JP3332273B2 - Grating for cold storage room - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grating which is installed in a room requiring temperature control, such as a refrigerator room or a warm room, forms a floor and supplies cold or hot air to the room.

[0002]

2. Description of the Related Art Conventionally, as gratings for large refrigeration rooms such as refrigerated warehouses and refrigerated holds, joists (wooden) are provided at predetermined intervals on the upper surface of a flat base floor, and floor boards (wooden) are placed on the joists. ) And bolted to each other. In this grating, a space separated by a joist between the base floor and the floor plate serves as a ventilation passage, and the temperature-controlled air sent there is blown into the room through a large number of ventilation holes formed in the floor plate.

[0003]

However, in this wooden grating, since the joists and the floor plate are fixed on the base floor surface by a large number of bolts, the mounting and dismounting of the grating (for example, when the temperature is not adjusted during cleaning, the temperature is not controlled). The change to the warehouse) was very troublesome. And
It was necessary to finish the base floor flat in order to prevent temperature-controlled air from leaking, and it was troublesome to finish the base floor when laying grating in warehouses and holds that originally had steps or irregularities on the floor.

Recently, a grating made of an aluminum alloy, in which a floor plate and a joist are integrally formed, has been developed. In this case, too, the base floor is finished to be flat to eliminate a gap between the grating and prevent air leakage of temperature-controlled air. I needed to.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and a plastic duct board integrally molded by blow molding and a plastic duct board integrally molded by blow molding and mounted on the duct board. consists of plastic floorboard to be location, the duct board has a ventilation hole formed in the air passage and the upper wall position formed between the upper and lower walls, said floorboard corresponds to vent air hole It is a grating for a cold storage room, which has a ventilation hole penetrating vertically in a position.

More specifically, the duct board is characterized by having upper and lower walls and left and right side walls, internal ribs connecting the upper and lower walls to define a ventilation passage, and a ventilation hole formed at an appropriate position on the upper wall. Moreover, the floorboard has upper and lower walls and the surrounding side wall, the ribs connecting the upper and lower walls, and a vent hole which penetrates vertically at the position corresponding to the ventilating holes of the duct board, the
Ventilation holes continue from the symmetrical position of the upper and lower walls to the opposite wall
The concave ribs are parallel to each other and fit between the upper and lower walls.
It is characterized in that it is formed on the bottoms crimped together .

[0007]

According to the present invention, the temperature-regulated air flowing through the ventilation passage in the duct board is blown upward through the ventilation hole of the floor board through the ventilation hole, and serves to maintain the refrigerator compartment at the set temperature. Since the duct board itself has a built-in air passage, even if the surface of the base floor is not flat, the temperature-controlled air does not leak. Furthermore, since the duct board itself has a built-in air passage, it can be laid directly on a floor having a frame structure (for example, a floor with exposed joists).

The reason why the floor board is assembled on the duct board is that the load of the load or the forklift is directly supported by the strong floor board so that the load is dispersed and applied to the duct board. is there. In other words, since the duct board has a built-in air passage, the height of the board is large and the load bearing capacity is relatively inferior, but by doing so, the overall grating can be formed without increasing the thickness of the duct board too much Load resistance can be improved. In the case where the grating is formed only by the duct board, it is necessary to increase the thickness of the board to increase the load-bearing capacity, which results in wasted material.

In order to assemble the floor board on the duct board, it is preferable to use, for example, bolts and the like. However, when laying this on the floor of a cold storage room, bolts and the like are not particularly required. It's easy. Also,
Since the duct board and floor board of the present invention are blow-molded articles of plastic, they are lightweight, and their strength can be freely selected by appropriately setting the thickness and the number of ribs connecting the upper and lower walls. Furthermore, when this is blow-molded with a flexible material, even if there are slight steps or irregularities on the floor, it can be absorbed by deformation.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction and operation of the grating according to the present invention will be specifically described below with reference to FIGS. First,
FIG. 1 shows a duct board unit formed by blow molding (see also FIG. 3). The duct board 1 has upper and lower walls 2 and 3 and left and right side walls 4, and two types of reinforcing ribs 5 and 6 for connecting the upper and lower walls 2 and 3 are formed. The rib 5 is a linear rib connecting the upper and lower walls 2 and 3, and the rib 6 is an annular or partially annular portion having a concave shape continuously facing the opposite wall from the symmetric position of the upper or lower wall 2 or 3, It has bottoms 7 parallel to each other, and each bottom is press-fitted and integrated with each other at the center between the upper and lower walls. In addition,
Methods for forming such ribs on blow molded articles are described, for example, in U.S. Pat. No. 4,951,986 and U.S. Pat. No. 4,142,757.

The ribs 5 and 6 serve to partition the inside of the duct board 1 and to define a front-rear direction ventilation passage 8 between the upper and lower walls 2 and 3 together with the left and right side walls 4. Further, a ventilation hole 9 is appropriately formed in the upper wall 2, and has a role of sending temperature-controlled air from the ventilation passage 8 to a ventilation hole described later.

FIG. 2 shows a floorboard unit formed by blow molding (see also FIG. 3). The floor board 11 has upper and lower walls 12 and 13 and a peripheral side wall 14. Between the upper and lower walls 12 and 13, three types of reinforcing ribs 15 to 17 connecting the upper and lower walls 12 and 13 are formed. The rib 15 is a linear rib similar to the rib 5 of the duct board,
The rib 16 has a substantially different shape in plan view from the rib 6 of the duct board, but is essentially the same annular or partially annular rib. The rib 17 is also essentially the same as the rib 6 of the duct board, except that the recessed portion 17a from the lower wall 13 toward the upper wall 12 is annular or partially annular,
The difference is that the recessed portion 17b from the upper wall 12 to the lower wall 13 is not annular or partially annular, but is a parallel groove. Further, a ventilation hole 18 is appropriately formed at the center of the bottom of the rib 17 (17a , 17b) , and is located at a position corresponding to the ventilation hole 9 of the duct board 1. Since the diameter of the rib 17 at the lower wall 13 of the recessed portion 17a is set to be larger than the diameter of the ventilation hole 9, the positioning of the ventilation hole 9 and the ventilation hole 18 is easy.

The above-mentioned duct board 1 and floor board 11
When using as a grating, as shown in FIG. 3, the duct board 1 is assembled on a floor board 11 with bolts and the like, and is laid in a warm / cool storage room. The temperature-controlled air sent through each air passage 8 is supplied to the ventilation holes 9.
The air is blown up into the cold storage room through the vent hole 18 and serves to keep the hot and cold storage room at the set temperature. The vent 18
Is located slightly below the surface of the upper wall 12, a gap is created even if a load is loaded right above the ventilation hole 18, and does not hinder the inflow of temperature-regulated air.

[0014]

According to the present invention, since the ventilation passage is formed inside the duct board, even if the base floor of the refrigerating compartment is not finished flat, there is no leakage of the temperature-regulated air, and the frame does not leak. It can be installed directly on the structural floor. Also, the duct board and floor board are both plastic blow molded products, so they are lightweight,
Since there is no need to fix it to the base floor with bolts or the like, it can be easily attached and detached. Furthermore, since the grating of the present invention has a two-layer structure of the base board and the floor board, the load applied to the base board is dispersed, and the grating with high load resistance can be obtained with a small amount of material.

[Brief description of the drawings]

FIG. 1 is a plan view of a duct board (a), a side view (b),
It is a rear view (c).

FIG. 2 is a plan view (a) and a side view (b) of a floor board.
It is.

FIG. 3 is a cross-sectional view when a duct board and a floor board are assembled (A-A cross section in FIG. 1 and B-B in FIG. 2, respectively).
(Corresponding to section B).

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Duct board 5, 6 Rib of duct board 8 Ventilation passage 9 Ventilation hole 11 Floor board 15, 16, 17 Rib of floor board 18 Ventilation hole

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F25D 17/08 301 F25D 23/00 306

Claims (3)

(57) [Claims] 1. A plastic duct board integrally molded by blow molding, and a plastic floor board integrally molded by blow molding and placed on the duct board, wherein the duct board is provided between upper and lower walls. have formed air passage and vent holes formed in the top wall position on the floor board, cold storehouse chamber and having a vent hole which penetrates vertically at the position corresponding to the ventilation holes For grating. 2. The duct board has upper and lower walls and left and right side walls,
The grating for a cold storage room according to claim 1, further comprising an internal rib connecting the upper and lower walls to define a ventilation passage, and a ventilation hole formed at an appropriate position on the upper wall. 3. The floor board has upper and lower walls and surrounding side walls, ribs connecting the upper and lower walls, and ventilation holes vertically penetrating at positions corresponding to the ventilation holes of the duct board .
The pores are continuously directed from the symmetrical position of the upper and lower walls to the opposite wall
Indented ribs parallel to each other and in place between upper and lower walls
3. The grating for a cold storage room according to claim 1, wherein the gratings are formed on bottoms pressed together .