating layer is made of foamed polystyrene, the inner body and the exterior body are made of non-foamed polypropylene, and further welded with non-foamed polypropylene. A shipping box made of synthetic resin.