JPH0544591B2 - - Google Patents

Description

[Detailed Description of the Invention] [Objective of the Invention] Industrial Field of Application The present invention provides a method of filling a foam heat insulating material between inner and outer plates arranged at a predetermined interval, and disposing a frame material around the periphery of the foam heat insulating material. Regarding insulation panels.

Conventional technology To construct a prefabricated refrigerator or freezer, a plurality of insulation panels are usually combined to form a box having a top wall, side walls, and bottom wall. As disclosed in Japanese Patent No. 62-91779, for example, a concave portion and a convex portion are formed at the end of a heat insulating panel the size of one tatami mat,
The convex portion of one panel is fitted into the concave portion of the other panel, and the panels are coupled together by a coupling device called a rotary lock provided in the convex portion and the concave portion. A resin frame material has been used to form the convex portions and concave portions.

Problems to be Solved by the Invention In the above-mentioned conventional technology, the contact portion between the inner and outer plates and the frame material is the inner or outer surface of the flange portion bent at the end of both plates, and the frame member It was something that came into contact with both surfaces. However, since the flange part is formed by bending a plate material about the size of a tatami mat, the angle of the bend is not a right angle and may curve outward or inward.
There is a dimensional difference in the fitting part with the frame material,
Gaps were likely to form between the frame material and the flange. On the other hand, when filling the foam insulation material between the inner and outer plates, the insulation material is initially in a liquid state and is injected vigorously between the two plates, so if there is a gap like the one mentioned above, it will ooze outward from the gap. This results in foaming. For this reason, there was a problem in that manufacturing steps such as removal of urethane scum and surface finishing in the gap and the vicinity thereof were increased, and quality such as heat insulation performance was deteriorated.

Therefore, the present invention provides a heat insulating panel having a structure that makes it difficult to form a gap between the frame member and the flange portion.

[Structure of the invention]

Means for Solving the Problems The heat insulating panel of the present invention has an inner plate and an outer plate, each having a rectangular shape in plan view and having four sides bent to form a flange portion, and a third plate that locks the flange portion of the inner plate. A frame member having a first groove and a second groove for locking a flange of an outer plate, a convex or a concave formed between the first and second grooves, and an engagement device inside the convex or concave. and,
and a foam heat insulating material filled between the two plates with both the inner and outer plates locked to the frame material, the frame material forming a storage part on one side of the first and second groove parts, and the frame material forming a storage part on one side of the first and second groove parts. A fin piece is provided which is made of a flexible soft material and which is inclined in a direction opposite to the filling direction of the heat insulating material and comes into contact with the flange part.

Function The fin pieces 17 formed in the first groove part 13 and the second groove part 14 of the frame material 5 from a flexible soft material, respectively, are bent due to bending errors etc. when forming the flange part. 10 and 12 into grooves 13 and 1
4 and 4 are in point or line contact instead of surface contact, and a gap is created between the two parts.It functions to close the gap between the two parts, and also functions to suppress the bleeding of the foam insulation material filled in the panel. Prevents insulation from leaking to the outside. Further, gaps are formed between the flange parts 10 and 12 and the groove parts 13 and 14, and even when this gap is small, the foaming solution flowing through the gap accumulates in the space between the fin piece 17 and the storage part 18. , this foaming stock solution foams and warps the fin pieces 17 toward the flange portion to increase the contact area, reliably closes the gap and suppresses bleeding of the foamable heat insulating material,
Reliably suppresses leakage of insulation material to the outside of the panel.
Further, the flange portions 10 and 12 are connected to the groove portions 13 and 1.
4, when the fin piece 17 makes surface contact with the storage part 1
8, and the flange parts 10, 12 and the groove part 13
and 14 to ensure surface contact, thereby avoiding bleeding of the heat insulating material and leakage of the heat insulating material to the outside of the panel.

Embodiments Embodiments of the present invention will be described below with reference to FIGS. 1 to 5.

1 is a prefabricated low-temperature refrigerator configured into a box-like body by connecting a plurality of heat insulating panels 2 in series, and each panel has a different shape or configuration depending on the position where it is installed, such as the ceiling, side walls, floor, etc. However, it usually has a regular square shape.

The heat insulating panel 2 includes an inner plate 3 and an outer plate 4 arranged symmetrically with a predetermined interval, a frame member 5 arranged at the peripheral edge of the inner plate 3 and the outer plate 4, and an inner plate. 3. It is composed of a foamable heat insulating material 6, such as foamed polyurethane, which is filled into the space formed by the outer panel 4 and the frame material 5.

The inner plate 3 and the outer plate 4 are metal plates having a rectangular shape in plan view, and the four sides thereof are bent to form flange portions 10 and 12 having, for example, an L-shaped cross section.

On the other hand, the frame material 5 serves as a connection part for connecting panels to each other, and this frame material is divided into those having convex portions and those having concave portions, and the convex portions are combined with the concave portions to integrate them. A coupling device 11 called a rotary lock (which forms a pair with a hook body 11A having a hook and a pin body 11B having a pin) is disposed inside the convex portion and the concave portion. , this coupling device 11 rotates the hook of the hook body 11A to connect the pin body 11B.
By hooking it onto the pin, both panels are firmly locked together, allowing the panels to be firmly connected and fixed together with a simple operation.

The frame material 5 is formed by extrusion molding of a resin such as foamed vinyl chloride, and the frame material 5 is formed by extrusion molding of a resin such as foamed vinyl chloride.
a first groove portion 13 that abuts and locks the outer surface of 0;
, a second groove portion 14 that abuts and locks the outer surface of the flange portion 12 of the outer plate 4, and is located between the first groove portion 13 and the second groove portion 14 to form a convex portion 15 or a concave portion 16. are doing. Incidentally, holes 15A and 16A for operating the coupling device 11 are formed in the convex portion 15 and the concave portion 16. Then, due to some factors such as imbalance in the pressing force by the foaming jig or warping of the flange due to errors due to bending,
Flange portions 10 and 12 and first and second groove portions 1
Even if a gap is formed between the flange part and the groove part due to point or line contact instead of surface contact with 3 and 14, in order to prevent the foaming stock solution from seeping out from this gap, the first Groove 13 and second groove 1
4, one side of which the flange parts 10 and 12 come into contact is made of a flexible soft material, such as soft foamed vinyl chloride, in a direction that prevents the foaming solution from seeping out, that is, the convex or concave portions of the frame material are directed upward. The fin pieces 17 are formed uniformly so as to be inclined downwardly and always come into contact with the flange portion. The figure shows an example in which the base portion of the fin piece 17 is arranged in a storage part 18 having a recess formed on one side, so that the fin piece 17 can be stored in the storage part 18. . In this case, even if there is a slight gap between the flange portions 10 and 12 and the first and second groove portions 13 and 14, the foaming stock solution can be used between the fin piece 17 that contacts the flange portion and the storage portion 18. This accumulates and foams, causing the fin piece 17 to warp toward the flange and increase the contact area with the flange, which improves sealing performance and prevents the heat insulating material from seeping outside. can.

With the above configuration, filling of the foaming stock solution will be explained.
are respectively locked in the first grooves 13 of the four frame members 5,
The four flanges 12 of the outer panel 4 are respectively locked in the second grooves 14 of the frame member 5, and both the inner and outer panels 3, 4 and the four frame members 5 are held down with a foaming jig, and the injection port (see Fig. Inject the foaming stock solution (not shown). At this time,
Even if there is a gap between the flange portion 10 and the first groove portion 13 or between the flange portion 12 and the second groove portion 14 due to some reason, the foaming solution that tends to ooze outward along the wall surfaces of the groove portions 13 and 14 will be prevented. , fin piece 1
7 suppresses the bleeding. Further, due to the flexibility of the fin piece 17, the filling pressure of the foaming stock solution between the fin piece 17 and the storage part 18, and the foaming pressure, the fin piece 17 warps toward the flange part 1.
0, 12 and the grooves 13, 14 (see the dotted line in Figure 5) can be expected to have a sealing effect, suppressing and preventing leakage of the insulation material to the outside, and removing urethane scum after foaming. Additionally, post-processing such as surface finishing is not required. Furthermore, the flange portion 1
If no bending errors occur when forming the fins 10 and 12 and the flanges 10 and 12 are in surface contact with the grooves 13 and 14, the fin piece 17 is stored in the storage part 18 and the flange part 10 , 12 are in contact with each other, the surfaces of the grooves 13 and 14 are flat, the flange portion and the groove portion are in surface contact, and the space between the flange portions 10, 12 and the groove portions 13 and 14 is reliably eliminated, resulting in heat insulation. Smearing of the material and leakage of the insulation material to the outside of the panel can be avoided.

〔Effect of the invention〕

As described in detail above, according to the present invention, a storage portion is formed on one surface of the first and second groove portions for locking the flange, and the storage portion is formed of a flexible soft material. By arranging the fin piece that is inclined in the direction opposite to the filling direction of the insulation material and contacts the flange part, a slight gap is created between the flange part and the groove part, and the foaming solution enters into this gap. However, the fin pieces prevent leakage to the outside, and the fin pieces warp toward the flange due to the flexibility of the fin pieces and the foaming pressure of the raw solution between the fin pieces and the housing, causing the flange and groove to It can be expected to have the effect of closing the gaps between the foams, and can reliably prevent the foam insulation material from leaking to the outside. In addition, if no bending errors occur when forming the flange and the flange makes surface contact with the groove, the fin piece will be stored in the storage part and the surface of the groove in contact with the flange will be flat. This ensures surface contact between the flange portion and the groove portion, eliminates the gap between the flange portion and the groove portion, and reliably prevents the heat insulating material from bleeding and leaking to the outside of the panel.

[Brief explanation of the drawing]

Each figure shows an embodiment of the present invention, and FIG. 1 is an external perspective view of a heat insulating panel, FIG. 2 is an external perspective view of a prefabricated low-temperature refrigerator, and FIG. 3 is partially omitted from FIG. 1 A-A A sectional view, Figure 4 is a sectional view of the frame material, and Figure 5 is B in Figure 3.
FIG. 3 is an enlarged cross-sectional view showing a state in which a heat insulating material is filled. 2...Insulation panel, 3...Inner plate, 4...Outer plate,
5... Frame material, 6... Foaming insulation material, 10, 12...
...Flange portion, 13...First groove portion, 14...Second groove portion, 17...Fin piece, 18...Storage portion.

Claims (1)

[Claims] 1 An inner plate and an outer plate that have a rectangular shape in plan view and have flange portions formed by bending the four sides, and a first groove portion that locks the flange portion of the inner plate and locks the flange portion of the outer plate. This first groove has a second groove portion.
and a frame material having a convex portion or a concave portion between the second groove portions and having an engagement device inside the convex portion, and a foaming material filled between the inner and outer plates with both the inner and outer plates being locked to the frame material. and a heat insulating material, and the frame material has a storage part formed on one side of the first and second groove parts, and the storage part is made of a flexible soft material so that the frame material is arranged in a direction in which the heat insulating material is filled. A heat insulating panel characterized by having fin pieces inclined in opposite directions and abutting on a flange part.