JPH02298781A - Method for manufacturing inner bottom panel of freezing and refrigerating show case - Google Patents

Abstract

PURPOSE:To enable a complete draining of water to be attained without using any large-sized press by a method wherein an inner bottom panel at a central part, a front bottom inner panel and a rear bottom inner panel are integrally fixed to each other at their flanges, their connecting surfaces are sealed and then an inner surface of the bottom panel is formed. CONSTITUTION:Three inner plates, i.e. a bottom inner panel 21 at a central part, a front bottom inner panel 22 and a rear bottom inner panel 23 are caulk by a caulk machine at opposing portions 24 and 25 of flanges formed at either one end or both ends. A drain port 26 is formed at a substantial central part of the bottom inner panel at the central part. Sealing material is applied to upper surfaces of connection parts of the inner plates 21, 22 and 23, lower ends of the flanges are covered by a type so as to prevent thermal insulating material acting as foam agent from being leaked out at the upper surfaces of the connecting portions in case that the foaming material is to be foamed and a clearance is formed due to insufficient caulk. With such an arrangement, a small-sized press machine and a caulking machine are required for their formation and further its possible to provide a formation without requiring any press for a drawing operation or a large-sized pressing machine.

Description

[Detailed Description of the Invention] [Industrial Field of Application] According to the present invention, waste water from a freezer/refrigeration showcase is quickly drained without accumulating in the refrigerator.

The present invention relates to a method of manufacturing an inner plate of a bottom panel of a frozen/refrigerated showcase.

[Prior Art] As an example of a structure manufactured by this type of manufacturing method, Fig. 4 shows seven schematic cross-sectional views of the entire frozen/refrigerated oven showcase, and Figs. 5 and 6 show a structure manufactured by a conventional manufacturing method. Figure 3 shows a perspective view of the bottom panel.

Referring to Figure 4, frozen/refrigerated open showcase 1
To explain briefly, an inner box 3 is assembled at a predetermined interval within an outer box 2 made of a heat insulating material whose cross section is approximately U-shaped,
Within this interval, a cooling refrigerant evaporator 4 and a blower 5 are disposed to form a cold air ventilation path from the bottom to the ceiling via the back, and a blowout section provided at the front end of the ceiling of this ventilation path. 6
The front opening of the case is covered with a cold air curtain as shown by the arrow by circulating ventilation in which cold air blown out from the housing is sucked in from the suction section 7 on the lower side. The cooling refrigerant evaporator 4 exchanges heat when warm air passes through it.

As a result, dew and frost adhere to the cooling refrigerant evaporator 4.

It melts during defrosting and is discharged outside the refrigerator through a drain port 8 formed in the bottom panel 2a at the bottom of the outer box 2. Also.

It is also discharged when the inside of the refrigerator is cleaned.

The bottom panel 2a manufactured by the conventional method shown in FIG. It consists of a bottom panel inner plate 13 having an inclination in front and behind the drain, and a heat insulating material 15 such as a foam material which has its own adhesive strength.

The bottom panel inner plate 16 shown in FIG. 6 is formed by bending the cross section into a substantially U-shape in steps using a press brake to form a drain groove 17, and has an inclination in the front-rear direction, but not in the left-right direction.

[Problems to be Solved by the Invention] In the case where the bottom panel inner plate 13 is drawn with a press machine to form the drain groove 12 and the drain groove slope as shown in FIG. 5, a press mold for drawing is required. It takes time and cost to create a press mold, requires a large press machine of about 400 tons, and also takes time to assemble the mold before processing, making it unsuitable for high-mix, low-volume production. Furthermore, to improve drainage performance, the drainage slope can be increased.

There are limits to the squeezing process. Yet again. Bottom panel inner plate 1
If drawing is performed using a galvanized iron plate in step 3, the galvanized iron plate will be stretched and the zinc plating on the surface will crack, and rust will occur due to moisture and oxidation of the drainage water, so be careful not to draw the slope of the drainage after drawing. Rust-preventive paint must be applied, and care must always be taken to prevent the paint from peeling off, which is undesirable from a maintenance standpoint.

In addition, as shown in Fig. 6, when the drainage groove 17 is formed by bending the inner plate 16 of the bottom panel into a substantially U-shaped cross section using a press brake, the showcase is installed horizontally because the drainage groove does not have an inclination. If this is not done, the water will not be completely drained from the drain and dirt will accumulate.

It has drawbacks such as promoting the generation of bad odors.

Therefore, the present invention solves these drawbacks by using a simple manufacturing method, and provides a method for manufacturing an inner bottom panel of a freezing/refrigerating showcase that can be formed without using a large-sized press and allows complete drainage. This is what I am trying to do.

[Means for Solving the Problems] According to the present invention, the lower part of the outer box of the frozen/refrigerated showcase has an inclined drain groove with a drain opening in the center and drains on both sides of the inclined drain groove in the width direction. In the method for manufacturing an inner plate of a bottom panel in which the bottom panel is constituted by a front part and a rear bottom panel inner plate forming a surface, the inner plate is connected to a drainage slope forming the bottom of the inclined drainage groove. The center bottom panel is mainly composed of an inner plate bent back on both sides in the width direction to form two flanges, and an inner plate that provides the sink surface and faces the inclined drain groove. said two front and rear bottom panel inner plates bent back at the sides to form flanges individually opposed to said two flanges;
a step of forming an integral structure by fixing a set of opposing flanges to each other; and a step of forming an inner surface of the bottom panel by sealing a joint surface between the drain slope plate and the inner plate of the front and rear bottom panels. It is characterized by having the following. A method for manufacturing an inner plate of a bottom panel of a frozen/refrigerated showcase is obtained.

[Embodiment] FIG. 1 is a diagram of the structure of the bottom panel inner plate manufactured according to an embodiment of the present invention, viewed diagonally from below. In the figure, 21 is an inner plate of the center bottom panel, 22 is an inner plate of the front bottom panel, and 23 is an inner plate of the rear bottom panel, and these three inner plates are the opposing parts 2 of the flange formed at one or both ends.
4.25 is caulked by a caulking machine. Reference numeral 26 denotes a drainage port opened approximately in the center of the inner plate of the central bottom panel.

In addition, the upper surface (27
and 28 indicate the front end thereof) are coated with a sealing material. In addition, the lower end of the flange is covered with tape, and when foaming the insulation material (corresponding to 14 in Figure 5), which is a foam material, if the caulking is insufficient and there is a gap,
This prevents moisture from coming out on the top surface of the joint. Note that this tape covers the lower end of the flange to a considerable extent, but in FIG. 2 it only covers the lower end.

FIG. 2 is a diagram showing the bottom panel inner plate of each part separated before being manufactured by caulking the inner plate of FIG. 1.

Identical parts are given the same reference numerals. One or both ends of each inner plate in the width direction are bent to the back and a flange (29
indicates one of them. ), and the lower ends of the opposing flanges are aligned. The main body of the central bottom panel inner plate 21 corresponds to the bottom plate of the drain slope (12 in FIG. 5). The main bodies of the front and rear bottom panel inner plates 22, 23 form sink surfaces. A chain line 30 drawn along the entire length of the flange 29 of the rear bottom panel inner plate 23 indicates the position of the upper surface of the joint shown at 27 in FIG.

FIG. 3 is a diagram showing the structure of a bottom panel using the bottom panel inner plate manufactured by the method of the above embodiment. 2] ~ 30
indicates the same thing as in FIGS. 1 and 2, 31 is an inclined drainage ditch, and 32 is a heat insulating material.

33 is a reinforcing material, and 34 is a bottom panel outer plate.

If you compare the bottom panel manufactured by the method of this embodiment shown in FIG. 3 with the bottom panel manufactured by the conventional method shown in FIG. Apart from that, it is not possible to distinguish between the two by appearance,
It can be used effectively as a bottom panel. Moreover, a small press machine and a caulking machine are required for the formation, and there is no need for a press mold or a large press machine for webbing, which was required in the past.Therefore, there is no need to assemble a mold before processing. Even when the material is galvanized iron plate, cracks do not occur in the galvanized surface.

[Effects of the Invention] As can be seen from the above explanation, the bottom panel inner plate manufactured according to the present invention can be processed at low cost and in a short period of time, is suitable for high-mix low-volume production, and is easy to use. No rust prevention treatment is required regardless of the material of the plate. Also, the inner plate of the bottom panel is divided.

The material of the inner plate can be changed as necessary.

For example, a stainless steel plate may be used for the inner plate 21 of the middle bottom panel where water easily accumulates, and galvanized iron plates may be used for the other inner plates 22 and 23 of the front and rear bottom panels. Furthermore, according to the manufacturing method of the present invention, since the angle of inclination of the drain groove can be arbitrarily selected, the angle of the drain groove can be made large, and drainage performance can be improved.

[Brief explanation of the drawing]

FIG. 1 is a diagram illustrating the structure of an inner plate of a bottom panel manufactured according to an embodiment of the present invention, viewed diagonally from below. Figure 2 is a diagram showing the bottom panel inner plate of Figure 1 divided into three parts, Figure 3 is a diagram showing the structure of the bottom panel using the bottom panel inner plate of Figure 1, and Figure 4 is a diagram showing the structure of the bottom panel using the bottom panel inner plate of Figure 1. 5 and 6 are perspective views of two examples of bottom panels manufactured by conventional methods. Explanation of symbols = 2a is the bottom panel, 21 is the center bottom panel inner plate, 22 is the front bottom panel inner plate, 23 is the rear bottom panel inner plate, 24 and 25 are opposing parts of the flange, 26 is the drain port, 29 is a flange, 30 is the upper surface of the joint, 31 is an inclined drain, and 32 is a heat insulating material. 33 is a reinforcing material, and 34 is a bottom panel outer plate. Figure 1 Figure 2 Figure 3 Figure 4 Drain outlet

Claims (1)

[Scope of Claims] 1. The lower part of the outer box of the frozen/refrigerated showcase has a sloping drainage groove with a drainage hole in the center, a front part forming sink surfaces on both sides of the sloping drainage groove in the width direction; In a method for manufacturing an inner plate of a bottom panel in a case where the inner plate of the bottom panel is configured with an inner plate of the rear bottom panel, the inner plate is mainly composed of a drainage inclined plate constituting the bottom of the inclined drainage groove, and the width direction of the inner plate is a central bottom panel inner plate which is bent back on both sides to form two flanges, and an inner plate that provides the sink surface and is bent back on the side facing the sloping drain; integrating the front and rear bottom panel inner plates forming flanges facing the two flanges individually by fixing the two sets of facing flanges; and the drainage slope. forming an inner surface of the bottom panel by sealing a joint surface between the plate and the inner plate of the front and rear bottom panels. Method of manufacturing the board.