JPS6350719Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to the improvement of a soundproofing body that is used by being fitted over noise sources such as household electrical appliances such as vacuum cleaners, mixers, and air conditioners, and motors of various industrial machines. be.

Conventionally, this type of soundproofing material has been made by forming a strip-like material with a predetermined thickness from soft polyurethane foam, rolling the material into a cylindrical shape, temporarily fixing both ends with adhesive tape, and then stapling. The product was manufactured by fixing it in several places. It is extremely troublesome to roll up the strip material one by one and join the ends with adhesive tape and staples, and the joining work has to be done manually, which makes it difficult to mass-produce. It was hot. Also, since the product is cylindrical,
As it is, it is very inconvenient for packing and storing.
Therefore, in the past, it was necessary to form the product into a cylindrical shape and then flatten it using a press and process it into a shape suitable for packaging and storage, which required extra labor, and this was a factor that significantly increased the cost of the product. Ta. Moreover, in conventional products, the inner circumferential surface of the soundproofing body is fitted in close contact with the outer circumferential surface of the motor, etc., which inhibits the cooling effect of the heat dissipation of the motor, etc., and as a result, the motor, etc. becomes abnormal. fever,
There were problems such as shortening of its lifespan.

In view of these points, the present invention eliminates the need for joining as in the past, has a simple structure, can be mass-produced extremely easily, greatly reduces product costs, and can be used as a flat plate when not in use. It can be efficiently packed and stored without taking up much space, and when in use, it can be turned into a cylinder and can be easily attached to a motor, etc.
without interfering with heat dissipation and cooling of motors, etc.
The object of the present invention is to provide a soundproofing body that can be used safely by preventing abnormal heat generation.

In the present invention, a slit having a predetermined length in the width direction and penetrating in the longitudinal direction is provided in the center part in the thickness direction of a plate-shaped material made of a soundproofing material with appropriate elasticity and sound absorption properties such as soft polyurethane foam. This is a soundproofing body which is fitted onto a motor or the like by opening the slit, and is characterized in that a plurality of grooves extending in the longitudinal direction are formed on opposing inner surfaces of the slit.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

Reference numeral 1 denotes a soundproofing body, in which a wavy shape is formed in the center of the thickness direction of a plate-like material made of a soundproofing material having appropriate elasticity and sound absorption properties such as soft polyurethane foam, and having a predetermined length in the width direction and penetrating in the longitudinal direction. It is formed with a slit 2. Furthermore, by forming the slit 2 in a wavy shape as described above, the opposing inner surfaces of the slit 2 become wavy uneven surfaces, and a plurality of grooves 22 are formed along the longitudinal direction in the troughs. There is. When using soft polyurethane foam as the above-mentioned material, either open cell or closed cell foam may be used.

When the soundproofing body 1 is not in use, it has a flat plate shape as shown in FIG. 1 due to the restoring force of the material itself, but when it is in use, it has a flat plate shape as shown in FIGS. 2 to 4. If the wavy slit 2 is opened and elastically deformed into a cylindrical shape, and in this state is fitted onto the motor 5 of a vacuum cleaner 4, for example, the peaks 21 of the opposing wavy surfaces of the slit 2 will be affected by the restoring force of the material itself. Therefore, it is in close contact with the outer circumferential surface of the motor 5, and a plurality of tunnel-shaped gaps 3 penetrating in the axial direction are formed between the troughs or grooves 22 of the wavy surface and the motor outer circumferential surface. A soundproof body 1 is fitted and held around the outer periphery of the motor 5. In addition, in FIG. 3, 6 is a suction port, 7 is a dust collection chamber, and 8 is a dust suction fan connected to the motor 5.

When the soundproof body 1 is fitted onto the motor 5, noise from the motor 5 is absorbed by the soundproof body 1. That is, if the material is a soft polyurethane foam with open cells, the noise will be absorbed while passing through the bubbles from the convex portion 21 that is in close contact with the outer circumferential surface of the motor 5, and if the material is a soft polyurethane foam with single cells. , can exhibit a great sound absorption effect. In this way, the material exhibits a sound-absorbing effect that matches its own characteristics.

Furthermore, according to this soundproofing body 1, in the installed state, a plurality of tunnel-shaped gaps 3 are formed between the inner circumferential surface of the soundproofing body 1 and the outer circumferential surface of the motor 5. The exhaust flow path of the vacuum cleaner 4 is formed by this, and the exhaust flow (mainly swirling flow) of the vacuum cleaner 4 is rectified when passing through the tunnel-shaped gaps 3, and is reflected and resonates within each gap 3. Sound is absorbed, and therefore a very efficient soundproofing effect can be achieved against both the noise of the motor 5 and the noise of the exhaust flow. Furthermore, by passing the exhaust flow through the gap 3, the cooling effect of the motor 5 can be exerted, and abnormal heat generation of the motor 5 can be prevented.

By the way, the soundproofing body 1 may be foam-molded one by one into a predetermined external shape and then provided with the slits 2. However, as shown in FIG. If a plurality of soundproof bodies 1 are formed by cutting with a wavy cutting blade (not shown) and a wavy cutting blade (not shown), a plurality of soundproof bodies 1 can be formed at once, greatly improving mass productivity. As well as being able to
Yield can also be improved, making it possible to significantly reduce costs.

Further, as a means for forming grooves on the opposing inner surfaces of the slits, in the above embodiment, the wavy slits 2 were provided at the center in the thickness direction, but the slits 2 may be formed in the shape of a saw blade. As in the soundproof body 1a shown in Figures A and B, a plurality of holes 2b passing through the longitudinal direction are provided at predetermined intervals in the middle part of the linear slit 2a, and the slit 2a is opened and the motor 5 is fitted onto the outside. Accordingly, the hole 2b may be opened in half to form the groove 23, and a tunnel-shaped gap 3a may be formed between the hole 2b and the outer peripheral surface of the motor.

In the embodiment shown in FIG. 1, V-slits 24 are provided at both ends of the slit 2, and in the embodiment shown in FIG. 6, small circular holes 25 are provided at both ends of the slit 2b. This ensures that the slits 2, 2a are not torn from both ends. However, if the thickness of the soundproofing body 1 near both ends of the slits 2, 2a is made sufficiently large, or the strength of the material itself is made large, the slits 2,
This prevents accidental tears at both ends of 2a.
The ends of the V-slit 24, small circular hole 25, etc. need not necessarily be treated.

As explained above, according to the present invention, the structure is simple, there is no need to join each time as in the conventional method, it can be manufactured extremely easily by just cutting, and it is highly mass-producible and can significantly reduce costs. . In addition, since it is flat when not in use, there is no need to press it each time after production, which makes it convenient to handle and can be stored very compactly.

In particular, in the present invention, a groove is provided on the inner circumferential surface of the soundproofing body to form a tunnel-shaped gap passing through the soundproofing body in the longitudinal direction between the soundproofing body and the motor, etc., so that the characteristics of the material itself are In addition to the soundproofing effect due to the soundproofing effect, it is also possible to exhibit soundproofing effects such as sound reflection within the gap, sound absorption and sound reduction due to the resonance effect, and it is possible to exhibit an extremely excellent soundproofing effect. It has great practical effects, such as being able to prevent abnormal heat generation in motors, etc., without interfering with the cooling effect of the heat dissipation, and can be used with peace of mind.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the present invention, Fig. 2 is a perspective view showing the slit section in an open state, Fig. 3 is a schematic explanatory view showing its usage state, and Fig. 4 is a diagram showing the third embodiment. FIG. 5 is a perspective view of a base material showing an example of the manufacturing method of the soundproofing body of the present invention, FIG. 6A is a perspective view showing another embodiment, and FIG. This is a diagram equivalent to Figure 4. 1, 1a... Soundproof body, 2, 2a... Slit,
22, 23...Groove, 5...Motor.

Claims (1)

[Scope of utility model registration request] A slit having a predetermined length in the width direction and penetrating in the longitudinal direction is provided at the center in the thickness direction of a plate-shaped material made of a sound insulating material with appropriate elasticity and sound absorption properties such as soft polyurethane foam. A soundproofing body that is opened and fitted onto a motor, etc.,
A soundproofing body for a motor or the like, characterized in that a plurality of longitudinal grooves are formed on opposing inner surfaces of the slit.