JPH0424482A - Door structure for refrigerator - Google Patents

Abstract

PURPOSE:To make a door with assembling structure permitting the replacement of a double- layer glass plate and contrive the facilitation of repairing, the improvement of assembling workability and the saving of the number of parts to realize the reduction of the cost of a refrigerator by a method wherein a door panel is attached to the door of the refrigerator, which is constituted of a foaming structure having a glass window unit, at a last process. CONSTITUTION:A resin sash 13 is fitted into the inner peripheral rim of the rear side opening 11 of a door frame 10 made of a metal. The sash 13 is attached to a mounting groove 23, to which a gasket 16 accommodating a magnet 22 is attached, by fitting a mounting projection 24 at the side of the gasket 16 into the mounting groove 23. On the other hand, a double- layered glass plate 3, to the peripheral end face of which a packing 14 made of rubber is fitted, is fitted to the front side opening of a door frame 10. Expandable heat insulating material 30 is filled into a gap between the door frame 10, to which a sash 13 is attached employing a foaming jig consisting of a top force and a bottom force, and the double-layered glass plate 3, fitted into and arranged in the door frame 10, and is foamed. According to this method, the sash 13 and the double layered glass plate 3 are connected integrally with the door frame 10 whereby a door main body 1A is formed substantially. Finally, a door panel 15 is attached to the door main body 1A so as to cover the exposed surfaces of the heat insulating material 30.

Description

[Detailed description of the invention] (a) Industrial application field The present invention is applicable to refrigerators (industrial refrigerators) that are often used in the kitchens of hotels, restaurants, etc., and in general stores such as liquor stores and convenience stores. In particular, this invention relates to the structure of a refrigerator door in which a part of the door is made of a multilayer glass plate so that the stored items inside the refrigerator can be seen.

(b) Conventional technology Refrigerator doors fitted with this type of double-glazed glass plate are made by firmly attaching a relatively heavy double-glazed glass plate to the opening of the door body, and also by attaching the relatively heavy double-glazed glass plate firmly to the opening of the door body. They are manufactured and assembled using various structural techniques to ensure sufficient thermal insulation. For example, the structure is Utility Model Publication No. 47-9724
This is as shown in Japanese Utility Model Publication No. 48-34018.

That is, a receiver that combines an outer plate and an inner plate having a transparent window opening, and in which the inner plate forms a recessed groove portion for receiving the edge of the double-glazed glass plate together with the opening edge of the outer plate, or After the support frame is fixed with screws, screws, etc., and the edge of the double-glazed glass plate is fitted into the groove, a heat insulating material is filled between the outer panel and the inner panel.

(C) Problems to be Solved by the Invention However, in the conventional structures shown in the above publications, members such as holders and support frames for supporting the edge of the double-glazed glass plate are attached to the inner plate with screws. It is stuck, there are many parts, and
Its workability was also poor.

Additionally, these components are embedded in the insulation material and difficult to remove, so if the double-glazed glass panel is damaged, it is not possible to replace just the glass panel, and the entire door must be replaced with a new one. This has disadvantages such as high repair costs.

The present invention has been made to solve the above-mentioned drawbacks of conventional refrigerator doors with a see-through window structure, and has an assembly structure that allows for the replacement of double-glazed glass plates, making repairs easier and easier. The purpose of the present invention is to provide a refrigerator door that can improve assembly workability and reduce costs by reducing the number of parts.

In addition, the refrigerator door has a door structure that prevents leakage when filling with foam insulation material, and a recessed handle structure that overcomes the disadvantage of thinning the insulation thickness at that point. It is.

(d) Means for Solving the Problems The refrigerator door of the present invention has a frame-shaped door frame with a sash to which a magnetic clay-type gasket can be fixed, fitted to the inner periphery of the back opening which is larger than the front opening of the frame-shaped door frame. At the same time, a double-glazed glass plate with a packing fitted to the edge thereof is fitted into the front opening of the door frame, and a gap between the double-glazed glass plate and the door frame is filled with foam, A door panel is provided to cover the exposed surface of the heat insulating material exposed in a frame shape between the sash and the banking, and the door panel is inserted between the grooves of the sash and the packing, which are provided facing each other. It is fixed.

Further, each of the four corners of the outer periphery of the door panel is tapered with the same inclination angle, and the four corners formed by the cut surfaces are obtuse-angled.

In addition, a satsush is attached to the inner periphery of the door frame, and a packing is attached to the outer periphery of the double-glazed glass plate that is fitted into the opening of the door frame, and a packing is attached to the inner periphery of the sash and the outer periphery of the packing. Elastic fins that face each other and extend diagonally upward are integrally formed, and a double-glazed glass plate is placed inside the door frame, set in the lower mold of a foaming jig, and combined with this lower mold. When the upper mold is used to foam and fill the gap between the door frame and the double-glazed glass plate with a heat insulating material, the tips of the fins are brought into close contact with the surface of the upper mold jig.

Furthermore, in a refrigerator door in which the door handle is provided in a recessed part formed on one side of the door body to minimize the degree of protrusion from the door surface, a heat insulating protrusion that protrudes to the back side is provided at a portion facing the handle. It was established.

(E) Place a double-glazed glass plate in the opening of the working door frame, fit a satshu around the inner periphery of the door frame opening, fit packing around the outer periphery of the double-glazed glass plate, and use a foaming jig. After filling the gap between the door frame and the double-glazed glass panel with a heat insulating material using a heat insulating material, the exposed surface of the heat insulating material is covered with a door panel. The outer edge of the door panel is fitted into the groove provided in the sash, and the inner edge thereof is fitted into the groove provided in the packing to complete the assembly of the door. If the glass plate is damaged, removing the door panel will allow the glass plate to be taken out and replaced.

The four corners of the outer periphery of the door panel are made obtuse-angled so that the door panel can be smoothly inserted between the grooves of the sash and the packing. In addition, elastic soft fins are integrally provided facing upwards on the inner edges of the sash and packing, so that when the upper mold is combined with the lower mold of the foaming jig, the tip of the fin is attached to the upper mold. Close to the surface to prevent urethane from leaking.

Furthermore, when the handle is embedded in a recess on one side of the door so that it does not protrude too much from the door surface, the part facing the handle is It is formed into a heat insulating protrusion that protrudes to the back side.

(f) Example Embodiments of the present invention will be described below based on the drawings.

FIG. 1 shows an external view of a refrigerator-freezer that is mainly used for commercial purposes and has a plurality of compartmented storage compartments. In the figure, doors 1, 1, . It has a structure with a transparent window section made up of a double-glazed glass plate 3, and a handle 4 provided on the - side.
Each of the doors 1, 1, . . . can be opened and closed in a double-sided manner. In addition, the door body IA that fits and supports the double-glazed glass plate 3
The parts are filled with foamed heat insulating material such as urethane.

The handle 4 has a recess formed on one side of the nose surface so that the handle 4 does not protrude too much from the door surface so as not to receive external shocks, and so that fingers can smoothly enter and maintain ease of grip. It is an embedded type handle provided in part 5. In this case, since the thickness of the heat insulation at a certain part of the handle 4 is usually structurally thinner than at other parts, there is a problem in that dew condensation occurs on the handle part. In addition, in the conventional structure, if the insulation thickness of the handle part was used as the standard for ensuring dew condensation performance, other parts would become unnecessarily thick, resulting in a waste of urethane, etc., but in the present invention,
Improvements have also been made in this respect. The details will be described later.

Next, the structure of the door 1 of the present invention will be explained, including its manufacturing and assembly method.

An external view of only the door 1, seen from the front side, is shown in Fig. 2, and as seen from the back side, is shown in Fig. 3. Further, FIG. 4 shows an exploded perspective view of each component constituting the door 1.

The door 1 has a metal door frame 10, as can be seen in FIG.
, a resin sash 13 fitted to the inner peripheral edge of the back side opening 11 of the door frame 10 , a double-glazed glass plate 3 made by laminating a plurality of glass plates at small intervals, and this double-glazed glass plate 3 a rubber packing 14 fitted to the peripheral edge of the door frame 10; and a resin door panel 15 fitted around the double-glazed glass plate 3 fitted into the rear opening 12 of the door frame 10; It also includes a magnet built-in gasket 16 which is attached to the sash 13 and keeps the main body 2 and door 1 airtight.

To further explain each of the above components and their related structure with reference to FIGS. 5 to 14, the door frame 1o has a front flange 20A and a shorter rear flange 208, so that the door frame 1o is formed by the front flange 2OA. The back side opening 1 formed by the rear flange 20B is compared to the back side opening 12 formed by the rear flange 20B.
1 is - around larger.

As is particularly well understood in FIG. 11, the resin sash 13 is fitted into the entire back side opening 11 of the door frame 10 by inserting the fitting groove 21 into the rear flange 20B. Further, this sash 13 is provided with a mounting groove 23 for mounting a gasket 16 with a built-in magnet 22, and a mounting protrusion 24 on the side of the gasket 16 is fitted into this mounting groove 23 to be mounted.

Furthermore, a groove 25 is provided on the inner periphery of the gasket 16, into which the outer edge of the door panel 15 is evenly fitted.

On the other hand, the double-glazed glass plate 3 having a rubber packing 14 fitted to its peripheral end face is fitted into the back side opening 12 of the door frame IA. At this time, the double-glazed glass plate 3 has a lower protruding portion 14B of the packing 14 at the raised edge 2 provided on the front flange 20A.
6 and is positioned. Also.

The inner edge of the upper protruding portion 14A of the paso king 14 is tapered so that a groove 27 is formed in the rubber packing 14 to correspond to the groove 25 on the sash 13 side. 30 is a door frame 1 that is made of a heat insulating material such as urethane and has a sash 13 attached using a foaming jig consisting of an upper mold and a lower mold.
0 and the double-glazed glass plate 3 fitted inside the door frame 10 is filled with foam. In this way, the foam insulation material 30 attaches the door frame 10 to the door frame 10. The double-glazed glass plates 3 are combined together to form a door main body 1^.

Finally, the door panel 15 is attached so as to cover the exposed surface of the heat insulating material 30. A sticky sealing material 31 is fixed to the inner space of the door panel 15. This adhesion is done by attaching the outer peripheral edge of the door panel 15 to the sash 13.
and the inner circumferential edge thereof is inserted into the groove 27 of the packing 14 to attach it.

In this way, the door panel 15 is attached by being inserted between the grooves 25 and 27 of the sash 13 and the packing 14. At this time, in order to facilitate the insertion, the door panel 15
As shown in Fig. 12, the four corners of the outer periphery of 5 have notches 32,
32 are provided. As a result, the corner portion of the door panel 15 is smaller than the right-angled corner portion, and a gap is created between the corner portion of the door panel 15 and the corner portion of the sash 13, making it possible to perform the insertion work even more smoothly.

Thereafter, screws 34 are inserted into the O-shaped notch grooves 33, 33, . . . as shown in FIG. In addition, by adjusting the fitting dimensions of the sash 13 and the door panel 15, it is possible to reduce or eliminate the number of screws 34, and the effect of further facilitating the work can be expected.

In this way, when the door panel 15 is finally inserted between the grooves 25 and 27 of the sash 13 and the packing 14, the assembly of the door 1 is completed. With this structure, the door panel 15 can be easily removed, so when the door panel 15 is removed, the double-glazed glass plate 3 can also be pulled out upward. Therefore, when the double-glazed glass plate 3 is damaged, the double-glazed glass plate 3 can be reused by replacing only the double-glazed glass plate 3 without replacing the entire door 1, and a reduction in repair costs can be expected.

By the way, as shown in the cross-sectional view of FIG. 8, the thickness of the heat insulating material 30 is thinner in a certain part of the handle 4 than in other parts, but in the present invention, the thickness of the heat insulating material 30 is made to approximate that of other parts. A heat insulating protrusion 30A is formed to protrude from the top.

As a result, the heat insulation thickness of the handle portion can be increased, the dew condensation performance of the handle portion can be improved, and the overall heat insulation thickness can be made uniform.

Here, as described above, the method for foam filling the heat insulating material to form the heat insulating protrusion 30A protruding on the back side of the handle part is described in the 15th method.
This will be explained according to FIGS. 18 to 18. Foam structure door body IA
is foamed through an upper mold 40 and a lower mold 41 which are foaming jigs. In this case, the upper mold 40 facing the handle 4 is provided with four parts 42 as shown in FIG. 17 and the like. by this,
In the door body IA, a heat insulating protrusion 30A that faces the handle and protrudes to the back side is formed at the part where the handle is located, so that the heat insulating thickness of the handle 4 can be increased. The protruding state of the heat insulating protrusion 30A can be better understood from FIG.

Furthermore, when foaming, conventionally, a foaming jig of 40°41
In areas where urethane is directly formed (for example, the packing 14 and the sash 13), urethane leakage occurs at least a little from the gap between the jig and the member, and a great deal of effort is required to deal with it. Therefore, in the present invention, a foamed structure is adopted in order to prevent such urethane leakage. This will be explained with reference to FIGS. 17 and 18. That is, as shown in FIG. 17, the sash 13 and the packing 14 are provided with soft fins 45, 413 facing upward. In this state, lower the jig upper mold 40 as shown in the arrow and
611 <Jig upper mold 40. When the lower mold 41 is combined, the fins/15. Since the tip of the /16 comes into close contact with the jig upper mold 4o due to its own restoring elasticity, urethane leakage from this area can be prevented during foam filling.

In this way, by providing the soft fins 45, 46 on the constituent members on both sides of the portion directly formed of urethane, that is, the sash 13 and the packing 14, the jigs 40, 41
By constructing the structure in which the fins 45 and 46 are in close contact with the jig surface in the set state, urethane leakage can be easily prevented without the need for a seal member or the like.

However, if these fins 45 and 46 were not present, a gap would be created between parts a and b due to variations in processing and assembly of the foam member, causing urethane leakage, and the urethane would be Jj%
It is conceivable that it may become clogged in the groove 25 of the sash 13 where the wheel is attached and the groove 27 of the packing 14, and a great deal of effort is required to remove it.

(G) Effects of the Invention As described above, according to the present invention, the door panel is attached to the foamed refrigerator door having a glass window portion afterward, and the door panel is made removable. The glass plate can be easily replaced, and when the glass plate breaks, unlike conventional methods,
This eliminates the need to replace the entire door with a new one, making it more economical.

In addition, by making the four corners of the outer periphery acute-angled,
The door panel can be easily inserted between the grooves of the sash and the banking, making assembly very easy.

Urethane leakage during foam filling of the heat insulating material can be easily prevented by preventing gaps from forming between the sash and the packing and the jig surface using elastic fins provided integrally with the sash and packing.

Furthermore, even if the handle part of the door is recessed, by protruding a heat insulating material protrusion from the back side of the part facing the handle part, the thickness of the heat insulating material can be prevented from becoming thinner at the handle part, and can be made to have the same thickness as other parts. This has many effects, such as improving the dew condensation on the handle.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the exterior of the commercial refrigerator, Fig. 2 is a perspective view of the front of the refrigerator door, Fig. 3 is a perspective view of the refrigerator door from the back, and Fig. 4 is a diagram of the components of the refrigerator door. An exploded perspective view, FIG. 5 is a front view of the refrigerator door, FIG. 6 is a sectional view taken along line AA in FIG. 5, and FIG. 7 is a sectional view taken along line B-8 in FIG. 5.
Fig. 8 is a sectional view taken along the line C-C in Fig. 5, Fig. 9 is a sectional view taken along the line DD in Fig. 5, and Fig. 10 is a sectional view taken along the line E--
C sectional view, Fig. 11 is an enlarged view of F part in Fig. 7,
Figure 12 is a partial plan view of the door panel, Figure 13 is a sectional view of G-C in Figure 12, and Figure 14 is F in Figure 12.
-F cross-sectional view, Fig. 15 is a cross-sectional view showing a state in which a foaming jig is used to fill the insulation material, and Fig. 16 is a foaming jig in a portion where a heat insulating projection protruding to the back side facing the handle part is formed. FIG. 17 is an explanatory diagram showing the insulation material leakage prevention structure during foaming in relation to the foaming jig;
FIG. 8 is an explanatory diagram showing a situation in which the upper and lower molds of the foaming jig are combined to prevent leakage of the insulation material during foaming. ]...Door, 3...Double-glazed glass plate, 4...Handle, 5
Recessed portion, 10... Door frame, 11... Back side opening, 12...
・Front side opening, 13...Sash, 14...Packing, 15.Door panel, 16...Gasket with built-in magnet, 25...Groove provided in the sash, 27...Groove provided in the packing, 30.・Insulation material, 30A...Insulation protrusion, 3
2.32...Notch, 40...Upper mold, 41...Lower mold, 4
2... Concavity. Agent Patent Attorney Crest 1) Makoto

Claims (4)

[Claims] (1) A sash capable of attaching a gasket with a built-in magnet is fitted to the inner circumferential edge of the back opening, which is larger than the front opening of the frame-shaped door frame. A double-glazed glass plate with packing fitted thereon is fitted, and a heat insulating material is foam-filled into the gap between the double-glazed glass plate and the door frame, and this heat-insulating material is placed between the sash and the packing. A door structure for a refrigerator comprising a door panel that covers an exposed surface exposed in a frame-like form, and the door panel is inserted and fixed between the grooves of the sash and the packing, which are provided facing each other. (2) A patent characterized in that each of the four corners of the outer periphery of the door panel is notched in a tapered shape at the same angle of inclination, and the four corners formed by the notched surfaces are obtuse-angled. A refrigerator door structure according to claim 1. (3) A sash is attached to the inner periphery of the door frame, and a packing is attached to the outer periphery of the double-glazed glass plate that is fitted into the opening of the door frame, and the inner edge of the sash and the outer edge of the packing are attached. Elastic fins that face each other and extend diagonally upward are integrally formed, and the double-glazed glass plate is placed inside the door frame and set in the lower mold of a foaming jig, and then combined with this lower mold. When foaming and filling a gap between a door frame and a double-glazed glass plate with a heat insulating material using an upper mold, the tip of each fin comes into close contact with the upper mold jig surface. door structure. (4) In a refrigerator door in which the door handle is provided in a recess formed on one side of the door body to reduce the degree of protrusion from the door surface, a heat insulating protrusion protrudes to the back side at a portion facing the handle. A refrigerator door structure characterized by being provided with.