JPH074459Y2 - Insulation box drainage structure - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to improvement of the drainage structure of a heat insulating box such as a frozen or refrigerated showcase.

(Prior Art) Conventionally, as shown in FIG. 3, this type of heat insulation box body is composed of an inner box (1), an outer box (2), and a heat insulating material (3) foam-filled between them. A drain port (5) is provided at the bottom for discharging the water accumulated in the box-shaped room (4). A downwardly extending tubular portion integrally formed with the inner box and a drainage pipe (6) attached to the tubular portion are installed at the drainage port.

FIG. 4 shows such a conventional drainage structure. In the conventional structure, an integral flange portion (6a) is provided at the upper end of the drainage pipe (6) and an inner box at the drainage port is shown. A flat portion (7) integrated with the inner box is formed in the portion (1), and the drain pipe (6) is fixed by fixing the flange portion (6a) to the flat portion (7) with a plurality of screws (8). ) Was installed. At that time, a sealing material (9) was applied to the heads of the respective screws (8) to prevent moisture from entering the heat insulating material inside the heat insulating box.

(Problems to be solved by the invention) Since the conventional drainage structure uses the screw and the sealing material for fixing the drainage pipe as described above, parts such as screws and sealing material are required and the drainage pipe is mounted. There has been a concern that a considerable amount of manual work is required and the seal may be incomplete due to corrosion of the screw and the sealing material.

The purpose of the present invention is to solve the above-mentioned problems of the prior art. Therefore, the drainage of the heat-insulating box body which facilitates the attachment of the drainage pipe without using a screw or a sealing material and has an excellent sealing property. Is to provide the structure.

(Means for Solving the Problem) The feature of the drainage structure of the heat insulation box body according to the present invention is that the upper portion of the drainage pipe including the flange portion of the upper end is fitted to the outer periphery of the tubular portion extending downward integrally with the inner box. The outer circumference of the drainage pipe is surrounded by a spacer (10) made of an elastic heat insulating material, the drainage pipe is held through the spacer (10) by the foaming pressure of the foam filling heat insulating material, and the flange at the upper end of the drainage pipe is caused by the foaming pressure. The part (6a) is configured to abut the annular flat part (1c) at the upper end of the tubular part.

(Function) In this drainage structure, the periphery of the drainage pipe is pressed inward by the foaming pressure through the spacer (10), and the flange portion at the upper end is above the flat portion around the tubular portion of the inner box through the spacer (10). And the drain is held in place without screws. Therefore, it is easy to install and has an excellent sealing property.

(Embodiment) FIG. 1 shows an embodiment of the present invention. This drainage structure also has an inner box (1), an outer box (2) and a heat insulating material (3) foam-filled between them, for example, It is provided at the bottom of a heat insulating box made of a heat insulating material such as urethane resin. That is, the first
As shown in the figure, the drainage structure according to the present invention is also provided with a drainage port (5) penetrating the inner box, the heat insulating material and the outer box at the bottom of the box body, and the inner box (1) around the drainage port. A short tubular portion (1a) extending downward together with an annular portion (1b) which is preferably inclined by burring or the like is formed integrally with the inner box at the bottom of, and a drain pipe (around the tubular portion (1a) ( The upper part of 6) is fitted. In the embodiment shown in FIG. 1, an annular flat portion (1c) is formed at the upper end of the tubular portion (1a), that is, between the tubular portion (1a) and the annular portion (1b). Preferably, a flare portion (6b) is formed on the outer periphery of the upper end flange portion (6a) of the drainage pipe (6), and when the drainage pipe (6) is attached at a predetermined position, the flare portion (6b) is an annular portion of the inner box. It comes into close contact with (1b).

Further, a spacer (10) made of a heat insulating material having a certain degree of elasticity is provided in the space between the inner box (1) and the outer box (2) around the drainage port (5), and the spacer (10) of the drainage pipe (6) is provided. The spacer (10) is fitted around the periphery. This spacer (10)
For example, hard rubber, soft plastic or the like is used. Therefore, at the position of the drainage port (5), the spacer (10) is installed around the drainage pipe (6), and further there is the heat insulating material (3) to be foam-filled, and the injection foaming of the heat insulating material (3) is performed. The spacer (10) receives the inward pressure due to the foaming pressure at that time, and holds the drain pipe (6).

In the above embodiment, the inner box (1) around the drainage port (5) has an inclined annular portion (1b) and the flare portion (6b) is formed at the upper end of the drainage pipe. In some cases, such an annular portion (1b) and flare portion (6b) may not be provided, as shown in FIG.

As shown by the arrow in FIG. 2 due to the foaming pressure of the heat insulating material (3), the spacer (10) receives a pressure inward in the radial direction along the entire circumference thereof and firmly holds the drain pipe (6). The flange portion (6a) of the drainage pipe receives an upward force via the spacer (10), so that the flange portion (6a) abuts against the flat portion (1c) of the side view of the inner box, and the drainage pipe (6a). ) Is held in place.

(Effects of the Invention) As described above, according to the present invention, the drainage pipe can be properly attached to the drainage port of the heat insulating box without requiring screws and sealing material, and the attachment can be performed very easily. You can Further, there is no fear that the seal will be damaged due to leakage from the screw portion or corrosion of the screw, and the sealing property is excellent.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a drainage structure for a heat insulating box according to the present invention, FIG. 2 is a sectional view showing another embodiment, and FIG. 3 is a sectional view showing an example of a heat insulating box. FIG. 4 is a cross-sectional view showing a similar conventional drainage structure. In the figure, 1: inner box, 1a: tubular part, 2: outer box, 3: heat insulating material, 5: drain port, 6: drain pipe, 6a: flange part, 10: spacer

Claims (1)

[Scope of utility model registration request] 1. A downwardly extending tubular portion integrally formed with the inner box at a drainage port at the bottom of a heat insulating box body made of an inner box, an outer box and a heat insulating material filled between them, and attached to the tubular section. In a drainage structure including a drainage pipe, a spacer made of a heat insulating material having elasticity and provided between an inner box and an outer box is installed on the outer periphery of the drainage pipe, and the drainage pipe is foamed by the foam filling heat insulating material. A drainage structure for a heat-insulated box body, which is held by the spacer by pressure, and a flange portion at an upper end of the drainage pipe abuts against an annular flat portion at an upper end of the tubular portion by the foaming pressure.