JPH09478A - Hose for electric vacuum cleaner - Google Patents

Abstract

PURPOSE: To make it possible to form the inside surface of a hose to a smooth surface and to prevent the peeling or exposure from coating of a resin coated reinforcing wire by spirally winding the reinforcing wire on the outer side of an inside layer consisting of an extrusion molded tube which is cooled and coating the outer side thereof with an outer layer consisting of an extrusion molded tube. CONSTITUTION: The hose 1 for an electric vacuum cleaner has the inside layer 2 consisting of the extrusion molded tube made of a soft polyvinyl chloride(PVC) resin and is spirally wound with the resin coated reinforcing wire 3 on the outer side thereof. The outer side of the wire is coated with the outside layer 4 consisting of the extrusion molded tube made of the soft PVC resin. At this time, the inside layer 2 and the outside layer 4 are thermally fused exclusive of the part where the reinforcing wire 3 is interposed. The reinforcing wire 3 consists of a synthetic resin coating 7 formed by integrally enclosing a coated conductor 5 consisting of a coated steel wire and a hard steel wire 6. The reinforcing wire is fused to the outside layer 4 but is held unadhered with the inside layer 2. Since the inside surface of the inside layer 2 is smooth according thereto, the suction resistance of air is lowered and disturbance is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a hose for an electric vacuum cleaner,
In particular, it relates to a so-called tube type vacuum cleaner hose in which the tube wall of the hose is formed of an extruded tube.

[0002]

2. Description of the Related Art Conventionally, a hose 10 for an electric vacuum cleaner
As shown in FIG. 6, the reinforcing wire 11 is spirally wound.
Soft synthetic resin tube such as soft vinyl chloride on the outside of the tube 1
This soft synthetic resin tube 1 is formed by extrusion molding 2 and coating.
It was composed of a flexible hose with 2 as the hose body. The reinforcing wire 11 is composed of a coated conductive wire 13 and a synthetic resin coating 15 that integrally surrounds a hard steel wire 14, so that the hose can be shaped and reinforced and an electric circuit for a remote controller or the like can be configured. . The vacuum cleaner hose 10 includes a mandrel (not shown) that travels straight, and a reinforcing wire 11 is spirally wound around the outer circumference of the mandrel (not shown) at a single pitch or a double pitch, and a soft synthetic resin tube such as soft vinyl chloride is provided on the outside thereof. 12 is extruded, covered and shrunk, then cooled and pulled out of the mandrel.

However, in the above-described vacuum cleaner hose 10, since the concave portion 16 is formed at the boundary between the tube 12 and the reinforcing wire 11 and the inner surface of the hose is not flat, the suction resistance of air is large and turbulent flow occurs. The synthetic resin coating 15 is adhered to the soft synthetic resin tube 12 at the time of molding, but the reinforcing wire 1 is used for a long period of time.
There is a case where 1 causes adhesive detachment from the tube 12 and hinders use. The synthetic resin coating 15 is damaged and the inner surface of the hose is coated with a conductive wire 1.
3 and hard steel wire 14 may be exposed. There was a problem such as.

[0004]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a hose for a vacuum cleaner of the tube type which solves the above-mentioned problems, in which the inner surface of the hose is formed into a smooth surface, and The purpose of the present invention is to provide a hose for an electric vacuum cleaner capable of preventing the harmful effects of the peeling of the reinforcing wire from the tube and the exposure of the reinforcing wire from the coating.

In order to achieve the above object, the hose for an electric vacuum cleaner according to the present invention has a resin-coated reinforcing wire spirally wound on the outer side of an inner layer made of a cooled extruded tube, and extruded on the outer side. It is formed by coating an outer layer made of a tube and fusing or adhering the outer layer to the inner layer. Further, a resin-coated reinforcing wire is spirally wound on the outer side of the inner layer made of the cooled extruded tube, the intermediate layer made of the extruded tube is covered on the outer side thereof, and the outer layer made of the extruded tube is placed on the outer side of the intermediate layer. And an outer layer, an intermediate layer and an inner layer are fused or bonded to form a vacuum cleaner hose.

According to the present invention, the extruded tube constituting the inner layer is cooled and then the reinforcing wire is wound so that the inner surface is always kept smooth without being broken or deformed during winding. Therefore, the suction resistance of air can be made extremely small to prevent turbulent flow and allow smooth flow, and there is no risk of dust being caught in the hose. In addition, the extruded tube of the inner layer is cooled, but the extruded tube (outer layer or intermediate layer) that is extruded and coated on the outside is bonded and integrated with the inner layer by heat fusion or an adhesive. Since the wire is sandwiched between the two, there is no problem of peeling the resin-coated reinforcing wire from the tube or exposing the resin-coated reinforcing wire from the resin coating.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the vacuum cleaner hose according to the present invention will be described below with reference to the accompanying drawings. Figure 1,
The vacuum cleaner hose 1 shown in FIG. 2 includes an inner layer 2 made of a cooled soft vinyl chloride resin extruded tube,
It is composed of a reinforcing wire 3 spirally wound on the outer side thereof and an outer layer 4 made of an extruded tube made of a soft vinyl chloride resin coated on the outer side thereof. The inner layer 2 and the outer layer 4 are composed of the reinforcing wire. It is heat-sealed except for the portion where 3 is interposed. The reinforcing wire 3 is composed of a synthetic resin coating 7 integrally surrounding a coated conductive wire 5 coated with a copper wire and a hard steel wire 6, and is fused with the outer layer 4 but not with the inner layer 2. It is in a bonded state.

The vacuum cleaner hose 1 is molded as follows. First, a tube is extruded from a crosshead of an extruder around a straight mandrel and sufficiently cooled to form an inner layer 2. To cool the tube, a cooled mandrel is used, and the molded tube is cooled using an appropriate cooling means. Next, the reinforcing wire 3 is spirally wound on the inner layer 2 at a double pitch, and a tube is extruded from the crosshead of another extruder to cover the periphery thereof to form the outer layer 4. afterwards,
By pulling out the mandrel, a hose for a vacuum cleaner having excellent flexibility can be obtained.

FIG. 3 shows another embodiment of the hose for an electric vacuum cleaner according to the present invention, in which the tube wall has three layers, and the extrusion molding is similarly performed between the inner layer 2 and the outer layer 4 in the above-mentioned embodiment. The intermediate layer 8 made of a tube is provided, and the intermediate layer 8 and the outer layer 4 are provided.
A reinforcing thread 9 is interposed between them along the axial direction.
The intermediate layer 8 is integrated with the inner layer 2 and the outer layer 4 by heat fusion.

4 and 5 show another embodiment of the hose for an electric vacuum cleaner according to the present invention. As the reinforcing wire 3, a hard steel wire 6 coated with a synthetic resin 7 is used, and this is double pitched. Since it is a wound one and the other structure is the same as that of the embodiment of FIGS. 2 and 3, the description thereof will be omitted.

In the present invention, the tube walls of the multi-layer structure are not limited to fusion-bonding, but may be bonded and integrated by using an adhesive. Further, in order to reduce the increase in the weight of the hose, it is preferable that the tube forming each layer is thin, for example, a tube having a thickness of 0.1.
Those having a wall thickness of 3 to 0.5 mm are particularly preferable. In addition, the extruded tube that forms the inner layer of the hose is made of a thermoplastic resin having good wear resistance, such as a thermoplastic urethane resin, a thermoplastic elastomer (polyester, olefin, styrene, etc.) or a thermoplastic resin and rubber. If formed from a blended product, it can be a durable vacuum cleaner hose that will not be damaged by frequent use in industrial cleaners, etc., and is also suitable for applications that require abrasion resistance on the inner surface. It can be used as a hose.

[Brief description of drawings]

FIG. 1 is a partially longitudinal side view of a vacuum cleaner hose showing an embodiment of the present invention.

FIG. 2 is an enlarged partial sectional view of a hose for an electric vacuum cleaner showing an embodiment of the present invention.

FIG. 3 is an enlarged partial sectional view of a vacuum cleaner hose showing another embodiment of the present invention.

FIG. 4 is an enlarged partial sectional view of a vacuum cleaner hose showing another embodiment of the present invention.

FIG. 5 is an enlarged partial sectional view of a vacuum cleaner hose showing another embodiment of the present invention.

FIG. 6 is an enlarged partial sectional view of a conventional hose for an electric vacuum cleaner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Vacuum cleaner hose 2 ... Inner layer 3 ... Reinforcing wire 4 ... Outer layer 5 ... Coated conducting wire 6 ... Hard steel wire 7 ... Synthetic resin coating 8 ... Intermediate layer 9 ... Reinforcing yarn

Claims (2)

[Claims] 1. A resin-coated reinforcing wire is spirally wound on the outside of a cooled extruded tube, the outer layer of which is extruded tube is coated on the outside, and the outer layer is fused or adhered to the inner layer. A hose for an electric vacuum cleaner, which is characterized by: 2. A resin-coated reinforcing wire is spirally wound on the outer side of an inner layer made of a cooled extruded tube, an intermediate layer made of the extruded tube is covered on the outer side thereof, and an extruded tube is made on the outer side of the intermediate layer. A hose for an electric vacuum cleaner, which is formed by coating an outer layer made of, and fusing or adhering the outer layer, the intermediate layer, and the inner layer.