JP2555749Y2 - Ventilation duct - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilation duct, and more particularly to a ventilation duct suitable as a duct for air-conditioning of railway vehicles such as trains and trains.

[0002]

2. Description of the Related Art Conventionally, as this kind of ventilation duct,
For example, as shown in Japanese Utility Model Publication No. 51-42092, a synthetic resin film is wound on a spirally wound hard steel wire, and glass fiber reinforced aluminum is provided on the outer peripheral surface thereof through a sound absorbing and insulating material made of glass wool. What is covered with foil is generally known. In addition, Jiko 46-10387
It is generally known that a non-combustible heat insulating material is wound around the outer peripheral surface of a metal corrugated flexible tube as disclosed in Japanese Patent Application Laid-Open Publication No. H11-209,036.

[0003] However, the ventilation duct has a circular cross-section and is structurally inferior in rigidity and dew-proof property, so that it has a small piping space and is easily affected by the temperature of the outside air. Therefore, it is unsuitable as an air conditioning duct for railway vehicles, and is used exclusively for single-family homes and apartment houses.

[0004]

Therefore, a fiber cloth which has been subjected to a dew-proof treatment as disclosed in Japanese Utility Model Publication No. 44-5412 and Japanese Utility Model Publication No. 50-8465 is used as a duct for air conditioning of railway vehicles. However, since these ducts are made of cloth, they change shape during air transfer and have resistance, and their rigidity is weak and it is difficult to feed them in a desired direction when arranging vehicles. was there. Also,
There has been a problem that even when the dew-proofing treatment is performed, the effect is small because dew condensation easily occurs on the cloth itself.

It is an object of the present invention to provide a ventilation duct designed to solve the problems of the above-mentioned conventional products, and which has a high workability and a high dew-proof property.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above, and has an adhesive applied to the outer periphery of a metal corrugated flexible tube having a rectangular cross section and each corner portion curved in an arc shape. A ventilation duct made of a felt-like mineral fiber and encased with an adhesive tape made of glass fiber reinforced aluminum foil on the outer peripheral surface thereof.

Here, since the metal corrugated flexible tube is made of metal, it has good shape retention and is not easily crushed. The reason why the corner portion is formed in an arc shape is that the tube itself is easily bent. . The reason why the cross section is square is to provide the ventilation duct with an effective volume in a narrow space between the outer wall and the inner wall of the vehicle and having a substantially uniform width.

[0008] The above-mentioned pressure-sensitive adhesive tape has a tensile strength increased by glass fiber and a heat insulating effect enhanced by reinforced aluminum foil.
It is nonflammable. The pressure-sensitive adhesive used for the pressure-sensitive adhesive tape can be appropriately selected and employed as long as it has properties similar to those of the pressure-sensitive adhesive. Further, the adhesive tape can be closed at the tube end portion of the metal corrugated flexible tube by being bent toward the inner surface, thereby increasing the tensile strength and the heat insulating effect on the entire tube. Can be.

The adhesive is used to connect the metal corrugated flexible tube and the dew-proofing material, and can be appropriately selected and used as long as it has heat resistance from its disposition position. Further, the dew-proof material has such a heat insulating effect that no dew condensation occurs on the surfaces even when the temperature of the front and back surfaces of the dew-proof material is different.

[0010] By attaching an adapter to at least one end of the metal corrugated flexible tube, piping of the ventilation duct can be facilitated. This adapter has a substantially tubular shape and has a locking flange at an outer peripheral edge at one end thereof, and the locking flange is connected to a member at a position where the ventilation duct is provided. It is fixed.

[0011]

According to the present invention, since the ventilation duct is made of a member having high rigidity, flexibility, heat insulation and dew-proof property, the workability and dew-proof property of the ventilation duct can be improved.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 1 is a partially cutaway perspective view showing an embodiment of a ventilation duct according to the present invention, and FIG.
It is explanatory drawing which showed the cross-sectional shape near the edge part of one Example. FIG. 3 is an explanatory view showing a state in which the embodiment of FIG. 1 is cut in the longitudinal direction, and FIG. 4 is an explanatory view schematically showing a construction state of this embodiment in a cross section.

The ventilation duct shown in this embodiment has a metal corrugated flexible tube 1 having a rectangular cross section and each corner portion bent in an arc shape, and an adhesive on the outer periphery of the metal corrugated flexible tube 1. The main part is composed of a dew proof material 3 made of felt-like mineral fiber and a glass fiber reinforced aluminum foil adhesive tape 4 wound around the outer circumference of the dew proof material 3 disposed through is there. Further, the adhesive tape 4 is provided at the end of the ventilation duct from the outside to the inside to protect the end face thereof, and further, a substantially tubular adapter having a locking flange on one outer periphery of the edge. 5 is adhered by an adhesive.

Then, as shown in FIG.
In the space between the inner wall 7 and the locking flange of the adapter 5, connection fittings 8, 8 having an L-shaped cross section are connected via packings 9, 9. In addition, this adapter 5
Is connected to the ventilation duct adapter 5 having the same configuration from above in the figure, whereby the construction of the ventilation pipe is completed.

In the above embodiment, since a metal flexible tube having high rigidity is used, it can be fed into a narrow space from one side, so that the workability is high and the sectional shape is not deformed. Since the adhesive tape made of material and glass fiber reinforced aluminum foil is disposed on the outer periphery of the metallic flexible tube,
It has the effect of high heat insulation and high durability.

[0016]

According to the present invention, an anticorrosion material made of felt-like mineral fiber is coated on the outer periphery of a metal corrugated flexible tube having a rectangular cross section and each corner portion curved in an arc via an adhesive. Wrap and adhesive tape made of glass fiber reinforced aluminum foil on the outer surface to form a ventilation duct,
Since the ventilation duct is made of a member having high flexibility, heat insulation and dew-proofing properties, there is an effect that workability and dew-proofing properties are high.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view of an embodiment of a ventilation duct according to the present invention.

FIG. 2 is an explanatory diagram showing a cross-sectional shape near an end of the embodiment of FIG. 1;

FIG. 3 is an explanatory view showing a state in which the embodiment of FIG. 1 is cut in a longitudinal direction.

FIG. 4 is an explanatory diagram schematically showing a construction state of the embodiment in a cross section.

[Description of sign]

 DESCRIPTION OF SYMBOLS 1 Metal corrugated flexible tube 2 Adhesive 3 Dewproofing material 4 Adhesive tape 5 Adapter

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-47220 (JP, A) JP-A 57-89089 (JP, U) JP-A 56-160392 (JP, U) JP-A 57-890392 76032 (JP, U) Japanese Utility Model Hei 3-92357 (JP, U) Japanese Utility Model Showa 46-10387 (JP, Y1) Japanese Utility Model Showa 44-5412 (JP, Y1) Japanese Utility Model Showa 51-42092 (JP, Y2) 50-8465 (JP, Y2)

Claims (3)

(57) [Scope of request for utility model registration] 1. A dewproofing material 3 made of felt-like mineral fiber is enclosed via an adhesive 2 around an outer periphery of a metal corrugated flexible tube 1 having a rectangular cross section and each corner portion curved in an arc shape. A ventilation duct, wherein an adhesive tape 4 made of glass fiber reinforced aluminum foil is wound around the outer peripheral surface thereof. 2. The ventilation duct according to claim 1, wherein the adhesive tape is bent toward an inner surface at a pipe end of the metal corrugated flexible pipe, and the pipe end is closed. . 3. The ventilation system according to claim 1, wherein at least one end of the metal corrugated flexible tube 1 is fitted with an adapter 5 having a locking flange on an outer peripheral edge thereof. duct.