JP2604248B2 - Insulated box connection structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Industrial application field The present invention relates to a heat insulating box which is formed by connecting an outer box and an inner box by a connection frame and filling a foam insulating material between the two boxes. The present invention relates to improvement of a connection structure of a heat insulating box.

(B) Conventional technology As a conventional technology, Japanese Utility Model Publication No. 1-10731 discloses a connection structure of a heat insulating box such as a refrigerator including a connection portion of an outer box, a connection portion of an inner box, and a connection frame. A bent portion formed at an end of a connection portion of a box, an outer end portion forming a step formed at a connection portion of the inner box, and a member engaged with the outer end portion formed at the connection frame. A stop portion, provided on the connection frame,
A first joining member having a portion extending in parallel with the main body portion and having a claw portion formed at an end thereof to engage with the bent portion; and a substantially mountain-shaped, A second joining member having a crest joined to the inner surface of the connecting portion, wherein the first joining member is pressed against the outer box and the second joining member is pressed against the inner box by foaming of a foaming agent. A connection structure of a heat insulating box such as a refrigerator is disclosed.

(C) Problems to be Solved by the Invention The first and second joining members according to the related art function to prevent leakage of the foaming agent. When the claw portion of the first joining member separates from the bent portion or the crest of the second joining member separates from the inner box depending on how the force of the agent is applied, the foaming agent leaks from between them, and this foaming agent However, since the connection frame is simply in surface contact with the surface of the connection portion of the outer box and the surface of the connection portion of the inner box, there is a great risk of leakage from the contact portion.

The present invention has been made in view of such problems of the prior art, and provides a connection structure of a heat insulating box for the purpose of more reliably preventing leakage of a foaming agent from a connection portion between an outer box and an inner box. is there.

(D) Means for Solving the Problems In order to achieve the above object, the present invention provides a connection for connecting both boxes to a connection flange portion of an outer box and a connection flange portion of an inner box which are arranged on substantially the same plane. In a heat insulating box body having a frame mounted and filled with a foamed heat insulating material between the two boxes, the connection frame is engaged with a bent portion formed at an end of a connection flange portion of the outer box. A first joining portion having a joint portion and forming a cutout portion having a thickness smaller than that of the other portion at the base, a second joining portion joining to the back surface of the connection flange portion of the inner box, A plurality of ribs abutting on the surface of the connection flange portion of the outer box and a plurality of ribs abutting on the surface of the connection flange portion of the inner box, each comprising a connection frame main body formed on the back surface; There is a large space between the connection flange of the outer case and the upstream side of the flow of the foaming liquid. The middle portion, a small space portion on the downstream side, and a large space portion on the upstream side of the flow of the foaming liquid, between the connection frame and the connection flange portion of the inner box,
This is a connection structure of heat-insulating boxes each having a small space defined on the downstream side.

(E) Operation According to the connection structure of the present invention, since the engaging portion is pushed with the notch portion of the first joint portion as a fulcrum by the foaming force, the engagement between the engaging portion and the bent portion of the connection flange portion is prevented. It becomes more robust and can prevent leakage of the foaming liquid. Also, even if the first joint is separated from the bent portion of the outer box, or the second joint is separated from the back surface of the connection flange of the inner box, and the foaming agent leaks from the joint, the action of the plurality of spaces is possible. Thus, even if the foam is in the first space, the foam is in the next space, and the viscosity increases to prevent the foam from flowing and the leakage of the foaming agent is prevented.

(F) Example An example of the present invention will be described below with reference to the drawings. FIG. 1 is an essential part cross-sectional view showing the connection structure of the heat insulation box of the present invention in FIG. 1;
FIG. 2 is a perspective view of a refrigerator having a partially opened door for implementing the connection structure of the present invention, and FIG. 3 is a cross-sectional view showing a connection state of a connection frame. , An outer box (2) made of a metal such as stainless steel, an inner box (3) also made of a metal such as stainless steel and defining a storage room such as a refrigerator compartment or a freezer compartment, and both boxes (2) and (3). ) Are connected by a front opening, and a foamed section material (5) in which the space between the two boxes (2) and (3) is filled with a foaming liquid and solidified, and the front face thereof is formed. An opening / closing door (6) is rotatably provided in the opening.

Thus, the outer box (2) has a connection flange portion (2A) bent inward, and has a bent portion (2B) having its end bent outward in a V-shape. ing. On the other hand, the inner box (3) has a connection flange (3A) which is bent outward and is arranged substantially flush with the connection flange (2A) of the outer box (2). .

The structure of the connection frame (4) for connecting the outer box (2) and the inner box (3) before the foaming operation extends from the connection frame body (4A) and the back surface of the frame body (4A). Joint (4
B) is composed of a first joint (4C) extending outward from the end and a second joint (4D) extending in the opposite direction to the joint (4C). ) Is disposed between both connection flanges (2A) and (3A), and the flange (2A)
The opening formed between A) and (3A) is closed, and the outer box (2)
Three ribs (4E), (4F), and (4G) that abut on the connection flange (2A) are spaced from each other on the back surface of the frame body (4A) facing the connection flange (2A). The three ribs (4H), (3H), which are also formed on the back surface of the frame body (4A) facing the connection flange portion (3A) of the inner box (3), contact the connection flange portion (3A). 4I) and (4J) are formed at intervals. Further, the first joining portion (4C) has an engaging portion (4K) for engaging with the bent portion (2B) at a tip portion, and a projecting piece (4L) on the back surface of the intermediate portion. In addition, an R-shaped notch (4M) for reducing the thickness of the first joint (4C) is formed at a corner where the joint (4B) and the first joint (4C) intersect. . Further, the distance between the second joint portion (4D) and the connection frame body (4A) is reduced inward, and the inner box (3) is located between the ribs (4H), (4I), and (4J). (4N) for holding the connection flange (3A).

These are integrally formed by extrusion molding of a resin such as hard vinyl chloride. When the outer box (2) and the inner box (3) are connected by the connecting frame (4), the connection flange portion of the outer box (2) is formed. On the surface side of (2A), a first space (7), a second space (8) and a third space (9) are defined from the inner box to the outer box, and the inner box (3) is formed. ) Connection flange (3
A fourth space portion (10), a fifth space portion (11), and a sixth space portion (12) are defined on the surface side of A) from the outside toward the inside.

In the above configuration, when the foaming liquid is injected into the space between the outer box (2) and the inner box (3), the foaming force of the foaming liquid becomes the third.
As shown by arrows in the figure, the first joint (4C) acts on the first joint (4C) and the second joint (4D), and the joint (4C) at the tip of the first joint (4C).
K) engages with the bent portion (2B). At this time, the foaming force can be sufficiently received at the corners of the projecting piece (4L) and the first joint (4C). Moreover, the first joint (4C) is a notch (4M)
Because it is easy to bend at the portion, the engaging portion (4K) is more firmly engaged with the end of the bent portion (2B). On the other hand, the holding portion (4N) of the second joining portion (4D) is strongly pressed against the back surface of the connection flange portion (3A) of the inner box (3).

Originally, the leakage of the foaming agent can be prevented by the above configuration. However, depending on the variation of the foaming force, the direction of the foaming force, and the like, sometimes, as shown in FIG.
When the engaging portion (4K) is separated from the opening, the foaming liquid leaks from the gap (13) formed at this time into the first space (7). First
The foaming liquid that has leaked into the space (7) is almost foamy, and the foaming liquid that has passed through the first space (7) pushes up the ribs (4E) to form the next liquid. As it leaks into the second space portion (8) or the third space portion (9) smaller than the first space portion (7), the viscosity increases and the flow stops, and the foaming agent becomes almost foamy. There is no fear of leaking outside. As described above, the size of the plurality of spaces formed between the connection frame (4) and the connection flange (2A) of the outer box (2) is increased by increasing the space on the upstream side of the flow of the foaming liquid, and increasing the space on the downstream side. By reducing the space on the side, it is possible to appropriately respond to changes in the foaming liquid. Similarly, the foaming liquid that has leaked into the fourth space (10) is almost foamy, and the foaming liquid that has passed through the fourth space (10) pushes up the ribs (4H). Next, the fourth space part (10)
Fifth space part (11) or sixth space part (12) smaller than
As it leaks, the viscosity increases and it stops flowing,
There is no fear that the foaming agent almost becomes a foam and leaks out. As described above, the size of the plurality of spaces formed between the connection frame (4) and the connection flange portion (3A) of the inner box (3) is increased by increasing the size of the space on the upstream side of the flow of the foaming liquid. By reducing the space on the side, it is possible to appropriately respond to changes in the foaming liquid.

(G) Effects of the Invention As described above, the present invention makes it easier for the engaging portion to be pushed with the notch portion of the first joint portion as a fulcrum due to the foaming force. Engagement becomes stronger,
This has the effect of preventing leakage of the foaming liquid. Also, if the foaming liquid leaks from the negative between the outer box and the first joint and between the inner box and the second joint, a large space is formed on the upstream side of the foaming liquid and a small space is formed on the downstream side. Due to the provision, the liquid foaming liquid flows into the large space and foams sufficiently in this large space, so the viscosity of the foaming liquid increases and the leakage of the foaming liquid to the small space is prevented as much as possible. it can. Further, since the leakage into the small space portion pushes up the rib to leak, the rib also helps prevent the foaming liquid from leaking into the small space portion. Even if the foaming liquid leaks into the small space, it hardly leaks when the foaming liquid leaks into the small space because foaming of the foaming liquid is progressing.

As described above, the size of the plurality of spaces formed between the connection frame and the connection flange portion of the outer box is increased by increasing the size of the upstream side of the flow of the foaming liquid and decreasing the size of the downstream side, thereby forming a foam in the large space. Since the foaming of the liquid is promoted and the foaming liquid can be formed into a foam, the foaming liquid does not leak to the space on the downstream side as much as possible. Even if it leaks, the foam is formed in a large space, so the amount of leakage is small, and as a result, the foaming liquid can be prevented from leaking from between the connection frame and the outer box. Can appropriately respond to changes in the foaming liquid.

As for the connection frame and the inner box, as described above, the size of the plurality of spaces formed between the connection frame and the connection flange of the inner box is set to be larger on the upstream side of the flow of the foaming liquid and smaller on the downstream side. Since the size is reduced, the operation and effect appropriately responding to the change of the foaming liquid at the time of the injection are exerted.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part showing a connection structure of a heat insulating box of the present invention, FIG. 2 is a perspective view of a refrigerator implementing the connection structure of the present invention, and FIG. 3 shows a connection state of a connection frame of the present invention. Sectional view shown,
FIG. 4 is a sectional view of an essential part for explaining a state of foam leakage. (2) ... outer box, (2A) ... connection flange, (2B) ...
… Bent part, (3)… Inner box, (3A)… Connection flange part, ( 4 )… Connection frame, (4A)… Connection frame body, (4C)
... 1st joint, (4D) ... 2nd joint, (4E), (4
F), (4G), (4H), (4I), (4J) ...
(7), (8), (9), (10), (11), (12) ...
Space department.

Claims (1)

(57) [Claims] 1. A connecting frame for connecting both boxes is mounted on a connecting flange portion of an outer box and a connecting flange portion of an inner box arranged on substantially the same plane, and a foam insulating material is filled between the two boxes. In the configured heat-insulating box, the connection frame has an engagement portion that engages with a bent portion formed at an end of the connection flange portion of the outer box, and has a thickness smaller than other portions at the base. A first joining portion formed with a notch portion, a second joining portion joined to the back surface of the connection flange portion of the inner box, a plurality of ribs abutting on the surface of the connection flange portion of the outer box, and the inner joint; A plurality of ribs abutting on the front surface of the connection flange portion of the box, and a connection frame body formed on the back surface, respectively, and between the connection frame and the connection flange portion of the outer box, the flow of the foaming liquid; A large space on the upstream side, a small space on the downstream side, and a connection franc between the connection frame and inner box It is between parts, the connection structure of the bubbling liquid large space portion on the upstream side of the flow, the insulating box body, characterized in that a small space on the downstream side forms respectively image.