JPH0617528Y2 - Insulation panel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention relates to, for example, a large prefabricated refrigerator and a heat insulating panel constituting a floor or ceiling of a clean room.

2. Description of the Related Art Conventionally, for example, a heat insulating panel that constitutes a floor or a ceiling of a refrigerator has two aluminum surface plates arranged at a predetermined interval from each other and a polyvinyl chloride resin arranged on the peripheral portions of both surface plates. In combination with a frame made of synthetic resin such as
It has been manufactured by filling a raw material of a foamable synthetic resin for a heat insulating material made of hard polyurethane by injection foaming into a hollow portion formed by both surface plates and a frame. With regard to such an insulation panel, the applicant first made a corner
A piece is arranged, and the frame is connected to four linear frame members arranged between respective side portions of both surface plates and end portions of two frame members adjacent to each other at right angles. Seen from the plane, L
It has been proposed to construct it by four corner pieces of a shape (for example, see Japanese Patent Laid-Open No. 61-172986).

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, when both the frame member and the corner piece have a substantially U-shaped cross section, the corner piece is formed by injection molding of a synthetic resin such as polyvinyl chloride resin. Therefore, the gap between the top and bottom walls of the corner piece is narrowed at these tips due to the cooling shrinkage of the resin after molding, and this cannot be improved by the injection foaming of the heat insulating material. There is a problem in that the thickness of a part becomes thinner than the thickness of the other part, and the heat insulation performance deteriorates.

The object of the present invention is to solve the above-mentioned problems of the prior art, and even when both the frame member and the corner piece have a substantially U-shaped cross section, the distance between the upper wall and the lower wall of the corner piece is small. There is a need to provide a heat insulating panel that does not become narrow, and therefore the thickness of the corner portion is the same as the thickness of other portions, and the heat insulating performance is very excellent.

Means for Solving the Problems In order to achieve the above-mentioned object, the present invention is arranged between two rectangular face plates arranged at a predetermined interval from each other and between the side parts of both face plates. Formed of four corner pieces that are substantially L-shaped when viewed from a plane that connects the end portions of two frame materials that are adjacent to each other at right angles to each other, and both surface plates and the frame In a heat insulating panel constituted by a heat insulating material filled in a hollow portion surrounded by, the linear frame material and the corner piece are both substantially U-shaped in cross section, and the corner piece is
The gist of the invention is a heat insulating panel provided with a reinforcing wall extending from an outer corner portion to an inner corner portion and connecting an upper wall and a lower wall.

Embodiment Next, an embodiment of the present invention will be described with reference to the drawings.

The drawing shows the case where the heat insulating panel according to the present invention is applied to a floor panel of a prefabricated refrigerator / refrigerator.

Insulation panels that make up floor panels for prefabricated freezers and refrigerators
(1) is arranged between two aluminum rectangular face plates (2) (2), which are arranged at a predetermined distance from each other, and each side part of both face plates (2) (2). A total of four linear polyvinyl chloride resin frame members (4) and (5) and two frame members (4) and (5) that are adjacent to each other at a right angle. Four L-shaped polyvinyl chloride resin corner pieces
A frame (3) composed of (6) and a heat insulating material (7) made of a foamed rigid polyurethane resin filled in the hollow part surrounded by both surface plates (2) and (2) and the frame (3). ing.

The frame members (4) and (5) are substantially U-shaped with the cross-section openings facing inward, and the upper wall (8) is concave in cross-section, the lower wall (9) facing it, and both walls. (8) It is composed of a vertical wall (10) connecting the outer edges of the (9), and the opening side edges of the upper wall (8) and the lower wall (9) respectively have a face plate (2). Bend edge (2a) of (2) (2
Surface plate locking parts (11) (11) to which a) is locked are provided, respectively.

On the other hand, the corner piece (6) has a substantially U-shaped cross section, which is the same as the linear frame members (4) and (5).
At both ends of (6), thin-walled insertion parts (12) and (12) are respectively provided in a direction extending two sides of the L-shaped corner member (6), and these insertion parts (12) (12) ) Is the end of the frame material (4) (5)
It is designed to be plugged into (4a) (5a).

The corner piece (6) has a reinforcing wall (15) that passes from the outer corner (6a) to the inner corner (6b) of the corner piece (6) and connects the upper wall (13) and the lower wall (14). It is provided. Therefore, during injection molding of the corner piece (6), the gap between the upper wall (13) and the lower wall (14) of the corner piece (6) will be reduced even if the resin cools and shrinks after molding. Therefore, the thickness of the corner portion of the panel (1) becomes the same as the thickness of other portions, and the panel (1) has a very excellent heat insulating property.

Further, in the center of the width of the reinforcing wall (15), there is a tubular portion for air venting that has a long flat elliptical cross-sectional contour and is opened in the vertical direction.
(16) is provided, and the air-releasing tubular portion (16)
A communication hole (17) is provided on the lower side, and an air vent passage (18) is formed from the communication hole (17) through the lower end opening of the tubular portion (16) to the upper end opening. Further corner pieces
Injecting foamable polyurethane resin raw material for heat insulating material into the upper wall (13) near the corner of (6) The air inside the corner piece (6) during foaming can be discharged and the outflow of resin raw material is minimized. The two air vent holes (20) (20) to be obtained are drilled. Due to the manufacturing of the air vent small holes (20), the air vent small holes (20) are tapered from the outside toward the inside.

The heat insulation panel (1) that constitutes the floor panel of the prefabricated freezer / refrigerator is the concave upper wall (8) (13) of the frame (3) of this.
Are connected to each other by fitting a convex frame of a side wall panel (not shown).

When manufacturing the heat insulation panel (1), in the hollow portion formed by both surface plates (2) (2) and the frame (3), when the foamable rigid polyurethane resin raw material for heat insulating material is injected and foamed. The air existing in the hollow portion exits from the air vent passage (18), but it is necessary to prevent the polyurethane resin raw material from leaking out of the passage (18) together with the air. That is, if the polyurethane resin raw material leaks from the air vent passage (20), it may adhere to the surface plates (2) and (2) and cause discoloration.Therefore, the air vent passage (18), in other words, the cylinder. The size of the shaped part (16) is determined as appropriate. For example, when the width of the air vent passage (18) is 7 mm, the thickness of the passage (18) is 0.5 to 2.0 mm, preferably 0.8 to 1.6 m.
m, and length is 5 to 50 mm, preferably 10 to 30 mm
And Also, the upper wall near the corner of the corner piece (6) (1
The diameter of the air venting small hole (20) formed in 3) for discharging the air therein is 0.1 to 1.5 mm, preferably 0.8 to 1.5 mm. By opening such air vent holes (20) (20), the corner piece
(6) The heat insulating material (7) can be surely filled up to all the inside corners. Here, when the diameter of the air vent small hole (20) is, for example, 1.5 mm, the foamable polyurethane resin raw material slightly comes out from the hole (20) in the form of a thin rod, but it does not droop downward. Solidify. Therefore, in this case, after the foaming of the heat insulating material (7), the protruding heat insulating material can be easily removed by folding it. Further, if the air vent small hole (20) has a pore diameter of 1.0 mm, the foamable resin raw material hardly comes out of the hole (20), or even if it comes out very little, it has a pea-sized size. Further, if the small diameter of the air vent hole (20) is 0.8 mm or less, the foamable resin raw material hardly exits from the hole (20). If the air vent small hole (20) has a large diameter of 2.0 mm, there is a large amount of leakage of the foaming polyurethane resin raw material from the air venting small hole (20), and the leaking foaming resin raw material is directed downward. It is not preferable because the surface plates (2) and (2) may become dirty or discolor due to the sagging. In addition, a small hole (2
If the pore diameter of 0) is less than 0.1 mm, it is not preferable because air is difficult to be discharged and the pores (20) are likely to be clogged with the foaming resin raw material.

In this embodiment, in the combined state in which the insertion parts (12) (12) of the corner pieces (6) are inserted into the end portions (4a) (5a) of the frame members (4) (5), the frame members ( 4) Vertical grooves (21) (21) having a predetermined width are formed between the ends (4a) (5a) of (5) and the corner piece body (6A). These grooves (21) (2
1) absorbs the dimensional error between the frame members (4) and (5) and the corner pieces (6). That is, the frame members (4) and (5) are made by extrusion molding of synthetic resin such as polyvinyl chloride resin, while the corner pieces (6) are made by injection molding of synthetic resin such as polyvinyl chloride resin. Since they are manufactured, a dimensional error such as thickness is likely to occur between them. So, the frame material
(4) Between the end portions (4a) (5a) of (5) and the corner piece body (6A), vertical grooves (21) (21) having a predetermined width are formed so that the two Even if there is a dimensional error such as thickness and a step difference in the connection part, this does not stand out, it is possible to eliminate the unsightly and absorb the dimensional error between the two Is.

The L-shaped corner member (6) shown in the figure has both sides substantially equal in length, but the present invention is not limited to this, and one of both sides is longer than the other. It may be.

Further, in the above embodiment, the case where the heat insulation panel according to the present invention is applied to the floor panel of the prefabricated refrigeration / refrigerator has been described.
The same applies to the heat insulation panels constituting the ceiling panel of the refrigerator, the floor panel of the clean room, and the ceiling panel.

Effect of the Invention As described above, the present invention has two rectangular surface plates arranged at a predetermined distance from each other and four linear frames arranged between the respective side portions of both surface plates. Frame and a frame consisting of four corner pieces that are approximately L-shaped when viewed from the plane that connects the ends of two frame members that are adjacent to each other at a right angle, and a hollow part surrounded by both surface plates and the frame In the heat insulation panel configured by the heat insulation material, the straight frame material and the corner piece are both substantially U-shaped in cross section, and the corner piece is formed from the outer corner portion to the inner corner portion of the corner piece. Since the reinforcing wall that is passed over and connects the upper wall and the lower wall is provided, even if both the frame member and the corner piece have a substantially U-shaped cross section, Make sure that the space between the wall and the bottom wall is narrow. Therefore, the thickness of the corner portion becomes the same as the thickness of the other portions, and the heat insulating performance is very excellent.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is an enlarged perspective view of a partial cutout main portion of a floor panel, and FIG. 2 is FIG. 1 II-II.
FIG. 3 is an enlarged sectional view taken along the line III-III in FIG. 2, and FIG. 4 is an enlarged perspective view of an essential part in a state where a frame member and a corner piece are combined. (1) …… Insulation panel (floor panel), (2) …… Square surface plate,
(3) …… Frame, (4) (5) …… Frame material, (6) …… Corner piece, (6a) …… Outer corner, (6b) …… Inner corner, (7) …… Insulation, (13) …… Upper wall, (14) …… Lower wall, (15) …… Reinforcement wall.

Continuation of the front page (51) Int.Cl. ⁵ Identification number Reference number within the agency FI technical display area // B29C 39/10 2126-4F B29K 105: 04 B29L 31:10 4F

Claims (1)

[Scope of utility model registration request] 1. Two square face plates (1) (2) arranged at a predetermined distance from each other and a straight line arranged between each side part of both face plates (1) (2). Four frame members (4) (5) and four corner pieces (L-shaped) as seen from the plane connecting the ends of the two frame members (4) (5) adjacent to each other at a right angle to each other ( In the heat insulation panel constituted by the frame (3) consisting of 6) and the heat insulating material (7) filled in the hollow part surrounded by both the surface plates (1) (2) and the frame (3), the straight line The frame members (4) and (5) and the corner piece (6) are both substantially U-shaped in cross section, and the corner piece (6) includes the outer corner portion (6a) to the inner corner portion (6a). A heat insulation panel provided with a reinforcing wall (15) which is passed to 6b) and which connects the upper wall (13) and the lower wall (14).