JP3506828B2 - Sound-prevention structure of outer enclosure - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermal expansion and contraction due to a temperature difference of a connecting portion connecting adjacent folded plate building boards in an enclosure such as a wall and a roof made of folded plate type building boards. The present invention relates to a sound-preventing structure of an outer body that prevents a sounding phenomenon that occurs.

[0002]

2. Description of the Related Art Conventionally, a roof made of metal building board,
Many enclosures such as walls are constructed. Folded plate type building boards that compose such an enclosure are formed with connecting bending parts on both sides in the width direction, and a plurality of such building boards are arranged side by side to connect adjacent building boards to each other. The bending portion is connected through various connecting means, and the outer envelope is constructed. In this type of outer enclosure, in addition to the single-layer type, a two-layer type consisting of an upper outer enclosure and a lower outer enclosure,
Alternatively, there is a three-layer type outer enclosure having an intermediate enclosure between the upper enclosure and the lower enclosure. Further, as shown in FIG. 11, the conventional sealing body of the prior art is one in which an upper treat portion is constructed on the lower treat portion, and the top seal portion of the lower treat portion has good watertightness. An inclusion such as a soft sealer is provided for this purpose. Even in this case, the inclusions are a part between the adjacent building boards and are not entirely interposed between the contact points of the adjacent building boards.

[0003]

A sounding phenomenon may occur in such an enclosure formed by connecting a plurality of folding board type building boards, respectively. This audible noise phenomenon is a metallic noise that hits an enclosure such as a roof or a wall violently due to a difference in outside air temperature. The cause of this is the thermal expansion and contraction in the longitudinal direction of the building board due to the temperature difference based on the degree of sunlight hitting, and when the adjacent building boards have different thermal expansion and contraction amounts, the difference in the thermal expansion and contraction amount is for connecting. It becomes the sound of the rubbing of the bent parts.

The cause of the difference in the amount of thermal expansion and contraction of the connecting bending portions of the adjacent building boards is the shape of the building boards. That is, in the case where the width direction cross-sectional shape of the building board is concave, the positions of the connecting bending portions on both sides in the width direction are high, and the cross-sectional shape of the enclosure constructed with such a building board is high. Since the mountain-shaped part is formed intermittently, there are parts that are exposed to sunlight and parts that are not exposed to the mountain-shaped part, the thermal expansion and contraction of the part exposed to the sunlight is large, and the thermal expansion and contraction is small in the parts that are not exposed. It will be. Such a difference in the amount of thermal expansion and contraction results in a relative sound of rubbing between the metals at the connecting bending portion, which causes discomfort to the occupants as a noise phenomenon.

[0005]

Therefore, as a result of intensive studies, the inventors of the present invention have solved the present invention as a result of solving the above problems.
A two-layer enclosure, in which the upper enclosure has a rising side portion formed from both side portions in the width direction of the main plate, and a lower port portion is formed at one upper end of the coexistence rising side portion and the other At the upper end, a plurality of building boards with upper funnels are arranged side by side, and a non-metallic soft material is interposed at least at the fastening metal fittings between the lower and upper funnels of adjacent building boards. And an upper outer casing that is contacted with the non-metallic soft material at both the lower and upper dents and prevents the lower and upper dents from directly contacting each other at the non-metallic soft material. A lower enclosure formed of a plurality of lower building boards each having a lower cavity portion on one side in the width direction and an upper cavity portion on the other side below the upper enclosure; Is extremely simple because it has a structure for preventing sounding of the outer enclosure, which is supported on the lower outer enclosure through a support tool provided with the above-mentioned tightening metal fittings. Sound phenomenon in made structures can be prevented, is obtained by solving the above problems.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. The upper outer enclosure A is composed of a plurality of building boards A ₁ , A ₁ , ... The building board A ₁ has rising side portions 2 and 2 formed from both side portions of the main plate 1 in the width direction.
Is formed, and the upper end portion 4 is formed at the other upper end. Then, this construction board A _1, A ₁ ... a plurality arranged such, linked tanning together馳締a lower馳部3 and the upper馳部4 architectural plates A _1, A ₁ and adjacent , Roofs, walls, etc. will be constructed. Lower part 3 and upper part 4
Has an arc shape as shown in FIGS. 2 (A) and 2 (B). In addition, there is also a type in which the lower casing portion 3 and the upper casing portion 4 are triangular (see FIGS. 9A and 9B).

The outer enclosure composed of the building boards A ₁ , A ₁ ... Is referred to as an upper outer enclosure A, and a two-layer outer enclosure (composed of the upper outer enclosure A and the lower outer enclosure B) (See FIG. 1) and a single-layer enclosure (see FIG. 8B) mainly consisting of a plurality of building boards A ₁ , A ₁ ... In its two-layer enclosure,
As shown in FIG. 1, it comprises an upper enclosure A and a lower enclosure B, and the lower enclosure B is composed of lower building boards B ₁ , B ₁ ... Constituting building board A ₁
In the same type as described above, lower rising side portions 12, 12 are formed on both sides of the lower main plate 11 in the width direction.
Bending portions 13 and 13 for connection are formed at the upper ends of 2 and 12. Further, there is an embodiment in which the lower cap member B ₂ is connected to the bent portions 13 and 13 of the lower building plates B ₁ and B ₁ which constitute the lower outer enclosure B by fitting means (FIG. 10). reference).

There are various embodiments of the connecting bent portions 13 and 13. In the first embodiment, as in the case of the building board A ₁ constituting the upper outer casing A, the lower embossing portion is formed. Thirteen
a and the upper part 13b, the lower part 13a and the upper part 1
3b is fastened and connected. Further, another embodiment of the connecting bending portions 13 and 13 is a superposition type, and the connecting connecting bending portions 13 and 13 are formed in a half-mountain shape. Polymerize,
The tops of the connecting bent portions 13, 13 formed in the mountain-shaped portion are passed through bolts provided perpendicularly to the receiving metal fitting and tightened with a nut to form a lower envelope B [Fig. 8].
(See (A)].

A support tool C is used to support the upper enclosure A on the lower enclosure B. There are various embodiments of the supporting tool C. First, as shown in FIGS. 4A and 4B, the supporting tool C is composed of a lower supporting body C ₁ and an upper supporting body C _2, and a lower supporting body C ₁ Then, the structure is such that it can be fixed to the connection of the lower building boards B ₁ , B ₁ ... Which constitute the lower outer enclosure B. Specifically, the lower building boards B ₁ , B ₁ ... Are provided with a mouthpiece mounting portion 14 that houses a mouthpiece portion composed of a lower mouth portion 13a and an upper mouth portion 13b, and a fixing portion that secures the mouthpiece portion. It is composed of 15 and. A bolt is used as the fixing portion 15, and as shown in FIG. 2, the fastening portion is internally provided in the fitting portion mounting portion 14, and the fixing portion 15 fixes the fastening portion. Further, when the lower outer casing B is a superposition type, the lower support C ₁ is fixed to a bolt provided perpendicularly to the receiving metal fitting [see FIG. 8 (A)].

Further, the upper support C ₂ is provided with tightening metal fittings 17 from the top of the upper main body 16, and auxiliary support plates 18, 18 are formed from both sides of the upper main body 16 in the width direction.
The lower fitting portion 3 and the upper fitting portion 4 are fixed by the tightening metal fitting 17, and the rising side portions 2, 2 are supported by the auxiliary support plates 18, 18. In addition, the support tool C may have a heat insulating structure by interposing a heat insulating member between the lower support C ₁ and the upper support C ₂ . Alternatively, as shown in FIG. 8 (A), the lower support C ₁ itself may have a heat insulating structure.

In the one-layer type enclosure and the upper enclosure A of the embodiment of the two-layer type, a plurality of adjacent construction boards A ₁ , A ₁ ... Adjacent construction boards A ₁ , A ₁ A non-metallic soft material 5 is mounted between the lower and upper casing parts 3 and 4. The non-metallic soft material 5 has elasticity or flexibility and has a band shape. Materials having such properties include, first of all, natural and synthetic rubbers such as neoprene rubber, styrene butadiene rubber, urethane rubber, polybutadiene rubber, acrylic rubber, styrene rubber, fluorine rubber, and silicone rubber, which have elasticity. Further, those having flexibility are soft laminated bodies such as long glass fiber laminated bodies, soft synthetic resins such as soft vinyl chloride, and foam materials such as polyethylene foam and polyurethane foam.

The non-metallic soft material 5 is interposed between the opposing lower and upper portions 3 and 4 of the adjoining building boards A ₁ and A ₁ , and the lower and upper portions 3 and 4 are provided. Is the non-metallic soft material 5
It is the one that is tightened while winding the [Fig. 2
(B), see FIG. 3 (B)]. And the non-metallic soft material 5
Is interposed to such an extent that the lower part 3 or the upper part 4 of the adjacent building boards A ₁ and A ₁ do not come into direct contact with each other. The non-metallic soft material 5 is continuously interposed along the longitudinal direction of the building board A ₁ , that is, along the longitudinal direction of the lower fastening portion 3 and the upper fastening portion 4 in the fastening portions [Fig. 7 (A)].
In this way, by eliminating the direct contact portion between the lower and upper casing parts 3 and 4 of the adjacent building boards A ₁ and A ₁ , there is no rubbing due to direct contact between metals, Both the lower and upper dents 3 and 4 come into contact with the non-metallic soft material 5 to muffle the frictional noise caused by thermal expansion and contraction in the longitudinal direction,
Alternatively, it can be a very quiet sound.

Further, as another embodiment of the mounting state between the non-metallic soft material 5 between the lower and upper casing parts 3 and 4, FIG.
As shown in (B), a part where the non-metallic soft material 5 is not interposed may be formed. Also in this embodiment, it is preferable that a portion where the non-metallic soft material 5 does not intervene has a distance as small as possible to reduce friction between the lower and the upper jaw portions 3 and 4 by direct contact. Empirically, the coverage of the non-metallic soft material 5 is 50.
If it is less than%, sound may be produced although it is weak. 2
When it was less than 0%, almost no effect was observed.

Next, as the structure constituted by the upper outer casing A and the lower outer casing B, both surfaces of the fastening metal fitting 17 of the upper supporting member C ₂ of the supporting member C and the auxiliary supporting plates 18, 18
There is a non-metallic soft material 5 attached to each of them (see FIG. 4 (B)). That is, the non-metallic soft materials 5 and 5 are adhered to both sides of the fastening metal fitting 17 so that the lower and third mouth portions 3 and 4 do not come into direct contact with the fastening metal fitting 17 [Fig. Four
(See (C)]. Also, by sticking the non-metallic soft material 5 on both auxiliary support plates 18, 18, the upper surface of the adjacent upside portions 2, 2 of the adjacent construction boards A ₁ , A _{1 and} the back surface of the support C are supported. It is designed so that there is no direct contact with.

Further, there is an embodiment in which the non-metallic soft material 5 is provided between the support tool C and the lower envelope B. In the embodiment, the lower building plate B ₁ , B ₁ forming the lower outer enclosure B is centered around the lower fastening portion 13a and the upper fastening portion 13b, and is wound around the fastening portion. The non-metallic soft material 5 is laid, and the supporting tool C is fixed to the fastening portion of the lower envelope B via the non-metallic soft material 5. The support tool C and the lower outer enclosure B are prevented from directly contacting each other. Furthermore, there is also an embodiment in which the non-metallic soft material 5 interposed between the lower and upper portions 3 and 4 is only the place where the support tools C, C, ... Are arranged [FIG.
(See (C)]. In addition, the lower enclosure B is attached to the lower cap material B.
Shall be installed non-metallic soft material 5 in the lower building board B _1, B ₁ ... similarly even when the type to be fitted to the connecting bent portion 13, 13 of the lower enclosure on B adjacent _two However, in this case, the non-metallic soft material 5 is laid around the lower cap material B ₂ portion, and the support tool C is fixed via the non-metallic soft material 5.

[0016]

The invention of claim 1 is a two-layer enclosure, in which the upper enclosure A has rising side portions 2 formed from both side portions of the main plate 1 in the width direction. Sides 2, 2
A plurality of building boards A ₁ , A ₁ each having a lower portion 3 formed on one upper end and an upper portion 4 formed on the other upper end are arranged in parallel, and adjacent building boards A ₁ , A ₁ below馳部3 and the upper馳部4
The non-metallic soft material 5 is interposed between at least 17 tightening metal fittings and is fastened, and both the lower and upper mouth portions 3, 4 contact the non-metallic soft material 5 and the non-metallic soft material. An upper outer casing A is formed so that the lower casing portion 3 and the upper casing portion 4 do not come into direct contact with each other at five portions of the material. Below the upper outer casing A, a lower casing portion 13a is provided on one side in the width direction and the other is formed on the other side. A lower outer enclosure B composed of a plurality of lower building boards B ₁ , B ₁ ... Each of which has an upper cavity portion 13 b formed on the side thereof is provided, and the upper outer enclosure A is a support including the tightening metal fitting 17. With the sound-proof structure of the outer body supported on the lower outer body B via C, first, the sound phenomenon can be prevented, and secondly, the structure is extremely simple. Thus, various effects such as simple and quick construction can be obtained.

The above effects will be described in detail. Building boards A ₁ , A
_{In 1} ..., the non-metallic soft material 5 is provided between the lower and upper portions 3, 4 so that the lower and lower portions 3 and 4 do not come into direct contact with each other. it can. For this reason, in the conventional case, when the lower and third mouth portions 3 and 4 are in direct contact with each other, and the adjacent lower and third mouth portions 3 and 4 have different amounts of thermal expansion and contraction, the lower and third portions 3 and 4 are in contact with each other. Noise will be generated by rubbing against the casing 4. However, in the present invention, the lower part 3
Since the non-metallic soft material 5 is interposed between the upper and lower portions 4, there is no direct contact between the lower portion 3 and the upper portion 4, and the lower portion 3 and the upper portion 4 are not in contact with each other. Since it is in contact only with the metallic soft material 5, they do not rub each other directly and noise can be prevented. further,
The thermal expansion and contraction of the upper envelope A with respect to the lower support C ₁ can be coped well, and the noise phenomenon can be prevented.

Next, a second aspect of the present invention is, according to the first aspect, a tightening metal fitting 17 for tightening the lower and third casings 3 and 4.
Since the non-metallic soft material 5 is provided in the outer ring to provide the sound-proof structure of the outer enclosure, the sound-noise phenomenon in the tightening metal fitting 17 can be reliably prevented.

According to a third aspect of the present invention, in the first or second aspect, the non-metallic soft material 5 is laid on the lower envelope B, and the support tool C is fixed on the non-metallic soft material 5. With the structure for preventing sounding of the outer enclosure, the support tool C can move on the lower outer enclosure B via the non-metallic soft material 5 when the upper outer enclosure A is thermally expanded and contracted. , The sounding phenomenon can be prevented.

Next, in the invention of claim 4,
Or 3, the supporting tool C is provided with auxiliary supporting plates 18, 18 below the tightening metal fitting 17, and the auxiliary supporting plates 18, 18 are provided.
Since the non-metallic soft material 5 is laid on the outer enclosure to prevent the sounding of the outer enclosure, it is possible to prevent the sounding phenomenon at the portion supporting the upper outer enclosure A at the support C location. it can.

The invention of claim 5 is a two-layer enclosure,
The upper enclosure A has rising side portions 2 and 2 formed from both side portions of the main plate 1 in the width direction, and a compatible lower side portion 2 is formed at one upper end of the ascending side portions 2 and 2, and the other side thereof is formed. A plurality of building boards A ₁ and A ₁ each having the upper portion 4 are formed side by side at the upper end,
The non-metallic soft material 5 is interposed between at least 17 tightening metal fittings between the lower and upper portions 3 and 4 of the adjoining building boards A ₁ and A ₁ to be tightened, and the lower portion 3 , An upper enclosure A which is in contact with both the non-metallic soft material 5 and the non-metallic soft material 5 so as not to directly contact the lower and the upper carousels 4 and 4 with the non-metallic soft material 5. Below the outer enclosure A, a plurality of lower building boards B ₁ , B ₁ ... Adjacent mountain-shaped portions are overlapped to form a lower outer enclosure B, and the upper outer enclosure A is the tightening metal fitting. 1
Since the structure for preventing noise of the outer body is supported on the lower outer body B through the support tool C provided with 7, the thermal expansion and contraction hardly occur in the polymerized lower outer body B. Therefore, the sounding phenomenon can be prevented through the non-metallic soft material 5 even when only the upper enclosure A is thermally expanded and contracted, and a particularly low-priced two-layer enclosure can be configured.

Next, in the invention of claim 6, in claim 5, the nonmetallic soft material 5 is laid on the lower envelope B, and the support tool C is fixed on the nonmetallic soft material 5. With the sound-proof structure of the outer enclosure, the support tool C can move on the lower outer enclosure B via the non-metallic soft material 5 when the upper outer enclosure A is thermally expanded and contracted. It is possible to prevent the noise phenomenon.

In the invention of claim 7, the upper envelope A is a two-layer enclosure, and the upper enclosure A is formed with rising side portions 2 and 2 from both side portions of the main plate 1 in the width direction. 2, 2
A plurality of building boards A ₁ , A ₁ each having a lower portion 3 formed on one upper end and an upper portion 4 formed on the other upper end are arranged in parallel, and adjacent building boards A ₁ , A ₁ below馳部3 and the upper馳部4
The non-metallic soft material 5 is interposed between at least 17 tightening metal fittings and is fastened, and both the lower and upper mouth portions 3, 4 contact the non-metallic soft material 5 and the non-metallic soft material. At the 5 locations of the material, an upper outer enclosure A is formed so that the lower and third upper and outer casings 3 and 4 do not come into direct contact with each other, and a lower outer enclosure B is provided below the upper outer enclosure A. Body B is an adjacent lower building board B
₁ , B ₁ ... The lower cap member B ₂ is fitted to each other, and the upper outer casing A is supported by the lower outer casing B via a support tool C provided with the tightening fitting 17. Due to the sound-proof structure of the enclosure, thermal expansion and contraction hardly occur in the fitting-type lower enclosure B. Therefore, even when only the upper enclosure A thermally expands and contracts, the non-metallic soft material 5 It is possible to prevent the sounding phenomenon through the, and it is possible to provide a particularly low-priced two-layer enclosure.

Next, in the invention of claim 8, in claim 7, the nonmetallic soft material 5 is laid on the lower envelope B, and the support tool C is fixed on the nonmetallic soft material 5. Due to the noise prevention structure of the outer enclosure, the fitting-type lower outer enclosure B is less likely to undergo thermal expansion and contraction. Therefore, even when only the upper enclosure A is thermally expanded and contracted, it is non-metallic. The sounding phenomenon can be prevented through the soft material 5, and a particularly low-priced two-layer enclosure can be manufactured.

[Brief description of drawings]

FIG. 1 is a schematic front view showing a two-layer enclosure including a lower enclosure and an upper enclosure provided with a non-metallic soft material.

FIG. 2 (A) is a longitudinal sectional front view of a main part of the present invention. FIG. 2 (B) is an enlarged longitudinal sectional front view showing a state in which a non-metallic soft material is interposed between the lower and upper treats and the casing is fastened. Figure

FIG. 3 (A) is an exploded perspective view showing a lower casing part, an upper casing part and a non-metallic soft material, and (B) is a perspective view showing a partial cross section of the casing clamping part composed of the lower casing part and the upper casing part. Figure

FIG. 4A is a perspective view of a support tool. (B) is a vertical sectional front view of the support. (C) is an enlarged sectional view of the lock

FIG. 5 (A) is a vertical sectional front view of a support tool. (B) is an enlarged sectional view of the lock

FIG. 6 (A) is a perspective view showing a state in which a non-metallic soft material is laid on the lower envelope and the support is fixed on the lower envelope via the non-metallic soft material (B). Is a longitudinal sectional front view showing a state in which a non-metallic soft material is laid on the lower envelope and the support is fixed on the lower envelope via the non-metallic soft material.

FIG. 7A is a schematic plan view of an embodiment in which a non-metallic soft material is interposed along the longitudinal direction of the lower and upper treats, and FIG. 7B is a longitudinal view of the lower and upper treats. The schematic plan view of the embodiment in which the non-metallic soft material is intermittently interposed along the direction is a schematic plan view of the embodiment in which the non-metallic soft material is interposed only in the tightening metal fittings.

FIG. 8 (A) is a vertical sectional front view of a main part of a two-layer enclosure using an embodiment in which a lower enclosure is composed of a polymer type building board; Vertical front view of an embodiment used for a type of enclosure

FIG. 9 (A) is a longitudinal sectional front view of a main part of a two-layer type outer enclosure in which an upper enclosure and a lower enclosure both have a square-shaped lower and upper funnels. Front view of the main part of the one-layer type enclosure with the lower and upper fenders

FIG. 10 is a vertical cross-sectional front view of a main part of a two-layer enclosure using an embodiment in which a lower enclosure is composed of a fitting type building board using a cap material.

FIG. 11 (A) is a cross-sectional view of a prior art mouthpiece enclosure where the upper mouth portion is a lower mouthpiece, and FIG. 11 (B) is a top view portion of the prior art earpiece enclosure. Enlarged sectional view of the main part of the

[Explanation of symbols]

A ... upper enclosure A ₁ ... building board B ... lower enclosure B ₁ ... lower building board C ... support 1 ... main plate 2 ... rising side portion 3 ... lower馳部4 ... upper馳部5 ... non Metallic soft material 17 ... Braces

Claims (8)

(57) [Claims] 1. A two-layer enclosure having an upper enclosure
Is a rising side portion is formed from both side portions in the width direction of the main plate,
At the same time, a lower part is formed at one upper end of the ascending side,
On the other upper end, a plurality of building boards with an upper port is formed side by side, and a non-metallic soft material is located at least at the fastening metal fittings between the lower and upper ports of the adjacent building panels. Intervening
Both the lower and upper dents contact the non-metallic soft material.
Moreover, in the non-metallic soft material portion, the lower and upper treats are directly connected to each other.
A lower outer part made up of a plurality of lower building plates, each of which is formed so as not to come into contact with each other, and a lower part is formed on one side in the width direction and an upper part is formed on the other side below the upper part. A sound noise prevention structure for an outer enclosure, wherein an outer enclosure is provided, and the upper outer enclosure is supported on the lower outer enclosure via a support tool provided with the tightening fitting . 2. The sound noise prevention structure for an outer enclosure according to claim 1, wherein a non-metallic soft material is provided on the tightening metal fitting for tightening the lower and upper funnels. . 3. The enclosure according to claim 1, wherein a nonmetallic soft material is laid on the lower enclosure, and a support is fixed on the nonmetallic soft material. Noise prevention structure. 4. The support according to claim 1, wherein the support is provided with an auxiliary support plate at a lower portion of the tensioning metal fitting, and the non-metallic soft material is laid on the auxiliary support plate. Soundproof structure of the outer body. 5. A two-layer enclosure having an upper enclosure
Is a rising side portion is formed from both side portions in the width direction of the main plate,
At the same time, a lower part is formed at one upper end of the ascending side,
On the other upper end, a plurality of building boards with an upper port is formed side by side, and a non-metallic soft material is located at least at the fastening metal fittings between the lower and upper ports of the adjacent building panels. Intervening
Both the lower and upper dents contact the non-metallic soft material.
Moreover, in the non-metallic soft material portion, the lower and upper treats are directly connected to each other.
As an upper envelope that does not contact, the lower envelope is provided below the upper envelope by stacking adjacent mountain-shaped portions of a plurality of lower building boards, and the upper envelope is Said money
A noise preventing structure for an outer enclosure, which is supported on a lower outer enclosure via a support tool including a tool. 6. The sound of an enclosure according to claim 5, wherein a non-metallic soft material is laid on the lower enclosure, and a support is fixed on the non-metallic soft material. Noise prevention structure. 7. A two-layer enclosure, the upper enclosure of which is a two-layer enclosure.
Is a rising side portion is formed from both side portions in the width direction of the main plate,
At the same time, a lower part is formed at one upper end of the ascending side,
On the other upper end, a plurality of building boards with an upper port is formed side by side, and a non-metallic soft material is located at least at the fastening metal fittings between the lower and upper ports of the adjacent building panels. Intervening
Both the lower and upper dents contact the non-metallic soft material.
Moreover, in the non-metallic soft material portion, the lower and upper treats are directly connected to each other.
An upper enclosure that does not contact with each other, a lower enclosure is provided below the upper enclosure, and the lower enclosure is constructed by fitting a lower cap member to adjacent lower building boards, A sound noise preventing structure for an outer envelope , wherein the upper outer envelope is supported on the lower outer envelope via a support tool provided with the tightening metal fitting . 8. The sound of the enclosure according to claim 7, wherein a non-metallic soft material is laid on the lower enclosure, and a support is fixed on the non-metallic soft material. Noise prevention structure.