JP3757823B2 - Cleaner hose - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cleaner hose mainly used by being attached to a vacuum cleaner.
[0002]
[Prior art]
In the cleaner hose, since it can be exhibited by the synthetic resin material forming the hose body in order to have flexibility, the shape retention is maintained by the conductive wire provided on the inner surface of the convex portion of the cleaner hose. Conventionally, a plurality of the conductive wires are arranged at the same pitch, and a hard steel wire is used for all of the conductive wires, and a current necessary for supplying power to an accessory device such as a rotating brush is supplied. In other words, a signal current required to turn on and off the main body of the cleaner is supplied.
[0003]
[Problems to be solved by the invention]
Recent vacuum cleaners are required to be light in weight so as to be advantageous in terms of handling. However, although the above hard steel wire is advantageous in improving the shape retention of the cleaner hose, it not only has a heavy weight per unit area, but also has a large resistance value per unit area, so it supplies power to the attached equipment. In order to use it as a conductive wire through which a large current flows, the diameter becomes thicker and the weight increases.
In addition, in a compact AC / DC vacuum cleaner that can be driven not only by a commercial AC voltage but also by a low DC voltage such as a battery, the supply voltage supplied when the battery is driven by a low DC voltage such as a battery Since it is lower than the AC voltage, a hard steel wire having a large resistance value per unit area cannot transmit a sufficient driving current, and the rotating brush (attached device) cannot be driven sufficiently. In other words, the rotational speed when the rotating brush is driven by a low DC voltage such as a battery is less than the rotational speed when it is driven by a commercial AC voltage. It was. In addition, the said inconvenience becomes remarkable, so that the number of the said hard steel wires increases.
In addition, since the hose body is formed of a soft synthetic resin, the outer surface of the hose body is quickly worn away by contact with the floor surface, and troubles such as the exposed conductive wires occur.
[0004]
In view of the above-mentioned situation, the present invention intends to solve the problem that weight reduction can be achieved while ensuring flexibility and shape retention, and an accessory device is sufficiently driven by a DC voltage. The point is to provide a durable cleaner hose that can be used.
[0005]
[Means for Solving the Problems]
The cleaner hose of the present invention is made of a styrene-based elastomer or an olefin-based elastomer in which a convex portion and a concave portion are formed in a spiral shape alternately positioned in the tube axis direction and have softness in order to solve the above-described problem. the convex inner surface of the formed hose body, the several multiple of copper wire insulated covered by cover member accommodates fixed in a state of overlapping pipe axis direction, combining with the hard on the outer surface of the convex portion A belt-shaped body made of resin is fixed, the covering body is made of a synthetic resin having rigidity, and the width of the belt-shaped body in the tube axis direction is substantially equal to the width of the convex portion of the hose body in the tube axis direction. The synthetic resin having a hardness of 50 to 70 in the spring hardness test A type defined in JIS K6301 is used as the synthetic resin having the softness, and the synthetic resin having the hardness is set in JIS K7202. It is characterized by using a synthetic resin having a hardness of 80 to 100 in the constant to Rockwell hardness test.
The inventor of the present application is a copper wire having a smaller weight per unit area than a hard steel wire, and a resistance value per unit area smaller than that of a hard steel wire. By using the wire, not only can the weight be reduced, but also when the accessory device is driven by a DC voltage such as a battery, a sufficient driving force can be exerted by the copper wire. Since the copper wire has a small (low) shape retention, the shape retention is increased (high) with a cover made of a hard synthetic resin, and the copper wire coated with the cover is convex. The shape retention performance can be improved by providing it in the part or by providing a plurality of copper wires in the same convex part. In addition, although the increase in weight will be caused as the number of copper wires increases, the shape retention performance can be improved. In addition, by fixing the belt-shaped body made of a synthetic resin having rigidity to the outer surface of the convex portion, the soft convex portion is sandwiched between the two wires and the belt-shaped body inside and outside the hose body, and the convex Not only can the shape retention performance in the section be dramatically improved, but also the band-like body is a hard synthetic resin, so that early breakage due to contact with the floor surface can be avoided. Large power can be supplied by the copper wire. Also, by forming the hose body with dechlorinated synthetic resin, that is, styrene elastomer or olefin elastomer, it has flexibility close to, for example, vinyl chloride resin (PVC), lighter than PVC, and discarded. There is no generation of toxic gas when burning.
In addition, by setting the width in the tube axis direction of the belt-like body to approximately half the width in the tube axis direction of the convex portion of the hose body, contact with the floor is achieved while reducing the weight of the entire hose. It can be reliably performed with a band-like body.
In addition, a synthetic resin having a hardness of 50 to 70 in the spring hardness test A type defined in JIS K6301 is used as the soft synthetic resin, and a Rockwell hardness defined in JIS K7202 is used as the synthetic resin having the hardness. By using a synthetic resin with a hardness of 80 to 100 in the thickness test, damage such as cracking of the band or covering due to the impact force when the hose is stepped on, while having sufficient flexibility You can get a hose that will not be affected.
[0006]
The tube core direction end portions of the covering body having a circular outer shape covering each of the plurality of copper wires are connected to each other at one end side in the tube radial direction, and the connection side surface is formed into a continuous flat surface, and the connection By fixing the side surface to the inner surface of the convex portion of the hose body, the fixing area between the two copper wires and the inner surface of the convex portion can be increased.
[0007]
The tube core direction end portions of the covering body having a circular outer shape covering each of the two copper wires are connected to each other at one end side in the tube diameter direction, and the connection side surface is formed into a continuous flat surface, and the connection By fixing the surface opposite to the side surface to the inner surface of the convex portion of the hose body, the flow of wind is smoother than that of the hose inner surface side having a step between the copper wires.
[0008]
Compared to the case where two copper wires are provided by storing and fixing the two copper wires to each of the two convex portions adjacent to each other in the tube axis direction to provide four copper wires. The shape retention performance of the main body can be improved, and it can be used for power supply to other attached devices.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows a flexible cleaner hose B having a circular cross section (may be any shape such as an ellipse or a rectangle) connected to the front side of the cleaner body A. As shown in FIG. 2, this cleaner hose B has two cores of a two-core insulated wire 2 formed by integrating two copper stranded wires 1 having a circular outer shape. The strips 4 and 5 are respectively fixed to the outer surfaces of the two convex portions 3A and 3A adjacent in the tube axis direction. An extension pipe D provided with a grip operation part C is connected to the tip of the telescopic cleaner hose B, and a suction body E is connected to the tip of the extension pipe D. The cleaner hose B can be used by being attached to a large vacuum cleaner such as a dust collector in addition to a handy type (portable) or a normal electric vacuum cleaner.
[0012]
The hose body 3 is preferably made of a synthetic resin having a hardness of 50 to 70 in a spring hardness test A type defined by JIS K6301. Further, as shown in FIG. 2 (b), it protrudes in a substantially trapezoidal shape (may be a mountain shape, an arc shape, or a rectangular shape) on the outer side in the radial direction of the tube, and the outer surface of the top portion is formed substantially flat. Two convex portions 3A are formed with a predetermined pitch in the tube axis direction, and a concave portion 3B is formed between these convex portions 3A, 3A on the inner side in the radial direction of the tube. It may be arcuate or trapezoidal). The two-core insulated wire 2 is bonded and fixed to each of the inner surfaces of the two convex portions 3A and 3A adjacent to each other in the tube axis direction with an adhesive (may be heat-sealed). Accordingly, the portion where the two-core insulated wire 2 is not bonded, that is, the concave portion 3B is a portion having flexibility. By forming the outer surface (top surface) 3G of the convex portion 3A to be flat, there is an advantage that the band-like bodies 4 and 5 can be fixed smoothly and surely, but they need not be flat.
[0013]
As shown in FIG. 2 (b), each of the two-core insulated wires 2 has two end portions in the tube axis direction of the two coating materials 1B and 1B via the connecting portion 7, that is, two cores. The insulated wire 2 is connected on the inner surface side of the convex portion 3A so that the cross-sectional shape is substantially a spectacle shape, and the connecting side surface 7A is formed in a continuous flat surface, and the connecting side surface 7A is formed on the convex surface of the hose body 3. By fixing to the inner surface of the portion 3A, the fixing area between the two copper wires 1, 1 and the inner surface of the convex portion 3A can be increased, and troubles such as peeling can be avoided. The covering materials 1B, 1B and the connecting portion 7 are made of a synthetic resin having a hard property, and are damaged such as cracks entering the covering materials 1B, 1B and the connecting portion 7 due to an impact force when the hose is stepped on. In order to prevent this, it is preferable to use a synthetic resin such as polypropylene or polyethylene having a hardness of 80 to 100 in the Rockwell hardness test specified by JIS K7202.
[0014]
Each copper stranded wire 1 is configured by coating a stranded wire 1A formed by twisting 18 copper wires having a diameter (thickness) of approximately 0.18 with a covering material 1B made of a synthetic resin. The size of the diameter and the number of strands can be freely changed. And, as described above, one of the two core insulated wires 2 in which the two copper stranded wires 1 and 1 are integrated is used to form the suction body E of the vacuum cleaner. A current necessary for supplying power to an accessory device such as a motor for a rotating brush (not shown) provided in the interior is supplied, and the main body of the vacuum cleaner using the remaining two-core insulated wire 2 A signal current necessary for turning A on and off is supplied. When the cleaner body A is turned on and off, the switch 6 provided in the grip operation unit C is pushed as shown in FIG. In addition, the power supply to the accessory device is automatically performed simultaneously with the start of the power supply to the cleaner body A, and a switch (not shown) other than the switch 6 is turned on. It may be made possible to turn it off. Here, although the copper stranded wire 1 is used, it is comprised and comprised from the (single) copper wire which consists of a single wire whose diameter is 0.8 mm (a diameter can be changed freely according to a use form). You can also
[0015]
In FIG. 2 (b), the connecting portion 7 is on the inner surface side of the convex portion 3A in the tube diameter direction, but as shown in FIG. 3, the surface on the opposite side to the connecting side surface 7A is the inner surface of the convex portion 3A of the hose body 3. As shown in FIG. 2 (b) or FIG. 5, the air flow may be made smoother than the case where there is a step between the copper stranded wires 1 and 1 on the inner surface side of the hose. . Also, in FIG. 4, the two-core insulated wire 2 has two copper stranded wires 1A and 1A, and both end surfaces 8A and 8B in the radial direction for covering these copper stranded wires 1A and 1A are flat in cross section. By comprising the covering material 8 in the shape, there is an advantage that not only the adhesion area with the inner surface of the convex portion 3A can be increased, but also the flow of wind on the inner surface side of the hose can be made smooth. In FIG. 5, the two copper stranded wires 1 and 1 can be accommodated in the same convex portion 3A without integrating the two copper stranded wires 1 and 1. In this case, since the four copper stranded wires 1, 1, 1, 1 are wound around the respective rotating drums, when the outer diameters of the rotating drums are the same, the two copper stranded wires 1, 1 Since the winding length can be increased as compared with the case where two of the two-core insulated wires 2 in which the wire is integrated is wound around two rotating drums, it is necessary to extend (longen) until the rotating drum is replaced. Can do. Moreover, in any figure, although the cleaner hose provided with the four copper strands is shown, the cleaner hose provided with the two copper stranded wires may be used. In the drawing, two copper stranded wires are provided in one convex portion 3A. However, one or three or more copper stranded wires may be provided.
[0016]
As shown in FIG. 2A, the strips 4 and 5 have a width L1 in the tube axis direction set to substantially half of a width L2 in the tube axis direction of the convex portion 3A of the hose body 3. Although the entire hose is reduced in weight, the belts 4 and 5 can be reliably contacted with the floor, but the width of the belts 4 and 5 can be freely changed. can do. The strips 4 and 5 are made of a synthetic resin having a hard property so that the strips 4 and 5 are not damaged by receiving an impact force when the hose is stepped on. For this purpose, it is preferable to use a synthetic resin such as polypropylene or polyethylene having a hardness of 80 to 100 in the Rockwell hardness test specified by JIS K7202 as in the case of the covering materials 1B and 1B.
[0017]
A manufacturing method for manufacturing a cleaner hose using the two two-core insulated wires 2 and 2 will be described. The two two-core insulated wires 2 and 2 are attached to a driving rotating body (also referred to as a homer) (not shown). Wind at a predetermined pitch. Next, a belt-shaped synthetic resin tape (not shown) formed in a predetermined width from above the two wound two-core insulated wires 2 and 2 is extruded by an extruder (not shown) and wound. The cleaner hose is continuously formed. The tape is lowered to substantially normal temperature (room temperature) by passing through a water tank (cooling means, not shown) in which cooling water is stored. In addition, before winding the tape around the two-core insulated wires 2 and 2, an adhesive is applied to the surface of the two-core insulated wires 2 and 2 and the lower surface (inner surface) of the tape with a device not shown. However, the two-core insulated wires 2 and 2 and the tape may be fixed by heat melting. When fixing by heat melting, it is preferable that the synthetic resin constituting the covering member for the two-core insulated wires 2 and 2 and the synthetic resin for the tape are of the same type.
[0018]
【The invention's effect】
According to the first aspect of the present invention, the weight per unit area of the conductive wire housed and fixed on the inner surface of the same convex portion of the hose body is smaller than that of the hard steel wire, and the resistance value per unit area is the same as that of the hard steel wire. By using a smaller copper wire, it is possible not only to reduce the weight, but also when the accessory device is driven by a DC voltage such as a battery, a sufficient driving force can be exerted by the copper wire. . Then, the copper wire for shape retention is small (low), increasing the shape retaining property at coating body made of a synthetic resin having a hard property (high) double several coated at their jacket while the The shape retention performance can be improved by providing the copper wire in the same convex portion. In addition, by fixing the belt-shaped body made of a synthetic resin having rigidity to the outer surface of the convex portion, the soft convex portion is sandwiched between the two wires and the belt-shaped body inside and outside the hose body, and the convex Not only can the shape retention performance in the section be dramatically improved, but also the band-like body is a hard synthetic resin, so that early breakage due to contact with the floor surface can be avoided. Accordingly, it is possible to provide a convenient cleaner hose that has flexibility but also has shape retention, and can sufficiently drive the accessory device even with a battery or the like. Also, by forming the hose body with dechlorinated synthetic resin, that is, styrene elastomer or olefin elastomer, it has flexibility close to, for example, vinyl chloride resin (PVC), lighter than PVC, and discarded. When it burns, no toxic gas is generated and it is advantageous for environmental problems.
In addition, by setting the width of the belt-shaped body in the tube axis direction to approximately half of the width of the convex portion of the hose body in the tube axis direction, contact with the floor can be achieved while reducing the overall weight of the hose. This can be performed reliably on the body, and is advantageous in terms of use and durability.
In addition, as a synthetic resin having flexibility, a synthetic resin having a hardness of 50 to 70 is used in the spring hardness test A type defined by JIS K6301, and as a synthetic resin having the above hardness, Rockwell hardness defined by JIS K7202 By using a synthetic resin with a hardness of 80 to 100 in the test, the belt-like body and the covering body are damaged due to the impact force when the hose is stepped on, while having sufficient flexibility. A highly reliable hose that does not receive can be obtained.
[0019]
According to the invention of claim 2, the flat portions in which the ends in the tube axis direction of the covering body having a circular outer shape covering each of the plurality of copper wires are connected at one end side in the tube diameter direction and the connecting side surface is continuous. It is possible to increase the fixing area between the two copper wires and the inner surface of the convex part by fixing the connecting side surface to the inner surface of the convex part of the hose body. Can be avoided reliably.
[0020]
According to the invention of claim 3, the tube core direction end portions of the covering body having a circular outer shape covering each of the two copper wires are connected at one end side in the tube diameter direction, and the connecting side surface is continuous. By forming a flat surface and fixing the surface on the opposite side of the connection side surface to the inner surface of the convex part of the hose body, the flow of wind is smoother than that with a step between copper wires on the inner surface side of the hose. The suction efficiency can be increased.
[0021]
According to the fourth aspect of the present invention, two copper wires are accommodated and fixed to each of two convex portions adjacent to each other in the tube axis direction so that the four copper wires are provided. The shape retention performance of the hose body can be improved as compared with the provided one, and it can be used for power supply to other attached devices and can be used conveniently.
[Brief description of the drawings]
FIG. 1 is a schematic side view of a vacuum cleaner.
2A and 2B show a cleaner hose, in which FIG. 2A is a side view thereof, and FIG. 2B is an enlarged cross-sectional view of an essential part thereof.
FIG. 3 is an enlarged cross-sectional view of a main part of another cleaner hose.
FIG. 4 is an enlarged cross-sectional view of a main part of another cleaner hose.
FIG. 5 is an enlarged cross-sectional view of a main part of another cleaner hose.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Copper stranded wire 1A Stranded wire 1B Coating | covering material 2 2-core insulated wire 3 Hose main body 3A Convex part 3B Concave 3G Outer surface 4,5 Strip | belt body 6 Switch 7 Connection part 7A Connection side surface 8 Coating | covering material 8A, 8B End surface A Vacuum cleaner main body B Cleaner hose C Grip operation part D Extension pipe E Suction body

Claims (4)

On the inner surface of the convex portion of the hose body formed of a styrene-based elastomer or olefin-based elastomer having a convex shape and a concave portion that are alternately arranged in the axial direction of the tube and having a soft property, the several double insulation coated copper wire housed fixed in a state of overlapping pipe axis direction, fixing a strip made of a synthetic resin having a hard property to the outer surface of the convex portion, the hard the coating material As the synthetic resin having softness, the width in the tube axis direction of the belt-like body is set to approximately half the width in the tube axis direction of the convex portion of the hose body. Using a synthetic resin having a hardness of 50 to 70 in the spring hardness test A type specified by K6301 and having a hardness of 80 to 100 in the Rockwell hardness test specified by JIS K7202 as the above-described synthetic resin. Cleaner hose, characterized by using a synthetic resin.   The tube core direction end portions of the covering body having a circular outer shape covering each of the plurality of copper wires are connected to each other at one end side in the tube radial direction, and the connection side surface is formed into a continuous flat surface, and the connection The cleaner hose according to claim 1, wherein a side surface is fixed to an inner surface of a convex portion of the hose body.   The tube core direction end portions of the covering body having a circular outer shape covering each of the plurality of copper wires are connected to each other at one end side in the tube radial direction, and the connection side surface is formed into a continuous flat surface, and the connection The cleaner hose according to claim 1, wherein a surface opposite to the side surface is fixed to the inner surface of the convex portion of the hose body.   The cleaner hose according to claim 1, wherein the two copper wires are housed and fixed to each of the two convex portions adjacent to each other in the tube axis direction to provide four copper wires.

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