JP2019000341A - Hose for vacuum cleaner - Google Patents

Abstract

To suppress generation of adhesion noise while obtaining a light operation feeling concerning a hose for a vacuum cleaner having pleat parts.SOLUTION: A spiral reinforcement body 13 for energizing a hose in a contracting direction is integrated with a hose wall made of a synthetic resin in a hose 1 for a vacuum cleaner. The hose wall includes spiral outer peripheral parts 11, 11 and spiral pleat parts 12, 12. The outer peripheral parts 11, 11 are positioned in the outer periphery of the hose and extending in a direction along a center axis m of the hose. The pleat parts 12, 12 are arranged over the outer peripheral parts 11, 11 and formed to be recessed into an inner side of the hose. The outer peripheral parts 11 are formed by a resin harder than that of the pleat parts 12. The outer peripheral parts 11, 11 are arranged by projection from shoulder parts 12S, 12S of the pleat parts in a direction along the center axis of the hose. In a state where the hose is in a most contracted state, both of side edges 11e, 11e of the outer peripheral parts are brought into contact with each other, but both of the shoulder parts 12S, 12S of the pleat parts are not brought into contact with each other.SELECTED DRAWING: Figure 1

Description

The present invention relates to a hose for an electric vacuum cleaner in which a reinforcing body is spirally integrated with a hose wall. In particular, the present invention relates to a vacuum cleaner hose in which a helix wall is provided on a hose wall so as to be recessed inside the hose.

In a vacuum cleaner using a flexible hose, a hose for a vacuum cleaner in which a reinforcing body is integrated in a spiral shape and a spiral hook part recessed in the inside of the hose is provided on the hose wall is used. Yes. When the collar portion is provided on the hose wall, the hose wall is rich in flexibility and stretchability is enhanced. For example, Patent Document 1 discloses a technique of a hose provided with a coil spring (spiral reinforcement) that can maintain a hose body in a contracted state. According to the technique, it is disclosed that an operating force in the extending direction can be reduced by using a part of the plurality of coil springs as a push spring and another spring as a tension spring.

Further, Patent Document 2 relates to a vacuum cleaner hose in which a spiral hook portion recessed into the inside of the hose is provided on the hose wall, and at both ends of the hose, the hose reinforcements are in close contact with each other. At the center of the hose, a vacuum cleaner hose is disclosed in which the hose wall is in an extended state. According to such a technique, local damage to the hose body is suppressed. Is done.

JP 2004-69031 A Japanese Patent No. 3134094

As in the techniques of Patent Document 1 and Patent Document 2, when a spiral collar is provided on the hose wall of the vacuum cleaner, the collar is formed of a flexible soft resin. Increase flexibility and stretchability.

However, in the vacuum cleaner hose in which the hose reinforcements are in close contact with each other as in the techniques of Patent Document 1 and Patent Document 2, when the hose contracts, the soft resin in the buttocks Will be in close contact. Due to this close contact, it has been found that the operation of extending the hose feels heavy, or that a sticking sound due to the close contact of the soft resin is generated with the operation of the hose.

The objective of this invention is suppressing generation | occurrence | production of an adhesive sound, making the operation feeling in the hose for vacuum cleaners which has a collar part light.

As a result of intensive studies, the inventor formed the outer peripheral portion located on the outer periphery of the hose with a resin harder than the flange portion, and provided the outer peripheral portion so as to protrude in the direction along the central axis rather than the flange portion. The inventors have found that the above object can be achieved and have completed the present invention.

The present invention relates to a vacuum cleaner hose in which a helix wall made of a synthetic resin is integrated with a helical reinforcing body that urges the hose in a contracting direction, and the hose wall is located on an outer periphery of the hose. Spiral outer periphery extending in a direction along the central axis of the inner surface of the hose, and a spiral flange that is provided so as to straddle the outer periphery adjacent to each other and recessed in a hook shape inside the hose. The outer peripheral portion is formed of a resin harder than the flange portion, and the outer peripheral portion projects in a direction along the central axis of the hose from the shoulder portion of the flange portion. In the state where the hose is most contracted, the side edges of the outer peripheral portion are in contact with each other, and the shoulder portions of the buttocks are not in contact with each other (first invention).

Here, the shoulder portion of the buttocks is a part of the buttocks that is located in the vicinity of the portion where the buttocks and the outer periphery are joined, and is not joined to the outer periphery. is there.

In the first invention, preferably, the side edge surfaces of the outer peripheral portion are formed in a straight line when viewed in cross section, and the adjacent side edge surfaces are substantially parallel to each other (second invention). In the first invention or the second invention, preferably, the outer peripheral portion has a surface inclined so as to face the outside of the hose at one side edge, while facing the inside of the hose at the other side edge. It has an inclined surface (third invention). In the first to third inventions, the resin forming the side edge of the outer peripheral portion preferably contains a lubricating component (fourth invention).

According to the vacuum cleaner hose of the present invention (first invention), the operational feeling of the vacuum cleaner hose becomes light and the generation of adhesive sound is suppressed. In addition, according to the second aspect of the present invention, it is possible to suppress the generation of sound that makes contact between the outer peripheral portions.
Further, according to the third invention, the disturbance generated in the hose during contraction is reduced.
Moreover, according to the 4th invention, the operation feeling of a hose becomes lighter.

It is a partial cross section figure which shows the structure of the hose for vacuum cleaners of 1st Embodiment. It is a schematic diagram which shows the manufacturing process of a hose. It is a partial cross section figure which shows the structure of the hose for vacuum cleaners of 2nd Embodiment. It is a partial cross section figure which shows the structure of the hose for vacuum cleaners of 3rd Embodiment. It is a schematic diagram which shows the structure of a vacuum cleaner.

Hereinafter, embodiments of the present invention will be described with reference to the drawings, taking a hose for a household vacuum cleaner as an example. The invention is not limited to the individual embodiments shown below, and can be carried out by changing the form.

FIG. 5 shows the overall appearance of the vacuum cleaner. The vacuum cleaner hose 1 is connected to an intake port of the vacuum cleaner main body 99 via a connection member (mouth member) 95 and one end of the vacuum cleaner hose 1. The other end of the vacuum cleaner hose 1 is connected to the hand operation unit 98, and the extension tube 97 and then the floor nozzle 96 are connected to the hand operation unit 98 to form a vacuum cleaner. ing. Typically, the connection member 95 and the vacuum cleaner hose 1 are an integrated hose assembly, and the connection member 95 and the vacuum cleaner main body 99 can be easily connected / disconnected. .

A vacuum cleaner hose 1 according to a first embodiment is shown in FIG. In FIG. 1, the upper half of the center line is shown in a sectional view, and the lower half is shown in an external view. The same applies to FIGS. 3 and 4. The vacuum cleaner hose 1 is a vacuum cleaner hose in which spiral reinforcing bodies 13 and 13 are integrated with a synthetic resin hose wall. The helical reinforcements 13 and 13 urge the hose in the contraction direction so that the hose maintains the contracted state. In the present embodiment, the two helical reinforcement bodies 13 and 13 are joined and integrated into the inner peripheral surface of the hose wall in two spirals, but even if there is only one helical reinforcement body. It may be three or more.

The helical reinforcing body 13 urges the hose in the contracting direction like a tension spring. The spiral reinforcing body 13 is configured by, for example, covering a metal wire with a synthetic resin. The metal wire is preferably a steel wire, piano wire, iron wire or the like. As the synthetic resin constituting the coating, a synthetic resin that can satisfy the airtightness and insulation required for the coating can be used. Further, it is preferable that the coating resin is a resin that can be bonded to the resin that forms the hose wall, in particular, a weldable resin. Further, the entire helical reinforcement body may be formed of a hard synthetic resin, and the helical reinforcement body may be hollow.
In the present embodiment, resin-coated metal wires in which a piano wire is coated with a hard vinyl chloride resin are used as the spiral reinforcing bodies 13 and 13.

The hose wall of the vacuum cleaner hose 1 will be described. The hose wall has spiral outer peripheries 11 and 11 and spiral flanges 12 and 12. In the present embodiment, the outer peripheral portion and the flange portion are each provided in two spirals, and the outer peripheral portion 11 and the flange portion 12 are alternately arranged in the length direction of the hose. .

The outer peripheral portion 11 is located on the outer periphery of the hose and extends substantially along the direction in which the central axis m of the hose extends. That is, in the cross section along the central axis of the hose, the outer peripheral portion 11 has an elongated cross section in the direction of the central axis of the hose. Typically, the outer peripheral portion 11 has a form in which a thin strip-like strip having a predetermined width is spirally wound. When the hose contracts, adjacent side edges of the outer peripheral portions 11 and 11 come into contact with each other, and further contraction of the hose is restricted.

In this embodiment, when the hose is contracted, the surfaces of the side edges 11e and 11e of the outer peripheral portion 11 are along the central axis of the hose so that the adjacent side edges 11e and 11e come into contact with each other when they come into contact with each other. When viewed in cross section, they are formed in a straight line, and the abutting surfaces are provided substantially in parallel.

The collar part 12 is a part formed so as to be recessed in a hook shape inside the hose. Mainly, the flange portion 12 contributes to the flexibility and stretchability of the hose wall. The flange portion 12 is provided so as to straddle the outer peripheral portions 11 and 11 adjacent to each other. The flange portions 12 and 12 are the outermost peripheral portion of the flange, and are joined to the inner peripheral surface of the outer peripheral portions 11 and 11, while the other portions are not joined to the outer peripheral portion and are freely deformed. Is allowed.

The outer peripheral portions 11 and 11 are made of a resin that is harder than the flange portions 12 and 12. The difference in hardness between the two is, for example, 10 degrees or more, more preferably 15 degrees or more. In other words, the flanges 12 and 12 are made of a soft and soft resin, and increase the flexibility of the hose wall. Both are selected to be a combination of resins that can be bonded to each other, for example, resins that can be bonded and welded.

As the synthetic resin constituting the outer peripheral portion 11 of the hose wall, a relatively hard synthetic resin material (for example, polyolefin resin) can be used. Examples of the polyolefin resin include high density polyethylene resin (HDPE) and polypropylene resin. Hard vinyl chloride resin (PVC resin), polyethylene terephthalate resin (PET resin), etc. can also be used as the resin of the outer peripheral portion. A preferable hardness as a resin material constituting the outer peripheral portion 11 is about 70 to 98 (JIS Shore A).

As the synthetic resin that forms the flange portion 12 of the hose wall, a relatively soft synthetic resin material (for example, polyolefin resin) can be used. Examples of the polyolefin resin include low density polyethylene resin (LDPE) and ethylene vinyl acetate copolymer resin (EVA). Soft vinyl chloride resin (PVC resin), thermoplastic elastomer (TPE), urethane resin, rubber or the like can also be used as the resin of the collar portion 12. A preferable hardness as a resin material constituting the flange portion 12 is about 50 to 80 (JIS Shore A).

In this embodiment, the outer peripheral part 11 is comprised by hard vinyl chloride resin, and the collar part 12 is comprised by soft vinyl chloride resin, and both are welded and the hose wall is comprised. In addition, the synthetic resin which comprises a hose wall is colored by a predetermined color as needed.

It is preferable that the resin constituting the outer peripheral portion 11, particularly the resin forming the side edge of the outer peripheral portion 11, contains a lubricating component. Examples of the lubricating component include lubricants such as metal soap and oil that can be blended in the resin, talc, silicone, calcium carbonate, and the like. Although not essential, it is preferable to roughen the surface of the outer peripheral portion 11, particularly the side edge surface of the outer peripheral portion 11.

The outer peripheral part 11 is provided so that the side edges 11e, 11e of the outer peripheral part 11 protrude in a direction along the central axis m of the hose from the shoulder parts 12S, 12S of the flange parts 12, 12. Here, the shoulder portion 12S of the buttocks is a part of the buttocks 12, and is joined to the outer peripheral portion 11 located in the vicinity of the portion where the buttocks 12 and the outer peripheral portion 11 are joined. It is a part without. That is, in the cross section along the hose central axis, the length LO along the hose central axis m of the outer peripheral portion 11 is between the shoulder portions 12S and 12S of the collar portion disposed so as to sandwich the joint portion with the outer peripheral portion. It is longer than the distance LS along the hose central axis m.

In the state in which the hose 1 is most contracted, the side edges 11e and 11e of the outer peripheral portions 11 and 11 are in contact with each other, while the shoulder portions 12S and 12S of the buttocks adjacent to each other across the trough portion 12V are in contact with each other. The outer peripheral part 11 and the collar part 12 are formed so that it may not.

Hereinafter, an example of a method for manufacturing the vacuum cleaner hose 1 according to the embodiment will be described with reference to FIG. The vacuum cleaner hose 1 can be manufactured, for example, by a known manufacturing method called a spiral method. In this method, an indefinite length hose is continuously formed by sequentially supplying and integrating the material of the hose to the hose forming shaft SFT capable of a helical rotational feed movement with a predetermined diameter and pitch. To go.

First, the reinforcement bodies 13 and 13 are prepared by a well-known method with a predetermined diameter and pitch. In order to make the reinforcing bodies 13, 13 into a tension spring shape so that they can be urged in the contraction direction, when the reinforcement body formed into a normal coil spring shape is transferred to the hose forming shaft SFT, the spring is reversed. You can transfer. If the shrinkage force may be small, a reinforcing body wound at a dense pitch may be used as it is.

The prepared reinforcing bodies 13, 13 are supplied in a state of being stretched in the length direction of the hose to the hose forming shaft that performs the rotational feed movement, and are arranged in a spiral shape of two strips. That is, in this manufacturing method, the vacuum cleaner hose 1 is manufactured in an extended state.

The soft resin to be the flanges 12 and 12 is extruded into a predetermined cross section in a semi-molten state to form a strip T12, and the strip T12 is attached to the hose forming shaft SFT so that the strip T12 covers the reinforcing bodies 13 and 13. Feed and spiral. In FIG. 2, the portion of the strip T12 that is recessed radially inward becomes the flanges 12 and 12 when it becomes a hose. The strip T12 and the reinforcing body 13 are bonded or fused. It is preferable that both side edges of the strip T12 are fused to each other and an airtight tube is completed with a soft resin.

The hard resin to be the outer peripheral portions 11 and 11 is extruded into a predetermined cross section in a semi-molten state to form strips T11 and T11. The strips T11 and T11 are located downstream of the position where the strip T12 is wound. However, it supplies to the hose shaping | molding axis | shaft SFT so that the part which does not become a collar part among the strips T12 may be covered, and it is made to wind in a spiral shape. The strips T11, T11 and the strip T12 are bonded or welded at a position where they are in contact with each other.

When the strips T11 and T12 are supplied to the hose forming shaft, it is preferable that cooling is appropriately performed so that the shape is appropriately maintained. Further, the bonding between the reinforcing body 13, the strip T12, and the strip T11 may be adhesion or welding, and in the case of adhesion, an adhesive is appropriately applied to the adhesion portion.

On the downstream side where the strips T11 and T11 are wound and integrated, the hose is cooled with water or air to fix the detailed shape of the hose wall.

When the above processes are performed simultaneously, the completed vacuum cleaner hose 1 is continuously taken out from the end of the hose forming shaft. The removed hose 1 is contracted into a contracted form as shown in FIG. 1 by the contracting force of the reinforcing body biased in the contracting direction. The shrinkage may be performed such that the outer edges 11e and 11e are in close contact with each other without external force acting on the hose 1 depending on the application and specifications of the hose 1, or the outer edges 11e and 11e. Some gaps may remain between the two.

The effect | action and effect of the hose for vacuum cleaners of the said embodiment are demonstrated. According to the vacuum cleaner hose of the first embodiment, the outer peripheral portion 11 is formed of a resin harder than the flange portion 12, and the outer peripheral portion 11 has a side edge 11e of the shoulder portion of the flange portion. 12S is provided so as to project in a direction along the central axis m of the hose, and in a state where the hose 1 is most contracted, the side edges 11e of the outer peripheral portion 11 are in contact with each other, and the shoulders of the flanges 12 adjacent to each other Since the parts 12S are configured so as not to contact each other, the operational feeling of the vacuum cleaner hose becomes light and the generation of adhesive sound is suppressed.

When the collars made of soft resin contact each other, especially when the shoulders of the collars contact each other, the operation to stretch the hose requires a force to tear the collars in contact with each other. Although the feeling tends to be heavy, in the hose of the above embodiment, the shoulders 12S and 12S of the buttock formed of a soft resin by bringing the outer peripheral parts 11 formed of a hard resin into contact with each other when the hose is contracted. Since the contact of the hose is prevented, the feeling of operation of the hose becomes light. Further, since the contact of the shoulder portions 12S, 12S of the collar portion formed of a soft resin is prevented, the generation of adhesive sound that is likely to occur when the collar portion abuts and separates during expansion and contraction of the hose is suppressed.

Further, as in the above embodiment, the surface of the side edge 11e of the outer peripheral portion 11 is formed in a straight line when viewed in cross section, and the surfaces of the adjacent side edges 11e, 11e are substantially parallel to each other. When the hose is contracted, the outer peripheral portions of the hose that come into contact with each other are easily brought into surface contact with each other. Occurrence can also be suppressed.

Further, as in the above-described embodiment, when the resin constituting the side edge portion 11e of the outer peripheral portion 11 includes a lubricating component, the operational feeling of the hose becomes lighter.
In addition, although it is not essential from a viewpoint of making the operation feeling of a hose lighter, the resin which comprises the collar part 12 may also contain a lubrication component.

The invention is not limited to the embodiment described above, and can be implemented with various modifications. Although other embodiments of the invention will be described below, in the following description, portions different from the above-described embodiment will be mainly described, and detailed descriptions of the same portions will be omitted. Moreover, these embodiments can be implemented by combining some of them or replacing some of them.

In FIG. 3, the hose 2 for vacuum cleaners of 2nd Embodiment is shown. Compared with the first embodiment, the present embodiment is different from the first embodiment in that the spiral reinforcing bodies 23 and 23 and the flange portions 22 and 22 are integrated with the outer peripheral portions 21 and 21. In the present embodiment, the spiral reinforcing bodies 23, 23 are integrated with the inner peripheral surfaces of the outer peripheral portions 21, 21. Moreover, the both ends of the collar part 22 are joined to the inner peripheral surface of the adjacent outer peripheral part, and the collar parts adjacent to each other are not directly joined.

Even in the vacuum cleaner hose 2 having such a configuration, the outer peripheral portions 21 and 21 are made of a resin harder than the flange portions 22 and 22 as in the vacuum cleaner hose 1 of the first embodiment. And if the outer peripheral part 21 is provided so that the side edge may protrude from the shoulder part 22S of the collar part 22 in the direction along the central axis m of a hose, the operational feeling of the hose for vacuum cleaners Becomes light, and the generation of adhesive sound is suppressed.

Furthermore, in the vacuum cleaner hose 2 of the second embodiment, the outer peripheral portions 21 and 21 have a surface inclined so as to face the outside of the hose at one side edge E1, while at the other side edge E2 It is formed to have an inclined surface facing the inside of the hose. When the side edge of the outer peripheral portion is formed in this manner, when the hose contracts, the inclined surface on the other side edge E2 side enters the inside of the inclined surface on the one side edge E1 side. A meshing effect occurs. Due to such an effect, when the hose contracts, the outer peripheral portions 21 and 21 adjacent to each other are neatly aligned, and the disturbance generated in the hose during contraction is reduced.

In the description of the first embodiment, the shape of the outer peripheral portion of the hose has been described by taking an example of a thin plate shape having a rectangular cross section elongated in the central axis direction of the hose, but the specific shape of the outer peripheral portion is as follows. However, the present invention is not limited to this, and the protrusions 21P and 21P may be provided on the outer peripheral portion like the outer peripheral portion 21 of the second embodiment in FIG. Further, the outer peripheral portion may be formed in a mountain shape so that the central portion of the outer peripheral surface protrudes outward in the radial direction. Moreover, the outer peripheral part may be formed in the form which has a ditch | groove so that the center part of an outer peripheral surface may enter radial inside. Moreover, the inner peripheral surface shape of the outer peripheral portion is not particularly limited.

In FIG. 4, the hose 3 for vacuum cleaners of 3rd Embodiment is shown. In the present embodiment, R (R) is rounded around the side edges of the outer peripheral portions 31 and 31 as compared with the first embodiment. Even if the outer peripheral portion has such a configuration, the operational feeling of the vacuum cleaner hose becomes light and the generation of adhesive sound is suppressed as in the first embodiment.

Moreover, in the hose 3 for vacuum cleaners of 3rd Embodiment, the form of the collar parts 32 and 32 is a little different. In the present embodiment, when the hose is contracted, the flange portions 32 and 32 are in the form of a flange that falls in a direction in which the spiral reinforcing bodies 33 and 33 are wound. When the collar parts 32 and 32 are formed in this way, the substantial inner diameter of the hose when the hose contracts is hardly reduced, and deterioration of the ventilation resistance of the hose can be suppressed.

In the description of the above embodiment, the example in which the spiral reinforcing body is bonded or welded to the inside of the outer peripheral portion or the like has been described. However, the spiral reinforcing body may be integrated in another form. . For example, the helical reinforcement may be integrated outside the outer peripheral portion. Further, the helical reinforcing body may be sandwiched between the portions where the outer peripheral portion and the flange portion are welded / bonded. Alternatively, the helical reinforcing body may be embedded in the thickness of the outer peripheral portion.

Moreover, the vacuum cleaner which can apply the hose for vacuum cleaners of the said embodiment is not specifically limited, In addition to a household vacuum cleaner like FIG. 5, it uses for other types of vacuum cleaners. You can also. The hose for a vacuum cleaner of the above embodiment can be a hose that can be expanded and contracted at a relatively high expansion / contraction ratio, and can also be used for a vacuum cleaner that includes a storage and expansion / contraction wand.

The vacuum cleaner hose can be used for, for example, a household vacuum cleaner, has good operability, and has high industrial utility value.

DESCRIPTION OF SYMBOLS 1 Electric vacuum cleaner hose 11 Peripheral part 12 Collar part 12S Collar shoulder part 13 Reinforcement body SFT Hose molding shaft T11 Peripheral part strip T12 Collar strip 2 Hose 21 for vacuum cleaner Peripheral part 22 Collar part 22S Shoulder part 23 Reinforcing body 3 Vacuum cleaner hose 31 Peripheral part 32 Saddle part 32S Shoulder part 33 of reed part Reinforcing body 99 Vacuum cleaner body 98 Hand operating part 95 Connecting member

Claims (4)

A hose for a vacuum cleaner in which a helical reinforcing body for urging the hose in a contracting direction is integrated with a hose wall made of a synthetic resin,
The hose wall is
A helical outer periphery located on the hose outer periphery and extending in a direction along the central axis of the hose;
A spiral hook provided to straddle the outer peripheries adjacent to each other and formed to be recessed in a hook shape inside the hose;
The outer peripheral portion is formed of a resin harder than the flange portion,
The outer peripheral portion is provided so as to protrude in a direction along the central axis of the hose from the shoulder portion of the flange portion,
In the state where the hose is most contracted, the side edges of the outer peripheral portion are in contact with each other, the shoulder portions of the buttocks are not in contact with each other,
Hose for electric vacuum cleaner. The side edge surfaces of the outer peripheral portion are formed in a straight line when viewed in cross section, and the adjacent side edge surfaces are substantially parallel to each other.
The hose for a vacuum cleaner according to claim 1. While the outer peripheral portion has a surface inclined to face the outside of the hose at one side edge,
On the other side edge, it has a surface inclined to face the inside of the hose,
The hose for a vacuum cleaner according to claim 1 or 2. The resin forming the side edge of the outer peripheral portion contains a lubricating component,
The hose for a vacuum cleaner according to any one of claims 1 to 3.

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