JPH03148580A - Heat insulating panel - Google Patents

Abstract

PURPOSE:To improve the bonding strength of the peripheral end rims of both of inside and outside plates and simplify the assembling of both inside and outside plates and a frame body by a method wherein a multitude of fine grooves is formed on the abutting surfaces of the frame body abutting against the peripheral ends of flat surfaces of both of inside and outside plates from the side of space toward the outside of the same with a proper interval. CONSTITUTION:A multitude of fine grooves 14 is provided on the butting surfaces of a frame body 4 from the side of a space, filled with heat insulating material 5, toward the outside of the same. Cavities C are formed between the fine grooves 14 and the inside and outside plates 2, 3. The cavities C effects as air discharging sections, discharging air in the space. Additionally, one part of the heat insulating material 5 is guided into the cavities C while the guided heat insulating material 5 is functioned as a bonding member for bonding the frame body 4 to the inside plate 2 and the outside plate 3.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] Industrial Application Field The present invention relates to a heat insulating panel constituting a heat insulating wall of a storage such as a prefabricated cold storage.

BACKGROUND TECHNOLOGY A heat insulating panel is constructed by arranging a frame at the ends of both inner and outer plates arranged side by side with a gap between them, and filling the space formed by both plates and the frame with foamed heat insulating material. ■Jitsukai Showa 58-8709
5, JP-A-62-91779, etc.

The above-mentioned publication (2) discloses a device in which flanges formed at the ends of both the inner and outer plates are fitted and fixed into fixing grooves formed in the frame.

On the other hand, the above-mentioned publication (2) discloses a frame body configured to correspond to the shape of flanges formed at the ends of both the inner and outer plates.

Problems to be Solved by the Invention Both techniques (1) and (3) above involve positioning the frame body and both plates, but when filling the space with foam insulation material, the frame body is temporarily attached to both plates. An adhesive member such as adhesive or double-sided tape is placed between the two to secure them. However, the work of arranging the adhesive member is extremely troublesome, and this has been a factor in reducing the efficiency of the assembly work.

In addition, during the foaming process, it is difficult for a part of the insulation material to wrap around between the two, and the fixation between the frame and the edges of both the inner and outer plates is weak, and the edges of the inner and outer plates are susceptible to external shocks and vibrations. There was a problem that the material would peel off from the frame, increasing the gap.

Therefore, the present invention aims to improve the joint strength of the peripheral edges of both the inner and outer plates, and to provide a heat insulating panel that can be easily assembled with both the inner and outer plates and the frame.

[Structure of the invention]

Means for Solving the Problems The heat insulating panel of the present invention is arranged in an annular manner along the inner surface of the end of both the inner and outer plates, each having flanges facing each other by bending the edges of a flat surface at right angles. a frame body that maintains a gap between the inner and outer plates, and a foamed heat insulating material filled in a space formed by the frame body and the inner and outer plates, A large number of narrow grooves are formed at appropriate intervals outward from the space side on the contact surface that comes into contact with the space.

Since the contact surface of the working frame is provided with a large number of narrow grooves extending outward from the space filled with the heat insulating material, a cavity is formed between the narrow grooves and both the inner and outer plates. In addition to this cavity acting as an exhaust part for discharging the air in the space, a part of the insulation material is introduced into this cavity, and this guided insulation material is connected to the frame, inner panel, and outer panel by a liquid pipe. It acts as an adhesive member.

EXAMPLE Hereinafter, an example of the present invention will be described based on FIGS. 1 to 5.

1 is a heat insulating panel constituting the wall of a prefabricated cold storage,
The inner plate 2 and the outer plate 3 have flanges 2a and 3a facing each other formed by bending the edges of the flat surfaces 2b and 3b inward at approximately right angles, and the inner surfaces of the end portions of both plates 2.3 (for details, The peripheral inner surfaces of the flat surfaces 2b and 3b and the flanges 2a and 3
The space formed by the frame body 4 made of resin and having a convex or concave portion formed on the outer surface, both the inner and outer plates 2 and 3, and the frame body 4 is filled inside. It consists of a foamed heat insulating material 5. In addition, since the space between the inner and outer plates 2°3 is maintained at a constant distance by the frame 4, the width in the depth direction of the surface of the contacting part must be adjusted to ensure a stable condition when the frame 4 is installed. It is set larger than before, so that the center of gravity of the frame itself is inward.

The frame body 4 has a first contact surface 11 that comes into contact with the peripheral edges of the flat surfaces 2b and 3b of both the inner and outer plates 2 and 3, and a flange 2 of both the inner and outer plates 2゜3.
a, 3a, and has a second abutting surface 12 that comes into contact with the second abutting surfaces 12, and a convex portion 13 or a concave portion 21 is formed between the second abutting surfaces 12.

In addition, the first abutting surface 11 has a large number of narrow grooves 14 at appropriate intervals from the side toward the outside (more specifically, the second abutting surface 12).
is formed. In this embodiment, all of the narrow grooves 14 are communicated from the space side to the second contact surface 12, but some or all of the narrow grooves 14 are connected to the first contact surface 11. It is also possible to form only one part.

Incidentally, an injection hole 15 for injecting the warm liquid of the foamed heat insulating material is formed in the frame 4 forming one side of the rectangular ring shape.

Next, manufacturing of the heat insulation panel will be explained.

First, the inner plate 2 (or outer plate may be used) is placed on the board 3, and the second contact surface 12 is brought into contact with the inner surface of the flange 2a, the first contact surface 11 is brought into contact with the edge of the flat surface 2b, and the convex The frame body 4 is placed on the inner plate 2 while being assembled into a shaped annular shape so that the portion 13 (or the recessed portion 21) faces outward. At this time, to prevent the frame body 4 assembled in an annular shape from falling inward,
As shown in FIG. 1, adjacent frames 4 are arranged so that one end is in contact with the inner surface of one frame and the other end is flush with the second contact surface 12 of the other frame. When doing so, it is desirable to provide a temporary fixing member such as liquid pipe tape between the first contact surface 11 of the frame 4 and the flat surfaces 2b and 3b of both the inner and outer plates. Even without it, it can be maintained in a stable state.

Thereafter, the outer plate 3 is placed over the frame 4 so that the edges of the flange 3a and flat surface 3b of the outer plate 3 contact the second and first contact surfaces 12 and 11.

Then, the outer surfaces of the frame 4 and the outer panel 3 are covered with the foaming jigs 32 to 35 and the pressure plate 36, and the substrate 31 and the pressure plate 3 are covered.
Insulating material 5 is inserted from injection hole 15 so that 6 is in a horizontal state.
Inject the foaming source solution.

The injected hot liquid foams and grows so as to spread throughout the space from the initial arrival point (see point P in Figure 1). Due to this foam growth, the air in the space is absorbed into each narrow cavity C formed by each narrow groove part 14 and both the inner and outer plates 2 and 3, and the slight gap between the inner surface of the flanges 2a and 3a and the second contact surface 12. The heat insulating material 5 fills the space K with the heat insulating material 5.

As the air is discharged from the gap, a part of the foamed heat insulating material 5 wraps around inside the cavity C, and the adhesive properties of the heat insulating material cause the thin groove portion 14 to bond with both the inner and outer plates 2 and 3. Glue between. Further, since the gap is small, there is no leakage of the foamed heat insulating material from the gap.

After the foaming work is completed, the foaming jigs 32 to 35, the pressure plate 3
6 and the substrate 31, the heat insulating panel 1 is completed.

Even if the frame on one side is slightly tilted before foaming, the gap formed between the frame and the flange will be pushed outward by the foaming insulation and come into contact with the plunger. The gap is only small enough for air to leak, and leakage of the insulation material can be prevented.

〔Effect of the invention〕

As detailed above, according to the present invention, the narrow groove portion formed on the abutment surface of the frame acts to create a cavity communicating with the space between the frame and both the inner and outer plates. Not only can this cavity be used as an exhaust part for the air in the space, but also a heat insulating material can be wrapped around it and the frame body and both the inner and outer plates can be bonded together using the adhesive properties of the heat insulating material. In this case, the frame body and both the inner and outer plates can be adhesively fixed using a heat insulating material, and the end surfaces of the inner and outer plates facing the frame may peel off from the frame body due to external shocks or vibrations, thereby closing the gap. The problem of increasing the size is eliminated, and the strength can be improved.

In addition, as in this example, the width of the frame itself in the depth direction is widened,
If the frame body is held in a stable state, the work of temporarily fixing the frame body and both the inner and outer plates may be omitted.

[Brief explanation of the drawing]

Each figure shows one embodiment of the present invention, and FIG. 1 is a partially cutaway perspective view of the heat insulating panel before the foaming process, and FIG.
3 is a view corresponding to FIG. 2 after foaming, FIG. 4 is a perspective view of the main part of the frame, and FIG. 5 is a view corresponding to FIG. 2 of the frame having a recessed part. . 1- Insulation panel, 2... Inner plate, 2a, 3a...
・Flange, 2b, 3b...-Flat surface, 3...-Outer plate, 4... Frame, 5... Foam insulation material, 11.
...Abutting surface, 14...Narrow groove, C...Cavity, K
・−・Space.

Claims (1)

[Claims] 1. A frame body which is arranged in an annular shape along the inner surfaces of the end portions of both the inner and outer plates and has flanges facing each other by bending the edges of the flat surfaces at right angles, and maintains the distance between the inner and outer plates; and the frame. and a foamed heat insulating material filled in a space formed by the frame body and the inner and outer plates, and the frame body has a foamed heat insulating material filled in a space formed by the inner and outer plates, and the frame body has a foamed heat insulating material filled in a space formed by the inner and outer plates. A heat insulating panel characterized by having a large number of narrow grooves formed at appropriate intervals in the direction.