JPS6059505B2 - Joint structure of insulation panels - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bonding structure of a heat insulating panel, and relates to a bonding structure of a heat insulating panel, in which one end of a metal outer skin 3 of a heat insulating panel 2 whose core material 1 is made of hard foamed synthetic resin is placed outwardly from the core material 1. A protruding piece 4 is made to protrude, and a non-combustible heat insulating material 5 is buried in a portion of the core material 1 at the other end of the heat insulating panel 2 so as to be located on the back surface of the other end of the outer skin 3.
The projecting piece 4 at one end of the outer skin 3 of the heat insulating panel 2 is overlapped with the other end of the outer skin 3 of the adjacent heat insulating panel 2, and the ends of both outer skins 3 are welded together. This relates to the joint structure of insulation panels.

For insulation panels whose core material is flammable or flame-retardant rigid foamed synthetic resin such as rigid urethane foam or isocyanurate foam, the metal outer skins cannot be joined by welding. I couldn't do it.

In other words, when welding the metal outer skin during joining, welding heat would be transmitted to the hard foamed synthetic resin core material, causing problems such as deterioration of the hard foamed synthetic resin and ignition, making it impossible to join by welding. It is. For this reason, in the past, when joining insulation panels, for example, a concave part was provided at one end and a convex part at the other end, and the joint was done by concave-convex fitting, but the airtightness of the joint part However, there were problems with poor watertightness and weak bonding strength of the insulation panels. The present invention was invented in view of the above points, and its purpose is to make one end of the metal outer skin protrude outward from the core material to form a protruding piece, and the other end of the metal outer skin to be used as a protruding piece. By embedding non-combustible insulation material in the core material at the end so that it is located on the back side of the other end of the outer skin, the non-combustible insulation material is located on the back side of the welding part, and the welding heat is transferred to the hard foam. It does not spread to the synthetic resin core material, causing deterioration or ignition of the hard foamed synthetic resin core material, and because it is joined by welding, the insulation panel has good airtightness, watertightness, and strong bonding strength. The purpose is to provide a joint structure.

The present invention will be explained in detail below with reference to Examples.

FIG. 1 shows an embodiment of the heat insulating panel 2 according to the present invention. In the figure, 1 is made of a rigid foamed synthetic resin (or a filler mixed therein) such as rigid polyurethane foam or isocyanurate foam. This core material 1 is a core material.
A metal outer skin 3 is provided on both outer surfaces of the . insulation panel 2
One end is a recess 6 over the entire length, and the other end is a convex portion 7 over the entire length. One end of the metal outer skin 3 on the front side projects outward from the one end of the core material 1 to form a protruding piece 4, and this protruding piece 4 extends one side of the recess 6. It is forming.

Further, the other end of the metal outer skin 3 on the front side is substantially flush with the other end of the core material 1, and the other end of the outer skin 3 is attached to the other end of the core material 1. A non-combustible heat insulating material 5 is buried over the entire length in the longitudinal direction so as to be located on the back side of the housing. Examples of the noncombustible heat insulating material 5 include asbestos sheets, ceramic fiber sheets, rock wool boards, and calcium silicate boards. The heat insulating panel 2 is made by foaming a hard foamed synthetic resin between the outer skin 3. The side on which the noncombustible heat insulating material 5 is buried forms the convex portion 7. Therefore, in order to join the heat insulating panels 2, the protrusion 7 on the other end of the adjacent heat insulating panel 2 is fitted into the recess 6 on the one end of the heat insulating panel 2, and one end of the outer skin 3 on the front side is inserted. protruding piece 4
is overlapped with the other end of the outer skin 3 on the adjacent surface side, and this overlapping portion is welded and joined over the entire length in the longitudinal direction. In the figure, 8 indicates a welded portion. Further, numeral 9 in the figure is a backing that is interposed. The heat insulating panels 2 are joined together as described above, and the heat insulating panels 2 are used, for example, as panels for freezers, refrigerators, freezers, and cold containers. FIGS. 3 and 4 show an example in which the heat insulating panel 2 shown in FIG. 1 is used as a panel for a freezer or cold storage container. In this embodiment, the assembly is such that the convex portion 7 and the concave portion 6 are positioned in the left-right direction. The heat insulating panels 2 are joined by welding by fitting the convex portion 7 and the recess 6, and the heat insulating panel 2 on the side of the metal corner pillar 10 is fixed to the corner pillar 10 by welding the end of the outer skin 3. It has been done. Further, at both upper and lower ends of the heat insulating panel 2, the outer skin 3 on the front side is extended beyond the core material 1, and the extended pieces 11 are welded and fixed to a metal base 12 and a metal beam 13. . In the figure, reference numeral 14 denotes a corner plate, and rivets 15 are used to attach each insulating spring.
16 in the figure is urethane foam that is foamed in place. Further, 17 is a heat insulating material. In the figure, 18 is a rib attached to the outer skin 3 on the back side of the heat insulating panel 2 by projection welding or riveting.
When stored items are stored in the container, the stored items do not come into direct contact with the heat insulating panel 2, and a space for cold air circulation is created between the heat insulating panel 2 and the stored items. Fifth
The figure shows a heat insulating panel 2 for use in another embodiment of the invention. In this embodiment, the outer skin 3 on the front side is the same as the embodiment shown in FIG. 1, but the outer skin 3 on the back side is provided with a fitting protrusion 19 that protrudes rearward on one side. ,
An inset protrusion 20 bent rearward into a U shape on the other end
is provided. In this example, the ends of the outer skins 3 on the front side of the noncombustible heat insulating material 5 are welded to each other on the front side, and the fitting protrusion 19 and the fitting protrusion 20 are fitted on the back side. The two are welded together using sinome welding. Figure 7 shows an example of a freezer/cold container configured using the heat insulating panel 2 shown in Figure 5.
It is shown in FIG. Further, FIG. 9 shows still another embodiment of the present invention, in which the outer skin 3 on the back side is similar to the outer skin 3 on the front side, and the outer skin 3 on the back side is also similar to the outer skin 3 on the front side. It can be welded in the same way as the side outer skin 3. The outer skin 3 on the front side is made of cold-rolled steel plate with a thickness of 1.2wQ, and the outer skin 3 on the back side is made of stainless steel with a thickness of 0.6", but it is not necessarily limited to the above. Of course not.
In the present invention, as described above, one end of the metal outer skin of the heat insulating panel whose core material is made of hard foamed synthetic resin is made to protrude outward from the core material to form a protruding piece, and other parts of the heat insulating panel are A non-combustible insulation material is embedded in the core material of the side end so that it is located on the back side of the other end of the outer skin, and the protruding piece at one end of the outer skin of the insulation panel is inserted into the core material of the adjacent insulation panel. Overlap the side edges,
Since the ends of both outer skins are welded together, even though the core material is made of hard foamed synthetic resin, the heat during welding is not transmitted to the hard foamed synthetic resin, which changes the quality of the hard foamed synthetic resin core material and reduces its strength. There is no risk of ignition, and there is no risk of ignition.

Moreover, since the insulation panels, which have a core made of hard foamed synthetic resin and a metal outer shell, are joined by welding, the joint strength is stronger than that of conventional concave-convex fittings, and has the advantage of improved watertightness and airtightness. .

[Brief explanation of the drawing]

Fig. 1 is a sectional view of one embodiment of the heat insulating panel used in the present invention, Fig. 2 is a sectional view showing the bonded state of the above, and Fig. 3 is a longitudinal cross section of a refrigerated or refrigerated container formed using the above insulated panel. 4 is a cross-sectional view of the same as above, FIG. 5 is a sectional view of another embodiment of the heat insulating panel used in the present invention, FIG. 6 is a sectional view showing the joined state of the above, and FIG. 7 is the same as above. FIG. 8 is a cross-sectional view of the same as above, and FIG. 9 is a cross-sectional view of another example of the heat-insulating panel used in the present invention. 2 is a core material, 2 is a heat insulating panel, 3 is an outer skin, 4 is a protruding piece, and 5 is a noncombustible heat insulating material.

Claims (1)

[Claims] 1 One end of the metal outer skin of a heat insulating panel whose core material is a hard foamed synthetic resin is made to protrude outward from the core material to form a protruding piece, and the outer skin is attached to the core material at the other end of the heat insulating panel. A non-combustible insulation material is buried so that it is located behind the other end, and the protruding piece at one end of the outer skin of the insulation panel is overlapped with the other end of the outer skin of the adjacent insulation panel. A joint structure of insulation panels characterized by welding the ends together.