JPH0346753B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a foam wall used as a heat insulating wall for low-temperature showcases and the like.

(b) Prior art The show case shown in Utility Model Publication No. 58-26606 (A47F3/04) has a spacer made of heat insulating material and synthetic resin interposed between the inner box and the outer box, and the spacer is made of a heat insulating material and a synthetic resin. A bolt with a rotation prevention mechanism is integrally embedded, the tip of the bottle protrudes to the side of the inner box and outer box, and an insulating wall is used to tighten the nut on the protruding part of the bolt. has been done.

(C) Problems to be Solved by the Invention In the prior art described above, since the spacer is spaced apart from the flanges that form the edges of both the inner and outer boxes, the strength of the flanges is not only weak, but also Because they are spaced apart from each other, there is a lot of moisture intrusion into the insulation material through the gap, which causes the problem of rapid deterioration of the insulation material.Furthermore, when assembling both the inner and outer boxes, bolts are not inserted into the holes formed in both boxes. Furthermore, during foaming, the insulation material that entered between the inner and outer boxes and the spacer leaked from the holes onto the surfaces of both the inner and outer boxes, and after foaming, the insulation material leaked. A problem also arose in that so-called post-processing work was required to remove the particles.

(d) Means for Solving the Problems In order to solve the above problems, the present invention provides at least two parallel end edges with opposing flanges 19A,
Both the inner and outer plates 19 and 20 forming the inner and outer plates 20A, the inner and outer contact portions 24 and 26 that are interposed between the inner and outer plates, are located inward of the flanges and contact the back surfaces of the inner and outer plates, respectively; an overhanging portion 27 located between both flanges and in contact with both flanges; a pair of overhanging pieces 29 and 30 respectively in contact with the surfaces of both flanges;
A heat-insulating aggregate 2 defined by the inner and outer abutting parts, an overhanging part, and a pair of storage grooves 28A and 28B for receiving the flanges, respectively.
1, and a foamed heat insulating material 22 which is filled with foam into the gap formed between the inner and outer plates using the aggregate.

(E) Effect When assembling the foam wall 15, the aggregate 21 is attached to both the inner and outer plates 19,
20, and the projecting portion 27 acts as a spacer between both flanges 19A and 20.
Moreover, both flanges 19A and 20A have storage grooves 28.
A, 28B and abuts on the overhanging pieces 29, 30, so when the inner and outer plates 19, 20 are overlapped, not only will no misalignment occur between them, but
It also prevents the aggregate 21 from shifting, and both the inner and outer plates 19,
20 assembly operations are greatly facilitated. In addition, during foaming, the degree of fixation of the jig is a little loose, and the inner plate 19 and the inner abutting part 24 or the outer plate 20 and the outer abutting part 26
Even if the foamed heat insulating material 22 leaks outward a little due to the negative relationship between the foamed insulation material 22 and the foamed insulation material 22, it collects in both storage grooves 28A and 28B and solidifies, so that foaming leakage to the foamed wall surface can be avoided.

(f) Examples Examples of the present invention will be described below based on the drawings. In the figure, 1 is a low-temperature case whose main body is made up of a heat insulating wall 2 with an opening 3 for loading and unloading products in the front, and heat insulating side plates 4, 4, which can be attached and removed freely, are provided on both left and right sides of the heat insulating wall. A circulation path 8 in which a partition plate 5 is disposed at an appropriate distance from the inner wall of the heat insulating wall, and a cooler 6 and a blower fan 7 are installed.
A storage chamber 10 having a plurality of shelves 9, and both outlet and suction ports 11 and 12 facing each other along the upper and lower edges of the opening are formed, and the cold air exchanged by the cooler is transferred to the seventh A cold air curtain (CA) is formed in the opening 3 and the storage chamber 10 is cooled by forced circulation using the blower fan 7 as shown by the arrow in the figure. The partition plate consists of a top wall part 5A, a back wall part 5B, a removable bottom wall part 5C, and a front wall part 5D, and there are struts along at least both left and right edges of the back wall part 5B that become part of the partition plate. 13 are installed side by side. These columns support the shelf 9, and the number of columns is increased as the width of the low-temperature show case 1 becomes longer.

The heat insulating wall 2 consists of a plurality of foamed walls 14, 15, and 16 at the top, center, and bottom.
As shown in the figure, at the adjacent edges of each foam wall,
The foam walls 14, 15, 16 are connected to each other by forming one of the paired grooves 17 and 18, and by butting the grooves 17 and 18 against each other. Become. Each of the foamed walls has both inner and outer metal plates 19, 20 as shown in FIGS. 1 to 4.
, a hard insulating aggregate 21 that is interposed between the left and right sides between the inner plates and serves as a spacer and a reinforcing material, and a hard polyurethane etc. that is foamed and filled into the void formed by both the inner and outer plates and the aggregate. It consists of a foamed heat insulating material 22. Both the inner and outer plates have bent sides 19a, 20 whose peripheral edges are bent downward at a substantially right angle to the gap direction.
a, and inwardly facing sides 19b, 20b which are formed by further bending this bent portion at a substantially right angle toward the inside of the gap, respectively, forming opposing flanges 19A, 20A. The aggregate is a known long material made by extrusion molding a material in which a large number of pieces of wood flour 23 are mixed into a resin such as vinyl chloride.
As shown in the figures to FIG.
4, and a foam insulation material 22 that is in contact with the back surface of the outer panel 20
is interposed between an outer abutting portion 26 that defines a filling groove 25 filled with the flange and is located inwardly than the flange, and the inward sides 19b and 20b of both the inner and outer plates, and these two inward sides touch. A projecting portion 27 and storage grooves 28A, 2 extending from the edge of the projecting portion in both left and right or up and down directions to receive both flanges 19A, 20A.
8B, and the overhanging pieces 29 and 30 whose back surfaces are in contact with the surfaces of the pressed curved sides 19a and 20a of both flanges
and a protruding strip 31 that protrudes from the outer surface of the overhang and serves to position the frame, which will be described later.

Reference numeral 32 shown in FIG. 2 is a metal frame that connects the heat insulating wall 2 and the partition plate 5 and closes both left and right sides of the circulation path 8. As shown in FIGS. 3 and 4, one end edge is made of wood screws. Even with a stopper 33 such as the like, the aggregate 21 is
The other end edge is fixed to the partition plate 5 with a fastener 34 such as a screw or screw. To be more specific, the upper part of one end edge of the frame 32 forms a branch piece 32A that receives the load of the foam wall 14 at the top, and is screwed together through the inner contact part 24 and the overhang part 27, respectively. It is fixed to the heat insulating wall 2 with two fasteners 33,
The center and lower part of one end edge are fixed to the heat insulating wall 2 with fasteners 33 that pass through the overhanging part 27 and are screwed together, while the upper part of the other end edge and the front part of the top wall part 5A of the partition plate 5 The wall portion 5A is fixed to the edge of the front wall portion 5D with a stopper 34, and the center portion of the other edge is attached to a support 13 arranged in parallel with the end of the back wall portion 5B of the partition plate 5.
By attaching this frame 32, the connection strength of each foam wall 14, 15, 16 is improved, and the mechanical strength of the insulation wall 2 is improved, and the mechanical strength of the partition plate 5 is also improved. At the same time, the load applied to the shelves 9 on which products are placed is transferred from the frame 32 to the floor on which the low-temperature case 1 is installed, through the legs 35 that support the insulation wall 2, with or without the insulation wall 2. Therefore, deformation of the support column 13 due to the load of the shelf 9 can be avoided.

Next, a method of manufacturing the foamed wall will be explained using the foamed wall 15 in the center as an example.

First, attach the flange 19A to a flat substrate (not shown).
After installing the inner plate with the inner plate facing upward, the aggregate 21 is placed on the inner plate, and the flange 19A is fitted into the storage groove 28A on one side of the aggregate, and then the outer plate 2
Insert the flange 20A of No. 0 into the storage groove 28B of the other side and overlap the outer plate 20 on the aggregate 21. Both the inner and outer plates 19,2
Assemble 0. Then, both the inner and outer plates 19 and 20 are fixed with a jig (not shown), and a foaming solution is injected into the gap between the inner and outer plates, and the foam is solidified to form the foamed heat insulating material 2.
2, the desired foamed wall 15 can be obtained.

Therefore, when the foam wall 15 is assembled, the aggregate 21 acts as a spacer between the inner and outer plates 19, 20, and the projecting portion 27 acts as a spacer between the flanges 19A, 20A. , 20A are fitted into the storage grooves 28A, 28B, and the overhang pieces 29, 3
0, so when the inner and outer plates 19, 20 are overlapped, not only will no misalignment occur between them, but also the aggregate 21 will be prevented from misaligning, making it easier to assemble the inner and outer plates 19, 20. becomes much easier.
Also, during foaming, the degree of fixation of the jig was a little loose, and a small amount of the foamed heat insulating material 22 leaked outward from between the inner plate 19 and the inner abutting part 24 or between the outer plate 20 and the outer abutting part 26. Since the foam collects in both storage grooves 28A and 28B and hardens, leakage of foam to the surface of the foam wall 15 can be avoided. Furthermore, after foaming, the stopper 33 can be fixed from two directions from the inner plate 19 through the inner abutment part 24 and through the overhang part 27, so the mounting direction of the frame 32 can be expanded, and this mounting direction can be changed from one direction to the other. It is possible to select either of the two directions, and the work of attaching to the foam wall 15 can be easily performed.

In addition, by using resin containing wood flour 23 as the aggregate 21, it not only does not warp due to drying like wood or rot due to moisture absorption, but also does not suffer from temperature changes like resin. It has various advantages such as no expansion or contraction, no cracking due to attachment of the fastener, excellent moisture resistance, and the ability to fasten the fastener without a pilot hole.

(G) Effects of the Invention The present invention described above produces the effects listed below.

When assembling the inner and outer plates, the aggregate itself acts as a spacer between the inner and outer plates, and the protruding portion of the aggregate acts as a spacer between the flanges of the two plates, and the flanges are retracted. Since they are fitted into the grooves and come into contact with the overhanging pieces, it is possible to prevent not only the inner and outer plates but also the aggregate from shifting, making it easier to assemble both the inner and outer plates.

During foaming, even if a little foam insulation material leaks outward from between the inner plate and the inner abutment part or between the outer plate and the outer abutment part, this leaked foam material collects in the storage groove and solidifies. Therefore, leakage of foam to the surface of the foam wall can be avoided, and there is no need to perform a so-called post-processing operation to remove leaked foam insulation material.

Because resin containing wood powder is used as aggregate, it not only does not warp due to drying like wood aggregates or rot due to moisture absorption, but also unlike resins, it does not warp due to temperature changes. swelling,
It does not shrink or crack due to fastening, and has excellent temperature and moisture resistance.
Various advantages can be obtained, such as the ability to fasten the fastener without a pilot hole.

[Brief explanation of drawings]

The drawings all show embodiments of the foamed wall of the present invention; Fig. 1 is an overall perspective view, Fig. 2 is a right side view of a low-temperature case made of the foamed wall, and Fig. 3 is Fig. 2A- A sectional view, FIG. 4 is a sectional view taken along the line B-B in FIG. 2, FIG. 5 is a perspective view of the aggregate, FIG. It is. 19...Inner plate, 20...Outer plate, 19A, 20A
... flange, 21 ... aggregate, 22 ... foam insulation material, 24 ... inner contact part, 26 ... outer contact part,
27... Projection, 28A, 28B... Storage groove, 2
9,30... overhang piece.

Claims (1)

[Claims] 1. Both the inner and outer plates with opposing flanges formed on at least two parallel edges, and the inner and outer plates that are interposed between the inner and outer plates, are located inward from the flanges, and are in contact with the back surfaces of the inner and outer plates, respectively. an abutment part, an overhang part located between the two flanges and in contact with the two flanges, a pair of overhang pieces that respectively contact the surfaces of the flanges, both the inner and outer abutment parts, an overhang part, and both overhang pieces. and a long and narrow insulating aggregate made of resin containing wood powder, which is defined by a pair of long and narrow storage grooves that respectively receive the flanges, and is formed between this aggregate and both the inner and outer plates. A foam wall is made of a foam insulation material that is filled into the voids.