JP7761264B2 - soundproof box - Google Patents

Description

The present invention relates to a soundproof box that suppresses noise from small generators.

Various soundproofing boxes have been developed to suppress noise from small generators.

Small generators generate electricity by burning gasoline to run an engine, which inevitably results in hot exhaust gas being blown out in a specific direction.

Conventional soundproofing boxes are equipped with a barrier to prevent exhaust gas from being blown out. The barrier prevents exhaust gas from traveling in the direction of blowing out, and the gas passes through a designated exhaust gas flow passage before being discharged to the outside (see, for example, Patent Document 1).

However, with a soundproof box of this configuration, exhaust gases are unable to flow properly through the designated exhaust gas flow passages, making it difficult for them to be smoothly discharged to the outside.

As a result, in conventional soundproof boxes, the interior space becomes overheated due to the high-temperature exhaust gas filling it, which can lead to various problems, such as making it impossible to carry the box by hand, or causing the walls that make up the soundproof box to be destroyed or deformed.

It is clear that if the soundproof box is additionally equipped with power-consuming equipment such as an air intake or exhaust fan, the high-temperature exhaust gas can be efficiently discharged to the outside. However, if the soundproof box is equipped with power-consuming equipment such as an air intake or exhaust fan, this is inherently undesirable as it wastes the generator's power. In addition, this can cause another problem: the soundproof box as a whole becomes too heavy, making it difficult to transport.

Patent No. 5591781

The present invention was made in response to the above-mentioned circumstances, and aims to provide a soundproof box that is designed to prevent excessive filling of the interior with high-temperature exhaust gases emitted from a generator, without relying on power-consuming equipment such as air intake or exhaust fans.

In other words, the present invention has the following configuration:

The invention described in claim 1 is a soundproof box comprising a box body having a bottom wall, a peripheral wall erected from the peripheral edge of the bottom wall, and a top wall disposed on top of the peripheral wall, and capable of accommodating a portable generator driven by an engine in the accommodation space of the box body, wherein a partition is provided to separate a first space portion constituting the accommodation space and facing an air intake portion of the generator from a second space portion constituting the accommodation space and facing an exhaust gas exhaust portion of the generator, and the peripheral wall facing the second space portion is provided with a partition wall to separate the exhaust gas exhaust portion from the first space portion. an exhaust outlet hole capable of discharging the exhaust gas discharged from the second space portion to an external space; a temperature rise suppression means capable of suppressing a temperature rise in the second space portion is disposed in the second space portion; the temperature rise suppression means has an exhaust gas passage through which the exhaust gas can pass, a base end connection part connected to the exhaust gas discharge portion so as to be able to introduce the exhaust gas into the exhaust gas passage, and a tip end opening part capable of discharging the exhaust gas that has passed through the exhaust gas passage; The box body is configured to be located near the air outlet hole , and the box body comprises a lower box component that is open upward and an upper box component that is open downward and is supported by the lower box component, the lower box component having a rectangular shape and comprising the bottom wall on which the generator is placed, and a lower peripheral wall that constitutes a part of the peripheral wall and is erected integrally from the peripheral edge of the bottom wall, and the upper box component comprises the top wall that is approximately the same size as the bottom wall, and a lower peripheral wall that constitutes a part of the peripheral wall and is erected integrally from the peripheral edge of the top wall. and an upper peripheral wall whose lower edge abuts against the upper edge of the lower peripheral wall, one end of the lower peripheral wall of the lower box component and one end of the upper peripheral wall of the upper box component are connected via a hinge, and the lower box component and the upper box component are each configured to be able to assume an open position, and the vertical dimension of the upper peripheral wall of the upper box component is set larger than the vertical dimension of the lower peripheral wall of the lower box component .

The invention described in claim 2 is the soundproof box described in claim 1, in which the temperature rise suppression means includes an exhaust silencer for suppressing noise that may occur in the exhaust gas discharge section.

The invention described in claim 3 is the soundproof box described in claim 1 or 2, in which the temperature rise suppression means is equipped with a flow promotion mechanism that promotes the flow of the exhaust gas discharged from the tip opening.

The invention described in claim 4 is the soundproof box described in claim 1, in which the temperature rise suppression means includes an exhaust silencer on the upstream side for suppressing noise that may be generated in the exhaust gas discharge section, and a flow promotion mechanism on the downstream side for promoting the flow of the exhaust gas discharged from the tip opening, and the exhaust gas passage is arranged to align with the respective axes of the exhaust silencer and the flow promotion mechanism.

The invention described in claim 5 is a soundproof box described in claim 1, 2, 3 or 4, in which the peripheral wall facing the first space portion is provided with an external air inlet hole that can connect the external space and the first space portion.

The invention described in claim 6 is a soundproof box described in claims 1, 2, 3, 4 or 5, wherein the bottom wall, the peripheral wall, the top wall and the partition wall are constructed to include lightweight rigid plastic plates.

As explained above, the present invention makes it possible to provide a soundproof box that is designed to prevent excessive filling of the interior with high-temperature exhaust gases emitted from a generator, without relying on power-consuming equipment such as air intake or exhaust fans.

1 is a perspective view showing an embodiment of the present invention; FIG. FIG. FIG. FIG. FIG. 7 is a schematic cross-sectional view taken along line XX in FIG. 6. 7 is a schematic end view taken along line YY in FIG. 6. FIG. 6 is a schematic end view corresponding to line ZZ in FIG. 5 .

One embodiment of the present invention will be described below with reference to Figures 1 to 9.

In this embodiment, the present invention is applied to a portable soundproof box that is primarily used outdoors.

The soundproof box comprises a box body K having a bottom wall 1, a peripheral wall E erected from the peripheral edge of the bottom wall 1, and a top wall 5 disposed above the peripheral wall E. The soundproof box is configured so that a portable generator G driven by an engine can be housed inside the box body K, i.e., in the storage space S.

The generator G is of a known configuration that burns gasoline to operate an engine and generate electricity. Therefore, detailed descriptions of the generator G will be omitted, and a schematic representation is shown in the figures. The soundproof box of this embodiment employs a generator G with an air intake section g1 at the front end and an exhaust gas discharge section g2 at the rear end. Adjacent to the exhaust gas discharge section g2 is a warm air discharge section g4, which discharges warm air after cooling the engine using an internal fan (not shown).

The soundproof box is provided with a partition wall C that separates a first space portion s1, which forms the storage space S and faces the air intake portion g1 of the generator G, from a second space portion s2, which forms the storage space S and faces the exhaust gas discharge portion g2 of the generator G.

The bottom wall 1, peripheral wall E, top wall 5, and partition wall C can be made of a variety of materials with excellent heat resistance and soundproofing properties. The bottom wall 1, peripheral wall E, top wall 5, and partition wall C can be made of a material that contributes to weight reduction while ensuring a certain level of rigidity, for example, a lightweight, rigid plastic plate.

In this embodiment, the soundproof box is provided with an exhaust outlet hole J in the rear wall 3 of the peripheral wall E facing the second space portion s2, which allows exhaust gas discharged from the exhaust gas discharge section g2 of the generator G to be discharged to the outside space. Furthermore, a temperature rise suppression means N is disposed in the second space portion s2, which can suppress a temperature rise in the second space portion s2.

The soundproof box in this embodiment is described in detail below.

<<Soundproof box body K>>
The soundproof box body K is a trunk box-like body having a lower box component A that opens upward and an upper box component D that opens downward and is supported by the lower box component A.

The soundproof box body K is designed to accommodate a portable engine-driven generator G in the internal storage space S formed by the lower box component A and the upper box component D.

The soundproof box body K is configured to be able to take two positions: a basic position (L) in which the upper box component D is supported by the lower box component A, closing the storage space S, and an open position (M) in which the lower box component A and the upper box component D are each placed on a support surface such as the ground, opening the internal space.

The storage space S of the soundproof box body K is separated by a partition C into a first space portion s1 located at the front and a second space portion s2 located at the rear. In other words, in the basic position (L), the storage space S of the soundproof box body K is separated almost seamlessly by the partition C and the auxiliary partition CH, which can close gaps, into the first space portion s1, where the air intake portion g1 of the generator G and the gasoline tank (not shown) are located, and the second space portion s2, where the exhaust gas discharge portion g2 of the generator G is located.

First, we will explain the lower box component A that makes up the soundproof box body K.

<<Lower box component A>>
The lower box component A is rectangular, i.e., a rectangular shape extending in the front-to-rear direction, and comprises a bottom wall 1 on which the generator G is placed, a lower peripheral wall B which forms part of the peripheral wall E and is erected integrally from the peripheral portion of the bottom wall 1, i.e., the front edge, rear edge, and left and right side edges, and a partition wall C which is erected in the middle of the front-to-rear direction of the bottom wall 1 so as to separate a first space portion s1 which forms the storage space S and in which the air intake portion g1 of the generator G is located, from a second space portion s2 which forms the storage space S and in which the exhaust gas discharge portion g2 of the generator G is located.

<Bottom wall 1>
The bottom wall 1 is a rectangular plate located below the generator G. The bottom wall 1 is a plate having a certain degree of rigidity, and can be made by stacking one or more hollow plastic plates, for example.

That is, the bottom wall 1 can be made of a plastic hollow board (bubble board) with sound-absorbing properties, as disclosed in, for example, Patent No. 6478471. Similarly, the other walls, namely the peripheral wall E, the top wall 5, the partition wall C, and the support wall W, can also be made of a plastic hollow board (bubble board) with sound-absorbing properties.

The bottom wall 1 is formed with a fitting hole 11 for preventing slippage to avoid the legs (not shown) provided at the lower end of the generator G.

The generator G is fastened to the bottom wall 1 by a fastening means such as a belt (not shown). If necessary, the bottom wall 1 may be formed with a notched hole or cutout (not shown) for positioning the fastening means such as a belt.

The bottom wall 1 can, of course, be configured in any suitable manner. For example, it may be made of a plurality of hollow plastic plates with plate-shaped insulating foam material, vibration-proof sheets, glass wool, etc., interposed between them, or the hollow plastic plates may be replaced with insulating foam material, vibration-proof sheets, glass wool, etc.

Of course, the bottom wall 1 may also be provided with sound-absorbing materials, cushioning materials, heat insulating materials, or positioning members that engage with the generator G, separate from those described above.

The inner surface of the rear part of the bottom wall 1 faces the second space portion s2, which is likely to become hot due to the exhaust gas discharged from the exhaust gas discharge portion g2 of the generator G, so the inner surface may be aluminum laminated.

A partition wall C is erected at the rear of the bottom wall 1. Partition wall C will be described in more detail later.

<Lower peripheral wall B>
The lower peripheral wall B constitutes the lower part of the peripheral wall E. The lower peripheral wall B includes a lower front wall portion 21 extending upward from the front edge of the bottom wall 1 in a direction perpendicular to the bottom wall 1, a lower rear wall portion 31 extending upward from the rear edge of the bottom wall 1 in a direction perpendicular to the bottom wall 1, and left and right lower wall portions 41 extending upward from the left and right side edges of the bottom wall 1 in a direction perpendicular to the bottom wall 1.

<Lower front wall portion 21 (lower peripheral wall B)>
The lower front wall portion 21 constitutes the front wall 2 and is a rectangular plate located in front of the generator G. The lower front wall portion 21 is a plate-like portion having a certain degree of rigidity, and can be made of, for example, one or more laminated hollow plastic plates. Needless to say, the configuration of the lower front wall portion 21 can be any suitable configuration.

A wiring outlet hole P is provided in the center of the lower front wall 21 of the lower box component A in the left-right direction, through which wiring such as a power cord (not shown) connected to the generator G can be pulled out in order to use the electricity generated by the generator G.

<Lower rear wall portion 31 (lower peripheral wall B)>
The lower rear wall 31 constitutes the rear wall 3 and is a rectangular plate located behind the generator G. The lower rear wall 31 is a plate with a certain degree of rigidity, and can be made of, for example, one or more laminated hollow plastic plates. Needless to say, the configuration of the lower rear wall 31 can be any suitable configuration.

The inner surface of the lower rear wall portion 31 faces the second space portion s2, which is likely to become hot due to the exhaust gas discharged from the exhaust gas discharge portion g2 of the generator G, so the inner surface may be aluminum laminated.

<Lower side wall portion 41 (lower peripheral wall B)>
The lower wall portions 41 constitute the side walls 4 and are rectangular plates located on both the left and right sides of the generator G. The lower wall portions 41 are plate-shaped with a certain degree of rigidity, and may be made of, for example, one or more laminated hollow plastic plates. Needless to say, the configuration of the lower wall portions 41 may be any suitable configuration.

The lower wall portion 41 has a portion facing the second space portion s2, which is likely to become hot due to the exhaust gas discharged from the exhaust gas discharge portion g2 of the generator G, so the inner surface of this portion may be aluminum laminated.

The bottom wall 1, lower front wall portion 21, lower rear wall portion 31, and lower side wall portion 41 are integrated using an aluminum frame I, which serves as a connecting member.

<Partition wall C>
The partition C is a wall extending in the vertical direction so as to serve as the main separating portion between a first space portion s1, which is the space in which the air intake portion g1 of the generator G is located, and a second space portion s2, which is the space in which the exhaust gas discharge portion g2 of the generator G is located.

Bulkhead C is erected so as to avoid the exhaust gas discharge section g2 of the generator G mounted on bottom wall 1 and the warm air discharge section g4, which discharges warm air after cooling the engine.

More specifically, the partition wall C has a generally rectangular communication hole c1 formed in the center in the vertical and horizontal directions. The exhaust gas discharge section g2 and warm air discharge section g4 of the generator G are configured to face the second space portion s2 through the communication hole c1 of the partition wall C.

A cushioning sealant SL is provided on the peripheral edge of the communication hole c1 of the partition C on the generator G side to prevent a gap from forming between the partition C and the generator G.

The left and right sides of the partition C are connected to left and right support walls W erected on the bottom wall 1. The left and right support walls W extend in a direction approximately perpendicular to the partition C, i.e., in the front-to-rear direction. The left and right support walls W are fan-shaped to avoid interference with the upper box component D, which opens and closes via the damper hinge H.

The left and right sides of the partition C are connected to the front ends of the left and right support walls W. The partition C is supported by the left and right support walls W and is held in a position slightly tilted forward toward the generator G. The partition C is tilted forward toward the generator G so that the exhaust gas discharge section g2 and warm air discharge section g4 of the generator G can be appropriately positioned relative to the communication hole c1 of the partition C.

The partition wall C and support wall W are plate-shaped with a certain degree of rigidity, and can be made, for example, of a single or multiple laminated hollow plastic plates.

It goes without saying that the partition walls C and support walls W can be configured in any suitable manner. For example, insulating foam material, vibration-damping sheets, glass wool, etc., may be placed between multiple plastic hollow plates, or insulating foam material, vibration-damping sheets, glass wool, etc. may be used instead of plastic hollow plates.

Of course, the partition walls C and support walls W may also be provided with sound-absorbing materials, cushioning materials, heat insulating materials, or positioning members that engage with the generator G, separate from those described above.

The partition wall C and the support wall W have portions facing the second space portion s2, which is likely to become hot due to the exhaust gas discharged from the exhaust gas discharge section g2 of the generator G, so the inner surface of this portion may be coated with aluminum laminate.

When the soundproof box body K is in the basic position (L), an auxiliary partition CH made of insulating foam material and having cushioning properties is interposed between the partition C and the top wall 5.

The auxiliary partition CH is located between the upper edge of the partition C and the underside of the top wall 5, minimizing the occurrence of gaps and effectively separating the first space portion s1 from the second space portion s2. In this embodiment, the auxiliary partition CH is attached to the underside of the top wall 5.

Next, we will explain the upper box component D that makes up the soundproof box. The upper box component D is shaped like a downward-facing box and can function as an upper lid that can close the lower box component A.

<<Upper box component D>>
The upper box component D is provided with a top wall 5 that is rectangular, i.e., elongated in the front-to-back direction, and is approximately the same size as the bottom wall 1, and an upper peripheral wall F that forms part of the peripheral wall E and is integrally hung down from the peripheral portions of the top wall 5, i.e., the front edge, rear edge, and left and right side edges, with its lower edge fe abutting against the upper edge be of the lower peripheral wall B.

<Ceiling wall 5>
The top wall 5 is a rectangular plate located above the generator G. The top wall 5 is a plate with a certain degree of rigidity, and can be made of, for example, a single or multiple laminated hollow plastic plates. It goes without saying that the top wall 5 can be configured in any suitable manner.

A handle T is provided on the top wall 5 at approximately the center in the left-right and front-to-back directions, which is used when moving the soundproof box.

On the underside of the top wall 5, there is provided an auxiliary partition CH made of insulating foam material that cooperates with the partition C to separate the first space portion s1 from the second space portion s2.

<Upper peripheral wall F>
The upper peripheral wall F constitutes the upper portion of the peripheral wall E. The upper peripheral wall F includes an upper front wall portion 22 extending downward from the front edge of the top wall 5 in a direction perpendicular to the top wall 5, an upper rear wall portion 32 extending downward from the rear edge of the top wall 5 in a direction perpendicular to the top wall 5, and left and right upper wall portions 42 extending upward from the left and right side edges of the top wall 5 in a direction perpendicular to the top wall 5.

<Upper front wall portion 22 (upper peripheral wall F)>
The upper front wall portion 22 constitutes the front wall 2 and is a rectangular plate located in front of the generator G. The upper front wall portion 22 is a plate-like portion having a certain degree of rigidity, and can be made of, for example, one or more laminated hollow plastic plates. It goes without saying that the upper front wall portion 22 can be configured in any suitable manner.

<Upper rear wall portion 32 (upper peripheral wall F)>
The upper rear wall 32 constitutes the rear wall 3 and is a rectangular plate located behind the generator G. The upper rear wall 32 is a plate with a certain degree of rigidity, and can be made of, for example, one or more laminated hollow plastic plates. It goes without saying that the upper rear wall 32 can be configured in any suitable manner.

The inner surface of the upper rear wall portion 32 faces the second space portion s2, which is likely to become hot due to the exhaust gas discharged from the exhaust gas discharge portion g2 of the generator G, so the inner surface may be aluminum laminated.

An exhaust outlet hole J is provided in the center of the upper rear wall 32 in the left-right direction, allowing exhaust gas discharged from the exhaust gas discharge section g2 of the generator G to be discharged to the outside space. The exhaust outlet hole J is generally rectangular in shape.

<Upper side wall portion 42 (upper peripheral wall F)>
The upper wall portions 42 are rectangular plates located on both the left and right sides of the generator G. The upper wall portions 42 are plate-shaped with a certain degree of rigidity, and may be made of, for example, one or more laminated hollow plastic plates. Needless to say, the upper wall portions 42 may be configured in any suitable manner.

The upper wall portion 42 has a portion facing the second space portion s2, which is likely to become hot due to the exhaust gas discharged from the exhaust gas discharge portion g2 of the generator G, so the inner surface of this portion may be aluminum laminated.

An external air inlet hole U is provided in the upper wall portion 42 facing the first space portion s1, allowing air from the external space to be introduced into the interior. The external air inlet hole U is approximately rectangular and is provided in each of the left and right upper wall portions 42.

The above-mentioned top wall 5, upper front wall portion 22, upper rear wall portion 32, and upper side wall portion 42 are integrated using an aluminum frame I, which serves as a connecting member.

One end of the lower peripheral wall B of the lower box component A, i.e., the upper end of the lower front wall 21, and one end of the upper peripheral wall F of the upper box component D, i.e., the lower end of the upper front wall 22, are connected via a damper hinge H. In other words, the upper box component D is supported rotatably relative to the lower box component A so that the storage space S can be opened and closed.

Furthermore, as shown in Figure 2, the box body K of this embodiment is configured so that the lower box component A and the upper box component D can each assume an open position (M) in which their upper and front sides are open, making it easier to set up the generator G.

In addition, the upper box component D of the soundproof box can be locked to the lower box component A in the basic position (L) with a lock.

<<Temperature Rise Suppression Means N>>
The temperature rise suppression means N is made up of multiple cylindrical members of different diameters connected together with their axial centers js aligned. The temperature rise suppression means N has an exhaust gas passage tw inside through which exhaust gas can pass. The temperature rise suppression means N is attached to the generator G and disposed in the second space portion s2 of the box body K.

The temperature rise suppression means N is associated with the exhaust gas discharge section g2, which has a particular effect on the temperature rise in the second spatial portion s2, of the exhaust gas discharge section g2 and warm air discharge section g4 in the generator G, and is configured to actively discharge high-temperature exhaust gas to the outside through the exhaust outlet hole J.

In this embodiment, the temperature rise suppression means N is equipped with an exhaust silencer Q for suppressing noise that may occur in the exhaust gas discharge section g2, and is also equipped with a flow promotion mechanism R for promoting the flow of exhaust gas discharged from the tip opening n2.
The exhaust gas passage tw is provided so as to coincide with the axis js of the exhaust silencer Q and the flow promoting mechanism R.

The temperature rise suppression means N has a base end connection portion n1 connected to the exhaust gas discharge portion g2 so that exhaust gas from the generator G can be introduced into the exhaust gas passage tw, and has a tip opening n2 through which exhaust gas that has passed through the exhaust gas passage tw can be discharged.

The base end connection portion n1 is provided on a cylindrical metal base end pipe material v1. The base end connection portion n1 is sized so that it can fit inside the exhaust gas discharge portion g2 formed in the generator G.

The tip opening n2 is provided on a cylindrical metal tip pipe material v2. The tip opening n2 is positioned near the exhaust outlet hole J in the box body K.

In order to prevent the high-temperature exhaust gas emitted from the generator G from accumulating in the second spatial portion s2, it is desirable to position the tip opening n2 at a distance of 10 cm or less from the exhaust outlet hole J. In this embodiment, the tip opening n2 of the temperature rise suppression means N is set to be positioned at a distance of 5 cm or less from the exhaust outlet hole J of the soundproof box K.

<Exhaust silencer Q>
The exhaust silencer Q comprises a metal case body q1 connected to the rear of a base pipe material v1 extending in the fore-and-aft direction with its axis js aligned, and glass wool q2, a non-flammable fiber material, arranged inside the case body q1.

The case body q1 comprises a cylindrical portion q11 that has a larger diameter than the base end pipe material v1 and extends in the front-to-rear direction, a front end surface portion q12 that is located at the front end of the cylindrical portion q11 and closes the portion located outside the base end pipe material v1, and a rear end surface portion q13 that is located at the rear end of the cylindrical portion q11 and closes the portion located outside the intermediate pipe material v3. Inside the case body q1, a coil spring material q3 is disposed, connecting the base end pipe material v1 and the intermediate pipe material v3.

<Flow promoting means R>
The flow promoting means R is disposed downstream of the exhaust silencer Q.

The flow promotion mechanism R includes an intermediate pipe material v3 having a smaller diameter than the case body q1 and connected to the rear of the case body q1 with its axis js aligned; a tip pipe material v2 having a larger diameter than the intermediate pipe material v3 and arranged at the rear of the intermediate pipe material v3 with its axis js aligned; and a screw member nj serving as a connecting mechanism that connects the intermediate pipe material v3 and the tip pipe material v2 while forming an air flow passage rt between the tip end portion of the intermediate pipe material v3 and the rear end portion of the tip pipe material v2.

The tip opening n2 of the tip pipe member v2 is set to be located downstream of the tip opening v31 of the intermediate pipe member v3. Furthermore, the rear end opening v21 of the tip pipe member v2 is open to the second spatial portion s2.

The flow promoting means R is designed to circulate air in the second spatial portion s2 from the rear end opening v21 through the air flow passage rt to the front end opening n2 in accordance with the direction of travel of exhaust gas flowing through the exhaust gas passage tw. This allows the flow of exhaust gas to be assisted by the air flowing through the air flow passage rt, making it easier for the exhaust gas to be discharged to the outside through the front end opening n2.

As explained above, the soundproof box according to this embodiment comprises a box body K having a bottom wall 1, a peripheral wall E extending from the peripheral edge of the bottom wall 1, and a top wall 5 disposed above the peripheral wall E.

The soundproof box is designed to accommodate a portable engine-driven generator G in the storage space S of the box body K. A partition wall C is provided in the soundproof box to separate a first space portion s1, which constitutes the storage space S and faces the air intake portion g1 of the generator G, from a second space portion s2, which constitutes the storage space S and faces the exhaust gas discharge portion g2 of the generator G.

The peripheral wall E facing the second spatial portion s2 is provided with an exhaust outlet hole J that can discharge exhaust gas discharged from the exhaust gas discharge portion g2 to the external space, and a temperature rise suppression means N is disposed in the second spatial portion s2 to suppress a temperature rise in the second spatial portion s2.

The temperature rise suppression means N is provided with an exhaust gas passage tw through which exhaust gas can pass, has a base end connection portion n1 connected to the exhaust gas discharge portion g2 so that exhaust gas can be introduced into the exhaust gas passage tw, and has a tip opening n2 through which exhaust gas that has passed through the exhaust gas passage tw can be discharged, and the tip opening n2 is set to be located near the exhaust outlet hole J.

For this reason, this embodiment makes it possible to provide a soundproof box that is configured to prevent excessive filling of the interior with high-temperature exhaust gases emitted from the generator G, without relying on power-consuming equipment such as air intake or exhaust fans, i.e., without installing power-consuming equipment such as air intake or exhaust fans.

In other words, because the tip opening n2 of the temperature rise suppression means N is located near the exhaust outlet hole J provided in the soundproof box body K, it is possible to minimize the accumulation of extremely hot exhaust gas within the soundproof box body K.

The temperature rise suppression means N is equipped with an exhaust silencer Q to suppress noise that may occur in the exhaust gas discharge section g2.

For this reason, even if the tip opening n2 is located near the exhaust outlet hole J, the original purpose of the soundproof box, namely, to adequately prevent noise generated by the generator G, is not compromised.

The temperature rise suppression means N is equipped with a flow promotion mechanism R that promotes the flow of exhaust gas discharged from the tip opening n2.

This encourages high-temperature exhaust gas to be expelled to the outside through the exhaust outlet hole J, effectively preventing the temperature inside the soundproof box from rising too high.

The temperature rise suppression means N is provided with an exhaust gas passage tw aligned with the respective axial centers js of the exhaust silencer Q and the flow promotion mechanism R.

This effectively prevents the interior space of the soundproof box from becoming too hot, while suppressing noise and promoting the flow of exhaust gas to the outside.

The box body K comprises a lower box component A that opens upward and an upper box component D that opens downward and is supported by the lower box component A.

The lower box component A is rectangular and comprises a bottom wall 1 on which the generator G is placed, and a lower peripheral wall B that forms part of the peripheral wall E and is erected integrally from the peripheral edge of the bottom wall 1. The upper box component D is comprised of a top wall 5 that is approximately the same size as the bottom wall 1, and an upper peripheral wall F that forms part of the peripheral wall E and is erected integrally from the peripheral edge of the top wall 5, with its lower edge fe abutting against the upper edge be of the lower peripheral wall B.

This allows for an ideal configuration that allows for flexible settings for the generator G.

One end of the lower peripheral wall B of the lower box component A and one end of the upper peripheral wall F of the upper box component D are connected via a damper hinge H, allowing each of the lower box component A and upper box component D to assume an open position (M).

As a result, the storage space S can be easily placed in the open position (M) by simply rotating the upper box component D.

An external air inlet hole U is provided on the peripheral wall E facing the first space portion s1, allowing communication between the external space and the first space portion s1.

This allows air for operating the generator G to be easily introduced into the first spatial portion s1 through the external air inlet hole U.

The bottom wall 1, peripheral wall E, top wall 5, and partition wall C are constructed from lightweight, rigid plastic plates.

As a result, the soundproof box of this embodiment offers excellent design freedom to achieve a lightweight design that is ideal for portability, etc.

Note that the present invention is not limited to the embodiments described above.

The partition wall may be any wall that is capable of separating the first space portion from the second space portion, and its specific configuration is not limited to that shown in the above-described embodiment.

The exhaust outlet holes may be provided in the peripheral wall, and are not limited to those provided in the rear wall as shown in the above-described embodiment.

The temperature rise suppression means may be any suitable device as long as it has an exhaust gas passage, a base end connection, and a tip opening located near the exhaust outlet hole.

For example, the temperature rise suppression means may not include an exhaust silencer or a flow promotion mechanism.

The external air introduction holes need only be provided on the peripheral wall facing the first space portion, and are not limited to being provided on the left and right side walls as in the above-mentioned embodiment.

Of course, the handles may be provided at any suitable location on the outer surface of the upper box component or the lower box component.

The soundproof box may be configured in any way to supply electricity generated by the generator housed inside, as long as it can obtain electricity from the generator. For example, the soundproof box may have an outlet on the perimeter wall.

The wall material that makes up the box body can be any material that can provide sound absorption and heat insulation. For example, in addition to the glass wool and glass cloth mentioned above, rock wool or other non-flammable cloth can also be used.

In addition, the specific configuration of each part is not limited to the above embodiment, and various modifications are possible without departing from the spirit of the present invention.

K...Box body S...Storage space G...Generator s1...First space portion s2...Second space portion C...Bulkhead J...Exhaust outlet hole N...Temperature rise suppression means

Claims (6)

A soundproof box is provided with a box body having a bottom wall, a peripheral wall erected from the peripheral edge of the bottom wall, and a top wall disposed on top of the peripheral wall, and the storage space of the box body is adapted to store a portable generator driven by an engine,
a partition wall is provided to separate a first space portion that forms the accommodation space and faces an air intake portion of the generator from a second space portion that forms the accommodation space and faces an exhaust gas discharge portion of the generator,
an exhaust outlet hole that can discharge the exhaust gas discharged from the exhaust gas discharge portion to an external space is provided in the peripheral wall facing the second space portion,
a temperature rise suppression means capable of suppressing a temperature rise in the second space portion is disposed in the second space portion,
the temperature rise suppression means is provided with an exhaust gas passage therein through which the exhaust gas can pass, has a base end connection part connected to the exhaust gas discharge part so as to be able to introduce the exhaust gas into the exhaust gas passage, and has a tip opening part through which the exhaust gas that has passed through the exhaust gas passage can be discharged,
The tip opening is set to be located near the exhaust outlet hole ,
The box body comprises a lower box component part that opens upward and an upper box component part that opens downward and is supported by the lower box component part,
the lower box constituent portion is rectangular and includes the bottom wall on which the generator is placed, and a lower peripheral wall that constitutes a part of the peripheral wall and is integrally erected from a peripheral edge portion of the bottom wall,
the upper box component includes a top wall having substantially the same size as the bottom wall, and an upper peripheral wall that constitutes a part of the peripheral wall, that is integrally suspended from the peripheral edge of the top wall, and whose lower edge abuts against the upper edge of the lower peripheral wall;
One end of the lower peripheral wall of the lower box component and one end of the upper peripheral wall of the upper box component are connected via a hinge,
The lower box component and the upper box component are each configured to be able to take an open position,
A soundproof box in which the vertical dimension of the upper peripheral wall of the upper box component is set larger than the vertical dimension of the lower peripheral wall of the lower box component . The soundproof box of claim 1, wherein the temperature rise suppression means includes an exhaust silencer for suppressing noise that may occur in the exhaust gas discharge section. A soundproof box as described in claim 1 or 2, wherein the temperature rise suppression means is equipped with a flow promotion mechanism that promotes the flow of the exhaust gas discharged from the tip opening. The soundproof box of claim 1, wherein the temperature rise suppression means includes an exhaust silencer on the upstream side for suppressing noise that may occur in the exhaust gas discharge section, and a flow promotion mechanism on the downstream side for promoting the flow of the exhaust gas discharged from the tip opening, and the exhaust gas passage is arranged to align with the respective axes of the exhaust silencer and the flow promotion mechanism. 5. The soundproof box according to claim 1, wherein the peripheral wall facing the first space portion is provided with an external air introduction hole for communicating between an external space and the first space portion. 6. The soundproof box according to claim 1, wherein the bottom wall, the peripheral wall, the top wall, and the partition wall are constructed to include lightweight rigid plastic plates.