JPH0226712A - Heat insulating body - Google Patents

Abstract

PURPOSE:To make it easier to judge the quality of foaming of heat insulating material by placing a transparent material at a part of an internal material or a sheathing material which becomes last foaming region of the heat insulating material in a heat insulating body wherein a foamed heat insulating material is filled between the internal material and the sheathing material. CONSTITUTION:A box 1 is assembled by connecting a metal inner box 2 and a metal outer box 3 with a connecting member 4 consisting of a transparent member such as a transparent resin at an opening part each other. A foamable raw liq. W fed in the box 1 through a feeding hole 9 hits the facing vertical panel 3B and falls down. It gradually foams and grows from the fallen-down point toward the opposite end sides between base panels 2A and 3A, between facing vertical panels and between the base panel and a vertical panel crossing the facing vertical panel and flows into between one vertical panel and between remaining vertical panels. Finally, it reaches the most distant part 8B from the fallen-down point and the heat insulating material is filled in the whole region in the space 8. In this instance, as the connecting member 4 is constituted of a transparent material, foamed state in the part, especially in the final foaming region 8B can be seen at a glance and it is easily performed to find out the quality of foaming and the region of bad foaming.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] Industrial Field of Use The present invention relates to a heat insulating body in which it is possible to visually check whether the filling state of the foamed heat insulating material is good or bad.

Conventional Technology As a means of thermally partitioning a storage room in a freezer or refrigerator, it is possible to form a box shape by combining heat insulating plates, or to form a box-like structure with an opening on the - side and the remaining five sides integrally forming both the inner and outer sides. It is known to fill the space between the boxes with a foamed heat insulating material, and an example of the latter is Japanese Patent Publication No. 35462/1983. In this publication, the growth rate of the foaming agent in one opposing area is the same as that in the other opposing area, in order to suppress the occurrence of areas where the foam insulation material is not filled. The thickness of one area is different from the thickness of the other area.

Problems to be Solved by the Invention In the above-mentioned Japanese Patent Publication No. 61-35462, the growth rate of the heat insulating material is changed between one area and the other area by making the thickness of one area different from the thickness of the other area. The idea is to keep it the same. As a result, the growth rate of the insulation material rising in both areas is maintained at the same level, but the exhaust holes formed in the connecting members are not necessarily all closed by the insulation material in the same state, and due to the slow growth rate, some exhaust holes There were cases where an unfilled area was formed in the surrounding area, or there was an unfilled area even when all the exhaust holes were closed. In this case, it was not easy to discover the unfilled area.

Therefore, in the present invention, the portion of the connecting member that connects the interior member and the exterior member becomes the final foaming area, and an exhaust hole is formed in the connecting member, so that the portion where the insulation material is not filled is formed. The present invention provides a heat insulating body that limits the area and allows the area to be seen through a transparent body.

[Structure of the invention]

Means for Solving the Problems The present invention provides a heat insulating body formed by filling a foamed heat insulating material between an interior member and an exterior member, and the final foamed area of the heat insulating material in the interior member or the exterior member is A transparent body is placed in the opposite part. Further, a connecting member is disposed in connection with the interior member and the exterior member, and an injection port is provided in which the final foamed area of the heat insulating material is a part of the connecting member, and the connecting member has at least a portion made of a transparent material. It is effective in setting the final foaming area if a suitable number of exhaust holes are formed and a predetermined amount of foaming stock solution is injected from the injection port and foamed to form a heat insulator.

The foaming status of the heat insulating material can be confirmed at a glance from the outside through a transparent body disposed in a portion corresponding to the final foaming area of the functional heat insulating material, making it easier to judge whether the foaming is good or bad. Further, by forming the exhaust hole in the connecting member, the foaming growth of the heat insulating material near the connecting member can be promoted, and the final foaming area can be easily set.

Further, by setting the final foaming area in the area where the connecting member is disposed, it becomes easier to judge whether the foaming of the heat insulating material is good or bad based on the foaming state confirmed through the transparent part of the connecting member.

EXAMPLES Hereinafter, examples of the present invention will be described with reference to FIGS. 1 to 11.

(1> is a box body, which includes an inner box (2) as an interior member made of metal with a negative frontage, an outer box (3) as an exterior member, and both boxes (
2) It is assembled by a connecting member (4) which connects (3) to each other at an opening and is made of a transparent material such as transparent resin, and a decorative frame (5) which covers and conceals this connecting member (4). The inner box (2) consists of a board (2A) facing the - side and a quadruple board (2B) rising from the periphery of the board, and a flange (2B) that contacts the - side of the connecting member (4) at the upper end of each standing board. 6). In addition, the outer box (3) is similar to the inner box, as well as the board (3).
A) and a quadruple plate (3B) rising from the periphery of the substrate, and a flange (7) that contacts the other side of the connecting member (4) is formed at the upper end of each standing plate.

(8) is the space formed by assembling the connecting member (4) and both the inner and outer boxes (2) and (3), and (9) is the space between the outer box and the standing board (
3B) an inlet formed on one end side and making the final foamed area of the insulation material part of the connecting member (4);
(4) has a large number of exhaust holes formed, (11) has an exhaust hole (10
> To prevent the insulation from leaking from the exhaust hole (10
) is an air-permeable member such as maltbrene disposed inside.

In this example, the entire connecting member (4) is made of a transparent material, but due to the positional relationship of the injection port (9), at least the portion corresponding to the final foaming area may be made of a transparent material.
If it is not possible to set the connecting member (4) as the final foaming area using only the position of the injection port (9>), a weir member (not shown) to change the foaming flow is appropriately placed in the middle of the foaming flow. do it.

As shown in FIGS. 1 and 3, the box body 1) is installed on the substrate (14) of the outer jig (13) with the opening facing upward, and the inner jig (16) that has descended allows the inner box ( 2> and the connecting member (4), and each standing plate (3B) is held down and fixed by each individual plate (15) of the outer jig that has been erected.After this, the injection gun (17) is A foaming stock solution (such as a hard polyurethane stock solution) is passed through the injection path (18) and the injection port (9).
W) on the vertical plate (3) facing the vertical plate forming the injection port (9).
Inject a predetermined amount toward B). (19) is the exhaust hole (10
) is an exhaust path formed in the inner jig (16).

The completely injected foaming stock solution (W) hits the opposing vertical plate (3B) and falls, and from the falling point it flows between the substrates (2A) and (3A), between the opposing vertical plates, and between the vertical plates that intersect the substrate and the opposing vertical plate. The foam gradually grows toward the other end, flows into the gap between the vertical plates and between the remaining vertical plates, reaches the farthest part from the falling point (this is called the final foaming area (8B)), and forms a space. (8> The inner metal area is filled with a heat insulating material. Here, the foaming stock solution (W) changes from cream-like to foam-like and gradually foams and grows. At this time, the air in the space (8) and the foam Gas exhaust holes (10) (10) formed in the connecting member and inner jig (16)
) through the exhaust passage (19) to eliminate any remaining air that would impede foam growth.

After foaming is completed, both the inner and outer jigs (13, 16) and the nest are removed to complete the heat insulating box (1).

However, since the connecting member (4) is made of a transparent material, the foaming status of this area, especially the final foaming area (8B), can be seen at a glance, making it easy to discover whether foaming is good or bad, as well as defective sections. This makes it easier to deal with.

Further, since this connecting member (4>) can be covered and hidden by the decorative frame (5), there is no problem in terms of appearance.

On the other hand, to explain an internally hollow insulated pipe using the blower pipe (20) as an example, the blower pipe (20) has an outgoing tube (21) as an interior member that serves as a conveyance path for cold air, and an interior interior member that serves as a conveyance path for return cold air. Return path # (22) as a member and both cylinders (21) (
A heat insulating material (23) such as a foamed heat insulating material that thermally covers the
) and a blower cover (24) as an exterior member covering the heat insulating material (23), and the container (21) (22)
are formed into a cylindrical shape from a material such as hard vinyl chloride, and are provided with positioning protrusions (27) at opposing positions on the outer surface of each end excluding an appropriate length. The ventilation cover (24) has a heat insulating material (2
3) to form a space (H) for filling the container (21
) (22), the cross section can be formed into a suitable shape, for example, a rectangular shape, and a storage part (25) is provided in the longitudinal direction of the corner. In addition, notches (28A>(28B)) are formed at both ends for positioning the end face material, which will be described later.(29) is located inside the other end (24B) of the ventilation cover <24>, An end seal body that prevents foam leakage from the container (2
1) An opening (30A>(30B>) is formed into which the (22) is inserted, and a slit (31) corresponding to the protruding piece (27) is provided in each opening (30A>(30B). 32) is an end plate that can be positioned on the outer surface of the end seal body (29), and has a protrusion (33) corresponding to the notch (28B).
) and an insertion port (3) into which the containers (21) and (22) are inserted.
4) (35) is formed. (36) is the ventilation cover (
24) It is a transparent plate as a connecting member that can be positioned inside one end side (24A) and acts as an end plate and a foaming state confirmation plate, and is made of a transparent material such as transparent vinyl chloride.
1) It has a protrusion (39) corresponding to the insertion opening (37) (38) through which the (22) is pushed through and the notch (28A) at one end of the blower cover (24), and further includes an injection gun (42). A foaming hole (40) is formed to function as a facing injection port and also to function as a gas vent during foam filling.

Next, the manufacturing method of the blower pipe (4) will be explained. First, the transparent plate 36) is made of a blower cover (24) with one end side (24A) as the upper surface and a breathable material (41) such as maltbrene arranged around the blower cover (24). from above, and both cylinders (21) (22)
from the other end into the ventilation cover (24) and insert it into the insertion hole (3).
7) Insert each into (38). Then, the openings (30A) (30B) of the end face seal body 29) and the insertion openings (34) (35) of the end face plate are aligned and adhered, so that the end face seal body (29) is on the inside. Both cylinders (2
1) (22) While inserting the other end side, insert the ventilation cover (24)
It is housed inside to form a hollow tube. Place the hollow tube assembled in this way on the bottom jig (50A) with one end (24A) facing up, and cover the side jig (50B) with the top jig (50C). Fix the hollow tube.

Then, the injection gun (
42) facing into the space ()l), and the foaming stock solution from the foaming machine (not shown) is applied to the end face sealing body (29) on the other end side.
After injecting a predetermined amount (see solid line arrow in Figure 8), remove the injection gun (42) and use a transparent air vent tube (45) with a breathable material (44) such as maltbrene wrapped around the lower end. is inserted into the hole (40>).On the other hand, the foaming stock solution injected toward the end face sealing body (29) changes from the point where it reaches the stock solution to creamy to foamy state, gradually foaming and growing until it fills the space ( H) (see Figure 8 - dotted chain line arrow).At this time, the air and foaming gas in the space are also gradually pushed up and discharged to the outside from the air vent pipe (45>). It gradually progresses and the air vent tube (
45) The heat insulating material enters and rises inside the chamber, but after confirming that this rise has stopped, foaming is finished, and then remove the top, side, and bottom jigs (5QC) (50B>(50A>) and the air vent pipe (45).
4) Remove.

At this time, the internal condition, that is, the foaming condition of the heat insulating material (23) can be confirmed from the transparent plate (36), so if there is any air remaining, just make a hole in that area and fill it with the foaming solution ( If air remains, it is near the transparent plate, which is filled in the final stage). This rear end face plate (32
) and transparent plate (36) with a heat insulating material (46) such as maltbrene.
) to attach the specified parts (fixing members, distribution lines, etc.).

〔Effect of the invention〕

As described in detail above, according to the present invention, since there is a transparent body in the area where the heat insulating material finally foams and grows, the foaming status in areas where air residue is likely to occur can be seen at a glance. Therefore, it is extremely easy to find unfilled areas after foaming is completed, and the appropriate amount of insulation material can be re-injected at the appropriate location.
The heat insulation performance as a heat insulator can be improved. On the other hand, since at least a part of the connecting member is made of a transparent material, it is now possible to check the state between the interior and exterior members from this transparent part, and the space between the interior and exterior members can be filled. You can know the foaming status of foam insulation materials. In addition, since an appropriate number of exhaust holes are formed in this connecting member, the final foaming area can be easily set in the area where the connecting member can be placed, and the final foaming area can be easily set in the area where the connecting member can be placed, and the foaming path can be changed by adjusting the position of the injection port. It becomes possible to more accurately check the foaming status of a region, that is, whether foaming is good or bad and the position of remaining air, and it becomes easier to take countermeasures when defects such as re-foaming occur.

[Brief explanation of the drawing]

Each figure shows an embodiment of the present invention. Figure 1 is a sectional view taken along line A-A with the door removed in Figure 2, Figure 2 is a heat-insulating box body with a double door, and Figure 3 is a cross-sectional view of the case with the door removed. is a diagram corresponding to Figure 1 when fixed to the foaming jig, Figure 4 is an enlarged perspective view of part B in Figure 2 with the door removed, and Figure 5 is Figure 4 C- with the decorative frame removed. 〇 Cross-sectional view, Figure 6 is a CC cross-sectional view in Figure 4, Figure 7 is a perspective view of the connecting member and decorative frame, Figure 8 is a longitudinal cross-sectional view showing the filling of the heat insulating material into the heat insulating pipe, FIG. 9 is an external perspective view of the heat insulating tube when foaming is completed, FIG. 10 is a sectional view taken along line DD in FIG. 9, and FIG. 11 is an exploded perspective view of the heat insulating tube. (1), (20)...insulator, <2), (
21), (22)...interior parts, (3),
(24)...Exterior member, (W), (23)...
Foaming stock solution, (4>, (36)...connecting member,
(9) , <40)... Inlet, (10>...
Exhaust hole.

Claims (1)

[Claims] 1. In a heat insulator formed by filling a foamed heat insulating material between an interior member and an exterior member, a transparent material is provided in a portion of the interior member or the exterior member that will be the final foaming area of the heat insulating material. A heat insulating body characterized by the following: 2. In a heat insulating body in which a foamed heat insulating material is filled between an interior member and an exterior member, a connecting member is provided to connect the interior member and the exterior member, and the final foamed area of the heat insulating material is connected to the connecting member. The connecting member has at least a part made of a transparent material and has an appropriate number of exhaust holes, and a predetermined amount of the foaming stock solution is injected through the injection port to cause foaming. A heat insulator featuring: