JPH08260616A - Expanded panel with hollow duct and manufacture thereof - Google Patents

Abstract

PURPOSE: To make it possible to cut down the number of components and constitute a hollow duct at low cost and execute wiring work, such as electric cords smoothly and accurately. CONSTITUTION: This panel comprises a plywood-made inner board 2 and a steel plate-made outer board 4 while side boards on both sides 6a and upper and lower walls 6b are formed with a steel plate and an expanding material 8 is filled substantially in an enclosed panel. A hollow duct 10, which is opened on either an upper board 6b or a lower board, at least at one location, is installed inside the panel. The hollow duct is formed and turned into a hollow by removing a steel pipe 14 from inside the panel after the expanding material 8 is filled up when the steel pipe 14 is inserted in the panel 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foam panel with a hollow duct and a method for manufacturing the foam panel.

[0002]

2. Description of the Related Art Conventionally, an outer wall, an inner wall of a building, a floor material,
As a partition plate or partition, a foamed panel having a foamed material (heat insulating material) filled inside the panel is widely used. Inside the main panel, a hollow duct may be provided for conducting electrical wiring or the like. FIG. 3 shows a perspective view of a conventional foam panel with a hollow duct.

The foamed panel a is formed into a substantially parallelepiped, and the inside of the substantially closed panel is filled with a foamed material b. Further, inside the panel, a pipe pipe c made of synthetic resin is provided as a hollow duct for wiring an electric cord or the like, and this pipe pipe c is inserted when the foam material b is filled and held in the panel as it is. Has been done. With such a configuration, conventionally, an electric cord or the like is inserted into the piping pipe c to process the electric wiring.

[0004]

In the conventional foamed panel a, since the hollow duct is composed of the piping pipe c, the number of parts is large and the material cost is high, so that the hollow hollow is cheaper. A duct structure is desired.

Further, when the foam material b is filled, the resin-made piping pipe b is deformed by the pressing force of the foam material b, and the piping pipe b does not extend straight inside the panel but comes off from a predetermined wiring line. However, there is a risk that the position of the outlet portion provided on the indoor side does not match the position of the piping pipe b.

Therefore, if the filled foam material is perforated by a drill or the like and the hole is used as a hollow duct, the number of parts and the material cost can be reduced. However, in that case, the surface of the processed surface of the hole (inner peripheral wall of the duct) is rough and soft, so that there is a possibility that a trouble such as the tip of the cord being caught when the electric cord or the like is inserted may occur.

[0007] These problems can occur in the panels other than the foamed panel used as a structural member of a building, for example, in the foamed panel used in a cold storage car or an automobile and requiring a hollow duct.

The present invention has been made in view of the above-mentioned conventional problems, and a hollow duct can be constructed at a low cost by reducing the number of parts, and a wiring work such as an electric cord can be smoothly and accurately performed. It is an object of the present invention to provide a foam panel with a duct and a method for manufacturing the same.

[0009]

The present invention has the following configuration to achieve the above object. That is, the invention of claim 1 includes an inner plate made of plywood and an outer plate made of steel plates, and the four side plates are made of steel plates, and
The inside of the substantially closed panel is a foam panel filled with a foam material, and inside the panel, in a foam panel with a hollow duct in which a hollow duct opened in the side plate extends, the hollow duct is A foam panel with a hollow duct, which is a cavity formed by filling the foam material in a state where a rod member is inserted inside the panel and then removing the rod member from the inside of the panel.

Further, the invention of claim 2 is provided with an inner plate made of plywood and an outer plate made of steel plates, and four side plates are made of steel plates, and a foam material is provided inside the substantially closed panel. In the method for producing a foam panel with a hollow duct in which a hollow duct opened in the side plate extends, a steel pipe having an outer surface treated with Teflon is provided inside the panel. In the inserted state, after filling the foam material, a cavity is formed by removing the steel pipe from the inside of the panel, and the cavity is made into the hollow duct. It is a manufacturing method.

[0011]

According to the inventions of claims 1 and 2, the hollow duct is filled with the foam material in a state where a rod member (steel pipe in claim 2) is inserted into the panel, and then the inside of the panel is filled. Since it is a cavity formed by removing the rod member from the above, it is not necessary to insert another component such as a resin piping pipe in order to provide the hollow duct. Therefore, the number of parts and the material cost are reduced, and the hollow duct is inexpensively constructed.

Further, the inner peripheral surface of the foam material (the inner peripheral surface of the hollow duct), which is hardened by closely contacting the outer surface of the rod member when the foam material is filled, has an inner peripheral surface of a hole formed in the foam material after filling. The surface is harder and smoother than the surface. Therefore, the tip of the cord is not caught when wiring the electric cord or the like.

Further, according to the second aspect, since the steel pipe having high rigidity is hardly deformed during foaming, the hollow duct obtained by removing the steel pipe also extends along the predetermined wiring line inside the panel. Therefore, it becomes possible to perform accurate work even when installing the outlet part or the like.

Further, according to the second aspect, by adopting a steel pipe having an outer surface treated with Teflon, it is possible to prevent the foam material from sticking to the outer surface of the steel pipe at the time of filling the foam material, so that the steel pipe is removed. You will be able to smoothly pull out the steel pipe.

[0015]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a foam panel with a hollow duct of this embodiment. FIG. 2 is a sectional view showing the structure around the steel pipe according to this embodiment.

In this embodiment, an inner plate 2 made of plywood and an outer plate 4 made of a steel plate such as a zinc steel plate are provided, and left / right plates 6a and upper / lower plates 6b (corresponding to four side plates) are provided. A foamed panel made of a steel plate and filled with a foaming material 8 inside the substantially closed panel, and a hollow duct 10 that is open in at least one of the upper and lower plates 6b is inside the panel. Foam panel with an extending hollow duct (hereinafter,
It is 12).

The hollow duct 10 is a cavity formed by removing the steel pipe 14 from the inside of the panel after filling the foam material 8 with the steel pipe (corresponding to a bar member) 14 inserted inside the panel.

The structure of each part and the method of manufacturing the foam panel 12 will be described below. The foam panel 12 is, for example, a wall material of a building, and has a vertically long, substantially rectangular shape in a front view. Each of the inner plate 2 and the outer plate 4 has a substantially rectangular shape. The left and right plates 6a are formed in a substantially U-shaped cross section with one side open, and the inner plates 2 are arranged so that their open sides face each other.
Also, they are arranged on the left and right side edges of the outer plate 4. Upper / lower plate 6b
Are arranged at the upper and lower edges of the inner plate 2 and the outer plate 4, and at least one of the upper and lower plates 6b is provided with a circular through hole 16 through which the steel pipe 14 can be inserted. In addition, in FIG. 1, the foamed panel 12 is shown in a horizontally laid state, and one of the upper and lower plates 6b is shown on the front side. The shape of the left and right plates 6a is not limited to this embodiment, and one of the left and right plates 6a has a convex cross section and the other has a concave shape, and the foam panel 12 is joined in the width direction thereof. But it's okay.

The steel pipe 14 is a circular pipe whose outer surface is Teflon-processed (see FIG. 2). Before filling the foam material of the foam panel 12, as shown in FIG. Extend in. At this time, at least one end of the steel pipe 14 is supported by the upper / lower plate 6b.

After the foam material 8 is filled, as shown in FIG. 1, the steel pipe 14 is inserted from the inside of the panel through the through hole 16.
Is pulled out and removed, whereby a substantially cylindrical hollow having an inner shape corresponding to the outer shape of the steel pipe 14 is formed, and this hollow is used as the hollow duct 10. When pulling out the steel pipe 14, for example, by using the steel pipe 14 having a length longer than the length of the hollow duct 10, the end of the steel pipe 14 protruding outside the panel from the through hole 16 is grasped and the steel pipe 14 is lengthened. Pull out in the direction. The foam material 8 is made of a heat insulating material having excellent heat insulating properties and sound insulating properties such as urethane foam.

According to the foamed panel 12 of the present embodiment having the above-described structure and the method for manufacturing the same, the hollow duct 10 is formed by removing the steel pipe 14 from the inside of the panel. No parts needed. Therefore, the number of parts is reduced and the hollow duct 10 can be constructed at low cost.

Further, the inner peripheral surface of the foam material 8 (the inner peripheral surface of the hollow duct 10), which is in close contact with the outer surface of the steel pipe 14 when the foam material 8 is filled, is more than the hole machined with a drill after filling the foam material. , A harder and smoother surface. Therefore, a smooth wiring work can be performed without catching the tip of the cord when wiring an electric cord or the like.

Further, since the steel pipe 14 having high rigidity hardly deforms when the foam material is filled, the cavity (hollow duct 10) formed by removing the steel pipe 14 also extends straight along a predetermined wiring line inside the panel. Come to do. Therefore, with respect to the installation of the outlet portion or the like on the inner plate 2 side, accurate work can be performed without shifting the position.

Further, since the foam material 8 is prevented from sticking to the outer surface of the steel pipe 14 by using the steel pipe 14 having the outer surface treated with Teflon, the steel pipe 14 can be smoothly pulled out. , Workability is also good.

The present embodiment is a preferred embodiment of the present invention, and the technical scope of the present invention is not limited to this embodiment. For example, the foamed panel of the present invention (claim 1)
The hollow duct according to (1) may be formed by inserting a rod material (solid or hollow) made of a material other than a steel pipe before the foam material is filled and then withdrawn after the foam material is filled.

[0026]

As described above, according to the present invention, the number of parts can be reduced and the hollow duct can be constructed at low cost. Also, the wiring work of the electric cord or the like can be performed smoothly and accurately.

[Brief description of drawings]

FIG. 1 is a perspective view of a foam panel with a hollow duct of the present embodiment.

FIG. 2 is a cross-sectional view showing a structure around a steel pipe according to this embodiment.

FIG. 3 is a perspective view of a conventional foam panel with a hollow duct.

[Explanation of symbols]

 2 Inner plate 4 Outer plate 6a Left / right plate (corresponding to side plate) 6b Upper / lower plate (corresponding to side plate) 8 Foam material 10 Hollow duct 12 Foam panel 14 Steel pipe (corresponding to bar member)

Claims (2)

[Claims] 1. An inner plate made of plywood and an outer plate made of steel plates, and four side plates made of steel plates, and
A foam panel filled with a foam material inside the substantially closed panel, wherein the inside of the panel is a foam panel with a hollow duct in which a hollow duct opened at the side plate extends, wherein the hollow duct is A foam panel with a hollow duct, which is a cavity formed by filling the foam material in a state where a rod member is inserted inside the panel and then removing the rod member from the inside of the panel. 2. An inner plate made of plywood and an outer plate made of steel plates, and four side plates made of steel plates, and
A method for producing a foamed panel with a hollow duct, wherein the inside of the substantially closed panel is a foamed panel filled with a foaming material, and a hollow duct that opens at the side plate extends inside the panel. In the state where the Teflon processed steel pipe is inserted into the inside of the panel, after filling the foam material, a cavity is formed by removing the steel pipe from the inside of the panel so that the cavity becomes the hollow duct. A method for producing a foam panel with a hollow duct, which is characterized in that