JPH078420A - Floor nozzle for electric vacuum cleaner - Google Patents

Abstract

PURPOSE:To enhance a surface ironing property, non-contaminating property, etc., by using a specific material formed by mixing a hydrogenated unsatd. nitrile conjugated diene copolymer, rubber, etc., for a material of a sliding piece disposed on the peripheral surface of an agitator supported in a suction chamber having a suction port in its lower aperture. CONSTITUTION:The agitator 16 of the floor nozzle provided with the suction chamber 12 in its front inside and a turbine chamber 13 in its rear inside, respectively, and is provided with the agitator 16 in the suction chamber 12 in parallel therewith is composed by mounting the sliding contact piece 35 in the longitudinal direction of the outer periphery of a rotor 34. The sliding contact piece 35 is formed by blending three materials i.e., the hydrogenated unsatd. nitrile conjugated diene copolymer, the hydrogenated unsatd. nitrile conjugated diene copolymer finely dispersed with an ethylenic unsatd. carboxylic acid metal salt polymer and middle or high nitrile rubber polymer-blended with 10 to 50% (wt.%) polyvinyl chloride in a ratio of 10 to 50% respectively and vulcanizing the polymer blend formed in such a manner by an org. peroxide vulcanizer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sliding contact piece provided on an agitator used for a floor nozzle for an electric vacuum cleaner.

[0002]

2. Description of the Related Art Conventionally, since the agitator of this kind of floor nozzle is slippery and is particularly required to have abrasion resistance and heat resistance, its material is vulcanized polyurethane as disclosed in JP-A-1-268528. Adopted talc added to rubber, nylon film adhered and coated on it, or finely dispersed hydrogenated unsaturated nitrile conjugated diene copolymer with ethylenically unsaturated carboxylic acid metal salt It had been.

[0003]

However, in the material of the sliding contact piece used for the agitator of the floor nozzle as described above,
Since the elongation is low and it is brittle, cracks occur at the end of the sliding contact piece, and because the friction coefficient is high, slippage with the carpet surface is bad, so if you leave the floor nozzle operating on the carpet, There was a defect in terms of durability and performance such as abrasion or damage to the hair.

Therefore, a nylon film was adhered and coated on the surface of the urethane rubber, but in this case, the surface is hard and slips too much, so that it is difficult to remove lint on the carpet surface, etc. However, the secondary processing for coating the nylon film is required, and many drawbacks such as an increase in cost occur.

As another material for improving strength,
Although chloroprene rubber and the like were examined, in this case, there are various problems such as carbon black filled for rubber reinforcement stains the floor surface black. Therefore, as a countermeasure for this, a finely dispersed ethylenically unsaturated carboxylic acid metal salt was used in a hydrogenated unsaturated nitrile conjugated diene copolymer, but the moldability such as poor releasability was poor, and It had the drawback of being extremely expensive. The present invention has solved the above-mentioned conventional problems, and aims to improve the function of the agitator so that it can always be kept good.

[0006]

In order to achieve such an object, the present invention provides a hydrogenated unsaturated nitrile conjugated diene polymer and a hydrogenated unsaturated nitrile conjugated diene polymer around a rotor. A fine dispersion of an ethylenically unsaturated carboxylic acid metal salt and a rubber obtained by blending polyvinyl chloride in an amount of 10 to 50% (Wt%) with medium-high nitrile rubber, and the above three materials in an amount of 10 to 50% (Wt%), respectively. It is made of a flexible molding material composed of a vulcanized product obtained by blending in a ratio, and then adding fluorine resin, silicone rubber, etc., and vulcanized with an organic peroxide-based vulcanizing agent. The sliding contact piece having a large number of protrusions is provided to form an agitator, and the agitator is provided in the floor nozzle main body together with the drive source.

[0007]

The sliding contact piece of the agitator has a large number of projections formed on at least one surface (one surface on the rotation direction side) of the agitator, and the material thereof is a hydrogenated unsaturated nitrile conjugated polymer and a hydrogenated unsaturated nitrile conjugated polymer. Finely dispersed diethylenically unsaturated metal carboxylate of ethylenic carboxylic acid, and polyvinyl chloride 10-50% in medium-high nitrile rubber
(Wt%) Polymer blended rubber, each of the above three materials is blended in a proportion of 10 to 50% (Wt%), and then fluorine resin, silicone rubber, etc. are added, and an organic peroxide vulcanizing agent is added. Since the vulcanizate obtained by vulcanization is used, it has excellent flexibility and impact resilience, so when it comes into contact with the surface to be cleaned, it fits well on the same surface and its surface is squeezed To do. As a result, dust is effectively released from the surface to be cleaned, and the released dust is effectively sucked into the floor nozzle body by the restoring force of the sliding contact piece and the suction force of the electric vacuum cleaner. At this time, the sliding contact piece has a large number of projections at its tip end, and slides while rotating while being pressed against the surface to be cleaned such as a carpet, but the material used is highly wear resistant and heat resistant. Due to the action of talc, fluorine resin, silicone rubber, etc., which are made of a flexible material and are added as a reinforcing agent and a friction coefficient lowering agent, the dust collection performance is reduced, the life is shortened, and the floor is scratched and abraded. It has excellent performance without dirt.

Further, since the hardness of the sliding contact piece is set to 30 to 90 degrees, when contacting the surface to be cleaned, a napping phenomenon occurs in the optimum state on the surface, and the surface is effectively cleaned. Since it works hard, it has the effect of further improving the dust collection performance on the surface to be cleaned.

Furthermore, since a very small amount of a coloring agent such as carbon black is added to make it lightly gray, the floor surface is not stained black and defects such as burning during molding and defects due to dirt are conspicuous. By making it difficult, it also contributes effectively to the reduction of appearance defects.

[0010]

Embodiments will be described below with reference to the accompanying drawings.

1 to 4, the floor nozzle main body 7 is
The upper and lower body members 9 and 10 are joined together via a bumper 8, and a suction chamber 12 having a lower opening as a suction port 11 is provided in the front inside thereof, and a turbine chamber 13 is provided in the rear inside thereof.
Are formed respectively.

The turbine chamber 13 is separated from the suction chamber 12 by a partition wall 14, and the rear portion having the opening 15 is set in an arc shape. Reference numeral 16 denotes an agitator provided in the suction chamber 12 in parallel with the suction chamber 12, and 17 denotes the suction chamber 1.
2, bearings of agitator 16 provided on both side chamber walls, 1
8 is a fixed brush attached in parallel to the rear of the suction port 11,
Reference numerals 9 and 20 denote wheels provided with suction ports 11 in front of and behind the floor nozzle main body 7 so that the surfaces to be cleaned are located at regular intervals.

Reference numeral 21 denotes a suction joint of a substantially semi-cylindrical shape which is rotatably slidable in the rear of the turbine chamber 13. The suction joint 21 has a cylindrical connection port 22 projecting from a part of its peripheral wall and a ring 23 to a floor. A nozzle pipe 24 is rotatably attached, and an extension pipe communicating with the suction side of the electric vacuum cleaner via a hose is detachably connected to the floor nozzle pipe 24.

Reference numeral 25 denotes a turbine which is arranged in the turbine chamber 13 and whose outer periphery is partially surrounded by a suction joint 21. The shaft body 26 penetrates through a rotary shaft on one side of the suction joint 21 and projects outside the turbine chamber. Are provided integrally.

27 is a belt for power transmission, which is the turbine 2
The rotation of 5 is transmitted to the agitator 16 via the pulley 28. Further, the turbine 25 is the belt 2 of the turbine chamber 13.
7 is arranged so as to be offset to the side where it is arranged. 29 and 30 are two vents formed in the partition wall 14, one vent 29 is opposed to the lower half of the turbine 25, and the other vent 30 is not opposed to the turbine 25 and is directly connected to the suction joint 21. Connection port 2
It is facing 2.

Reference numeral 31 is a switching lever, and a shield plate 32 protruding from a part thereof is provided with an opening 33 which selectively communicates with either one of the vent holes 29 and 30.

In the above structure, when the switching lever 31 is slid to the right in FIG. 2 and the shield plate 32 is communicated with the vent hole 29, the suction port 11 → the suction chamber 12 → the vent port 29 flows. The air collides with the turbine 25 and then flows from the connection port 22 of the suction joint 21 to the floor nozzle pipe 24 to the extension pipe to the hose to reach the vacuum cleaner.

Therefore, the turbine 25 rotates, and its rotational force is transmitted to the agitator 16. By the way, the agitator 16 is configured such that a sliding contact piece 35 is mounted in the longitudinal direction of the outer circumference of the rotor 34.

The sliding piece 35 is a hydrogenated unsaturated nitrile conjugated polymer, a hydrogenated unsaturated nitrile conjugated diene polymer finely dispersed with an ethylenically unsaturated carboxylic acid metal salt, and a medium-high nitrile. Polyvinyl chloride for rubber 1
Rubber blended with 0 to 50% (Wt%) polymer, the above three materials are blended with each other in a proportion of 10 to 50% (Wt%), and then fluorine resin, silicone rubber, etc. are added, and organic peroxide is added. A flexible material made of a vulcanized product obtained by vulcanizing with a system vulcanizing agent is used. Moreover, a large number of protrusions 36 are formed on one surface (side surface in the rotation direction). When the agitator is rotating clockwise as shown in FIG. 5, the sliding contact piece 35 is displaced in the counter-rotational direction when it comes into contact with the surface to be cleaned, and relatively moves to stroke the surface to be cleaned. At this time, the dust is squeezed by the large number of projections 36 and is released from the surface to be cleaned. The free dust is effectively guided into the floor nozzle main body 7 by the repelling action when the sliding contact piece 35 is restored in the diameter direction (due to elasticity and centrifugal force) and the suction force of the electric vacuum cleaner. Here, the sliding contact piece 35 blocks the flow of air from the front when it is in contact with the surface to be cleaned, and promotes that the suction force of the electric vacuum cleaner works intensively and effectively on the surface to be cleaned. . Also, the sliding contact piece 35
Since it has a strip shape, it is possible to prevent tangling of fine dust such as lint.

Thus, the rotor 34 of the agitator 16 is
The sliding contact piece 35 mounted in the longitudinal direction of the outer peripheral surface is a basic component that releases the dust on the surface to be cleaned and gives a repelling action to influence the dust collection performance. When the floor nozzle is used, the agitator rotates at a high speed of 3000 to 4000 rotations, is pressed against the carpet surface, and reciprocates back and forth, which requires durability of 5 years or more. The wear-resistant life of the product must be guaranteed. Therefore, the basic physical properties that can be adopted for sliding contact pieces are: 1. Melt wear resistance is extremely high.

2. It is required to have flexibility and high rebound resilience because it is well adapted to the surface to be cleaned, has a squeezing effect on the surface, and requires repulsion and restoration.

3. There is no damage to the floor surface and no pollution. Etc. are especially required.

A sliding contact piece 35 which can satisfy these required characteristics.
The flexible material of the present invention is used as a molding material for use as a molding material that completely satisfies these conditions.

The hydrogenated unsaturated nitrile conjugated polymer of the present invention, a hydrogenated unsaturated nitrile conjugated diene-based polymer in which an ethylenically unsaturated carboxylic acid metal salt is finely dispersed, and a medium-high nitrile rubber containing polyvinyl chloride 10 ~ 50% (Wt
%) Polymer blended rubber, each of the above three materials is blended at a ratio of 10 to 50% (Wt%), and then fluorine resin, silicone rubber, etc. are added and vulcanized with an organic peroxide vulcanizing agent. A flexible material made of a vulcanized product obtained by the above is used. Therefore, since practical strength can be sufficiently satisfied without using carbon black as a reinforcing agent, there is no fear of black stains on the floor surface at all. However, the sliding contact piece is particularly required to have melt wear resistance, and particularly severe usage conditions are required. Therefore, for the purpose of lowering the friction coefficient and imparting a reinforcing effect, a fluorine resin or silicone rubber is added. As a result, the floor nozzle can withstand a life of 5 years or more, and the sliding contact piece can have a durability of 500 hours or more.

In addition, the floor nozzle is of course required to maintain durability, and the dust removal ability especially on the surface to be cleaned is the most important point. Therefore, the function of the sliding contact piece attached to the rotor surface of the agitator is particularly important.

When the sliding contact piece 35 comes into contact with the surface to be cleaned, the sliding contact piece 35 fits well to the surroundings and exerts a squeezing action on the surface.
High elasticity, high creep characteristics and flexibility are required because it is necessary to release the dust from the surface to be cleaned and suck the released dust into the body of the floor nozzle by the restoring force of the sliding contact piece. . Therefore, the hardness is JIS K 630.
1. According to the A-type measurement by the spring hardness meter, the optimum setting is 30 to 90 degrees. On the machined surface, if the appearance is white due to slight burns or stains, it tends to occur, which causes an increase in the defect rate. Therefore, by mixing, for example, 0.05 to 5 parts of carbon black as a coloring pigment for coloring, the floor surface is free from stains and the appearance defect can be significantly reduced. The sliding contact piece 35 of the present invention will be described below.
Table 1 is shown as a compounding example of the molding material of P-180.

[0027]

[Table 1]

Table 2 shows the general physical properties of the flexible material used for the sliding contact piece molded under the above conditions.

[0029]

[Table 2]

[0030]

As is apparent from the above description, according to the present invention, a hydrogenated unsaturated nitrile conjugated diene polymer and a hydrogenated unsaturated nitrile conjugated diene polymer are used as the molding material for the sliding contact piece provided in the longitudinal direction of the rotor peripheral surface of the agitator. Unsaturated nitrile conjugated diene polymer finely dispersed with an ethylenically unsaturated carboxylic acid metal salt, and medium to high nitrile rubber, polyvinyl chloride 10 to 50%
(Wt%) polymer-blended rubber, the above three materials are blended at a ratio of 10 to 50% (Wt%), respectively, and a vulcanized product obtained by vulcanizing with an organic peroxide vulcanizing agent is obtained. As a result, the molding processability can be reduced by 15% in the kneading time during compounding. The releasability at the time of molding was remarkably improved, and in the conventional molding material, it was necessary to apply a mold release agent for each molding, and even then, problems due to mold stains occurred. On the other hand, with the material of this time, it is possible to mold from 50 to 100 shots without any trouble without applying a release agent.

The reason for this is that the hydrogenated unsaturated nitrile conjugated diene-based polymer has a low cross-linking density because it has very few double bonds, and has a high fluidity like thermoplastics.
The hydrogenated unsaturated nitrile conjugated diene polymer in which the metal salt is ultrafinely dispersed in the rubber has a high affinity with the mold and a low cohesive force because it flows densely into the uneven surface of the mold. It is thought that this is because of the close contact with the mold. On the other hand, in the present invention, since a blended product of a medium-high nitrile rubber and a polyvinyl chloride resin is added as a molding material, the crosslink density is high, and the vulcanization progresses slightly faster at the diene bond portion. While being molded, the mold releasability is improved. Also, in terms of material cost, a blended product of low-cost medium-high nitrile rubber and polyvinyl chloride resin is used, which makes it possible to greatly contribute to cost reduction. It has been proved that no wear resistance and no decrease in friction coefficient were observed, and that no trouble was caused as a material for sliding contact pieces.

Next, the hardness of the sliding contact piece is 30 to 90 degrees (JIS
K 6301, spring hardness tester A type), when contacted with the surface to be cleaned, a familiar phenomenon occurs in the optimum condition on the surface, and the surface is effectively squeezed and the surface to be cleaned is removed. Dust is released, and the released dust makes it easier to work in the floor nozzle body by the restoring force of the sliding piece, which greatly contributes to the improvement of dust collection efficiency.
Further, by adding 0.05 to 3% of carbon black to the sliding contact piece and slightly coloring it, the effect of significantly reducing the appearance defect such as burning at the time of processing without causing stains on the floor surface is imparted. It is possible. From the above results, it has become possible to provide a floor nozzle for an electric vacuum cleaner, which has high durability and high dust collection property and is excellent in workability.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of an agitator showing an embodiment of the present invention.

FIG. 2 is a top view of the floor nozzle of the embodiment with the upper main body removed.

FIG. 3 is a sectional view of a floor nozzle in the same embodiment.

[Figure 4] Side view of the main part of the agitator

[Fig. 5] An explanatory view of action

[Explanation of symbols]

 7 Floor nozzle body 16 Agitator 35 Sliding contact piece 36 Protrusion

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Keiji Toyota, 1-2-1 Yokou, Kawasaki-ku, Kawasaki-shi, Kanagawa Nihon Zeon Co., Ltd. (72) Takemitsu Okuma, 1006 Kadoma, Kadoma, Osaka Prefecture National Tires In the company

Claims (4)

[Claims] 1. An agitator having a flexible sliding contact piece provided on a peripheral surface of a rotor and a drive source thereof are internally provided in a floor nozzle main body, and the sliding piece is made of a non-hydrogenating material. A saturated nitrile conjugated diene-based copolymer and a hydrogenated unsaturated nitrile conjugated diene-based copolymer in which an ethylenically unsaturated carboxylic acid metal salt is finely dispersed, and polyvinyl chloride 10-50% (Wt %) Polymer-blended rubber, using a vulcanized product obtained by blending these three materials at a ratio of 10 to 50% (Wt%) and vulcanizing with an organic peroxide vulcanizing agent Floor nozzle for electric vacuum cleaner. 2. A floor nozzle for an electric vacuum cleaner according to claim 1, wherein 1 to 10 parts of a fluorine resin and 1 to 5 parts of a silicone rubber are added in addition to the above three components. 3. The vulcanizate hardness is measured by JIS K 6301, spring hardness tester type A, and the hardness is 30 to 90.
The floor nozzle for an electric vacuum cleaner according to claim 1, wherein the floor nozzle is set so as to have a predetermined frequency. 4. The floor nozzle for an electric vacuum cleaner according to claim 1, wherein the sliding contact piece is colored with 0.5 to 10% of titanium oxide and 0.05 to 5% of carbon black.