JPS5858587B2 - Method for manufacturing a heat insulating box having a drainage section - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a method for manufacturing a heat insulating box body used for freezing/refrigerating showcases, etc., by filling the box with foam insulation material, especially when it is necessary to provide a drainage section at the bottom. The purpose is to improve assembly workability.

Generally, to make an insulating box in its original shape, an outer box that matches the dimensions of the box and an inner box that is slightly smaller are assembled at regular intervals via spacers, and everything between them is The box is manufactured by filling the foam insulation material from the injection port with the drainage gap closed, and especially when it is required to provide a drainage section at the bottom of the box, the following steps are additionally carried out. It will be done.

That is, referring to FIG. 1 a = d, as shown in FIG. 1 a, a drain port 2 is provided in the bottom of the inner box 1, and a hole for penetrating the drain pipe is provided in the corresponding bottom of the outer box 3. 4, and as shown in FIG. 1, a drain pipe 5 is adhesively fixed at its open end to the peripheral edge of the drain port on the outer box side of the inner box 1.

Next, as shown in FIG. 1C, the lower end side of the drain pipe 5 is
After assembling the inner box 1 to the outer box 3 via a spacer (not shown) so that it fits into the outer box 3, and installing the packing 6 between the drain pipe 5 and the hole 4 (Fig. 1d), the foaming agent is poured. By filling the urethane foam from the inlet (not shown), the urethane foam is prevented from leaking from the connecting portions between the inner box 1 and the outer box 3 and the drain pipe 5.

However, in such a work process, since the drainage part is small compared to the size of one box, it is necessary to align the inner box 1 in order to fit the lower end of the drain pipe 5 into the hole 4 of the outer box 3. There are also assembly problems in that it is not easy to attach the packing 6 to the hole 4 of the outer box 3 into which the drain pipe 5 is fitted.

The present invention is a manufacturing method that solves these problems,
An example of this will be described below.

Figures 2a to 2d are diagrams showing the assembly process for manufacturing a heat insulating box according to the present invention.

In the figure, a drain port 2 is installed in advance at the bottom of the inner box 1.
Holes 4 for drain pipe penetration are provided at the bottom of the outer box 3 (Figure 2 a), and a patch/6 is attached to the hole 4 of the outer box 3, and a socket with a diameter larger than the drain port 2 is installed. A drain pipe 5 with a sealing member 7 (for example, a soft synthetic resin such as Moltoprene) attached to the open end is fitted in a downwardly shifted position so that it can slide up and down (Fig. 2b).
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The inner box 1 is set in a predetermined position and assembled into the outer box 3 with the spacer 8 in between (FIG. 2C). After that, as shown in FIG. 2D, the drain pipe 5 is attached to the sealing member. 7 is pushed up so that it comes into close contact with the peripheral edge of the drain port of the inner box 1, and in this state, the space between the inner box 1 and the outer box 3 is filled with foamed urethane and solidified.

Thereafter, when the foamed urethane solidifies, the drain pipe 5 is fixed with its open end in close contact with the inner box 1 side, and a heat insulating box similar to the conventional one is obtained.

According to such a manufacturing method, when the inner box 1 is set in the outer box 3, there is no need for complicated positioning to fit the drain pipe 5 into the hole 4 of the outer box 3 as in the conventional case. The position can be easily adjusted by freely shifting the inner box 1 to the outer box 3 in the front, back, left and right directions.

Further, since the packing 6 is attached before the drain pipe 5 is fitted, it is easy, and the ease of assembly work can be greatly improved.

In addition, since the urethane foam is filled not only in the packing 6 part but also in the seal member 7 part while being in close contact with the inner box 1 side, there is no chance of urethane foam leaking from these parts. .

Therefore, according to the present invention, a heat insulating box similar to the conventional one can be provided at a low manufacturing cost.

[Brief explanation of the drawing]

Figures 1a to d are end views showing part of the conventional assembly process for manufacturing a heat insulating box body having a drainage part around the drainage part, and Figures 2a to d show a part of the conventional assembly process for manufacturing a heat insulating box body having a drainage part. FIG. 6 is an end view sequentially showing a part of the assembly process when manufacturing the body around the drainage part. The drawing reference numbers are as follows: 1... Inner box, 2... Drain port, 3... Outer box, 5...
- Drain pipe, 6... Packing, 7... Seal member, 8... Spacer.

Claims (1)

[Claims] 1. An outer box having a hole for penetrating a drainage pipe at the bottom. In a method of manufacturing an insulating box body by filling a foam insulation material between an inner box that is installed at a certain distance from the outer box and has a drainage port at the bottom corresponding to a hole in the outer box, the inner box A drainage pipe having a frontage end for receiving drainage having a diameter larger than the drainage opening and having a sealing member attached to the opening end is fitted in advance through the hole VC packing of the outer box in a slightly downwardly shifted state. and, after positioning the inner box with respect to the outer box, the opening end of the drain pipe is brought into close contact with the peripheral edge of the drain port on the outer box side of the inner box, and the foam insulation material is filled. A method for manufacturing an insulating box having a drainage section.