JPS6033898Y2 - Suction pipe for vacuum cleaner - Google Patents

Description

[Detailed Description of the Invention] The present invention provides a pipe for a vacuum cleaner which can be easily attached to any type of conventional vacuum cleaner and which has the feature that the pipe does not become clogged with dirt.

In the past, efforts to reduce the noise of vacuum cleaners have been made mostly with respect to the vacuum cleaner itself.

The countermeasures are: 1. Reducing the exhaust noise emitted from the exhaust hole by using sound absorbing materials, 2. Reducing the noise transmitted through the entire wall surface of the main body by using sound absorbing materials, 3. Reducing the noise transmitted through the entire wall of the main body by using sound absorbing materials, and 3. Improving the support gasket of the fan motor. Rotational speed noise (plane, where N is the number of revolutions per minute.

Therefore, in reality, it is used at a rotational speed of about 20,000 to 25,000 R0P, M, so the noise range is 330 Hz to 420 Hz.

) is reduced by a method that does not conduct it to the main body, etc.

As a result of these studies, the noise level of the vacuum cleaner body was determined to be close to 50 phonA as measured based on Japanese Industrial Standards.

On the other hand, research is underway to reduce noise from floor nozzles, hoses, extension pipes, etc., and many patents and utility models have been published, particularly regarding floor nozzles.

Furthermore, a method has been adopted in which the extension pipe is provided with a sound-deadening structure to prevent the noise from the vacuum cleaner body from being emitted from the floor nozzle opening via the hose and extension pipe.

The noise reduction structure in the conventional extension pipe will be explained in more detail.

As shown in FIG. 1, the extension pipe is composed of two pipes, and noise reduction is performed inside the thick extension pipe.

The inside of the thick extension pipe is filled with open-cell foamed resin, and a pipe made of non-woven fabric is installed inside it.

For this reason, extension pipes have been difficult to use because they cannot be adjusted in length or are thick and large.

Furthermore, since the inner wall of the sound-absorbing structure is made of non-woven fabric,
The fibers of the nonwoven fabric and the inhaled dust become entangled, increasing the ventilation resistance of the pipe.

Further, there are problems in that the nonwoven fabric can be damaged by sharp metal pieces, broken glass, etc.

The present invention is intended to solve the above problems, and one embodiment thereof will be described below based on FIGS. 2 to 5.

In the figure, 1 is a floor suction nozzle having a rotating pipe 2, 3 is an extension pipe that can be adjusted telescopically with a tightening nut 4, 5 is a connecting pipe connected to one end of a flexible hose 6,
Reference numeral 7 denotes a suction pipe main body (hereinafter referred to as the main body) of the present invention, which has a cylindrical shape, and connecting pipes 8 and 9 are provided on both end faces thereof.

The main body 7 has an outer tube 10 integrally formed with the connecting tube 8 and an outer tube 11 integrally formed with the connecting tube 9 at the fitting part 1.
It is constructed by gluing it together with 2.

In this case, there are no limitations on the means, such as screwing or screwing, as long as airtightness can be ensured.

The inner cylinder 13 has a thickness of 0.1rIr! It is made of n to several pieces of nonwoven fabric that have undergone special processing as described later, and is formed into a cylindrical shape by being joined at the joining part 15 by means such as adhesion, welding, or heat fusion.

The inner cylinder 13 and the main body 7 are joined at fitting parts 16 and 17.

The cylindrical gap between the inner tube 13 and the main body 7 is filled with felt,
Sound-absorbing materials with good sound-absorbing properties such as asbestos and glass wool 1
4 is included.

The inner cylinder 13 is made of nonwoven fabric, but the extremely thin surface layer on the inner peripheral side of the inner cylinder is smoothed by heat processing or resin processing.

Therefore, the problem of fluff that tends to occur with nonwoven fabrics does not occur at all.

The thickness of the process ranges from the thickness of several fibers to the thickness of 0.
It is extremely thin, about 2rrvn.

In the case of heat compression from one side using a heat roller, it is difficult to strictly separate the film forming part 18 and the raised part 19;
Normally, there is a gradient in fiber density from the heated surface to the opposite side, but at least the surface layer is smoothed and processed to the extent that it achieves film-like density and a fluff-preventing effect.

Note that since the fibers are made into a film, the density of the fibers is greatly increased, but fine pores remain.

In the above configuration, when the noise inside the vacuum cleaner body is transmitted through the hose and reaches the silencing section, the sound waves pass through the inner tube 13 and enter the sound absorbing material 14 .

Sound waves that enter the sound absorbing material are attenuated by intrusion between the fibers and absorption by the fibers.

Therefore, the sound waves that have once entered the sound absorbing material are greatly attenuated by the time they are reflected on the inner wall of the outer cylinder and come out from the inner cylinder 13 into the passage, resulting in low noise.

The thinner the film-formed portion 18 of the inner cylinder 13 is, the thinner it becomes.
Since the transmission performance of sound waves is improved, the sound absorption effect is increased.

Furthermore, by smoothing the surface of the inner cylinder 13, it is possible to completely eliminate the adhesion of dirt (particularly hair, fibers, and sand particles), and the inner cylinder 13 is formed into a film with fine pores. Due to the increased fiber density, the strength has also been greatly improved,
Durability against scratches is also improved.

The pipe body 7 has the pipe dimensions of the connecting pipes 8 and 9 such as floor nozzle pipes, extension pipes, etc., which are conventionally used in general households.
It has common dimensions so that attachments such as hose pipes can be connected, and therefore, noise reduction can be easily achieved by simply attaching the pipe body 7 of the present invention to a conventionally used vacuum cleaner.

As described above, according to the present invention, it is possible to provide a low-noise pipe that can be easily installed and removed and is less likely to be clogged with dirt, and has extremely great practical value.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the configuration of a conventional example, Fig. 2 is an explanatory diagram of the configuration using a suction pipe in an embodiment of the present invention, Fig. 3 is a sectional view of the suction pipe, and Fig. 4 is the same as that of Fig. 3. AA' sectional view, and FIG. 5 is an enlarged sectional view of the main part of FIG. 4. 3...Extension pipe, 5...Connection pipe, 7
...Pipe body, 8,9...Connection pipe,
10, 11... Outer pipe, 12... Fitting portion, 13... Inner cylinder, 14... Sound absorbing material.

Claims (1)

[Scope of utility model registration request] It has a pipe main body and connecting pipes located at both ends of the pipe main body and configured so that they can be connected in series by fitting attachments such as extension pipes and connecting pipes, and the pipe main body is integrally connected to each of the connecting pipes. an outer cylinder formed into two halves that are fitted together at a fitting portion, an inner cylinder located concentrically with the outer cylinder, and a sound absorbing material sealed in the space between the inner cylinder and the outer cylinder. and a suction pipe for a vacuum cleaner, wherein the inner cylinder is made of a nonwoven fabric, and the inner peripheral surface layer is smoothed and formed into a film.