JP7271292B2 - Waterproof structure of soundproof box - Google Patents

Description

TECHNICAL FIELD The present invention relates to a waterproof structure of a soundproof box used for working machines such as compressors and generators.

A work machine such as a compressor or a generator is generally constructed as a soundproof work machine in which the components are housed in a soundproof box in order to prevent noise during operation from leaking out of the machine.

Since such a soundproof work machine is housed in a soundproof box and packaged, it is easy to transport and install, and there are many occasions where it is used outdoors such as construction sites and civil engineering sites.

In addition, in order to effectively utilize indoor space in plants and factory facilities, such soundproof work machines are installed outdoors, and only the compressed gas generated by the soundproof work machines, for example, is piped inside the factory. It may be used by pulling it into.

In this way, soundproof boxes for soundproof work machines that are installed and used outdoors are required only to have soundproofing or sound insulation properties to prevent noise such as the operating noise of the equipment contained in them from leaking out of the machine. In addition, it is also required to be waterproof in order to protect the equipment housed inside from rainwater and the like.

On the other hand, in order to enable maintenance and inspection of the equipment housed inside, the soundproof box must be equipped with an inspection window and must be able to remove all or part of the walls and top plate. As a result, the joints between the door stop and the inspection door provided on the inspection window, the joints between the walls, and the joints between the wall and the top plate, etc. gaps can occur.

Therefore, in order to prevent rainwater from entering the soundproof box through these gaps, one of the members constituting the seam is provided with an elastic material such as rubber, elastomer, or foamed resin, for example, a belt-shaped seal. By adhering the material and pressing this sealing material to the pressure contact surface provided on the other member, the sealing material is sandwiched between the two members, thereby preventing rainwater from entering through the gap described above. there is

As an example, in the soundproof box 100 shown in FIG. The front cover 122 is installed between the contact plate 131 provided on the side and the side surface 151 of the partition plate 150, and between the side surface 151 of the partition plate 150 and the contact plate (not shown) on the other side wall, and below the bottom side of the front cover 122. The lower flange 127 extending upward, the contact plates 131 of the one and the other side walls 130 of the soundproof box 100, and the side surface 151 of the partition plate 150 form door stops that abut against the rear surfaces of the front inspection doors 121a to 121c.

Then, by attaching the front inspection doors 121a to 121c to the soundproof box 100 so that the sealing materials 161a to 161c attached to the rear periphery of the front inspection doors 121a to 121c are pressed against the doorstop, The gaps between the rear surfaces of the front inspection doors 121a to 121c are sealed to prevent rainwater from entering through the gaps.

The soundproof box 100 shown in FIG. 10 further includes an upper flange 126 provided along the upper edge of the front cover 122, contact plates 131 provided on the one and the other side walls 130 of the soundproof box 100, and a partition plate 150. A mounting frame that abuts the rear surface of the upper front cover 124 is formed by the side surface 151 of the upper front cover 124. By attaching the upper front cover 124 so as to be in pressure contact with the mounting frame consisting of the side surface 151 of the partition plate 150, the gap between the mounting frame and the back surface of the upper front cover 124 is sealed, and rainwater enters through this portion. is prevented.

However, in the soundproof box 100 having the above configuration, the door stop and the mounting frame, which are the pressure contact surfaces for the sealing members 161a to 161c, 162a, and 162b, are not placed on the vertical surfaces such as the side surfaces 151 of the partition plate 150 and the contact plate 131. , plate-like members such as the lower flange 127 and the upper flange 126 of the front cover 122 are superimposed.

Therefore, as an example, as shown in FIG. A step S is generated between the partition plate 150 and the side surface 151 .

As a result, even if the sealing members 162a and 162b attached to the rear surface of the upper front cover 124 are pressed against the portion where the side surface 151 of the partition plate 150 and the upper flange 126 overlap, the sealing members 162a and 162b are completely inside the step S. As shown in FIG. 12, along the upper edge 126a of the upper flange 126 , there is a gap .delta. It is formed.

As a result, as indicated by the arrow in FIG. 12, rainwater flowing down between the sealing members 162a and 162b along the side surface 151 of the partition plate 150 reaches the position where the gap δ is generated. There is a risk that it will enter the soundproof box 100 in a horizontal straight line through the holes and wet the equipment housed inside.

The above-mentioned step S, which creates such a gap δ when the sealing materials 161 and 162 are pressed against each other, is not only created at the overlapping portion between the side surface 151 of the partition plate 150 and the upper flange 126, but also at the side wall 130. It also occurs at the overlapping portion between the plate 131 and the upper flange 126 , and also at the overlapping portion between the contact plate 131 of the side wall 130 and the side surface 151 of the partition plate 150 and the lower flange 127 .

Among them, as a structure for preventing rainwater from entering through a gap δ formed in a stepped portion formed along the bottom side 127c of the lower flange 127 of the front cover 122, Patent Document 1 described later discloses FIG. As shown in , a notch 190 is formed by cutting a part of the bottom side 127c of the lower flange 127 in a portion overlapping the contact plate 131 and in contact with the sealing material 161a. It is proposed to prevent rainwater from entering by forming a water cutoff surface 193 on the side 192 that diverts the rainwater that has entered the inside of the machine through the gap δ formed in the stepped portion into a downward flow and discharges it downward. do.

Japanese Patent No. 6212397

As described above, a notch 190 is formed by cutting a part of the bottom side 127c of the lower flange 127, and the side 192 of the notch 190 on the inside of the machine is used as a water stop surface 193. The waterproof structure described in Patent Document 1 (Fig. 13), the rainwater that has entered the inside of the machine through the gap δ generated in the stepped portion is changed to a downward flow by the water cutoff surface 193 and is made to flow down along the contact plate 131, so that the rainwater further flows into the soundproof box. prevent it from penetrating into the interior of the

However, such a waterproof structure occurs at a stepped portion along the bottom side of the plate member overlapping the vertical plane, such as the stepped portion at the bottom side 127c of the lower flange 127 of the front cover 122, as described above. However, even if a similar notch is provided in the upper side 126a of the upper flange 126 of the front cover 122, the rainwater that has entered the machine through the gap δ can be prevented. , it is not possible to form a water cutoff surface that changes the flow downward, and this cannot be diverted to prevent rainwater from entering through the step formed on the upper side of the plate-shaped member overlapping the vertical surface.

Accordingly, the present invention provides a waterproof structure for a soundproof box, which is relatively simple in structure but can prevent rainwater from entering the soundproof box due to a step formed on the upper side of a plate-like member that overlaps a vertical plane. intended to

Means for solving the problems are described below together with the symbols used in the mode for carrying out the invention. This code is for clarifying the correspondence between the description of the claims and the description of the mode for carrying out the invention, and needless to say, it is used restrictively to interpret the technical scope of the present invention. It is not something that can be done.

In order to achieve the above object, the waterproof structure of the soundproof box 1 of the present invention is
Sealing materials 62a and 62b are attached to one surface (rear surfaces of the upper front covers 25 and 26 in the embodiment) forming seams formed in the soundproof box 1, and the other surface (mounting frames 71 and 72 in the embodiment) are attached. are the pressure contact surfaces to which the sealing materials 62a and 62b are pressed, and in the waterproof structure of the soundproof box in which the sealing materials 62a and 62b are sandwiched between the one surface and the other surface,
The pressure contact surface (mounting frames 71, 72) is superimposed on the vertical surface (in the embodiment, the contact plate 31 provided on the side wall 30, 30' of the soundproof box 1 or the side surface 51 of the partition plate 50) and the vertical surface. plate-shaped members (upper flanges 222 and 232 of the front covers 22 and 23 in the embodiment), and the upper sides 222a and 232a of the plate-shaped members (upper flanges 222 and 232) in the portions overlapping with the vertical plane and The side edges 222b and 232b are formed with steps from the vertical surfaces (the contact plates 31 of the side walls 30 and 30' and the side surfaces 51 of the partition plate 50),
The corners C where the upper sides 222a, 232a and the side sides 222b, 232b of the plate-like members (upper flanges 222, 232) intersect, and the side sides 222b, 232b within a predetermined range from the corners C are Arranged within the contact width of the sealing members 62a and 62b with respect to the pressure contact surfaces 71 and 72, within the contact width of the sealing members 62a and 62b, along the side edges 222b and 232b and the upper edges 222a and 232a, The height direction is the length direction, and at least the upper end is bent in the horizontal direction , and the gap δ is formed so that the direction of rainwater infiltration is upward (Claim 1).

The gap δ is preferably formed to a height exceeding the height of rainwater rising due to capillary action (Claim 2).

The side edges 222b, 232b of the plate-like members (upper flanges 222, 232) may be arranged within the contact width of the seal members 62a, 62b over substantially the entire length (Claim 3).

Further, the corner portion C may be formed at an acute angle so that the sides 222b, 232b arranged within the contact width of the sealing members 62a, 62b may be inclined (claim 4; see FIG. 8).

Further, the side edges 222b, 232b arranged within the contact width of the seal members 62a, 62b may be crank-shaped (claim 5; see FIG. 9).

With the configuration of the present invention described above, the waterproof structure of the soundproof box 1 of the present invention has the following remarkable effects.

A corner portion C where the upper sides 222a, 232a and the side sides 222b, 232b of the plate-like members (upper flanges 222, 232) intersect, and the side sides 222b, 232b within a predetermined range from the corner portion C are the pressure contact surfaces (mounting surfaces). By arranging the sealing materials 62a and 62b within the contact width with respect to the frames 71 and 72), the gap δ formed within the contact width of the sealing materials 62a and 62b is increased along the side edges 222b and 232b. Along the upper sides 222a, 232a of the plate-like members (upper flanges 222, 232), the upper ends thereof are bent in the horizontal direction.

The gap δ formed in the contact width of the seal members 62a and 62b is formed in the height direction and the upper end is bent in the horizontal direction. It is not possible to reach the soundproof box 1 unless it rises inside and passes through a curved gap that is difficult to pass through, and as described with reference to FIG. Infiltration of rainwater through the gap δ was less likely to occur than in the case where the gap δ was formed. If the height of the gap δ is set to exceed the height of the rainwater rising due to capillary action, a large amount of rainwater will flood the lower end of the gap δ so that the lower end of the gap δ will be submerged in the rainwater. Even if the rainwater is introduced into the soundproof box, the rainwater cannot rise to the upper end position of the gap δ. .

In particular, in the configuration in which the side edges 222b, 232b of the plate-like members (upper flanges 222, 232) are arranged within the contact width of the sealing members 62a, 62b not only at the upper end portion but also over substantially the entire length, the sealing members 62a, 62b The length of the vertical gap δ formed within the contact width of 62b can be made longer (higher), and rainwater infiltration can be prevented more reliably.

A configuration in which the corner portion C is made an acute angle and the sides 222b and 232b arranged within the contact width of the sealing materials 62a and 62b are inclined, and the side sides 222b and 232b of the portion arranged within the contact width is formed in a crank shape, the shape of the gap δ formed along the sides 222b and 232b can be made into a shape that makes it difficult for water to pass through, and rainwater can be prevented from entering the soundproof box 1 more easily. We were able to create a structure that would be even less likely to occur.

1 is a perspective view of a soundproof box to which the waterproof structure of the present invention is applied; FIG. 1 is an exploded perspective view of a soundproof box to which the waterproof structure of the present invention is applied; FIG. Partial perspective view of the mounting frame for the upper front cover (overlapping portion of the side of the partition plate and the upper flange). Explanatory drawing of the waterproof structure (overlapping part of the side surface of a partition plate and an upper flange) of this invention. FIG. 5 is an enlarged cross-sectional view taken along the line VV of FIG. 4; FIG. 10 is a partial perspective view of the mounting frame for the upper front cover with the sealing material in contact (overlapping portion of the contact plate of the side wall and the upper flange); Explanatory drawing of the waterproof structure of this invention (the overlapping part of the contact plate of a side wall, and an upper flange). Explanatory drawing of the modification of the waterproof structure (overlapping part of the side of a partition plate and an upper flange) of this invention. Explanatory drawing of another modification of the waterproof structure (overlapping part of the side surface of a partition plate and an upper flange) of this invention. FIG. 2 is an exploded perspective view of a soundproof box having a conventional waterproof structure. The perspective view of the side of a partition plate and the overlapping part of an upper flange. Explanatory drawing of the conventional waterproof structure (the side of a partition plate and the overlapping part of an upper flange). FIG. 2 is an explanatory diagram (corresponding to FIG. 2 of Patent Document 1) of the waterproof structure described in Patent Document 1, where (A) is a side view, (B) is a front view, and (C) is line CC of (B). Cross section.

A soundproof box having a waterproof structure according to the present invention will be described below with reference to the accompanying drawings.

Reference numeral 1 in FIG. 1 denotes a soundproof box to which the waterproof structure of the present invention is applied, and in the embodiment shown in FIG. A frame 10 rectangular in plan view, four walls 20, 20', 30, 30' erected from the four sides of the frame 10, and these walls 20, 20', 30, 30' A top plate 40 is provided to cover the upper part of the enclosed space.

In this way, by covering the components (not shown) of the work machine such as the compressor and generator mounted on the frame 10 with the walls 20, 20', 30, 30' and the top plate 40, In addition to preventing noise from leaking to the outside of the machine, it is constructed so that the components housed inside are not directly exposed to wind and rain.

In the illustrated embodiment, the space inside the soundproof box 1 surrounded by the walls 20, 20', 30, 30' and the top plate 40 is divided into two chambers by a partition plate 50 (see FIG. 2). , Of the walls 20 and 30, the front wall 20, which is the wall forming the front of the soundproof box 1, is provided with a front inspection door 21 (21a to 21c). , the front of the soundproof box 1 can be opened and closed.

In order to enable opening and closing of the front wall 20 by such front inspection doors 21 (21a to 21c), vertical wall surfaces are installed at both ends in the width direction of the side walls 30 arranged in the direction perpendicular to the front wall 20. is provided, and the first front cover 22 is horizontally installed between the contact plate 31 of one side wall 30 and the side surface of the partition plate 50, and the side surface 51 of the partition plate 50 and the contact plate 31 of the other side wall 30'.

Both of the first front cover 22 and the second front cover 23 are composed of main bodies 221 and 231 forming grooves with a U-shaped cross section opening toward the inside of the soundproof box 1, and upper edges of the main bodies 221 and 231. upper flanges 222 and 232 which are plate-like members protruding upward from the lower edge portion, and lower flanges 223 and 233 which are plate-like members protruding downward from the lower edge portion. , 233 are overlapped and fixed to the side surfaces 51 of the contact plate 31 and the partition plate 50, which are vertical surfaces.

As a result, the lower flange 223 of the first front cover 22, the contact plate 31 of one of the side walls 30, and the side surface 51 of the partition plate 50 form a door stop in which the rear peripheral portions of the front inspection doors 21a and 21b are abutted. In addition, the lower flange 233 of the second front cover 23, the side surface 51 of the partition plate 50, and the contact plate 31 provided on the other side wall 30' serve as a door stopper against which the rear peripheral edge of the inspection door 21c is abutted. formed.

Therefore, by attaching the front inspection doors 21a to 21c to the soundproof box 1 so that the sealing materials 61a to 61c attached to the rear periphery of the front inspection doors 21a to 21c are pressed against the doorstop, the front inspection door can be Sealing materials 61a to 61c are sandwiched between the rear surface of 21a to 21c and the door stop to make this part waterproof.

A mounting frame 71 for the first upper front cover 25 is formed by the upper flange 222 of the first front cover 22, the contact plate 31 of one side wall 30, and the side surface 51 of the partition plate 50. A mounting frame 72 for the second upper front cover 26 is formed by the upper flange 232 of the second front cover 23, the side surface 51 of the partition plate 50, and the contact plate 31 provided on the other side wall 30'. The first upper front cover 25 and the second upper front cover 26 are mounted so that the sealing members 62a and 62b attached to the rear surfaces of the upper front cover 25 and the second upper front cover 26 are pressed against the mounting frames 71 and 72 described above. is attached to the soundproof box 1, and sealing materials 62a and 62b are sandwiched between the rear surfaces of the first upper front cover 25 and the second upper front cover 26 and the mounting frames 71 and 72, thereby waterproofing this portion. there is

The mounting frames 71 and 72 of the upper front covers 25 and 26 configured as described above are mounted on vertical surfaces such as the contact plate 31 provided on the side wall 30 and the side surface 51 of the partition plate 50 so as to face upward from the front covers 22 and 23. Since it is formed by overlapping the upper flanges 222 and 232, which are plate-shaped members that protrude outward, the overlapping portion between the contact plate 31 of the side wall 30 and the side surface 51 of the partition plate 50 and the upper flanges 222 and 232 However, a step S corresponding to the thickness of the upper flanges 222, 232 is generated at the upper sides 222a, 232a and side sides 222b, 232b of the upper flanges 222, 232 (the side 51 of the side wall 50 and the front cover 22, 23 (see FIG. 3).

Therefore, as described with reference to FIG. 12, the seal members 62a and 62b are attached to the mounting frames 71 and 72 so that the upper sides 222a and 232a of the upper flanges 222 and 232 cross the width direction of the seal members 62a and 62b. When pressed against each other, this step S forms a gap .delta. across the sealing members 62a and 62b, and rainwater enters the soundproof box 1 through this gap .delta.. As shown in FIG.

Therefore, in the waterproof structure of the present invention, the corner C where the upper sides 222a, 232a and the side sides 222b, 232b of the upper flanges 222, 232 intersect, and the side sides 222b, 232b within a predetermined range from the corner C (embodiment (substantially the entire length of the side edges 222b and 232b in ) are arranged within the contact width of the seal members 62a and 62b with respect to the mounting frames 71 and 72. As shown in FIG.

With this configuration, as shown in FIG. 4, the contact widths of the sealing members 62a and 62b extend along the side edges 222b and 232b and the upper sides 222a and 232a that are arranged within the contact widths of the sealing members 62a and 62b. A gap .delta. is formed therein, the height direction being the length direction, and the upper end being bent in the horizontal direction.

Accordingly, the fact that the inside and outside of the soundproof box 1 are communicated through the gap δ even by attaching the seal members 62a and 62b is common to the conventional waterproof structure described with reference to FIG.

However, in the waterproof structure of the present invention, since the gap δ is formed in the height direction and the upper end is bent in the horizontal direction, rainwater flows through the gap δ against the gravity. As it rises to the position, it cannot enter the soundproof box 1 unless it passes through the gap δ that is curved and difficult to pass through, and the horizontal straight gap δ described with reference to FIG. Rainwater is less likely to enter through this gap δ than in the case where the gap δ is provided.

In particular, by forming the height of this gap δ to a height exceeding the height of rainwater rising due to capillary action, rainwater flows through the gap δ generated within the contact width of the sealing members 62a and 62b. Intrusion into the inside can be prevented more reliably.

The height of the vertical gap δ, which exceeds the height of rainwater rising due to capillary action, may be obtained experimentally, but for example, based on the plate thickness of the upper flanges 222, 232 , may be obtained by calculation as follows.

Water is sucked up by capillary action until the weight of the sucked water balances with the force that pulls up the water in the capillary due to surface tension.

Here, when the sides 222b, 232b of the upper flanges 222, 232 are arranged within the contact width of the sealing materials 62a, 62b, the cross-sectional shape of the gap δ formed along the sides 222b, 232b is Assuming an isosceles right triangle with two sides of length corresponding to the plate thickness r of the flanges 222, 232, the weight W of the water column raised to the height H is
W=Hρgr ² /2
ρ is the density of water, and g is the gravitational acceleration.
On the other hand, the force P that pulls up water in the capillary due to surface tension is
P=(2r+r×√2)×T cos θ
T: surface tension, θ: contact angle.
Therefore, when the weight W of the water column raised to the height H is balanced with the force P that pulls up the water in the capillary due to the surface tension,
Hρgr ² /2=(2r+r×√2)×T cos θ
becomes.
Therefore, the water uptake height H due to capillary action is
H=(4r+2r×√2)×T cos θ/ρgr ²
becomes.
Here, assuming that the coating film of the soundproof box has high hydrophilicity similar to that of glass and that the contact angle θ is as low as 10°,
Surface tension of water T = 0.0728 N/m (20°C)
Density of water ρ=1000kg/m ³
From gravitational acceleration g=9.80665m/s ² ,
H=(4r+2r×√2)×T cos θ/ρgr ² ≈4.9921×10 ⁻⁵ /r(m ² ) [Formula 1]
becomes.

In general, the coating film that covers the surface of the soundproof box is less hydrophilic than glass, and the contact angle θ is larger than the 10° substituted in the above calculation. The height H is lower than the height H determined by the above [Equation 1].

In the above calculation, the cross section of the gap δ (capillary cross section) is assumed to be an isosceles right triangle having two sides whose length is the plate thickness r of the upper flanges 222, 232. 5, the side formed by the side surface 51 of the partition plate 50, which is a vertical plane, is longer than the side formed by the thickness r of the upper flange 222. The cross-sectional area of the gap δ becomes larger.

In addition, the larger the cross-sectional area of the capillary, the lower the liquid suction height. Therefore, in this respect, the actual height of the water rising in the gap δ can be obtained by the above [Equation 1]. lower than height H.

Therefore, the height obtained by the above [Equation 1] is a value with sufficient margin for the actual suction height, and the vertical direction formed at the side edges 222b, 232b of the upper flanges 222, 232 By forming the gap δ to a height exceeding the height H determined by the above [Formula 1], the gap δ generated in the side sides 222b, 232b and the upper sides 222a, 232a of the upper flanges 222, 232 Infiltration of rainwater into the soundproof box 1 can be prevented.

As an example, when the plate thickness r of the upper flanges 222, 232 is 1.2 mm, the height H obtained by the above [Equation 1] is 41.6 mm. is 1.2 mm thick, the length of the sides 222b, 232b of the upper flanges 222, 232 is 47.8 mm, and as shown in FIG. By arranging it within the contact width of the seal members 62a and 62b, a vertical gap δ is formed within the contact width of the seal members 62a and 62b with a length that is sufficiently large for the height of the water sucked up by capillary action. forming.

As a result, in this embodiment, the soundproof box 1 is equipped with a cooling fan that blows out cooling air from the inside of the machine to the outside of the machine. Although the waterproof structure of the present invention is applied, infiltration of rainwater through this portion could not be confirmed.

The waterproof structure of the embodiment shown in FIG. In addition to arranging the upper end corner portion C of the upper flange 232 provided on the second front cover 23 and the side wall 232b within the contact width of the second sealing member 62b, the waterproof seal of the present invention is arranged within the contact width of the second sealing member 62b. This shows a configuration in which the structures are provided bilaterally symmetrically.

In this configuration, the upper flange 222 of the first front cover 22 is formed slightly shorter than the overall length of the main body 221, and the upper flange 232 of the second front cover 23 is also formed slightly shorter than the overall length of the main body 231. An appropriate gap is formed between the side 222b of the upper flange 222 of the first front cover 22 and the side 232b of the upper flange 232 of the second front cover 23. As shown in FIG.

As a result, the side wall 222b of the upper flange 222 of the first front cover 22 is arranged within the contact width of the first seal member 62a in the width direction, and the upper portion of the second front cover 23 is arranged within the contact width of the second seal member 62b. Even if the side wall 232b of the flange 232 is arranged, the first sealing material 62a and the second sealing material 62b are prevented from interfering with each other.

In this embodiment, the front cover is described as having a two-piece structure consisting of the first front cover 22 and the second front cover 23, but the first front cover 22 and the second front cover 23 are integrally formed. can be

In this case, notches may be provided in the upper flanges 222 and 223 at the boundary positions between the first front cover 22 and the second front cover 23 to provide the side edges 222b and 232b described above.

The seal structure of the present invention, as described with reference to FIG. As shown in FIGS. 6 and 7, not only the stepped difference that occurred, but also the stepped portion that occurred at the edge portion of the upper flange 232 of the front cover 23 superimposed on the contact plate 31 of the side wall 30' which is a vertical surface. It can also be applied as a waterproof structure that prevents rainwater from entering.

In this case also, as described with reference to FIG. 4, the overall length of the upper flange 232 is slightly shorter than the overall length of the main body 231 of the front cover (the second front cover 23 in the examples of FIGS. 6 and 7). When the side 232b of the upper flange 232 is arranged away from the frame plate 32 provided on the side wall, and the corner C and the side 232b of the upper flange 232 are arranged within the range of the contact width of the sealing material 62b However, the sealing member 62b is configured so as not to interfere with the frame plate 32 of the side wall 30'.

Incidentally, in the waterproof structure described with reference to FIGS. The side edges 222b and 232b of the flanges 222 and 232 are not limited to this configuration, and as shown in FIG. The side edges 222b and 232b are inclined, and when the corner portion C and the side edges 222b and 232b are arranged within the contact width of the sealing materials 62a and 62b, the side edges of the upper flanges 222 and 232 A sloped gap δ may be formed along 222b, 232b.

Further, as shown in FIG. 9, the sides 222b, 232b of the upper flanges 222, 232 of the front covers 22, 23 are formed in a crank shape, and the corners C, C of the upper flanges 222, 232 and the sides 222b, 232b are arranged within the contact width of the seal members 62a and 62b, a crank-shaped gap .delta. is formed along the side edges 222b and 232b.

With this configuration, rainwater that tries to enter the soundproof box 1 through the gaps δ formed along the side edges 222b, 232b of the upper flanges 222, 232 is prevented from entering the gaps bent obliquely or in a crank shape. It is not possible to enter the soundproof box 1 unless it rises within δ, and compared to the case of forming the vertical gap δ described with reference to FIGS. In addition, it has a structure that makes it more difficult for rainwater to enter.

As described with reference to FIG. 12, when the gap δ is formed horizontally across the sealing members 162a and 162b, rainwater reaching the gap δ formed in the horizontal direction causes This rainwater can easily enter the soundproof box 1 through the gap δ.

However, as in the waterproof structure of the present invention described with reference to FIGS. It is not possible to enter the soundproof box 1 unless it rises inside the gap δ, and this gap δ has a shape in which the upper end is bent in the horizontal direction. Rainwater cannot enter the soundproof box 1 unless it passes through the gap δ, which is curved and difficult to pass through.

In addition, when this gap δ is formed as a relatively narrow space and a large amount of rainwater is introduced into the lower end of the gap δ so that the lower end of the gap δ is submerged in rainwater, the rainwater is As the rainwater is sucked into the gap δ, the surface tension lifts the rainwater and the weight of the rainwater rises to a balance position.

However, even in such a case, if the above-mentioned gap δ is formed to a height that exceeds the height of rainwater rising due to capillary action, even if rainwater is sucked into the gap δ due to capillary action, The rainwater that has been sucked up cannot rise to the upper end position of the gap δ and cannot enter the soundproof box 1 .

Moreover, the waterproof structure capable of preventing such intrusion of rainwater is provided by the corners C, C where the upper sides 222a, 232a and the side sides 222b, 232b of the upper flanges 222, 232 intersect, and the predetermined angle from the corners C, C. This can be achieved by adopting a relatively simple configuration in which the sides 222b and 232b within the range are arranged within the contact width of the sealing members 62a and 62b.

1 soundproof box
10 frame 20, 20' front wall (wall body)
21 (21a to 21c) front inspection door 22 front cover (first front cover)
221 body (of the first front cover)
222 upper flange (of the first front cover)
222a upper side (of the upper flange of the first front cover)
222b side edge (of the upper flange of the first front cover)
223 lower flange (of first front cover)
224 step (of the first front cover)
23 Front cover (second front cover)
231 body (of the second front cover)
232 upper flange (of the second front cover)
232a upper side (of the upper flange of the second front cover)
232b side edge (of the upper flange of the second front cover)
233 lower flange (of the second front cover)
234 step (of the second front cover)
25 upper front cover (first upper front cover)
26 upper front cover (second upper front cover)
30, 30' side wall (wall)
31 contact plate 32 frame plate 40 top plate 50 partition plate 51 side (partition plate)
61 (61a, 61b) Seal material (for front inspection door)
62 (62a, 62b) Seal material (for upper front cover)
71, 72 mounting frame 100 soundproof box 120 front wall 121 (121a to 121c) front inspection door 122 front cover 124 upper front cover 126 upper flange 126a upper side (of the upper flange)
127 lower flange 127c bottom (of lower flange)
130 One side wall 131 Contact plate 150 Partition plate 151 Side surface 161a to 161c Seal material (for front inspection door)
162a, 162b sealing material (for upper front cover)
190 notch 192 inboard side (of notch)
193 Water stop surface δ Gap C Corner S Step

Claims (5)

A sealing material is attached to one surface forming a seam formed in the soundproof box, and the other surface is used as a pressure contact surface to which the sealing material is pressed, and between the one surface and the other surface, In the waterproof structure of the soundproof box sandwiching the sealing material,
The pressure contact surface is composed of a vertical surface and a plate-shaped member superimposed on the vertical surface, and a step between the vertical surface and the upper side and the side of the plate-shaped member overlapping the vertical surface is provided. is formed,
The corner portion where the upper side and the side side of the plate-like member intersect and the side side of a predetermined range from the corner are arranged within the contact width of the sealing material with respect to the pressure contact surface, and the sealing material Within the contact width of the above, along the side and upper sides, the height direction is the length direction, and at least the upper end is bent in the horizontal direction. A waterproof structure of a soundproof box, characterized by forming. 2. A waterproof structure for a soundproof box according to claim 1, wherein said gap is formed to a height exceeding the height of rainwater rising due to capillarity. 3. A waterproof structure for a soundproof box according to claim 1, wherein said side edge of said plate-like member is arranged substantially over the entire length thereof within a contact width of said sealing material. A waterproof structure for a soundproof box according to any one of claims 1 to 3, characterized in that the corner portion is formed at an acute angle and the side edge located within the contact width of the sealing member is inclined. A waterproof structure for a soundproof box according to any one of claims 1 to 4, characterized in that said side edge of said seal member disposed within said contact width is formed in a crank shape.

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