JPH0557600B2 - - Google Patents

Description

[Detailed Description of the Invention] <Field of Application of the Invention> The present invention covers soundproof boxes, particularly engine equipment such as small generators used at construction sites, in order to reduce noise from the engine equipment. Regarding soundproof boxes.

<Prior Art> Conventionally, as this type of soundproof box, one is known in which, for example, an aluminum plate is formed into a box-like body that can be disassembled and assembled freely, and engine equipment is housed within this box-like body. (Refer to Utility Application No. 1983-201350).

<Problems to be solved by the invention> By the way, this type of soundproof box not only has sufficient soundproofing performance, but also needs to be lightweight, compact, and easy to handle, and can be easily disassembled into smaller pieces for storage and transportation. , are required as two major elements. In other words, since it is necessary to reduce noise in the city, the construction environment will inevitably be small. Therefore, it is difficult to handle items that are too heavy and bulky, and although a small truck will be used to transport the soundproof box along with various construction equipment, items that are too heavy and bulky are not desirable for transportation. ,That's what it means.

However, since the conventional soundproof box mentioned above uses aluminum plates, the overall weight is large.
Furthermore, although they can be disassembled, they are bulky and have many inconveniences in terms of transportation, handling, etc. because they are made of board material.

In view of such conventional circumstances, in this invention,
The objective is to provide a soundproof box that is lightweight, compact, easy to handle, and can be disassembled into small pieces for storage and transportation.

<Means for Solving the Problems> In order to achieve the above object, the soundproof box according to the present invention mainly includes a rectangular frame body made of a plurality of pipe materials that can be freely disassembled and assembled, and the frame body. a base plate provided at the bottom of the body and having a vibration isolating plate on the top surface for mounting engine equipment; an intake hood body with a built-in fan detachably provided on one of the opposing sides of the frame body; A structure consisting of an exhaust hood body with a built-in fan that is removably provided on the other side, and an auxiliary muffler that is provided on either of the two sides and is connected to the muffler of the engine equipment is inserted into a mesh-like structure from the inside. A flexible sheet-like soundproofing body consisting of a screen layer, a low specific gravity sound absorbing layer, a high specific gravity sound insulating layer, and a high strength exterior sheet layer laminated in this order,
Both hood bodies are covered so that they are exposed.

<Function> In other words, by forming the hood body as a frame member from pipe material that can be disassembled and assembled freely, it is lightweight and
It is compact, easy to disassemble and fold during storage and transport, and has sufficient soundproofing performance by making the soundproofing material into a sheet-like structure made by laminating a sound-absorbing layer, a sound-insulating layer, and an exterior sheet layer. In addition, the weight has been reduced, and by making it into a flexible sheet, it is easier to handle and can be disassembled and folded into a smaller size. Also,
Both the intake and exhaust hoods allow sufficient ventilation inside the soundproof box without emitting too much noise to the outside, so it maintains a good operating environment for the engine equipment housed in it while still providing sufficient soundproofing performance. It has also become possible to maintain the In addition, the intake
The fact that both exhaust hoods can be attached to and removed from the frame also contributes to ease of handling during storage and transportation. In addition, since the bottom of the frame body is provided with a base plate having a vibration isolating plate on the upper surface for mounting engine equipment, it is possible to reduce the vibration noise itself caused by the vibration of the engine equipment. Since an auxiliary muffler is also provided within the structure, by connecting the muffler of the engine equipment to this auxiliary muffler, the exhaust noise of the engine equipment itself can be reduced.

<Example> Hereinafter, an example of the present invention will be described with reference to FIGS. 1 to 6. In the following description, parts common to each embodiment are denoted by the same reference numerals, and redundant description will be omitted.

This soundproof box 1 is mainly composed of a structure 2 and a soundproof body 3.

The structure 2 includes a frame body 10, both intake and exhaust hood bodies 11 and 12, and a base plate 13. The frame body 10 is formed by freely disassembling and assembling a plurality of pipe materials into a rectangular shape. Specifically, a pair of side frames 16, 14 are connected to a pair of bottom frames 14, 14 via a hinge means 15, 1
6, and furthermore, this side frame 16,1
6, both ends of which fit into the connecting brackets 17 provided one pair each on the top of each side frame 16.
It is supported by a pair of fixed top frames 18, 18. Both the intake and exhaust hood bodies 11 and 12 are connected to a bracket board 1 as a "side" provided on the side frames 16 and 16, respectively.
9 and 19, each of which is provided with a fan (not shown) and a plurality of soundproof boards 20 covered with sound-absorbing sheets. The base plate 13 is for mounting a generator 21 as engine equipment, and is provided so as to span the bottom frames 14, 14, and a vibration isolating plate 22 for preventing vibrations is provided on the top surface of the base plate 13. A pair of them are installed to match the shape of the bottom of 21.

Further, an auxiliary muffler 42 is provided on the bracket board 19 on the side of the intake hood body 12 (see FIG. 6). This auxiliary muffler 42 includes a connecting portion 48,
It consists of a sound reduction part 49 and an exhaust part 50. A muffler of the generator 21 itself is connected to the connection part 48 by a flexible hose (not shown), and the sound of the exhaust from this muffler is reduced by the sound reduction part 49. By providing the auxiliary muffler 42 in this manner, the exhaust noise itself emitted from the generator 21 can be reduced.

The soundproof body 3 includes a rock wool layer 30 as a "sound absorption layer" and a high specific gravity resin sheet layer 3 as a "sound insulation layer".
1 and a resin sheet layer 32 using a resin sheet for tents as an "exterior sheet layer" are laminated, and a mesh-like screen layer 33 is further laminated to protect the rock wool layer 30. (Figure 5). Rock wool layer 3
0 has a specific gravity of 0.2 and a thickness of 4.0 mm. Further, the resin sheet layer 31 has a specific gravity of 2.3 and a thickness of 1.0 mm. However, these numerical values may be changed within a certain range as necessary. This soundproof body 3 is sewn to have a shape that approximately corresponds to the external shape of the frame body 10, and hood windows 35, 35 are provided on the sides corresponding to both the intake and exhaust hood bodies 11, 12. At the bottom of the hood window 35, there is an opening/closing part 3 that can be freely opened and closed by a so-called "magic fastener".
6 is provided. Further, on the other side, there are provided an operation window 37 and a wire window 38, which can be opened and closed with the same "magic fastener". In addition, the soundproofing material 3 is formed around the bottom by spreading out and touching the ground when the structure 2 is covered.
A flange-like edge 39 is formed by folding the resin sheet layer 32 inward using the resin sheet layer 31 as a core. (FIG. 4) Next, the state of use of this soundproof box 1 will be explained.

During storage and transportation, the frame body 10 can be separated from the bottom frame 14 and side frames 16 by removing the top frame 18, as shown in FIG.
is folded in a single-touch manner via the hinge means 15 and disassembled into small pieces, and both the intake and exhaust hood bodies 11 and 12 are removed from the frame body 10, and the soundproof body 3 is folded as appropriate using its flexibility. It is folded.

On the other hand, when actually using the frame body 10 in the above-described state, first the hinge means 15 is
side frame 1 to bottom frame 14 via
6 is placed in an upright position, and then, in this state, the generator 21 is placed on the base plate 13, and the top frame 18 is further assembled via the connection bracket 17. And both intake and exhaust hood bodies 1
1 and 12, the opening/closing part 36 is used to expose only the two hood bodies 11 and 12, and the sound insulating body 3 is covered to complete the installation.

In addition, the generator 21 housed in the soundproof box 1
The operation for activating is performed through the operation window 37. Further, the electric wire from the generator 21 is led out from the electric wire window 38.

According to tests, the soundproofing performance of this soundproof box 1 was 10 dB, which was 10 dB, reducing the generator noise of 73 phons to 63 phons even without connecting to the auxiliary muffler 42.
Then, the muffler of the generator 21 is connected to the auxiliary muffler 4.
If connected to 2, further soundproofing effect can be obtained.

In this soundproof box 1, by forming the frame body 10 as a skeleton member from pipe material that can be freely disassembled and assembled, it is lightweight and compact, and it is easy to disassemble and fold during storage and transportation. In addition, the sound insulation body 3 is laminated with a rock wool layer 30 as a "sound absorption layer", a high specific gravity resin sheet layer 31 as a "sound insulation layer", and a resin sheet layer 32 using a resin sheet for tents as an "exterior sheet layer". By making it into a sheet shape,
While achieving sufficient soundproofing performance, the product is lightweight, and because it is in the form of a flexible sheet, it is easy to handle and can be disassembled and folded into a smaller size. In addition, both intake and exhaust hood bodies 1
1 and 12, the inside of the soundproof box 1 is sufficiently ventilated without emitting too much noise to the outside.
It is also possible to maintain a good operating environment at all times. Furthermore, the fact that both the intake and exhaust hoods 11 and 12 are detachable from the frame 10 also contributes to ease of handling during storage and transportation.

<Effects of the Invention> As explained above, the soundproof box according to the present invention is constructed by disassembling and disassembling the frame body as a skeleton member.
A structure is formed from pipe materials that can be assembled freely, and an intake hood is attached to one of the opposing sides of the frame body, and an exhaust hood is detachably attached to the other side, and a sound absorbing layer, a sound insulating layer, and an exterior sheet layer are provided. Since it is covered with a laminated sheet-like soundproofing material, it provides sufficient soundproofing performance and maintains a good operating environment for the engine equipment accommodated at all times.In addition, it is lightweight, compact, and easy to handle. Moreover, it has the excellent effect of being able to be disassembled and folded into a smaller size for easier handling during storage and transportation. In addition, since the bottom of the frame body is provided with a base plate having a vibration isolating plate on the upper surface for mounting engine equipment, it is possible to reduce the vibration noise itself caused by the vibration of the engine equipment. Since an auxiliary muffler is also provided within the structure, by connecting the muffler of the engine equipment to this auxiliary muffler, the exhaust noise of the engine equipment itself can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view showing a soundproof box according to an embodiment of the present invention, FIG. 2 is a schematic perspective view showing the structure, and FIG. 3 is a schematic perspective view showing the structure in a folded state. , FIG. 4 is a schematic perspective view showing the soundproof body, FIG. 5 is a schematic sectional view of a part of the soundproof body, and FIG. 6 is a schematic perspective view showing the auxiliary muffler. DESCRIPTION OF SYMBOLS 1...Soundproof box, 2...Structure, 3...Soundproof body, 11...Intake hood body, 12...Exhaust hood body, 30...Rock wool layer (sound absorption layer), 31
... Resin sheet layer (sound insulation layer), 32 ... Resin sheet layer (exterior sheet layer), 42 ... Auxiliary muffler.

Claims (1)

[Claims] 1. A rectangular frame body mainly made up of a plurality of pipe materials that can be disassembled and assembled freely, and a vibration-proof plate provided at the bottom of the frame body and on the top surface for mounting engine equipment. a base plate; an intake hood body with a built-in fan removably provided on one side of the opposing sides of the frame; an exhaust hood body with a built-in fan removably provided on the other side; A structure consisting of an auxiliary muffler installed on one of the sides and connected to the muffler of the engine equipment, and a mesh screen layer, a low specific gravity sound absorption layer, a high specific gravity sound insulation layer, and a high strength A soundproof box characterized in that both hood bodies are covered with a flexible sheet-like soundproofing body formed by sequentially laminating exterior sheet layers so as to be exposed.