JPH0713632Y2 - Hose for vacuum cleaner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an improvement of a suction hose attached to an electric vacuum cleaner.

[Conventional technology]

Conventionally, as a suction hose for an electric vacuum cleaner, a flexible soft vinyl chloride hose has been widely used, and a hollow spiral ridge formed on the pipe wall or the outer peripheral surface of the pipe wall is coated with the same resin. The steel wire for energization is continuously spirally incorporated and integrated with the pipe wall, and the electric vacuum cleaner is operated through the steel wire by a hand switch.

[Problems to be solved by the device]

However, according to the suction hose having the above structure, since the coating resin for the steel wire is integrally adhered to the pipe wall made of soft vinyl chloride, the resin is often bent or pulled during use, and the resin is removed by the steel wire. There is a risk that the coating layer and the tube wall will be worn out in a short period of time, air leakage will occur, and the tube cannot be used.

Further, when the hose is stepped on with a foot and deformed into a flat shape, the steel wire buckles and does not return to its original shape, which makes it difficult to use.

Further, as described above, since the steel wire is integrated with the pipe wall, when the hose is tried to bend, the steel wire repels and the flexibility of the pipe wall is impaired. When it is bent, tensile stress acts on the outer pipe wall and compressive stress acts on the inner pipe wall with respect to the center of the hose, so that it is integrated with the steel wire. There was a problem that the existing pipe wall was destroyed by the steel wire.

An object of the present invention is to provide a suction hose for an electric vacuum cleaner that can solve such problems.

[Means for Solving the Problems]

In order to achieve the above object, the suction hose for a vacuum cleaner of the present invention has a flat surface (2) whose inner peripheral surface has the same diameter in the longitudinal direction.
A hollow spiral ridge (3) made of the same resin as the pipe wall (1) on the outer peripheral surface of the pipe wall (1) made of soft vinyl chloride
In a hose for an electric vacuum cleaner in which a resin-coated copper wire (4) is provided inside the hollow spiral ridge (3), both side walls of the hollow spiral ridge (3) are By forming a divergent shape toward the end and integrally connecting the inner ends of the both side ends to the outer peripheral surface of the pipe wall (1), the length of the pipe wall (1) between the inner ends can be reduced. A pipe made of the soft vinyl chloride is formed on the flexible wall portion (5) that is bendable toward the inside longer than the diameter of the resin-coated copper wire (4), and the coating layer of the copper wire (4) is made of the soft vinyl chloride. The wall (1) is made of non-adhesive olefinic synthetic resin such as polyethylene, and the resin-coated copper wire (4) is adhered to the hollow spiral ridge (3) without being bonded to the hollow spiral ridge (3). The structure is installed in (3).

Further, in the above structure, the inside of the hollow spiral ridge (3) is divided into upper and lower parts by a corrugated partition wall (9) made of soft vinyl chloride resin and having a bimodal cross section, and the valley part (9a) of the partition wall (7) is divided. ) Is integrally welded to the pipe wall (1), and the resin is placed in the central space (3c) formed by the facing surfaces of the valley (9a) and the hollow spiral ridge (3). A reinforcing core wire (10) made of an olefinic synthetic resin such as polyethylene having a diameter larger than that of the coated copper wire (4) is continuously spirally mounted, and both side space portions (9b) (9b) are formed. 3d)
A pair of the coated copper wires (4) and (4) may be internally provided in (3d) in a continuous spiral shape, and further, a narrow flat resin thread stretched in the tube wall (1) in the longitudinal direction. It is preferable to embed a reinforcing sheet (11) formed by vertically and horizontally combining and integrating strips.

[Action]

Since the inner peripheral surface of the tube wall of the hose is formed as a flat surface (2) having substantially the same diameter over the entire length, the air can flow smoothly, and the hollow spiral ridge (3) can also be used. The resin-coated copper wire (4) that has been installed is formed of an olefin-based synthetic resin that is non-adhesive to soft vinyl chloride whose coating layer forms the tube wall (1) and the hollow spiral ridge (3). The hollow spiral ridge (3) is not attached to the interior of the hollow spiral ridge (3), and both side walls of the hollow spiral ridge (3) are flared toward the inner end. The inner end of the pipe wall (1) is integrally connected to the outer peripheral surface of the pipe wall (1) so that the length of the pipe wall (1) between the inner ends is longer than the diameter of the resin-coated copper wire (4). Since it is formed on the flexible tube wall (5) that can be bent toward, the flexibility inside the hose that receives a compressive force when the hose is bent The wall portion (5) separates from the resin-coated copper wire (4) and bends in a wavy shape in the hose to absorb the compressive stress, and the resin-coated copper wire (4) and the hollow spiral ridge (3) The pipe is slid relative to each other to exhibit good flexibility and extensibility in the longitudinal direction, and furthermore, the bending stress of the resin-coated copper wire (4) is reduced to be transmitted to the pipe wall (1). It is possible to prevent damage to the wall (1).

Furthermore, since the coating layer of the copper wire (4) inside the hollow spiral ridge (3) is made of an olefinic synthetic resin such as polyethylene, it has excellent heat resistance and elasticity, and has a flattened shape when accidentally stepped on. Even if the wire is deformed into a circular shape, it is immediately restored to a circular shape. At that time, the copper wire (4) also adapts to the deformation and the restoration.

Further, the inside of the hollow spiral ridge (3) is divided into upper and lower parts by a corrugated partition wall (9) made of a soft vinyl chloride resin and having a bimodal cross section, and the valley (9a) and the hollow spiral ridge (3) are divided. ) A reinforcing core wire (10) made of an olefin-based synthetic resin such as polyethylene having a diameter larger than that of the resin-coated copper wire (4) is continuously spirally provided inside a central space (3c) formed by the surface facing the In addition, if the pair of coated copper wires (4) and (4) are continuously spirally provided inside the space portions (3d) and (3d) formed in the mountain portions (9b) and (9b), the reinforcing core wire ( By 10), more excellent pressure resistance and resilience can be exhibited, and a pair of coated copper wires (4) in the space parts (3d) (3d) on both sides.
(4) can be used for convenience as a hand switch or for driving a hand switch and a power brush, and in addition, a narrow flat resin thread stretched in the length direction is lengthwise and crosswise in the pipe wall (1). Reinforcement sheet (1
By embedding 1), it can withstand excessive tensile force and can be used for a long time.

〔Example〕

An embodiment of the present invention will be described with reference to the drawings. In FIGS. 1 and 2, (1) is a tube wall of a hose made of a soft vinyl chloride resin having a constant thickness, the inner peripheral surface of which is the same over the entire length. It is formed on a flat surface (2) having a diameter, and a hollow spiral ridge (3) also made of soft vinyl chloride resin is integrally formed on the outer peripheral surface thereof at a constant winding pitch in the longitudinal direction. is there.

The outer top wall portion (3a) of the hollow spiral ridge (3) is curved in a semi-circular shape, and both side wall portions (3b) (3b) connected to both ends of the top wall portion (3a) are expanded. The inner end of the pipe wall (1) is integrally connected to the outer peripheral surface of the pipe wall (1), and the length of the pipe wall (1) between the connecting portions (7) and (7) is extended. , Which is longer than the diameter of the resin-coated copper wire (4) described later and is bendable toward the inside.
It is formed in (5).

(4) is a resin-coated copper wire having a circular cross-section, which is arranged in a continuous spiral shape in the hollow spiral ridge (3), and the coating resin is made of polyethylene resin having appropriate elasticity and has a diameter of The hollow spiral ridge (3) has a diameter equal to or slightly smaller than the inner diameter of the ceiling wall (3a), and the coating resin layer (6) has a hollow spiral ridge (3) and a pipe wall (1). ) Is not integrally attached to the outer peripheral surface of the hollow interior, and voids (8) and (8) are formed between the inner peripheral surface and both side wall portions (3b) and (3b) of the hollow spiral ridge (3). It has been done.

With this configuration, when you bend this hose,
As shown in FIG. 3, in the inner pipe wall portion subjected to the compression action, the hollow spiral ridge portion (3) integrated with the pipe wall (1).
Both side wall portions (3b) (3b) of the two are subjected to a pressing force in a direction in which they approach each other due to the compression action, and the void portions (8) (8)
And the side walls (3a) of the resin-coated copper wire (4) are deformed so as to wrap around the inner peripheral surface of the resin-coated copper wire (4).
The flexible wall portion (5) between the connection portions (7) and (7) of (3a) is bent and deformed toward the inside of the hose to project.

Therefore, the compressive stress is absorbed by the deformation of the hollow spiral ridge (3) and the flexible wall (5), the hose can be easily and largely bent, and in the conventional hose, From this, tensile and compressive stresses are equally applied to the outer pipe wall and the inner pipe wall, but in this hose, the tensile stress acting on the outer pipe wall is also absorbed by the deformation of the inner pipe wall. Therefore, the hose is bent without being deformed into a flat shape.

When the hose is compressed or stretched in the longitudinal direction, the resin-coated copper wire (4) in the hollow spiral ridge (3) slides in contact with the inner wall of the hollow spiral ridge (3) in the spiral direction, that is, , Which moves in the lengthwise direction and enables smooth expansion and contraction without applying excessive stress to the tube wall (1) of the hose.

In order to obtain such a synthetic resin drainage hose, a strip material made of soft vinyl chloride in a semi-molten state having a certain width is spirally wound on a rotary shaft for molding as is well known while being extruded from a molding nozzle. At times, the pipe wall (1) is formed by superimposing the other half of the succeeding strip on one half of the preceding strip and welding them together. The resin-coated copper wire (4) is also spirally wound so that the resin-coated copper wire (4) is placed on one half, and the resin-coated copper wire (4) is covered by the other half of the strip-shaped material to be wound next and is hollow. It can be manufactured by forming the spiral ridge (3).

At this time, when two resin-coated copper wires (4) are aligned and spirally wound, the resin-coated copper wires (4) and (4) can be used for a hand switch, or two When two pairs of resin-coated copper wires (4), (4), (4) and (4) are aligned and wound as one pair, one pair of copper wires (4) and (4) is used as a hand switch. , The other pair of copper wires (4) (4) can be used for driving the power brush.

As shown in FIG. 4, a large-diameter resin-coated copper wire (4a) for the hand switch and a small-diameter resin-coated copper wire (4b) for the power brush are integrated in the hollow spiral ridge (3). You may decorate the interior.

Since the coating resin layer (6) of the copper wire (4) is formed of an olefinic resin such as polyethylene or polypropylene that is non-adhesive to soft vinyl chloride, it is a strip-shaped material, that is, the hose pipe wall. It does not adhere to the part.

FIG. 5 shows another embodiment of the present invention, wherein the hollow spiral ridge (3) has a cross section in which the ridge (3) is made of a soft vinyl chloride resin made of the same material as the pipe wall (1). It is divided into upper and lower parts by a double-walled corrugated partition wall (9), and the outer bottom surface of the valley portion (9a) of the partition wall (9) is integrally welded (7) to the pipe wall (1).
An olefin such as polyethylene having a diameter larger than that of the resin-coated copper wire (4) is provided in the central space (3c) formed by the facing surfaces of the valley (9a) and the hollow spiral ridge (3). A reinforcing core wire (10) made of a system synthetic resin is installed in a continuous spiral shape, and a pair of the coated copper wires (4) are formed in the space portions (3d) (3d) formed in the mountain portions (9b) (9b). ) (4) is installed in a continuous spiral shape.

In order to obtain such a hose, as shown in FIG. 6, when a strip material made of soft vinyl chloride in a semi-molten state having a constant width is spirally wound around the rotary shaft for molding while being extruded from the molding nozzle. , The hollow spiral ridge (3) is formed by the one-third width portion of the band-shaped material, and the central third
The width portion forms two ridged corrugated partition walls (9), and the remaining one-third width portion and the portion other than the hollow spiral ridge (3) and the corrugated partition wall (9) form the pipe wall (1 ) Is formed, and the strip-shaped material is spirally wound at a pitch of 1/3 width.

At this time, the two coated copper wires (4) and (4) are placed in the aligned state on the tube wall (1) of the one-third width portion and are spirally wound while being placed, The corrugated partition wall (9) is formed by covering the one-third width part of the center part to be wound,
Further, a reinforcing core wire (10) is provided on the valley portion of the corrugated partition wall (9).
Is wound in a spiral shape while being mounted, and the reinforcing core wire (10) is covered with a one-third width portion to be wound next to form a hollow spiral ridge (3). It can be produced by welding and integrating the portions that are polymerized with each other.

FIG. 7 is a modified example of the hose shown in FIG. 5, in which two hollow spiral ridges (3) (3) are formed in the one-third width portion of the semi-molten band material. The resin-coated copper wires (4) and (4) and the reinforcing core wire (10) are installed in the same manner as above while forming the corrugated partition walls (9) and (9) at two places of the center one-third width as It forms a hose.

In this case, the resin-coated copper wires (4) and (4) are spirally wound at a double pitch to form one pair of resin-coated copper wires (4).
(4) can be used for the hand switch, and the other pair of resin-coated copper wires (4) and (4) can be used for the power brush.

Next, FIG. 8 shows that the hose is provided with tensile strength by embedding the reinforcing sheet (11) in the pipe wall (1).

Although such a reinforcing sheet (11) can be arranged in any of the above-mentioned embodiments, for example, as shown in FIG. 9, at the time of manufacturing the hose shown in FIG. A state in which a strip-shaped reinforcing sheet (11) having the same width as that of the strip portion (3) and the resin-coated copper wires (4) and (4) is overlapped on the lower surface of the width portion of two-thirds of the strip-shaped material. It can be obtained by spirally winding.

In this case, the superposed portion of the semi-molten band-shaped material that sandwiches the reinforcing sheet (11) in a sandwich shape is the reinforcing sheet (11).
The tubular wall (1) is made of a soft vinyl chloride resin and is continuous through a large number of small holes such as the weave, and is continuous also in the thickness direction.

As a concrete structure of the reinforcing sheet (11), a number of narrow flat resin yarns having a thickness of about 0.07 to 0.15 mm, such as polyethylene stretched in the length direction, are vertically and horizontally superposed at small intervals. In this state, a split cloth formed by welding the intersecting portions to each other or a stretched film such as a high-density polyethylene film having a similar thickness is formed into a large number of parallel filaments by making fine cracks in the stretching direction. In addition, two or more split films are laminated and welded together at right angles to each other, and further, plain weave is made by using a resin thread of a narrow width (about 2 mm) that is stretched in the length direction and flat. It is possible to use those obtained by welding the intersecting portions of the weft thread and the warp thread to each other.

[Effect of device]

As described above, according to the suction hose for the electric vacuum cleaner of the present invention, the outer circumference of the soft vinyl chloride pipe wall (1) having the inner peripheral surface formed into the flat surface (2) having the same diameter in the longitudinal direction. A hollow spiral ridge (3) made of the same resin as the pipe wall (1) is integrally formed on the surface, and a resin-coated copper wire (4) is provided inside the hollow spiral ridge (3). In the vacuum cleaner hose, both side walls of the hollow spiral ridge (3) are formed in a divergent shape toward the inner end, and the inner ends of the both side ends are integrated with the outer peripheral surface of the pipe wall (1). By connecting to the pipe wall between both inner ends (1)
Is formed on the flexible wall portion (5) that is bendable toward the inside longer than the diameter of the resin-coated copper wire (4), while the coating layer of the copper wire (4) is made of the soft material. The pipe wall (1) made of vinyl chloride is formed of an olefinic synthetic resin such as polyethylene which is non-adhesive, and the resin-coated copper wire (4) is adhered to the hollow spiral ridge (3). Since it is the interior of the hollow spiral ridge (3),
Since the inner peripheral surface of the tube wall of the hose is formed as a flat surface (2) having substantially the same diameter over the entire length, it is of course possible to reduce the flow resistance of the air to enable a smooth suction action, and of course, the hollow surface. The resin-coated copper wire (4) embedded in the spiral ridge (3) is separated from the tube wall (1) and the hollow spiral ridge (3) without being integrally welded, and the hollow spiral ridge is formed. The length of the pipe wall (1) between the connections in which both side walls of the part (3) are formed in a divergent shape toward the inner end and the inner ends of both side walls of the hollow spiral ridge (3) are connected. Since the salient portion is formed on the flexible pipe wall portion (5) having a diameter larger than that of the resin-coated copper wire (4), when the hose is bent, the flexibility inside the hose that receives a compressive force is exerted. The pipe wall part (5) can be curved and deformed in a wavy shape toward the inside of the hose away from the resin-coated copper wire (4), and this deformation causes compressive stress. In addition to being able to absorb a large amount, the resin-coated copper wire (4) and the hollow spiral ridge (3) are separated from each other, so that extremely good flexibility and extensibility in the length direction can be exhibited. In addition, the bent portion bends with almost no deformation into a flat shape, and the air permeability in the bent portion is improved.

Furthermore, it is possible to prevent the bending stress of the resin-coated copper wire (4) from being transmitted to the pipe wall (1) and prevent the pipe wall (1) from being damaged.

Moreover, since the resin coating layer (6) of the copper wire (4) embedded in the hollow spiral ridge (3) is made of an olefinic synthetic resin such as polyethylene, it is rich in heat resistance and elasticity, and is accidentally stepped on. Even if it is deformed into a flat shape, it can be immediately elastically restored to a circular shape and the copper wire (4) is not buckled, and is deformed and restored integrally with the resin coating layer (6) for long-term use. Is something that can be done.

In addition, the inside of the hollow spiral ridge (3) is divided into upper and lower parts by a corrugated partition wall (9) made of a soft vinyl chloride resin and having a bimodal cross section, and the valley (9a) and the hollow spiral ridge (3) are divided. ) A reinforcing core wire (10) made of an olefin synthetic resin such as polyethylene having a diameter larger than that of the resin-coated copper wire (4) is continuously spirally provided inside a central space (3c) formed by the surface facing the In addition, if the pair of coated copper wires (4) and (4) are continuously spirally installed inside the space portions (3d) and (3d) formed in the mountain portions (9b) and (9b), the reinforcing core wire ( By 10), more excellent pressure resistance and resilience can be exhibited, and a pair of coated copper wires (4) in the space parts (3d) (3d) on both sides.
(4) can be used for convenience as a hand switch or for driving a hand switch and a power brush, and, in addition, a narrow flat resin thread stretched in the length direction is lengthwise and crosswise in the pipe wall (1). Reinforcement sheet (1
By embedding 1), damage due to excessive tension can be prevented.

BRIEF DESCRIPTION OF THE DRAWINGS The drawings show an embodiment of the present invention. FIG. 1 is a simplified side view in which a part of Example 1 is sectioned, FIG. 2 is a partially enlarged sectional view thereof, and FIG. An enlarged cross-sectional view of a bent portion, FIG. 4 is a partially longitudinal simplified side view showing a modified example, FIG. 5 is a simplified side view partially sectioning Example 2, and FIG. 6 is for explaining a manufacturing method thereof. FIG. 7 is a vertical side view for explaining another manufacturing method, FIG. 8 is a simplified side view in which a part of Example 3 is partially sectioned, and FIG. 9 is an example of the manufacturing method. It is a vertical side view. (1) ... tube wall, (2) ... flat surface, (3) ... hollow spiral ridge, (4) ... coated copper wire, (5) ... flexible tube wall, (6) ) ... Resin coating layer, (9) ... Corrugated partition wall,
(9a) ... valley, (9b) ... mountain, (10) ... reinforcing core wire, (11) ... reinforcing sheet.

Claims (3)

[Scope of utility model registration request] 1. An outer peripheral surface of a soft vinyl chloride pipe wall (1) having an inner peripheral surface formed into a flat surface (2) having the same diameter in the lengthwise direction and made of the same resin as the pipe wall (1). A hollow hose for a vacuum cleaner in which a hollow spiral ridge (3) is integrally formed, and a resin-coated copper wire (4) is provided inside the hollow spiral ridge (3). By forming both side walls of the portion (3) toward the inner end in a flared shape and integrally connecting the inner ends of the both side ends to the outer peripheral surface of the pipe wall (1), a pipe between both inner ends is formed. The length of the wall (1) is formed into a flexible wall portion (5) which is bendable toward the inside and is longer than the diameter of the resin-coated copper wire (4), while the copper wire (4) is coated. The layer is formed of an olefinic synthetic resin such as polyethylene which is non-adhesive to the pipe wall (1) made of the above soft vinyl chloride, and the resin-coated copper wire (4) Vacuum cleaner hose, characterized in that formed by interior to the hollow spiral ridge (3) without being bonded to the helical ridge (3). 2. A hollow spiral ridge (3) is divided into upper and lower parts by a corrugated partition wall (9) made of a soft vinyl chloride resin and having a bimodal cross section, and the valley part (9a) of the partition wall (9) is divided. The outer bottom surface of the resin is integrally welded to the pipe wall (1), and the resin coating is applied inside the hollow space (3c) formed by the facing surfaces of the valley (9a) and the hollow spiral ridge (3). A reinforcing core wire (10) made of an olefinic synthetic resin such as polyethylene having a diameter larger than that of the copper wire (4) is continuously spirally mounted, and the mountain portions (9b) (9
The suction hose for a vacuum cleaner according to claim 1, wherein a pair of the coated copper wires (4) and (4) are continuously spirally provided inside the space portions (3d) and (3d) formed in b). 3. A reinforcing sheet (11) is embedded in the pipe wall (1) by vertically and horizontally combining and integrating thin flat resin yarns stretched in the longitudinal direction. Hose for vacuum cleaner.