JP6433102B2 - Soundproofing device and soundproofing method for portable generator - Google Patents

Description

  The present invention relates to a soundproofing device for a portable generator.

There is a soundproof box for a generator that houses the generator described in Patent Document 1. The soundproof box has an open / close door provided on one side of the soundproof box and a base configured to be slidable in and out of the soundproof box with the open / close door open. Since the soundproof box can reduce the noise generated by the generator, it is an extremely useful device when driving on the human side. The soundproof box has a structure that covers the entire outer periphery of the generator including the bottom surface. In particular, the soundproof box itself is considerably heavy because it has a pedestal configured to be slidable and needs to have rigidity to support the weight of the heavy generator.
Even a portable generator called a so-called portable generator generally has a weight exceeding about 20 kg. Therefore, since the generator itself is heavy and the soundproof box itself is considerably heavy, it is not easy to move it from the place where it is installed although it is called portable.

Japanese Patent No. 5591781

As described above, the soundproofing device that reduces the noise generated by the generator is a device that is useful for environmental hygiene when the generator is operated. However, if the generator itself is heavy and the soundproofing device is heavy, it takes a great deal of effort to carry them together. For this reason, it is desirable to provide soundproofing, but it is difficult to use the soundproofing device until it is carried.
This invention is invented in view of the said situation, and makes it a subject to provide the soundproof apparatus for portable generators which are excellent in portability by being lightweight and easy to install.

In order to solve the above problems, a soundproofing device for a portable generator according to the present invention has the following configuration. That is,
A first cover body having an opening on the entire bottom surface and a part of the one side surface and a second cover body for closing the opening on the one side surface from the side;
An accommodation space in which only the bottom surface is opened by the first cover body and the second cover body attached to the first cover body is formed,
The second cover body is provided with a duct for communicating the housing portion with the external space.

In addition to the above configuration, the soundproofing device for a portable generator according to the present invention is:
The first cover body and the second cover body are filled with a filler having a soundproofing effect.

In addition to the above configuration, the soundproofing device for a portable generator according to the present invention is:
The external appearance of the first cover body is formed in a rectangular parallelepiped shape, and the opening and the inner surface provided in the one side surface communicating with the accommodation space are formed in a rectangular shape,
The outer shape of the second cover body or a part of the outer shape is formed in a shape that contacts and closes the inner surface of the opening formed in the rectangle.

  The soundproofing method according to the present invention includes a portable generator mounted on an elastic rubber or resin sheet, the bottom surface being opened, and the whole or a part of the one side surface being provided with an opening. 1 cover body and a second cover body that covers the opening of the one side surface from the side, and only the bottom surface is provided by the first cover body and the second cover body attached to the first cover body. A portable power generator mounted on the rubber or resin sheet by a soundproof device in which a housing space is formed and a duct is provided in the second cover body to communicate the housing portion with the external space. It is characterized by covering the machine.

A soundproofing device for a portable generator according to the present invention includes a first cover body having an opening on the entire bottom surface and a part of the one side surface, and a second cover for closing the opening on the one side surface from the side. Having a cover body of
An accommodation space in which only the bottom surface is opened by the first cover body and the second cover body attached to the first cover body is formed,
The second cover body is provided with a duct for communicating the housing space and the external space, and is attached so that the housing space side opening of the duct is brought into contact with or in close contact with the side surface of the portable generator in which the exhaust portion is disposed. Means is provided.

  In the soundproofing device for a portable generator according to the present invention, almost the entire bottom surface is formed as an opening that communicates with a housing portion of the generator. For this reason, it is possible to exert a soundproofing effect simply by installing the generator so as to cover the installed generator and attaching a cover also serving as an exhaust duct to the side opening. Moreover, since the soundproofing device according to the present invention is not intended to be transported in a state where a heavy portable generator is accommodated, it is not necessary to have the strength and rigidity necessary for that purpose, and is extremely lightweight. Therefore, the soundproofing device itself can be easily transported, and has the effect of being excellent in portability as an accessory of the portable generator.

  In addition to the above-described effect, the soundproofing device according to the present invention includes a second cover body provided with an exhaust passage serving as an exhaust duct on the side surface of the portable generator provided with an exhaust portion that discharges exhaust gas. Attachment means for pulling or pressing is provided. As a result, the present invention has the effect of reducing the leakage of the exhaust gas discharged from the portable generator into the soundproofing device and reducing the occurrence of incomplete combustion due to the intake of the exhaust gas as the supply air. It has become.

It is the external appearance perspective view which represented the soundproof device concerning this Embodiment, and the portable generator accommodated in this soundproof device from diagonally upward. BRIEF DESCRIPTION OF THE DRAWINGS It is an external appearance perspective view which represented the soundproof device concerning this Embodiment and the portable generator accommodated in this soundproof device from diagonally downward. It is the external appearance perspective view which represented the use condition of the soundproofing device which concerns on this Embodiment from diagonally upward. It is the external appearance perspective view which represented the use condition of the soundproofing device which concerns on this Embodiment from diagonally downward. It is center sectional drawing of the longitudinal direction in the use condition of the soundproofing device which concerns on this Embodiment. It is explanatory drawing showing the soundproofing device and portable generator which concern on another Example. It is sectional drawing over the longitudinal direction of the center part of the 1st cover body which the soundproofing apparatus which concerns on another Example has. It is sectional drawing over the longitudinal direction of the center part of the 2nd cover body which the soundproofing apparatus which concerns on another Example has. It is explanatory drawing of the state which attached the adapter part to the portable generator. It is explanatory drawing of the state which attached the adapter part attached to the portable generator to the duct part.

Hereinafter, embodiments for carrying out the invention will be described with reference to the drawings.
FIGS. 1 and 2 are explanatory views showing a sound generator (hereinafter referred to as “soundproof device”) 1 for a portable generator and a portable generator H housed in the soundproof device 1 according to the present embodiment. FIG. 1 shows a state seen from obliquely above, and FIG. 2 shows a state seen from obliquely below. The soundproofing device 1 is composed of a first cover body 4 having an open bottom surface 2 and one side surface, and a second cover body 5 that closes an opening 3 provided on the side surface from the side. In addition to the case where the entire side surface is opened, the opening 3 may be a portion which opens a part of the side surface.
The external shape of the first cover body 4 in the present embodiment is formed in a rectangular parallelepiped shape that is a hexahedron. Specifically, the outer shape is constituted by a plate-like wall member having a predetermined thickness except for the open bottom surface 2 and one side surface which is an end portion in the longitudinal direction continuous from the bottom surface 2. .

  As shown in FIGS. 3 and 4, the second cover body 5 is fitted in the opening 3 formed on the one side surface. FIG. 3 shows a state in which the second cover body 5 is attached to the first cover body 4 as viewed from diagonally above, and FIG. 4 shows a state as viewed from diagonally below. The second cover body 5 has an outer shape or an outer shape portion that is in close contact with the inner surface near the side surface of the first cover body 4. As a result, when the second cover body 5 is mounted, the gap formed between the inner surface of the first cover body 4 and the second cover body 5 is formed to be small.

The left and right side walls 6 and 7 and the upper wall 8 constituting the external appearance of the first cover body 4 are plate-shaped having a thickness of 50 to 60 mm in which a heat insulating material such as glass wool serving as a soundproof material is enclosed. It is comprised by the wall surface member. In addition, when the soundproof material is a sound absorbing material having a higher soundproofing effect, the thickness can be set to about 20 mm. In this case, it goes without saying that the shape of each part is appropriately changed according to the thinning of each wall surface. In addition to glass wool, non-flammable felts and urethane materials can be used as the soundproof material.
A rear wall 10 provided with an air inlet 9 is provided on the side opposite to the side provided with the opening 3.
FIG. 5 is an explanatory view showing only the soundproofing device 1 in a state in which the portable generator H is accommodated in a central sectional view in the longitudinal direction. The air inlet 9 is an opening through which the engine of the portable generator H supplies air necessary for combustion. A passage 12 formed by an inner wall 13 separately provided between the rear wall 10 and the storage chamber (storage space) 11 so that the path from the air inlet 9 to the storage chamber 11 of the portable generator H becomes long. Is formed. The reason why the path from the intake port 9 to the storage chamber 11 is lengthened is to attenuate the noise generated by the portable generator H in the process of passing through the passage 12.

The second cover body 5 is provided with an opening 14 on the side surface of the first cover body 4 facing the storage chamber 11 side in accordance with the position of the exhaust portion of the portable generator. Further, a bent passage 15 is provided inside the second cover body 5, and the opening 14 communicates with an opening (exhaust port) 16 provided on the opposite surface side through the passage 15. The passage 15 constitutes a duct through which the exhaust discharged by the portable generator passes.
The reason why the passage 15 from the opening 14 to the exhaust port 16 is bent is that the exhaust portion of the portable generator and the outside are not communicated in a straight line so that the sound is diffused and absorbed by the wall surface. This is to increase the amount of noise attenuation by increasing the length.

As described above, the soundproofing device 1 functions as the first cover body 4 that substantially covers the entire portable generator H and the silencer that is mounted so as to close the opening 3 formed on the side surface of the first cover body 4. The second cover body 5 is used.
The noise generated by the portable generator H includes vibrations and mechanical sounds generated by the mechanical unit and the power generation unit, explosion sounds generated during combustion generated from the exhaust unit and the intake unit, and the like. These noises can be reduced by covering the whole with a cover. The soundproofing device shown as the prior art covers the entire outer periphery of the generator including the bottom surface, but when the portable generator H is used on a flat ground surface or floor surface, the ground surface or floor surface is also soundproofed. Since it can be regarded as an effective wall surface, a considerable soundproofing effect can be obtained by covering the four sides and the upper surface except the ground surface and the floor surface.

Moreover, when the cover which covers a bottom face is provided in the soundproofing device, the strength which supports the weight of the heavy generator is also required. However, the soundproofing device only needs to cover the portable generator H as long as a substantial soundproofing function is exhibited without providing a cover covering the bottom surface. For this reason, there is no need for strength and rigidity to support a load of several tens of kg.
As described above, there is a considerable soundproofing effect just by covering the outer periphery of the generator. This is because high-frequency sounds that humans feel as noise can be blocked to a considerable extent by passing through walls. That is, if the volume of the frequency region that humans feel sensitively can be reduced, a substantial soundproofing effect can be obtained even if the reduction rate of the noise amount expressed in dB is slight.

The soundproofing device 1 according to the present embodiment can cover the outer peripheral surface excluding the bottom surface of the portable generator H first, thereby performing attenuation due to irregular reflection in the soundproofing device 1 and passage through the wall surface, The generated sound can be prevented from reaching the human body directly without reflection or attenuation. This is an effective means for reducing high-frequency noise that is particularly uncomfortable.
Secondly, since strength and rigidity that support a load of several tens of kg are not required, it can be made lightweight, and thus has a feature of excellent portability. That is, it is very easy to carry to the place where the portable generator H is installed, and the usage method that a soundproof effect can be exhibited by simply covering the portable generator H so as to cover it is also very simple.
Thirdly, since the first cover body 4 and the second cover body 5 can be carried separately, the portability is further improved. Further, even if only one of the first cover body 4 and the second cover body 5 is used, a certain degree of soundproofing effect can be exhibited. Fourth, the second cover body 5 has an outer shape that comes into close contact with the inner wall by being inserted through the opening of the first cover body 4, and has no special mechanism. Can be closed. Since the gap can be eliminated by close contact, sound leakage can be prevented and the soundproofing effect can be enhanced.

  Note that the soundproofing device according to the present embodiment may be configured such that a generator is mounted on a resin sheet (including a plate) formed of rubber or other material and mounted from above. . In this case, the resin sheet formed of rubber or other material is desirably a material having a vibration-proof function. When the soundproofing device is placed on the resin sheet, the clearance between the bottom surface of the soundproofing device 1 and the rubber sheet or plate can be reduced, and sound leakage can be reduced to enhance the soundproofing effect. It has the effect of being able to. This soundproofing method is particularly effective in attenuating low frequencies contained in noise, and can further enhance the noise prevention effect of the soundproofing device itself.

Hereinafter, other embodiments of the present invention will be described. In addition, since the effect regarding the structure same as the structure mentioned above is the same, it demonstrates below focusing on the structure peculiar to a present Example.
FIG. 6 is an explanatory diagram showing the configuration of the soundproofing device 100 according to another embodiment and the portable generator H housed in the soundproofing device 100. The soundproofing device 100 includes a first cover body 104 and a second cover body 105.
FIG. 7 is a cross-sectional view of the center portion of the first cover body 104 in the longitudinal direction. The first cover body 104 has an opening in which the entire bottom surface 102 and one side surface 103 are opened. The opening provided in the side surface 103 is closed by the second cover body 105. In addition to opening the entire side surface, this opening may be a portion of the side surface.

The external shape of the first cover body 104 in the present embodiment is formed in a rectangular parallelepiped shape that is a hexahedron. Specifically, the outer shape is formed by each plate-like wall surface member having a predetermined thickness except for the opened bottom surface 102 and one side surface 103 which is an end portion in the longitudinal direction continuously opened from the bottom surface 102. (Side wall). This structure is the same as that of the soundproofing device 1 described above.
Similar to the above-described example, the left and right side walls 106 and 107 and the upper wall 108 constituting the appearance of the first cover body 104 have a thickness 50 in which a heat insulating material such as glass wool serving as a soundproof material is enclosed (filled). It is comprised by the plate-shaped wall surface member which has thickness of -60 mm. A rear wall 110 provided with an air inlet 109 is provided on the opposite surface of the side surface 103 provided with the opening. An internal space surrounded by these side walls serves as a storage space (a storage chamber for the portable generator H) 111 for storing the portable generator H.

The first cover body 104 is provided with an inner wall 113 that divides a part of the space between the rear wall 110 and the accommodation space 111 so that the path from the air inlet 109 to the accommodation space 111 becomes long. . By this inner wall 113, a passage 112 is formed between the rear wall 110 and the inner wall 113 from the air inlet 109 to the accommodation space 111.
The reason why the passage 112 is provided to lengthen the path from the inlet 109 to the accommodation space 111 is to attenuate the noise generated by the portable generator H in the process of passing through the passage 112. In addition, the description regarding the first cover body 104 is the same as the above-described example.

FIG. 8 is a cross-sectional view of the center portion of the second cover body 105 in the longitudinal direction. The second cover body 105 according to the present embodiment is mainly configured by a duct portion 120 that constitutes an exhaust duct and an adapter portion 130 that is detachably attached to the duct portion 120. The duct 120 mainly constitutes an exhaust passage 121 for exhausting, and the adapter portion 130 has a joint portion 131 serving as an entrance of the exhaust passage 121 formed in accordance with the wall surface shape near the exhaust portion of the portable generator H. It is provided.
The duct part 120 has a cubic outer shape as an example, and is formed so as to be attachable to the inner surface part of the opening 103 of the first cover body 104. In this embodiment, the outer shape of the second cover body 105 is made to enter from the opening 103 of the first cover body 104 so as to be fitted with no gap.
The external shape does not necessarily have to be a cube, and other shapes may be used as long as it is appropriate in light of the gist of the present invention.

A bent exhaust passage 121 is provided in the duct portion 120. One end of the exhaust passage 121 is an opening 122 on the housing space 111 side communicating with the joint 131, and the other end is an exhaust port 123 that discharges exhaust gas to the external space. The exhaust passage 121 is bent in the duct portion 120 so that the passage from the opening 122 to the exhaust port 123 does not communicate in a straight line.
The reason why the path (exhaust passage 121) from the opening 122 to the exhaust port 123 is bent is to prevent the exhaust portion of the portable generator H, which is a main noise generation source, from communicating linearly with the external space. By bending the inside of the exhaust passage 121, the exhaust sound is diffused and absorbed by the inner wall surface to attenuate the noise.
A portion surrounding the exhaust passage 121 of the duct portion 120 is mainly formed of a noise buffer material such as a heat insulating material.

The adapter part 130 is arrange | positioned between the duct part 120 and the portable generator H, is formed according to the shape and structure of a portable generator, and is detachably mounted | worn with it.
The joining part 131 of the adapter part 130 is formed according to the shape of the side wall surface near the exhaust part of the portable generator H. The joint 131 is a part intended to guide the exhaust discharged from the portable generator H to the exhaust passage 121 of the duct part 120 without leaking as much as possible. For this reason, the shape of the joining part 131 is made into a shape corresponding to the portable generator H, formed so as to be deformable according to the shape of the side wall surface, or a material provided with flexibility at the contacted part in order to increase the degree of adhesion. Various structures, such as using, are adopted.
Exhaust gas taken in from the joint portion 131 flows into the opening 122 on the housing space 111 side of the duct portion 120 as it is, and is guided to the exhaust port 123 through the exhaust passage 121.

The adapter portion 130 shown in the present embodiment has a plate-like mounting plate 132 that can be mounted on the wall surface of the duct portion 120, and forms an opening 133 that penetrates the front and back of the mounting plate 132, and around the opening 133. A joint 131 with a cylindrical side wall 134 is provided. In this embodiment, the adapter portion 130 is fixed to the duct portion 120 with a plurality of screws, but any fixing means may be used.
In addition, when the position of the opening 122 of the exhaust passage 121 provided in the exhaust portion of the portable generator H and the duct portion 120 is greatly different in the height direction and the width direction, a passage is provided inside instead of the mounting plate 132. The connecting part 131 and the opening 122 of the duct part 120 are connected by a passage formed inside.

In addition, the adapter unit 130 is provided with attachment means for bringing the joint 131 into close contact with the portable generator H. FIG. 9 and FIG. 10 are explanatory diagrams showing how the joint 131 and the portable generator H are coupled using the attaching means.
In the case of the present embodiment, this attachment means is constituted by a stretchable belt 136a (136b) provided with hooks 135 at both ends, and a locking means 137 having a hole for attaching the hook 135 provided around the joint portion 131. The This attachment means is configured as a pulling means for pulling the belts 136a, 136b on the handle or body of the portable generator and pulling the belt 136a, 136b in the direction of the joint portion 131.
Such traction means may have various structures, but various methods may be used without departing from the spirit of the attachment means.

In the illustrated example, a relatively short belt 136a that is engaged with a conveyance handle provided on the upper surface of the portable generator H and a long belt 136b that is hung on the outer periphery of the body of the portable generator H are shown. However, it is not necessary to use these two types of belts at the same time. Usually, the optimum belt is selected and used. Of course, you may use two simultaneously. Further, these belts are not limited to those shown in the form and structure, such as being configured so that the length can be adjusted, in addition to the case where they are prepared according to the shape and size of the portable generator H.
As described above, in this embodiment, a method of pulling the portable generator H by the belt is adopted as a simple method of the attaching means. However, instead of this method, the portable generator H is pressed against the adapter unit 130 by another method. You may provide the press means comprised in.

In addition, a plate-like mounting table 138 on which a part of the portable generator H is mounted as a means for engaging with the portable generator H is provided at the lower end portion of the adapter unit 130 so as to face in a substantially perpendicular direction. When the portable generator H is mounted on the mounting table 138, the upward movement of the adapter unit 130 (second cover body 105) including the duct unit 120 is restricted. Further, since the soundproofing device 100 is used by being placed on the floor, the second cover body 105 does not move downward as a matter of course. As a result, the second cover body 105 is restricted (substantially fixed) in the vertical and horizontal directions with respect to the portable generator H. In addition to this, it is possible to firmly fix the adapter unit 130 to the portable generator by using the attachment means using the pulling means such as the belt as described above.
The mounting table 138 as the engaging means is formed as a plate fixed to the adapter unit 130. However, if it can be engaged with a part of the portable generator H, a movable mechanism is involved. Other forms are also acceptable. For example, the mounting table 138 may be rotatably attached to the adapter unit 130 so that it can be accommodated compactly when not in use.
Moreover, you may provide the wall-like edge part with the low height which bent this edge part and started up toward the front-end | tip and periphery of the mounting base 138 which protruded to the portable generator H side. When such an edge portion is formed, the strength of the mounting table 138 can be increased. When the portable generator has a foot protruding from the bottom surface, the movement of the mounting table 138 relative to the portable generator can be suppressed by engaging the foot with the edge. The positional relationship between the portable generator and the second cover body can be appropriately maintained.

  The soundproofing device 100 according to the present embodiment described above is attached so that the portable generator H is first brought into close contact with the opening 122 that is the entrance of the exhaust passage 121 of the second cover body with pulling or pressing. It has the means. By having such attachment means, it is possible to reduce the leakage of the exhaust discharged from the portable generator H into the soundproofing device 100 and to reduce the occurrence of incomplete combustion due to the intake of the exhaust gas as the supply air. It has become a thing.

Moreover, the soundproofing device 100 according to the present embodiment has an engaging means such as a mounting table that can be engaged with a part of the portable generator H. Since this engaging means can restrict the movement in the vertical direction and the left and right direction (left and right side wall directions) with respect to the portable generator H, it is against the opening 122 that is the entrance of the exhaust passage 121 of the second cover body. The position of the exhaust part of the portable generator H can be substantially fixed. As a result, exhaust leakage into the soundproof device 100 can be reduced, and the occurrence of incomplete combustion due to intake of exhaust gas as supply air can be reduced.

Furthermore, when both the attaching means and the engaging means are used, the second cover body 105 can be fixed to the portable generator H by the forces acting in the horizontal direction, the up-down direction, and the left-right direction. it can. As a result, exhaust leakage into the soundproof device 100 can be further reduced, and the occurrence of incomplete combustion due to intake of exhaust gas as supply air can be reduced.

Moreover, the 2nd cover body has a structure which mounts | wears with the duct part 120 and the adapter part 130 which can be fixed to the portable generator H so that attachment or detachment is possible. As shown in FIG. 9, the portable generator H is fixed to the adapter unit 130 in advance, and when the portable generator H is operated, the adapter unit 130 is attached to the duct unit 120 as shown in FIG. It can also be used by attaching the generator H and using it.
Moreover, the adapter part 130 is prepared according to the shape of the portable generator H of various forms provided by each manufacturer, so that the other duct part 120 and the first cover body can be obtained by replacing only the adapter part 130. 104 can be used as a common product.

  The present invention is applicable to a soundproofing device for a portable generator.

DESCRIPTION OF SYMBOLS 1 Soundproofing device 2 Bottom face 3 Opening 4 1st cover body 5 2nd cover body 6 Right side wall 7 Left side wall 8 Upper wall 9 Air inlet 10 Rear wall 11 Storage chamber 12 Passage 13 Inner wall 14 Opening 15 Passage (duct)
16 Opening (exhaust port)
DESCRIPTION OF SYMBOLS 100 Soundproofing device 102 Bottom surface 103 Side surface 104 First cover body 105 Second cover body 106, 107 Left and right side walls 108 Upper wall 109 Inlet 110 Rear wall 111 Accommodating space 112 Path 113 Inner wall 120 Duct section 121 Exhaust path
122 opening 123 exhaust port 130 adapter part 131 joint part 132 mounting plate 133 opening 134 side wall 135 hook 136a (136b) belt 137 locking means 138 mounting base H portable generator

Claims (7)

A first cover body having an opening on the entire bottom surface and a part of one side surface, and a second cover body in which the outer shape or a part of the outer shape is in close contact with the inner surface of the opening to close the opening. Have
An accommodation space in which only the bottom surface is opened by the first cover body and the second cover body attached to the first cover body is formed,
An engaging means for placing a part of the portable generator on the lower end of the second cover body, and a duct for communicating the housing space having an exhaust passage bent inside the second cover body with the external space Provided ,
A soundproofing device for a portable generator , wherein a portion surrounding the exhaust passage is formed of a noise buffer material, and an opening leading to the exhaust passage is provided in accordance with the position of the exhaust portion of the portable generator.   The soundproofing device for a portable generator according to claim 1, wherein a filler having a soundproofing effect is enclosed in the first cover body and the second cover body. The external appearance of the first cover body is formed in a rectangular parallelepiped shape, and the opening and the inner surface provided in the one side surface communicating with the accommodation space are formed in a rectangular shape,
The soundproofing for a portable generator according to claim 1 or 2, wherein the outer shape or a part of the outer shape of the second cover body is formed so as to be in contact with an inner surface of the rectangular opening. apparatus. A first cover body having an opening on the entire bottom surface and a part of one side surface, and a second cover body that closes the opening by bringing the outer shape or a part of the outer shape into contact with the inner surface of the opening; , Provide a sheet of elastic rubber or resin,
The first cover body and the second cover body attached to the first cover body form an accommodation space whose bottom surface is opened, and a part of the portable generator is formed at the lower end of the second cover body. And a duct for communicating the housing space having the bent exhaust passage inside the second cover body and the external space, and a portion surrounding the exhaust passage is formed of a noise buffer material. In addition, an opening leading to the exhaust passage is provided in accordance with the position of the exhaust portion of the portable generator,
While placing a part of the portable generator on the elastic rubber or resin sheet on the engaging means provided at the lower end of the second cover body,
A portable generator characterized in that the portable generator is covered with an inner surface of the opening provided on one side surface of the first cover body in contact with an outer shape or a part of the outer shape of the second cover body. Soundproofing method. A first cover body having an opening on the entire bottom surface and a part of the one side surface and a second cover body for closing the opening on the one side surface from the side;
An accommodation space in which only the bottom surface is opened by the first cover body and the second cover body attached to the first cover body is formed,
The second cover body is provided with a duct that allows the housing space and the external space to communicate with each other, and the housing space side opening of the duct is brought into contact with or in close contact with the side wall surface of the portable generator in which the exhaust portion is disposed. is intended attachment means digits set,
The soundproofing device for a portable generator , wherein the attachment means is a traction means for attracting the housing space side opening of the duct to a side wall surface of the portable generator in which an exhaust portion is arranged . A first cover body having an opening on the entire bottom surface and a part of the one side surface and a second cover body for closing the opening on the one side surface from the side;
Engaging means with the portable generator is provided at the lower end of the second cover body, and only the bottom surface is covered by the first cover body and the second cover body attached to the first cover body. Forming an open storage space,
The second cover body is provided with a duct that allows the housing space and the external space to communicate with each other, and the housing space side opening of the duct is brought into contact with or in close contact with the side wall surface of the portable generator in which the exhaust portion is disposed. A soundproofing device for a portable generator, characterized in that an attaching means is provided. The soundproofing device for a portable generator according to claim 6 , wherein the engaging means with the portable generator is a mounting table on which a part of the portable generator is mounted.

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