JP3188091B2 - Thermal insulation box and method of manufacturing thermal insulation box - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat insulating box in which a foam heat insulating material is filled between inner and outer boxes and a method for manufacturing the heat insulating box.

[0002]

2. Description of the Related Art Conventionally, this kind of heat insulating box is, for example,
The space between the inner and outer boxes was filled with a foamed heat insulating material by a method as described in JP-A-31072 (F25D23 / 08). That is, in the case where the foamed heat insulating material is filled up to now, with the opening of the heat insulating box facing downward, the undiluted solution of the foamed heat insulating material is injected into the space between the inner and outer boxes from the inlet formed on the bottom surface of the outer box. A so-called rotary foaming machine that turns the opening upward by turning over after foaming has been used, but its work efficiency has become a problem, and in recent years, as in the above-mentioned publication, the opening of the heat insulating box has A fixed foaming machine called a so-called SF foaming method, in which a stock solution of foamed heat insulating material is injected into a space between the inner and outer boxes in a state where the foaming heat insulating material is directed, has been used.

[0003]

However, when the undiluted solution is injected by such a fixed-type foaming machine, the injection must be performed from the side. An inlet was formed. Therefore, in the heat-insulated box in which the entire side surface of the outer box is exposed, the appearance is remarkably impaired, and the undiluted solution goes straight to the inner wall surface of the outer box facing the injection port due to the discharge pressure at the time of injection. It was difficult to spread the foam insulation evenly in the space between the boxes.

Further, for example, as in Japanese Utility Model Publication No. 62-25668 (F25D23 / 08), the outer box has a curved surface shape, and when the injection must be performed from the curved surface portion, the injection operation itself is extremely difficult. There was also a problem.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional technical problem, and can improve the workability of filling a foamed heat insulating material without impairing the appearance of the heat insulating box. It is an object of the present invention to provide a method for manufacturing a body and a heat insulating box.

[0006]

That is, the heat insulating box according to the first aspect of the present invention is filled in the outer box, the inner box, and the space between the two boxes.
And an opening formed on the bottom surface of the outer box.
An injection portion communicating with a space between the inner and outer boxes,
An injection guide internally provided with an injection passage communicating with the part,
A makeup frame connecting the upper ends of the inner and outer boxes, and
Has an inclined surface descending from the injection portion and faces the inclined surface.
Injection for undiluted solution injection of the foam insulation material opened to the side
A mouth is formed and the decorative frame is opened upward.
An inner hollow cylinder is attached, and the inner and outer cylinders are attached to the cylinder.
A through hole communicating with the space between the two boxes is formed, and the through hole is
That it is covered with open-cell sealing material from the space side
Features.

The heat insulating box according to the invention of claim 2 is an outer box.
And foam insulation filled in the inner box and the space between the two boxes
And an opening formed in the bottom surface of the outer box, and the inner and outer boxes
An injection part communicating with a space between the injection part and an injection part communicating with the injection part
An injection guide with a channel inside, and the upper ends of the inner and outer boxes
A makeup frame to be connected, and
A slope that descends from
And an inlet for injecting a stock solution of the foamed heat insulating material is formed.
At the same time, the decorative frame has an upward
A through-hole that opens is formed, and the through-hole is a space between the inner and outer boxes.
It is featured that it is covered with an open-cell sealing material from the
Sign.

Further, a method of manufacturing the heat insulating box according to the third aspect of the present invention.
The method is to connect the upper ends of the inner and outer boxes with a makeup frame ,
An inner hollow cylinder that opens upward is attached to the frame.
The body has a through hole communicating with the space between the inner and outer boxes,
When the through-hole is covered with a continuous-cell sealing material from the space side,
In both cases, the injection part communicating with the space between the inner and outer boxes is
An opening is formed in the bottom of the box, and communicates with the injection section from the injection section.
A downwardly inclined surface and a side opening facing the inclined surface
An injection path having an inlet is formed.
It is characterized by injecting a stock solution of heat material.

A method for manufacturing the heat insulating box according to the fourth aspect of the present invention.
The method is to connect the upper ends of the inner and outer boxes with a decorative frame,
Has a through hole that opens upward to attach the cylinder
The through-hole is formed in the space between the inner and outer boxes from the side of the space between the two boxes.
While covering with a metal material and communicating with the space between the inner and outer boxes.
An injection part is formed in the bottom of the outer box with an opening, and is connected to the injection part.
Through the inclining surface descending from the injection section and facing the inclined surface
Forming an injection path having an injection port that opens laterally,
It is characterized by injecting the undiluted solution of foam insulation from the inlet.
You.

According to the present invention, a laterally opened injection port is provided.
The undiluted foam insulation material injected from the
And is directed upward, from inside and outside of the injection part on the bottom of the outer box.
It is discharged into the space between both boxes. Therefore, inject into the bottom of the outer box
Part with the opening of the heat insulation box facing up
In addition, the injection of undiluted solution can be performed from the side.
Of foam insulation without damaging the appearance of the insulation box.
Filling efficiency can be significantly improved.

[0011] Also, the upper surface from the injection portion hits the inclined surface.
The undiluted solution discharged into the space between the inner and outer boxes hits the slope.
At the same time, and then hit the bottom of the inner box
Is more diffused, so injection
Eliminates the inconvenience of unbalanced stock solution due to discharge pressure
The foam insulation is evenly distributed in the space between the inner and outer boxes.
Can be filled.

In particular, by means of foam insulation which grows after injection
Air between the inner and outer box, which is expelled upwards, through a sealing material
To the outside through the through hole of the cylinder or the through hole of the decorative frame.
Will be discharged. Therefore, a special air vent hole is formed.
Used to support the support of the advertising board without forming
To be used as a cylindrical body or a through hole for attaching it
To release air between the inner and outer boxes,
The number can be reduced and the appearance can be improved.

[0013]

Next, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view of an open-top storage R to which the present invention is applied, FIG. 2 is a lower perspective view of a heat-insulating box 1 of the storage R, FIG. FIG. 2 is a vertical side view of the upper end of the heat insulating box 1. The storage room R has a unit room Y under the heat-insulating box 1 opened to the upper surface.
, And a compressor and other refrigerators (not shown) are installed in the unit room Y.

The heat-insulating box 1 includes a metal inner box 2 having an open upper surface and a hard synthetic resin outer box 3 also having an upper surface opened.
And a decorative frame 4 made of hard synthetic resin also serving as a handrail for connecting the upper edges of the inner and outer boxes 2 and 3, and a space formed by the inner and outer boxes 2 and 3 and the decorative frame 4. And a foam insulation material 5 such as foamed polyurethane. Inside the heat insulating box 1, the inside 6 is defined by the inner box 2, and the inside 6 is cooled by a meandering cooling pipe 7 provided on the outer surface of the inner box 2.

The decorative frame 4 is provided with a plurality of through holes 11 and is fixed to the outer box 3 by a protector 12. Reference numeral 15 denotes a bottomed cylindrical synthetic resin cylindrical body for supporting a pillar (not shown) such as an advertising board or a sunshade, and a flange 15A having an outer diameter larger than the inner diameter of the through hole 11 at the upper end as shown in FIG. In addition, a screw portion 15B is formed on the outer periphery below the flange 15A, and a through hole 15C communicating the inside and outside of the cylindrical body 15 is formed integrally below the screw portion 15B.

On the other hand, nuts 17 are attached to the inside of the decorative frame 4 so as to correspond to the through-holes 11.
The cylindrical body 15 is attached to the decorative frame 4 in advance by screwing B. Further, a sealing material 16 made of open-cell maltprene or the like is attached around the outer surface of the through hole 15C of the cylindrical body 15 to cover the through hole 15C.

On the other hand, as shown in FIG.
A rectangular injection part 12 is formed in the center at a position deviated to one side in the longitudinal direction.
It communicates inside and outside the space between them. Reference numeral 14 denotes a foam guide, which is formed of a material that can be easily cut, such as styrene foam. As shown in FIG. 6, the foaming guide 14 has an inlet 21 which is opened laterally on one side surface,
An injection path 24 extending horizontally from the injection port 21 and further having a rectangular discharge port 23 which is upwardly inclined on the inclined surface 22 in the traveling direction and opened upward at the upper surface of the other end. The inclined surface 22 is provided at the injection port 21.
At a predetermined angle.

When filling the space between the inner and outer boxes 2 and 3 with the foam insulating material 5, first, the injection guide 14 is used.
With the injection port 21 facing the injection section 12 on the bottom surface 3A of the outer box 3 in the direction of the side surface 3B of the outer box 3.
Is inserted into the injection part 12 from below. At this time, the discharge port 2
The shape of 3 is set as a size that just fits in the injection part 12,
Thus, the injection guide 14 around the discharge port 23 is brought into close contact with the bottom surface 3A around the injection section 12. In addition, injection guide 1
A step-like step portion 25 is formed and placed on the upper surface of one end of 4,
The step 25 is addressed to the corner of the outer box 3 as shown in FIG.

Then, the decorative frame 4 is set up, that is, the opening of the heat-insulating box 1 is set up and set in a jig of a fixed-type foaming machine (not shown). In this state, the injection port 2 of the injection guide 14 is
1 is opened laterally below the side surface 3B of the outer box 3. Next, when the stock solution of the foamed heat insulating material 5 (urethane stock solution) is injected from the injection port 21 from the side as shown by the dashed arrow in FIG.
The injected stock solution hits the inclined surface 22 of the injection guide 14 via the injection path 24, is directed obliquely upward, and is discharged from the injection portion 12 on the bottom surface 3 </ b> A of the outer box 3 into the space between the inner and outer boxes 2, 3. .

The undiluted solution discharged into the space between the inner and outer boxes 2 and 3 is diffused in the front and rear and right and left directions as indicated by broken arrows in FIGS. 7 and 8 on the bottom surface 2A of the inner box 2 and directed toward the side walls 3B and 3C. . Then, the foamed heat insulating material 5 grows toward the decorative frame 4 at the upper end as shown in FIGS. 3 and 4 while gradually hardening. In the course of this growth, the air between the inner and outer boxes 2 and 3 is gradually expelled upward, enters the cylindrical body 15 through the sealing material 16 as shown by the arrow in the figure, and is discharged from the upper end to the outside. Therefore, without forming a special air vent hole, air can be vented between the inner and outer boxes 2 and 3 by also using the cylindrical body 15 used to support the pillars and the like of the advertising board. And the appearance can be improved.

As described above, the space between the inner and outer boxes 2, 3 (and the decorative frame 4) is filled with the foamed heat insulating material 5 to complete the heat insulating box 1. After the filling of the foam insulating material 5 is completed, the foam guide 14 is cut off by a cutter or the like, and is removed from the heat insulating box 1. Further, the injection section 12 on the bottom surface 3A is concealed by attaching the unit room Y to the lower portion of the heat insulating box 1 thereafter.

As described above, according to the present invention, the injection of the undiluted solution is performed from the side even when the injection portion 12 is formed on the bottom surface 3A of the outer box 3 and the opening of the heat insulating box 1 is directed upward. Therefore, the efficiency of filling the foamed heat insulating material 5 can be significantly improved without impairing the appearance of the heat insulating box 1.

In particular, the undiluted solution discharged from the injection section 12 into the space between the inner and outer boxes 2 and 3 on the inclined surface 22 of the injection guide 14 starts to be diffused when it hits the inclined surface 22, and thereafter, Since the liquid is further diffused on the bottom surface 2A of the inner box 2, the disadvantage that the undiluted solution is biased by the discharge pressure at the time of injection as in the conventional case is also solved,
The space between the inner and outer boxes 2 and 3 can be evenly and uniformly filled with the foamed heat insulating material 5.

Since the inclined surface 22 is oriented in the direction of the side surface 3C of the outer box 3 far from the injection part 12, the stock solution discharged from the injection part 12 is supplied preferentially in the direction of the side surface 3C rather than in the side surface 3B. Will be. Therefore, the space between the inner and outer boxes 2 and 3 can be more uniformly filled with the foamed heat insulating material 5.

Next, FIG. 9 shows another embodiment of the present invention. In this case, an injection guide 14 is integrally formed on the bottom surface 3A of the outer box 3 at the same position as in FIG. That is, the injection guide 14 in this case is a part of the outer box 3 and protrudes downward from the bottom surface 3A at a position deviated to the side surface 3B side. Communicates with the space between the other inner and outer boxes 2, 3.

Further, an injection port 21 opened to the side is formed on one side surface of the side surface 3B of the injection guide 14, and the other side surface facing the injection port 21 is moved in the direction of the side surface 3C of the outer box 3. The inclined surface 22 is inclined to be higher. The upper end of the inclined surface 22 communicates with the injection section 12.

Then, in this case, a cuttable, for example, paper pipe 31 is inserted from the side of the injection port 21, and the stock solution of the foamed heat insulating material 5 is injected into the injection path 24 of the injection guide 14. The injected undiluted solution hits the inclined surface 22 and is directed obliquely upward in the same manner as described above, and thereafter similarly diffuses and fills the space between the inner and outer boxes 2 and 3 uniformly.
After the filling of the foamed heat insulating material 5 is completed, the pipe 31 is similarly cut off with a cutter or the like and removed from the heat insulating box 1.
Further, the injection guide 14 on the bottom surface 3A is thereafter connected to the heat-insulating box 1
Since the unit room Y is similarly concealed by being attached to the lower part of the unit, there is no problem in appearance, and in this case, in particular, the number of parts can be reduced as compared with the above case.

In each of the above embodiments, the cylindrical body 15 is
Although the foamed heat insulating material 5 was filled after the foam insulating material 5 was attached, it may be attached after the filling of the foamed heat insulating material 5 is completed.
In that case, as shown in FIG. 10 and FIG.
The opening on the space side between the inner and outer boxes 2 and 3 is covered with a sealing material 16 and the stock solution of the foamed heat insulating material 5 is injected in that state. The air between the inner and outer boxes 2 and 3 expelled upward with the growth of the foamed heat insulating material 5 passes through the sealing material 16, passes through the nut 17, and is discharged to the outside through the through hole 11. .

Therefore, the air vent between the inner and outer boxes 2 and 3 can be evacuated by using the through hole 11 for attaching the cylindrical body 15 without forming a special air vent hole. Reduction and improvement in appearance can be achieved.
In particular, in this case, it is not necessary to form the through-hole 15C as described above in the cylindrical body 15, and the cylindrical body 15 is thereafter formed by removing the sealing material 16 and the foamed heat insulating material 5 from the through-hole 11 to form the through-hole.
And is attached to the decorative frame 4.

[0030]

As described in detail above, according to the present invention, the lateral
The undiluted solution of foam insulation injected from the injection port opened at
It hits the inclined surface via the injection path, is directed upward, and the bottom of the outer box
It is discharged from the injection part on the surface into the space between the inner and outer boxes. Follow
To form an injection section on the bottom of the outer box and open the heat insulating box.
Do not inject the undiluted solution from the side, even with the mouth facing up.
Without damaging the appearance of the heat insulation box.
To significantly improve the efficiency of the filling work of foam insulation
Can be.

[0031] Also, the upper surface from the injection portion hits the inclined surface.
The undiluted solution discharged into the space between the inner and outer boxes hits the slope.
At the same time, and then hit the bottom of the inner box
Is more diffused, so injection
Eliminates the inconvenience of unbalanced stock solution due to discharge pressure
The foam insulation is evenly distributed in the space between the inner and outer boxes.
It becomes possible to fill in.

In particular, by the foam insulation which grows after injection
Air between the inner and outer box, which is expelled upwards, through a sealing material
To the outside through the through hole of the cylinder or the through hole of the decorative frame.
Will be discharged. Therefore, a special air vent hole is formed.
Used to support the support of the advertising board without forming
To be used as a cylindrical body or a through hole for attaching it
To release air between the inner and outer boxes,
The number can be reduced and the appearance can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a storage to which the present invention is applied.

FIG. 2 is a lower perspective view of the heat insulating box of the present invention.

FIG. 3 is a vertical sectional front view of an upper end portion of the heat insulating box of the present invention.

FIG. 4 is a vertical sectional side view of the upper end of the heat insulating box of the present invention.

FIG. 5 is a perspective view of a cylindrical body.

FIG. 6 is a perspective view of a heat insulating box and an injection guide for explaining a method of manufacturing the heat insulating box of the present invention.

FIG. 7 is a vertical sectional front view of the heat-insulating box and the injection guide for explaining the method of manufacturing the heat-insulating box of the present invention.

FIG. 8 is a lower perspective view of the heat-insulating box and the injection guide for explaining the method of manufacturing the heat-insulating box of the present invention.

FIG. 9 is a longitudinal sectional front view of a heat insulating box for explaining another embodiment of the method of manufacturing the heat insulating box of the present invention.

FIG. 10 is a vertical sectional front view of an upper end portion of a heat insulating box according to another embodiment of the present invention.

FIG. 11 is a vertical sectional side view of the upper end of a heat insulating box according to another embodiment of the present invention.

[Description of Signs] R Storage 1 Insulated Box 2 Inner Box 3 Outer Box 4 Decorative Frame 5 Foamed Insulating Material 11 Through Hole 12 Injection Section 14 Injection Guide 15 Cylindrical 15C Through Hole 16 Sealing Material 21 Injection 22 Slope 24 Injection Road

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-54-85261 (JP, A) JP-A-59-200177 (JP, A) JP-A-4-742286 (JP, U) (58) Survey Field (Int.Cl. ⁷ , DB name) F25D 23/08

Claims (4)

(57) [Claims] 1. A heat insulating box comprising an outer box, an inner box, and a foam insulating material filled in a space between the two boxes, wherein an opening is formed in a bottom surface of the outer box, and a space between the inner and outer boxes is provided. An injection section communicating with the injection section, an injection guide internally provided with an injection path communicating with the injection section, and a decorative frame connecting upper ends of the inner and outer boxes.
Wherein the the injection passage and the inclined surface descending from said injection unit, open said inlet for stock injection of foam insulation and are formed on the side opposite to the inclined surface Rutotomoni, the decorative
An inner hollow cylinder that opens upward is attached to the frame,
A through-hole communicating with the space between the inner and outer boxes is formed in the cylinder
And the through-holes are opened with a sealing material of open cells from the space side.
An insulated box characterized by being covered . 2. An outer box, an inner box and a space between the two boxes.
A heat insulating box comprising: a foamed heat insulating material;
An opening is formed in the bottom of the box, and communicates with the space between the inner and outer boxes.
And an injection portion communicating with the injection portion, provided therein.
An injection guide, and a decorative frame connecting the upper ends of the inner and outer boxes.
And an inclined surface descending from the injection part in the injection path.
And the foamed heat insulating material opened laterally opposite to the inclined surface
And an injection port for injecting a stock solution of
The frame has a through-hole that opens upward for attaching the cylinder.
The through-holes are open cells from the space between the inner and outer boxes.
Insulation box characterized by being covered with a sealing material
body. 3. The upper end of the inner and outer boxes is connected by a decorative frame,
Attached to the decorative frame is a hollow cylindrical body that opens upward.
The cylinder has a through hole communicating with the space between the inner and outer boxes.
Perforated, and the through hole is used as a sealing material for open cells from the space side.
And an injection section communicating with the space between the inner and outer boxes.
An opening is formed in the bottom of the outer box,
The slope descending from the entrance and open sideways facing the slope
Forming an injection path having an injection port to be opened, and
Insulating box characterized by injecting undiluted foam insulation material
How to make the body. 4. The upper end of the inner and outer boxes is connected by a decorative frame, and
The decorative frame has a transparent upper opening for attaching the cylinder.
A hole is formed, and the through hole is continuous from the space between the inner and outer boxes.
The space between the inner and outer boxes is covered with a bubble sealing material.
An opening is formed in the bottom of the outer box, and
To the inclined surface descending from the injection part in communication with the inlet
Forming an injection path with an injection port that opens to the side
And injecting the undiluted solution of the foamed insulating material from the inlet.
A method of manufacturing a heat-insulating box.