JP2872494B2 - Insulated hose - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in an insulating hose suitable for use as an insulating duct for an insulated drain hose of an air conditioner and other devices.

[0002]

2. Description of the Related Art A flexible soft vinyl chloride hose has been widely used as a heat insulating hose of this kind. For example, as shown in FIG. Spiral partition wall c made of the same material
A heat insulating material d such as a sponge is integrally housed through a via hole, and an iron wire e covered with a vinyl chloride resin f is spirally attached to the inner surface of the inner peripheral wall a to give strength. Have been.

[0003]

However, in an insulated hose to which an iron wire is attached, the iron wire itself does not break even if it is bent frequently, but it slides against the inner peripheral wall a made of soft vinyl chloride. frictional force there is a large possibility to wear in a short period of time the inner peripheral wall a, adiabatic when the inner peripheral wall a corruption
Material d is exposed on the drain passage side, and the heat insulation effect is significantly reduced
In addition, there is a problem that it cannot be used.

Further, when an iron wire is used as a core material, not only does the weight increase and the handleability deteriorates, but also the hose is bent because the vinyl chloride resin-coated iron wire e is integrated with the inner peripheral wall a made of the same material. If this is done, the resin-coated iron wire e repels and impairs the flexibility of the tube wall, so that the bending property is poor and the winding at the time of storage or the like cannot be performed smoothly, and the inner peripheral side of the inner peripheral wall a spirals. Since they are attached, spiral recesses g are formed on both sides of these core wires to increase the flow resistance of the fluid, and when used as a drain hose of an air conditioner, they are contained in dehumidified water. Dust such as cotton dust in the air adheres to the concave portion g, hinders smooth flow of the drain, and causes a problem that clogging occurs.

When a short pipe h is connected to the open end of the hose, there is a risk that water leaks to the outside through the spiral concave portion g. Further, the outer peripheral wall b has the same ratio as the inner peripheral wall a.
Due to the relatively thick thickness, the resin-coated iron wire e
At the same time, the flexibility of the hose is further impaired.
Was. An object of the present invention is to provide a heat insulating hose that can solve such a problem.

[0006]

In order to achieve the above object, an insulated hose according to the present invention is provided in a semi-molten state having a certain width.
The flexible synthetic resin strip is spirally wound at a certain pitch while polymerizing a part of the strip, and the polymerized part is melted.
An inner peripheral wall 1 having an inner surface formed into a smooth surface 1a is formed by attaching and integrating, and a flexible resin core wire 3 made of synthetic resin is helically wound around the outer peripheral surface of the inner peripheral wall 1 so that the flexibility is increased. The core wire 3 is covered with a hollow spiral ridge 2 formed by a part of the soft synthetic resin strip, and the inner ends of both side walls 2b of the hollow spiral ridge 2 are widened. The flexible core wire 3 is provided inside the hollow helical ridge 2 with the gaps 6 between the portions 2b and 2b, and a heat insulating material such as a sponge is provided on the outer peripheral surface of the inner peripheral wall 1. 7 is spirally wound, and a partition wall 4 is formed at the central portion of the heat-insulating material 7 with the central portion of the above-mentioned soft synthetic resin band-shaped material interposed between opposed end surfaces of the heat insulating material 7. While the other side of the soft synthetic resin strip is in close contact with the outer surface of the heat insulating material 7, the side end is wound first. It has a structure in which the outer peripheral wall 5 is formed by integrally welding to the outer end of the formed partition wall 4.

[0007]

[Action] Since the tube wall inner surface 1 of the hose is formed into a flat smooth surface 1a is substantially the same diameter over the entire length, of course distribution of the drain is smoothly performed, prevents adhesion of dust As a result, no clogging occurs and the connection with the short pipe connected to the open end is made watertight. Furthermore, the flexible core wire 3, the hollow spiral ridge 2 is its side wall portions 2b, the flexible core wire 3 and 2b to end spread shape and the both side wall portions 2b with being furnished to the hollow spiral ridge 2 , 2b, the wall portion between the inner ends of the hollow spiral ridges 2 is separated from the core wire 3 in the inner peripheral wall 1 of the hose which receives a compressive force when the hose is bent. The hose is bent in a wave shape, and the bending absorbs the compressive stress, and the core wire 3 and the hollow helical ridge 2 slide relatively to exhibit good flexibility, and the upper core wire 3 is bent. The transmission of the stress to the inner peripheral wall 1 can be reduced to prevent the breakage.

Further, when the hose is bent, it is flexible.
The hollow spiral ridge 2 is damaged by the elastic force 2 of the core wire 3
Also, the hollow spiral ridge 2 is provided on the outer peripheral surface of the inner peripheral wall 1,
The heat insulating material 7 is provided between the inner peripheral wall 1 and the outer peripheral wall 5.
So that the heat insulating material 7 is exposed to the drain passage side.
There is no fear that the heat insulating effect of the heat insulating material 7 is exhibited.
And that the drain circulation is impaired at all
No, it can be used. The outer peripheral wall 5 covering the heat insulating material 7 is made of a spirally wound soft synthetic resin.
While keeping the other side of the strip in close contact with the outer surface of the heat insulating material 7,
The side edge is integrally fused with the outer end of the partition wall that was wound earlier.
Since it is formed by attaching, the thickness becomes extremely thin, and the curvature of the hose can be further improved.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
1 is the inner circumferential wall of a hose having a predetermined thickness made of soft synthetic resin such as soft vinyl chloride resin, Yes formed into a flat smooth surface 1a became uniform diameter over the entire length of the inner peripheral surface thereof, the outer peripheral surface Further, a hollow spiral ridge 2 also made of a soft synthetic resin such as a soft vinyl chloride resin is integrally formed with an integral winding pitch in the length direction. The hollow spiral ridge 2 has an outer top wall portion 2a formed in a semicircular shape and the top wall portion 2a.
The top wall 2a extends between the inner ends of both side walls 2b, 2b connected to both ends of 2a.
And is integrally connected to the outer peripheral surface of the inner peripheral wall 1.

Reference numeral 3 denotes a circular or elliptical flexible section provided inside the hollow spiral ridge 2 in a continuous spiral shape without being adhered to the inner peripheral surface of the hollow spiral ridge 2 and the outer peripheral surface of the inner peripheral wall 1. The core wire is made of an olefin-based resin such as polypropylene or polyethylene having a moderate elasticity, the diameter of which is approximately equal to the inner diameter of the top wall 2a of the hollow spiral ridge 2, and the outer peripheral surface is formed of the top wall. While being in contact with the inner surface, a gap 6, 6 is provided between the inner peripheral surface and both side walls 2b, 2b of the hollow spiral ridge 2.
Are formed. The core wire 3 may be formed of a suitable hard synthetic resin material other than the olefin resin.

4 is a top wall portion of the hollow spiral ridge 2 whose inner peripheral end is
2a is a spiral partition wall made of a soft synthetic resin such as a soft vinyl chloride resin integrally connected to the outer peripheral surface of the outer peripheral wall 5a. A spiral heat insulating material 7 such as a sponge is filled in a spiral space surrounded by the spiral partition wall 4 and the inner and outer peripheral wall surfaces 1 and 5, and the heat insulating hose is provided therein. Is formed.

Reference numeral 8 denotes a short pipe made of vinyl chloride for forming a drain port fixed to both end openings of the heat-insulating hose. The end of the inner wall 1 of the hose is provided on the outer peripheral surface of an inner pipe part 8a protruding from the inner end side. The outer peripheral wall 5 of the hose is adhered to the inner peripheral surface of the outer tube portion 8c protruding from the outer periphery of the inner tube portion 8a via the flange portion 8b.

[0013] With this configuration, when used, the flat
When the flow resistance of the drain is reduced by the smooth inner peripheral surface 1a and smoothly distributed, and this hose is bent,
As shown in FIG. 2, on the inner peripheral wall side subjected to the compressing action, both side walls 2b, 2b of the hollow spiral ridge 2 integrated with the inner peripheral wall 1 are pressed in a direction in which they approach each other by the compressing action. Then, due to the presence of the gaps 6, 6, the inner peripheral wall between the side walls 2b, 2b is deformed so as to approach each other so as to wrap the inner peripheral surface of the core wire 3, and the inner peripheral wall portion between the two side walls 2b, 2b is inward of the hose. It will bend and project toward it.

Accordingly, the deformation of the hollow spiral ridge 2 and the inner peripheral wall 1 absorbs the compressive stress, so that the hose can be easily and largely bent. The tension and the compressive stress act equally on the wall and the inner tube wall, respectively. In this hose, the tensile stress acting on the outer peripheral wall 5 is also reduced by the inner peripheral wall 1.
The hose can be bent without deforming almost flatly. In addition, the flexible core wire 3 made of an olefin-based resin allows the hose to exhibit appropriate strength and shape-retaining properties, and immediately returns to a circular shape even if the hose is deformed flat by stepping or the like due to its elasticity.

In order to obtain such a synthetic resin insulated hose, a belt made of a soft synthetic resin such as soft vinyl chloride in a semi-molten state having a certain width is extruded from a forming nozzle while being formed on a rotary shaft for forming as is well known. When spirally wound around
As shown in FIG. 3, a flexible core wire 3 made of a hard synthetic resin such as a polypropylene resin is provided on a horizontal end portion 11a of the belt-shaped material 11.
Spirally wound with the same pitch, and its horizontal end
Core wire 3 with part of horizontal band 11b connected to 11a wound first
Along with covering without adhering on the top, welding of the horizontal side end 11a and the horizontal band 11b of the band-shaped material 11 to be polymerized with each other,
The inner peripheral wall 1 is formed by integration.

Furthermore, a flexible rod-shaped sponge heat insulating material 7 is spirally wound on the horizontal band portion 11b of the inner peripheral wall 1, and the band material 11 is placed between the opposing side end faces of the heat insulating material 7.
The inclined partition wall 4 is formed with the central portion 11c interposed therebetween.
Connects to the central part 11c of the strip 11 on which the inclined partition wall 4 is formed
While the other side portion 11d of the strip material 11 is in close contact with the outer surface of the heat insulating material 7, the inclined partition wall 4 having the side end portion 11e wound first is
The outer peripheral wall 5 is formed by integrally welding the outer end portion 11f of the central portion 11c of the belt-shaped material 11 to be formed.

At this time, since the core wire 3 is formed of an olefin resin such as polypropylene or polyethylene having a non-adhesive property with a soft synthetic resin such as soft vinyl chloride, or other hard synthetic resin, a belt-shaped material, that is, a hose is used. The hollow spiral ridge 2 is formed by the band-shaped material portion covering the core wire 3 without adhering to the tube wall portion. In the above embodiment, the partition wall 4 is inclined. However, as shown in FIG. 4, the partition wall 4 is formed in a substantially vertical shape, and the outer end thereof is integrated with the inner surface of the ridge of the outer peripheral wall 5 which is bent in a wave shape. Alternatively, as shown in FIG. 5, a central portion of the outer peripheral surface of the inner peripheral wall 1 between the core wires 3 and the valley inner surface of the outer peripheral wall 5 bent in a wave shape may be integrally connected. It is good also as the structure provided.

[0018]

As described above, according to the heat insulating hose of the present invention, the heat insulating hose is provided with the heat insulating material 7 between the inner and outer peripheral walls 1 and 5, wherein the inner peripheral wall 1 is in a semi-molten state having a constant width. of <br/> soft synthetic resin-made strip material with a constant pitch while polymerizing the partially welded and polymerized portion Shi wound helically,
Inner peripheral wall whose inner surface is flat surface 1a by being integrated
In addition to being able to reduce the flow resistance of the drain and enable smooth distribution, it is possible to discharge dust and the like contained in air without adhering when used in an air conditioner. As a result, clogging can be prevented, and furthermore, the outer peripheral surface of the short pipe connected to the open end of the hose and the smooth surface 1a of the inner peripheral wall 1 are completely adhered to each other so that water leakage does not occur. It can be a watertight structure.

Further, a flexible core wire 3 made of synthetic resin is spirally wound around the outer peripheral surface of the inner peripheral wall 1, and this flexible core wire 3 is formed by a hollow spiral formed by a part of the soft synthetic resin strip. The hollow spiral ridge 2 is covered with the ridge 2 and the inner ends of the side walls 2b, 2b of the hollow spiral ridge 2 are widened.
The flexible core wire 3 with the gaps 6
When the hose is bent, a hollow spiral ridge 2 is formed on the inner peripheral wall 1 of the hose that receives a compressive force.
The wall portion between the inner ends of the hose can be curvedly deformed in a wave shape in the hose while being separated from the core wire 3, and this deformation can absorb the compressive stress and exhibit good flexibility. In addition, the transmission of the bending stress of the flexible core wire 3 to the inner peripheral wall 1 can be reduced to prevent breakage thereof.

Also, when the hose is bent, the flexible core
Even if the hollow spiral ridge 2 is broken by the elastic force 2 of the wire 3,
The hollow spiral ridge 2 is provided on the outer peripheral surface of the inner peripheral wall 1, and
The heat insulating material 7 is provided between the inner peripheral wall 1 and the outer peripheral wall 5.
Therefore, there is a possibility that the heat insulating material 7 is exposed to the drain passage side.
Without, and Turkey to effectively exhibit the heat-insulating effect of the heat insulating material 7
And that the drain circulation is impaired at all
No, it can be used for a long time. further,
The outer peripheral wall 5 covering the heat insulating material 7 is made of a spirally wound soft material.
The other side of the synthetic resin band is brought into close contact with the outer surface of the heat insulating material 7.
While wrapping its side end first to the outer end of the partition wall
Because it is formed by welding together,
The thickness of the hose is extremely thin, making the hose more bendable.
be able to.

[Brief description of the drawings]

FIG. 1 is a partially sectional side view showing an embodiment of the present invention;

FIG. 2 is a partially enlarged cross-sectional view showing a deformed state when curved.

FIG. 3 is a longitudinal sectional side view for explaining a manufacturing method;

FIG. 4 is a partially enlarged cross-sectional view showing another embodiment of the present invention;

FIG. 5 is a partially enlarged sectional view showing still another embodiment of the present invention;

FIG. 6 is a partial longitudinal side view of a conventional heat insulating hose.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Inner peripheral wall 1a Smooth surface 2 Hollow spiral ridge 3 Flexible core wire 4 Spiral partition wall 5 Outer peripheral wall 6 Void part 7 Thermal insulation

Continuation of the front page (56) References JP-A-62-227633 (JP, A) JP-A-53-94574 (JP, A) Fully open 49-116610 (JP, U) Really open 52-139527 (JP , U) Actually open sho 59-47194 (JP, U) Actually open sho 61-55572 (JP, U) Really open sho 63-49079 (JP, U) Really open sho 56-59388 (JP, U) 56-55512 (JP, Y2) Jikken 63-9835 (JP, Y2) (58) Fields investigated (Int. Cl. ⁶ , DB name) H16L 9/00-9/22 H16L 11/00-11 / 24 H16L 57/00-58/18

Claims (1)

(57) [Claims] A semi-molten soft synthetic resin strip having a fixed width is spirally wound at a fixed pitch while partially polymerizing the strip, and the polymerized portion is welded and integrated.
As a result, an inner peripheral wall 1 having an inner surface formed into a smooth surface 1a is formed, and a flexible resin core wire 3 made of synthetic resin is spirally wound around the outer peripheral surface of the inner peripheral wall 1 so that the flexible core wire 3 is formed as described above. It is covered with a hollow spiral ridge 2 formed by a part of a soft synthetic resin strip, and the inner ends of both side walls 2b, 2b of the hollow spiral ridge 2 are widened. The flexible core wire 3 is provided inside the hollow helical ridge 2 with the gaps 6 and 6 between them, and a heat insulating material 7 such as a sponge is spirally wound around the outer peripheral surface of the inner peripheral wall 1. The partition wall 4 is formed at the central portion of the heat-insulating material 7 with the central portion of the flexible synthetic resin strip interposed between the opposite end surfaces of the heat-insulating material 7. A partition wall in which the other end of the band-shaped material is closely wound on the outer surface of the heat insulating material 7 and the side end thereof is wound first. A heat insulating hose characterized in that an outer peripheral wall (5) is formed by integrally welding to an outer end portion of the outer hose (4).