JPH07208800A - Air conditioning duct - Google Patents

Abstract

PURPOSE:To solely use an air conditioning duct without using a reinforcing material by incorporating rigidity in the duct formed in a cylindrical shape from an assembly of glass fiber. CONSTITUTION:A duct main material 2 made by forming glass fiber assembly or rock fiber assembly in a press-bonded state is finished in a rectangular- sectional shape to be formed in a cylinder 3. Nonwoven fabric 4 is adhered to an inner surface of the cylinder 3, and a metal foil 5 with fiber is adhered to an outer surface of the cylinder 3. The glass fiber or the rock fiber of the material 2 is enclosed with the fabric 4 and the foil 5. The glass fiber assembly or the rock fiber assembly is formed in the press-bonded state thereby to incorporate rigidity in the cylinder 4, and the cylinder 3 is not necessarily reinforced by a reinforcing material.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioning duct used for piping of air conditioning equipment and a method for manufacturing the same, and more particularly,
It can be easily manufactured and piped.

[0002]

2. Description of the Related Art Conventionally, an air conditioning duct in which a glass fiber aggregate or a lock fiber aggregate having an excellent heat insulating property is formed in a tubular shape has been used for piping of an air conditioning facility. However, since such an air-conditioning duct does not have rigidity, it is difficult to use the air-conditioning duct as it is while being directly supported by a ceiling member or a paddle member of a building or a fixed member such as other pipes when the pipe is installed. After being installed, it has been troublesome to support the fixing member.

[0003]

SUMMARY OF THE INVENTION In view of the above-mentioned prior art, the problem to be solved by the present invention is to provide an air conditioning duct which can be supported by a fixed member of a building or used alone without surrounding a reinforcing member. To provide. Another object of the present invention is to provide a method for manufacturing an air-conditioning duct that can simply perform the work of forming the tubular shape.

[0004]

According to a first aspect of the present invention, there is provided a tubular body having a quadrangular cross section, the tubular body being composed of a duct main material in which a glass fiber aggregate or a lock fiber aggregate is in a crimped state, The air conditioning duct is composed of a non-woven fabric bonded to the inner surface of the body and a metal foil with fibers bonded to the outer surface of the tubular body.

According to a second aspect of the present invention, a plate-shaped duct main material composed of a glass fiber aggregate or a lock fiber aggregate in a crimped state in which a nonwoven fabric is bonded to one surface in advance and a metal foil with fibers is bonded to the other surface in advance. In the form of a band, the pair of cutting blades having a span corresponding to the surplus when bent into the rectangular shape are pressed against the duct main material to remove the metal foil, and the duct main material And then removing the surplus, the duct main material from which the surplus has been removed is bent into a quadrangular cross section, and both ends are covered with the metal foil and integrally joined to form a quadrangular cross section. Manufactures air conditioning ducts.

[0006]

In the invention described in the first aspect of the present invention, the duct main material, which is the base material of the air conditioning duct, has the glass fiber aggregate or the lock fiber aggregate in a crimped state, and has a structure in which the fibers are simply aggregated. A rigidity that cannot be obtained is obtained. The tubular body in which the rigid duct main material is formed in a quadrangular cross section does not easily deform.

The non-woven fabric and the metal foil with fibers wrap the duct main material to prevent the fibers from peeling off. Further, the metal foil with fibers fulfills the function of maintaining the deformation of the cylindrical body, and makes the thermal insulation between the inside air and the outside air of the cylinder good. According to the second aspect of the present invention, the duct main material manufactured in the tubular body is unwound in the form of a strip, and the cutting step and the bending step are continuously performed in a flow operation, so that the section can be easily finished into a rectangular shape.

[0008]

The air conditioning duct according to the present invention will be described in detail below. FIG. 1 shows an embodiment of the air conditioning duct. The air-conditioning duct 1 is one element that becomes a plurality of air-conditioning pipes connected to each other, and is formed in a quadrangular cross section from the duct main material 2 on four sides in which the glass fiber aggregate or the lock fiber aggregate is in a crimped state. A tubular body 3, a non-woven fabric 4 joined to one surface of the duct main material 2 to form an inner surface material of the tubular body 3, and a non-woven fabric 4 joined to the other surface of the duct main material 2 to form an outer surface material of the tubular body 3. It is composed of a metal foil 5 with fibers. The four sides of the duct main material 2 are formed of the same metal foil 5a with fibers, and one corner portion is continuously provided.

The duct main member 2 divided into four sides has a predetermined thickness, and the side end portions of adjacent one sides are quadrangular by abutting the end faces and the side faces. However, the side end portion 2a of one of the duct main members 2 forming a corner that is continuously provided with the metal foil with fiber 5a has an L-shaped end surface having a protruding portion 2b. As will be described later, this is a portion to be gripped when the duct main material 2 is bent. In the glass fiber aggregate or the lock fiber aggregate, for example, each fiber is adhered by an adhesive agent such as a phenol resin, and is hard in a pressure-bonded state.

The fibers of the metal foil 5 with fibers are obtained by spinning a fibrous material into a thread shape, and the duct main material 2 is formed into a cross stitch shape.
Is adhered to the metal foil and is interposed between the duct main material 2. The inner surface of the non-woven fabric 4 is coated with black paint. According to this, when used in the kitchen of a general household, there is an advantage that dirt is not noticeable. In the air-conditioning duct 1 having the above-described configuration, the duct main material 2 that is the base thereof has the glass fiber aggregate or the lock fiber aggregate in a crimped state, and the rigidity that cannot be obtained by a structure in which the fibers are simply aggregated. Is obtained. Then, the tubular body 3 in which the duct main material 2 having such rigidity is formed in a quadrangular cross section does not easily deform.

According to the experiment, when glass fiber is used and the thickness of the duct main member 2 is bent in a square shape with a cross section of 12 mmt to 15 mmt and a pressure is applied from one side, a pressure resistance of 100 Kg / mm ³ or more is obtained. Was measured. Therefore, when a large number of air-conditioning ducts 1 according to the present invention are combined and used for air-conditioning piping, they can be supported as they are on a fixed member of a building or can be used alone. It can also be used in the kitchen of a general household.

The non-woven fabric 4 and the metal foil 5 with fibers are
Wrap the duct main material 2 to prevent the fibers from peeling off. Further, the metal foil 5 with fibers fulfills the function of maintaining the shape of the cylindrical body 3 and improves the thermal insulation between the inside air and the outside air of the cylindrical body 3. The air-conditioning duct 1 in FIG. 1 has a structure suitable for a straight portion of the air-conditioning pipe, but it can be easily formed into a T shape or a curved shape.

Next, an embodiment of a method of manufacturing the air conditioning duct 1 will be described with reference to FIG. First, the duct main material 2 is
For example, while injecting molten glass from a nozzle, blowing compressed air to the side wall of a container that can be taken out in a strip shape, and spraying an adhesive of a phenol resin, the glass fibers that have been sprayed from a nozzle to become fibrous materials are Clamp on the side wall of the container.

Next, a black paint is applied to the strip-shaped duct main material 2 which has been solidified in a pressure-bonded state and taken out, and a nonwoven fabric 4 is applied.
On one surface and the metal foil with fiber 5 on the other surface. This bonding may be carried out with the adhesive used for bonding the fibrin in the container, or with the adhesive previously applied to the nonwoven fabric 4 and the metal foil 5 with fibers. Thus
The duct main material 2 to which the non-woven fabric 4 and the metal foil 5 with fibers are attached on the front and back is moved to the next cutting and bending steps.

In the cutting and bending process, as shown in FIG. 2 (A), for example, a movable cutting device 12 having a plurality of cutting means 11 and a bending means (not shown) are used to finish into a rectangular cross section as follows. First, the movable cutting device 1
The configuration of No. 2 will be briefly described. The movable cutting device 12 is moved toward and away from the work table 13 by a driving device such as a cylinder (not shown). The cutting means 11 has four pairs of two cutting blades 15, 15, 15a, 15a at intervals corresponding to the length of each side of the tubular body 3. This is one cylinder 3 can be manufactured by one cutting process, but of course, two or one cylinder may be manufactured. Also,
The cutting blades 15 and 15a are set with a span s corresponding to a surplus portion 14 corresponding to a bending margin when the cutting blades 15 and 15a are bent into a rectangular shape. The cutting means 11 includes cutting blades 15 and 15a.
The surplus portion 14 is held between the cutting means 11 and the cutting means 11 and the work table 13
A pick-up member 16 is provided for gripping the surplus portion 14 and then removing the surplus portion 14 when retracting from. The cutting blade 15a at one end of the cutting blades 15 and 15a is shorter than the other cutting blades 15. This is to form the above-mentioned protrusion 2b.

Now, the process for finishing the strip-shaped duct main material 2 fed to the workbench 13 into a rectangular cross section is as follows. (1) With the non-woven fabric 4 side as the surface, the strip-shaped duct main material 2 is fed onto the work table 13 by a length corresponding to the four sides. (2) The movable cutting device 12 is installed on the workbench 13 as the main material 2
Get closer to. (3) The non-woven fabric 4 and the duct main material 2 are cut by pressing the cutting blade 15 while approaching the duct main material 2 on the workbench 13. (4) After the cutting, the cutting blade 15 is retracted from the duct main material 2 and the movable cutting device 12 is retracted. (5) Discard the surplus portion 14 gripped by the plucking member 16 (see FIG. 2A). (6) Cut at the position A which is the tip of the protruding portion 2a. (7) The protruding portion 2b of the duct main material 2 preceding the duct main material 2 from which the surplus portion 14 has been removed by a bending means (not shown)
The main duct material 2 is bent into a square shape so that the same is aligned with the end surface on the opposite side. (8) A metal foil 5a is attached to the corner 2a and integrally joined to form a tubular body having a rectangular cross section.

The air conditioning duct 1 as shown in FIG. 1 is produced as described above. According to such a manufacturing method, since the belt-shaped duct main material 2 is continuously fed out, the air-conditioning ducts 1 each having a quadrangular cross section can be manufactured one after another with a simple flow operation from cutting to bending. Further, since the duct main member 2 is not integrally formed on the four sides but is divided into parts, the bending work can be performed with a relatively small force.

In the cutting step (3), it is not necessary to accurately leave only the metal foil 5 and cut only the duct main material 2, and the duct main material portion that is not slightly cut may be left. . If the duct main material 2 becomes thin, in the bending process,
This is because the cut strip-shaped duct main material 2 is easily bent. Further, the cutting blade 15 is a pair of parallel blades and forms the quadrangular surplus 14, but the diagonal blades adjusted to a predetermined angle form the surplus 14 in an inverted triangular shape. But it doesn't matter.

Further, it is easy to manufacture a T-shaped product or a curved product. Further, even if the cross section is not a quadrangular shape, the point is that it is divided into a plurality of duct main members, so that the deformation of forming a circular cross section is easy.

[0020]

As described above, according to the present invention, the duct main material in which the fiber assembly is formed in a crimped state has rigidity and is bent into a tubular shape having a quadrangular cross section to form a metal with fibers. Since it is surrounded by foil, it has a tubular shape and rigidity, and can be supported as it is on a fixed member of a building without being reinforced by a reinforcing material, or can be used alone.

Further, since the cutting work and the bending work are carried out sequentially in the band-like state, the manufacturing process becomes extremely simple.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of an air conditioning duct according to the present invention.

FIG. 2 is an explanatory view showing an embodiment of a method for manufacturing an air conditioning duct according to the present invention.

[Explanation of symbols]

1 ... Air-conditioning duct, 2 ... Main duct material, 3 ... Cylindrical body, 4 ... Nonwoven fabric, 5 ... Metal foil with fiber.

Claims (2)

[Claims] 1. A tubular body having a quadrangular cross section formed of a duct main material in which a glass fiber aggregate or a lock fiber aggregate is in a crimped state, and a non-woven fabric bonded to an inner surface of the tubular body.
An air conditioning duct composed of a metal foil with fibers joined to the outer surface of the cylindrical body. 2. A plate-shaped duct main material comprising a glass fiber aggregate or a lock fiber aggregate in a pressure-bonded state, which is preliminarily bonded to one surface with a non-woven fabric and to the other surface with a metal foil with fibers, and is fed out in the form of a strip, The pair of cutting blades having a span corresponding to the surplus when bent into the rectangular shape is pressed against the duct main material to cut the duct main material except the metal foil, and then the Excess was removed, the duct main material from which the excess was removed was bent into a rectangular cross section, and both ends were covered with the metal foil and integrally joined to form a tubular body with a rectangular cross section. A method for manufacturing an air-conditioning duct, comprising: