TWI733204B - Sound insulation package - Google Patents

Abstract

The soundproof package (1) is equipped with: a package body (3) with an opening (2) containing a noise source inside, and a door (4) that can close the opening (2) of the package body (3) , And a sound-insulating structure (5) arranged between the package body (3) and the door (4), and the opening (2) is formed with an opening surrounding surface (13) located on the same plane , On the outer peripheral side of the door (4) is provided: a folding piece (15) that is folded back toward the package body (3) and the ends of the package body (3) are all located on the same plane, and a sound insulation structure (5) It has a gasket (17) and a sound-absorbing member (16). The gasket (17) is provided on the side of the package body (3) of the turn-back sheet (15), and will interact with the opening when the opening (2) is closed. The surrounding surface (13) is in contact, and the sound-absorbing member (16) is placed on the side of the center of the door than the folding piece (15), and when the opening (2) is closed, it comes in contact with the surrounding surface (13) of the opening The thickness becomes thinner than in the open state.

Description

Sound insulation package

The present invention relates to a soundproof package that can prevent noise from a noise source housed inside from leaking from an opening to the outside, and particularly relates to a soundproof structure of a door provided in the soundproof package.

In the past, screw compressors have been used in various fields for reasons such as excellent efficiency. In such a screw compressor, noise exceeding 100dB is generated from the mechanical part. Therefore, for the screw compressor, in order to protect the working environment of the operator, the purpose of sound insulation is generally to surround the mechanical part with a shell-shaped sound insulation package.

In addition, even when the screw compressor is surrounded by a soundproof package, it is necessary to provide an opening in the soundproof package in order to ensure the convenience of assembly work and maintenance work of the mechanical part. Furthermore, in order to close the opening after maintenance work, etc., a door and a cover are provided in the opening.

However, even if the door and cover are provided, the noise leaking from the opening cannot be eliminated. This is because if the method of fixing the door is unstable, or if there is only a slight difference in height around the door or the cover, there will be a gap between the door, the cover and the main body, and the door and the cover The sound insulation performance is reduced.

Therefore, Patent Document 1 and Patent Document 2 propose a sound-insulating package in which such a decrease in sound-insulating performance is less likely to occur.

For example, Patent Document 1 discloses a soundproof package that stably seals the gap without being affected by the degree of closure, thereby reliably reducing noise leakage. The soundproof package of Patent Document 1 described above includes a main body having an opening and accommodating a noise source inside, a flat door that closes the opening, and a sealing member provided around the door and provided on the inner surface. The soundproof package is provided with a folded-back portion for maintaining a state where the thickness of the sealing member when the opening is in the closed state is thinner than that in the open state, and the folded-back portion is brought into contact with the frame of the main body. Determine and maintain the distance between the closed door and the main body.

In addition, Patent Document 2 discloses a sound-proof package that has an opening and closing door and can provide a waterproof structure that can completely prevent rainwater from penetrating into the housing.

In the soundproof package of Patent Document 2, the opening of the housing body is opened and closed by a door that is rotatably supported. A protrusion is formed around the opening, and the protrusion is provided on the inner surface of the door. For the sealing material to be pressed, an outer sealing material is provided around the opening of the housing body except for the door support portion, and an inner sealing material is provided along the door support portion of the door. When the door is closed, The protrusion is in close contact with the sealing material, the frame edge of the door excluding the door support portion is in close contact with the outer sealing material, and the inner sealing material is in close contact with the housing main body. [Prior Technical Literature] [Patent Literature]

[Patent Document 1] JP 2014-219662 A [Patent Document 2] JP 2004-063785 A

[The problem to be solved by the invention]

However, the sealing material (liner) is generally made of rubber and other materials, and rubber cannot completely prevent sound from passing through. Therefore, as in Patent Document 1, the combination of a structure in which the folded-back portion of the package and the frame of the main body are in contact with the sealing member can effectively reduce noise leakage.

However, recently, the demand for large-sized screw compressors has increased, and with this, the package has also tended to increase in size. Even if the size of the package is increased in this way, various measures can be taken against the sound leaking from the opening of the duct, etc., and it becomes easier to reduce the noise leaking from the duct.

However, on the other hand, the noise caused by the sound leakage from the gap of the door has become more suspicious as the size of the package becomes larger. In proportion to the increase in door size, the deformation of the door increases, and the gap formed between the door and the opening also increases. In this case, the area of the leakage portion that causes noise leakage increases, and the possibility that noise leakage becomes serious increases.

In addition, although there is a method of using a plurality of sealing materials like the soundproof package of Patent Document 2, there are problems such as high cost and time-consuming assembly.

The present invention was developed in view of the above problems, and its purpose is to provide a soundproof package that does not increase the manufacturing cost and assembly work, and can reliably prevent sound leakage from the gap to the outside even if it is enlarged. [Technical means to solve the problem]

In order to solve the above-mentioned problems, the sound insulation package of the present invention adopts the following technical means. That is, the soundproof package of the present invention includes: a package main body that houses a noise source inside and has an opening, a door that can close the opening of the package main body, and is provided on the package main body and the door A sound-insulating structure capable of isolating the noise of the noise source. It is characterized in that a peripheral surface of the opening which is all on the same plane is formed around the opening, and a folding piece is provided on the outer peripheral side of the door. The sheet is folded back toward the package body side and the ends of the package body side are all located on the same plane. The sound insulation structure has a gasket and a sound absorbing member. The gasket is provided on the package body side of the folded back sheet. When the opening is closed by the door, it will come into contact with the surrounding surface of the opening. The sound absorbing member is arranged closer to the center of the door than the folding piece. When the opening is closed by the door , By contacting the surrounding surface of the aforementioned opening, the thickness becomes thinner than in the open state.

It is also preferable that the turn-back piece has a first turn-back piece and a second turn-back piece, and the first turn-back piece is formed by folding back toward the package body side at the periphery of the door body provided in the center of the door In the direction intersecting the surface of the package body, the second turn-back piece is formed at the front end of the first turn-back piece toward the inside in the width direction, and is formed in a direction parallel to the peripheral surface of the opening. The gasket is attached to the second folding piece, and the sound absorbing member is formed to be thicker than the thickness from the door main body to the second folding piece.

It is also preferable that on one end side in the width direction of the door, a hinge that pivots the door rotatably with respect to the package body is provided, and on the other end side in the width direction of the door, the door is provided relative to In the fixing part where the package body is fixed, the hinges are provided on the upper and lower sides of the door, and the surrounding surface of the opening is extended to the center of the door than the hinged position of the door.

It is also preferable that a rubber gasket having an attachment portion and a hollow portion is used as the gasket, the attachment portion is attached to the second folding piece in a pinched state, and the interior of the hollow portion is hollow. [Effects of Invention]

According to the soundproof package of the present invention, the manufacturing cost and assembly work are not increased, and even if the size is increased, the sound leakage from the gap to the outside can be reliably prevented.

Hereinafter, the embodiment of the soundproof package 1 of the present invention will be described in detail with reference to the drawings.

The soundproof package 1 of the present invention has: a package main body 3 that houses a noise source inside and has an opening 2; a door 4 that can close the opening 2 of the package main body 3; and is provided in the package main body 3 and A sound insulation structure 5 between the doors 4 and capable of isolating the noise of the noise source. The soundproof package 1 is arranged to surround the noise source to form a housing that can isolate the noise source from the outside, thereby preventing the noise emitted from the noise source from leaking to the outside.

Specifically, an opening 2 is provided in the soundproof package 1 so that maintenance and various operations can be performed from the outside to equipment and the like of a noise source housed inside. Furthermore, the opening 2 is provided with a door 4 that can close the opening 2, and a soundproof structure 5 is provided between the package body 3 and the door 4 to prevent the noise of the noise source from leaking to the outside from the gap of the opening 2 .

The opening 2 provided with the sound insulation structure 5 of the present invention is a small window that includes a part of the wall surface of the casing. It is also possible to remove one wall surface among the plural wall surfaces constituting the casing, and remove the wall surface. The formed opening is regarded as the opening portion 2 of the present invention. In this embodiment, an example in which the opening formed by the removal wall surface is taken as the opening 2 is given, and the soundproof package 1 of the present invention will be described in detail.

Next, a description will be given of the package main body 3 constituting the soundproof package 1, the opening 2 of the package main body 3, and the door 4 capable of closing the opening 2.

First, the noise source contained in the package main body 3 will be explained.

As the noise source contained in the package main body 3, there are equipment with a mechanism for generating loud noises during operation, and the like. As a device that generates noise in this way, in addition to the screw compressor mentioned in the present embodiment, there is also a device such as a pump having a large operating noise.

The package body 3 is arranged to surround the above-mentioned noise source and isolate the inside containing the noise source from the outside, thereby suppressing noise leakage to the outside. Specifically, the package main body 3 of this embodiment includes a base 6 on which a noise source can be placed, a plurality of frame portions 7, which are arranged on the outer edge side of the base 6 so as to surround the noise source, A door 4 arranged between the frame portions 7 arranged in parallel with each other and capable of closing a gap (opening portion 2) formed between the frame portions 7 and a top plate 8 arranged on the upper portion of the frame portion 7 and the door 4.

That is, the package main body 3 is configured to contain the noise inside the housing by arranging members such as the base 6, the frame portion 7, the door 4, and the top plate 8 above and below the noise source, left, right, and front.

In the case of the soundproof package 1 of this embodiment, a hinge 9 and a fixing portion 10 are provided between the door 4 and the frame portion 7, and the door 4 can be attached to the frame portion 7 as a hinged door by using these members. That is, in the soundproof package 1 of this embodiment, the gap between the frame portions 7 is used as the opening 2, and the opening 2 is made openable and closable by the door 4.

The following describes the base 6, the top plate 8, the pillar, and the door 4 that constitute the package body 3 in the soundproof package 1 of this embodiment.

As shown in Fig. 2, the base 6 is an angular (plate-shaped) member whose vertical dimension is smaller than the horizontal dimension (front-rear direction and left-right direction). When viewed from above, it is formed into a long rectangular shape in the left-right direction. Like shape. In addition, the base 6 may have other shapes such as a substantially square. A noise source (not shown) is placed in the center of the base 6.

In addition, on the upper surface on the outer edge side of the base 6, a plurality of frame portions 7 are arranged along the vertical direction or the horizontal direction. The plurality of frame portions 7 are arranged at a distance in the horizontal direction or the vertical direction so as to be parallel to each other. In addition, among the plurality of frame portions 7, a door 4 is provided between the frame portions 7 arranged in parallel with each other.

Specifically, the frame portion 7 includes a vertical frame 11 arranged along the up-down direction, and a horizontal frame 12 arranged along the left-right direction.

The vertical frame 11 is a long rod-shaped member erected on the outer edge side of the base 6, and is a member generally called a "column". The lower end of the vertical frame 11 is fixed to the outer edge of the base 6 with bolts or the like. In addition, the upper end of the vertical frame 11 is fixed to the lower surface on the outer edge side of the top plate 8 with bolts or the like. That is, the vertical frame 11 is attached in a state where the two points of the base 6 and the top plate 8 are connected in the vertical direction (the state is connected in the vertical direction).

The horizontal frame 12 is a member that connects the vertical frames 11 arranged to face each other in the horizontal direction, and generally uses an L-shaped angle material or the like. The horizontal frame 12 includes those that are erected in the horizontal direction between the upper ends of the vertical frames 11 and those that are erected in the horizontal direction between the lower ends of the vertical frames 11.

That is, the frame portion 7 is a set of vertical frames 11 arranged in parallel in the horizontal direction with a distance and facing each other in the vertical direction, and a set of vertical frames 11 arranged in parallel in the vertical direction with a distance facing each other in the horizontal direction The horizontal frame 12 is formed in a well-shaped combination. In addition, an opening 2 is formed in the center of the frame 7 combined in a well shape.

In other words, the "opening 2" of the soundproof package 1 of this embodiment is a part surrounded by the horizontal frame 12 and the vertical frame 11 combined in a well shape, and is formed on the "opening peripheral surface" around the opening 2. 13" is the surface (the surface facing the outside) of the horizontal frame 12 and the vertical frame 11 combined in a well shape with each other.

For example, in the example of FIG. 1, five vertical frames 11 are erected at equal intervals in the left and right directions on the front side (the hand side of the figure), and five vertical frames 11 are erected in the same manner on the back side (the back side of the figure). 11. In addition, among the vertical frames 11, between the vertical frames 11 adjacent to each other in the left-right direction and the front-rear direction, the horizontal frames 12 are respectively erected between the upper end sides and the lower end sides. That is, in the soundproof package 1 of FIG. 1, 16 horizontal frames 12 are erected between 10 vertical frames 11, and a total of 8 openings 2 can be formed in all of them.

In FIG. 2, among the four openings 2 on the front (opening toward the front), the leftmost opening 2 is taken as an example to illustrate the relationship between the opening 2 and the sound insulation structure 5.

As shown in FIG. 2, the vertical frame 11 on the left side of the opening 2 is provided with a hinge 9 for pivotally supporting the door 4 described later. The hinges 9 are each provided on the upper side and the lower side of the vertical frame 11, and a total of two are provided up and down. In addition, the vertical frame 11 on the left side of the opening 2 (here, the "left side" is the left side in FIG. 2 when the door 4 is opened) is provided with a fixing portion 10 for fixing the door 4 to the vertical frame 11. In the example of FIG. 2, the fixing portion 10 is provided at the same height as the hinge 9 by the same number (two in total).

The above-mentioned hinge 9 is a member that pivotally supports the door 4 with respect to the frame portion 7 of the package body 3. The hinge 9 of the present embodiment has a first member 9a attached to the side of the vertical frame 11, and a second member 9b provided on the side of the door 4. With respect to the second member 9b, the first member 9a is rotatable about an axis oriented in the up-down direction, so that the door 4 can be pivotally supported with respect to the package main body 3.

In addition, the fixing portion 10 can be detachably locked to the locking portion provided on the other side of the door 4 or the package body 3 by the hook portion provided on one side of the door 4 or the package body 3, and can be used for The package body 3 fixes the door 4.

In addition, the number of the hinges 9 and the fixing parts 10 is preferably two compared to three or more. When there are three or more hinges 9 and fixing parts 10, the door 4 may become difficult to open and close due to the influence of tolerances, and the deformation of the door 4 may become larger, causing a gap between the door 4 and the frame 7 The possibility of widening (the sound leakage area becomes larger). In addition, as will be described later, there may be cases where the spacer 17 cannot be installed at the location where the hinge 9 is provided. Therefore, the fewer the number of hinges 9 to be installed, the better. Therefore, in consideration of the improvement in sound insulation, the number of hinges 9 and the number of fixing parts 10 to be installed is preferably limited to two.

The top plate 8 is a member disposed on the upper side of the frame portion 7 and the door 4, and can close the upper opening of the housing formed by the frame portion 7 and the door 4. The top plate 8 is a plate-shaped member whose dimensions in the front-rear direction and the left-right direction are substantially the same as those of the base 6, and are provided along the horizontal direction at a distance from the base 6 and parallel to the base 6.

The door 4 is a plate-shaped member capable of closing the opening 2 of the package body 3, and the size in the left-right direction and the size in the vertical direction are formed to be slightly larger than the opening 2. In other words, the outer edge side of the door 4 is installed at a position where it can overlap the frame portion 7 of the package body 3 when the door is closed, so that it can be in surface contact with the opening peripheral surface 13 of the opening portion 2. Furthermore, between the outer edge side of the door 4 and the opening peripheral surface 13 (the surface of the frame portion 7) of the package body 3, a sound insulation structure 5, which is a characteristic of the present invention, is provided.

Specifically, as shown in FIG. 2, the above-mentioned door 4, when viewed from the front, has a door main body 14 (main body portion of the door 4) of a rectangular shape that is long in the vertical direction. That is, the door main body 14 is formed of a longitudinally rectangular metal plate whose upper and lower sides are shorter than the left and right sides.

In addition, a folding-back piece 15 is formed on the outer peripheral side of the door main body 14, and the folding-back piece 15 is formed using a metal plate extending in a direction crossing the door main body 14. The folding pieces 15 are respectively provided on the upper, lower, left, and right sides of the door main body 14, and are folded back at an angle of 90° toward the package main body 3 with the upper, lower, left, and right sides of the door main body 14 as the boundary. For example, based on the closed state, the upper folding piece 15 is from the upper side of the door body 14 toward the rear (when the door 4 is closed, the direction from the outside of the windshield package 1 to the inside; in other words, when the door 4 is closed, A member extending in the horizontal direction from the front surface to the back surface of the door 4, and the upper side is a boundary and is connected to the door main body 14 intersecting at an angle of 90° with respect to the door main body 14. In addition, the folding piece 15 on the right side is a member that extends in the horizontal direction from the right side of the door body 14 toward the rear, and the upper edge is a boundary and is connected to the door body 14 at an angle of 90° to the door body 14.

The end of the package body 3 side of the folding piece 15 (the end opposite to the door body 14) is located on the same plane up, down, left, and right. When the opening 2 is closed by the door 4, one of the folding pieces 15 is The turned-back end is located at the same distance from the surface 13 around the mouth.

The sound insulation package 1 of the present invention is characterized in that a sound insulation structure 5 capable of isolating the noise of the noise source is provided between the package body 3 (the surface of the frame portion 7 or the opening surrounding surface 13) and the door 4. In this soundproof structure 5, instead of using a sound absorbing member and a gasket (seal member) alone for sound insulation, both the sound absorbing member 16 and the gasket 17 are used in combination for sound insulation.

Specifically, in the soundproof package 1 of the present invention, the opening surrounding surfaces 13 are all located on the same plane, and the surfaces of the vertical frame 11 and the horizontal frame 12 surrounding the opening 2 are all located on the same plane.

Moreover, the aforementioned gasket 17 is attached to the end of the package body 3 side of the turn-back piece 15. When the opening 2 is closed by the door 4, the gasket 17 can interact with the opening surrounding surface of the package body 3. 13 (the surfaces of the vertical frame 11 and the horizontal frame 12) are in contact. In addition, the sound absorbing member 16 is provided on the center side of the door than the folding piece 15. When the opening 2 is closed by the door 4, the thickness becomes larger than that in the open state by contacting the surrounding surface 13 of the opening. Time is thinner. In other words, in the soundproof package 1 of the present invention, both the liner 17 and the sound absorbing member 16 are brought into contact on the surfaces of the vertical frame 11 and the horizontal frame 12, whereby both the sound absorbing member 16 and the liner 17 are used for sound insulation.

Regarding the provision of the gasket 17 and the sound absorbing member 16, the following embodiments can be considered.

[First Embodiment] As shown in FIG. 3, the soundproof package 1 of the first embodiment has a folding sheet 15 on the periphery of the door main body 14 (the outer periphery of the door 4), and the folding sheet 15 is folded back toward the package main body 3 and formed in In the direction intersecting the surface of the package body 3. The folding piece 15 is provided on the four sides of the upper side, the lower side, the left side, and the right side of the door 4 as described above. Furthermore, the four sides of the folded-back piece 15 on the package body 3 side (the folded-back front end) are all located on the same plane, and the gasket 17 is mounted on the end on the same plane.

In addition, the gasket 17 provided in the soundproof package 1 of the first embodiment is provided at the end of the return flap 15 on the same plane, and is provided on the entire opening 2 except for the part where the hinge 9 is provided. week. That is, in the soundproof package 1 of this embodiment, although the sound absorbing member 16 is provided in the portion where the hinge 9 is provided, the gasket 17 is not provided.

Specifically, the gasket 17 is formed using a resin (member) having elasticity such as rubber. In addition, the gasket 17 is formed into a hollow structure, and can be elastically deformed when pressed toward the package body 3 side. If such an elastically deformable liner 17 occurs, even if there is a gap between the end of the turn-back piece 15 and the opening surrounding surface 13, the elastically deformed liner 17 can enter the gap and close the gap, which can prevent Noise leaks from the opening 2 to the outside.

On the other hand, the sound absorbing member 16 provided in the soundproof package 1 of the first embodiment is a member provided on the center side of the door than the folding piece 15, and when the opening 2 is closed by the door 4, it is By contacting the opening peripheral surface 13 to make the thickness thinner than in the open state, the gap between the opening peripheral surface 13 and the door 4 can be closed.

Specifically, the sound absorbing member 16 is a flexible and compressible member such as a foamable polyurethane foam material, and is attached to the center side (door center side) of the door main body 14 rather than the folding sheet 15. In FIG. 2, although the illustration of the sound absorbing member 16 is omitted, as described above, the sound absorbing member 16 is provided closer to the center of the door than the folding piece 15. In addition, it is preferable that the sound absorbing member 16 has a shape slightly larger than the “opening peripheral surface 13 ”formed around the opening 2 and is provided so as to substantially cover the back surface of the door 4. That is, the sound absorbing member 16 preferably covers the entire center of the door main body 14. However, if the part where the sound absorbing member 16 is not installed is only a part of the central side of the door main body 14, the sound absorption may not decrease much. Therefore, the soundproof package 1 of the present invention also includes the case where the sound absorbing member 16 is not provided on the entire surface of the door center side, in other words, the case where the sound absorbing member 16 is provided on a part of the door center side.

In addition, when the opening 2 is closed by the door 4, the sound absorbing member 16 preferably has a thickness that is sandwiched between the door 4 and the opening 2 so that the sound absorbing member 16 can be compressed. Specifically, the sound absorbing member 16 is preferably formed to be thicker than the thickness of the door main body 14 to the end of the folding piece 15, in other words, the thickness of the door 4 in the front-rear direction. If the sound absorbing member 16 is formed with such a thickness, the end surface of the sound absorbing member 16 on the package body 3 side becomes more protruding than the end of the gasket 17 on the package body 3 side, and the opening 2 becomes In the closed state, the sound absorbing member 16 is also compressed as the gasket 17 contacts the opening peripheral surface 13 in a surface state. Therefore, the sound absorbing member 16 can fill the gap between the opening peripheral surface 13 and the door 4, and achieve a stable performance. Sound insulation properties (sound absorption).

As shown in the above-mentioned first embodiment, if the sound insulation structure 5 provided with both the gasket 17 and the sound absorbing member 16 is provided between the package body 3 and the door 4, the gasket 17 and the sound absorbing member 16 can surely prevent the opening from the opening. The gap of the part 2 allows noise to leak, so it is possible to provide a sound insulation package 1 capable of reliably isolating the noise of the noise source.

In addition, the soundproof package 1 of the first embodiment adopts a simple structure in which a liner 17 is provided at the front end of the return flap 15 of the door 4, so that it does not cause an increase in manufacturing costs and assembly work.

Therefore, there is no increase in manufacturing cost and assembly work, and even if the size is increased, the sound leakage from the gap to the outside can be reliably prevented.

[Second Embodiment] The soundproof package 1 of the second embodiment is the same as the soundproof package 1 of the first embodiment in that it has a folding piece 15 on the periphery of the door main body 14.

The soundproof package 1 of the second embodiment is different from the first embodiment in that the folding sheet 15 provided on the periphery of the door body 14 is not folded back only once toward the package body 3 side, but is turned toward the package The front end (turned-back end) of the main body 3 side folded once again is further folded back in a direction parallel to the opening peripheral surface 13 (performs the second turn-back).

That is, the folding piece 15 provided in the soundproof package 1 of the second embodiment has a first folding piece 18 and a second folding piece 19; the first folding piece 18 is on the periphery of the door body 14 and is directed toward the package The main body 3 is folded back and formed in a direction intersecting the surface of the package body 3; the second folding piece 19 is formed at the front end of the first folding piece 18 and is folded back toward the width direction inner side and formed in parallel with the opening peripheral surface 13 In the direction. Furthermore, the gasket 17 is attached to the second folding piece 19, and the sound absorbing material is formed to be thicker than the thickness from the door main body 14 to the second folding piece 19.

Moreover, the installation place of the said 1st and 2nd turn-back pieces 18, 19 is limited to the part where the hinge 9 is not installed (C-C line cross section of FIG. 2). At the location where the hinge 9 is installed (the B-B line cross-section in FIG. 2), the second folding piece 19 cannot be installed due to the hindrance of the hinge 9, and the aforementioned gasket 17 cannot be installed.

Hereinafter, the cross-sectional structure of the package body 3 and the door 4 will be described with respect to the part where the hinge 9 is provided and the part where the hinge 9 is not provided.

4A and 4B show a cross-section taken along the line B-B in FIG. 2, and show the cross-sectional structure of the package main body 3 and the door 4 where the hinge 9 is provided in the soundproof package 1 of the second embodiment described above. Fig. 4A shows the state that the door 4 is opened, and Fig. 4B shows the state that the door 4 is closed.

As shown in FIG. 4A and FIG. 4B, the package main body 3 has the aforementioned frame 7 around the opening 2. The frame 7 is a member having a square frame shape with the opening 2 in the center, and is provided to surround the periphery of the opening 2. The side (outer peripheral side) of the frame 7 away from the opening 2 is arranged at a position that is flush with the surface of the door body 14, and the side of the frame 7 close to the opening 2 is recessed toward the package body 3 side. That is, the frame portion 7 has an opening peripheral surface 13 at a position farther back than the surface of the door main body 14. Furthermore, the above-mentioned hinge 9 is provided on the surface 13 around the opening.

The hinge 9 has a first member 9 a attached to the opening peripheral surface 13 and a second member 9 b attached to the door main body 14. The first member 9a and the second member 9b of the hinge 9 are rotatable about an axis oriented in the vertical direction.

The door 4 has a first folded piece 18 that is folded back toward the package body 3 side at the periphery of the door body 14 and formed in a direction intersecting the surface of the package body 3. The end of the first return flap 18 on the side of the package body 3 ends on the way to the opening peripheral surface 13, and the gasket 17 is not attached to this end.

In addition, a sound absorbing member 16 is provided on the door main body 14 on the center side of the door than the folding piece 15 is. When the opening 2 is closed by the door 4, the sound absorbing member 16 changes the thickness by contacting the opening peripheral surface 13 It must be thinner than in the open state. Specifically, the opening peripheral surface 13 is extended to a position closer to the center of the door than the position where the hinge 9 is provided, and the sound absorbing member 16 is brought into contact with the extended portion.

At the location where the hinge 9 is provided, the sound absorbing member 16 is provided, but the gasket 17 is not provided. On the other hand, in a location where the hinge 9 is not provided, both the sound absorbing member 16 and the gasket 17 are provided.

5A and 5B show a cross-section taken along the line C-C in FIG. 2 and show the cross-sectional structure of the package main body 3 and the door 4 in the soundproof package 1 of the second embodiment where the hinge 9 is not provided. Fig. 5A shows the state that the door 4 is opened, and Fig. 5B shows the state that the door 4 is closed.

As shown in FIGS. 5A and 5B, the package body 3 in the part where the hinge 9 is not provided has the above-mentioned frame 7 around the opening 2 in the same way as the part where the hinge 9 is provided. , There is an opening peripheral surface 13 at a position further inward than the surface of the door main body 14.

On the other hand, on the periphery of the door body 14, not only the first folding piece 18 that is folded back toward the package body 3 side and formed in a direction intersecting the surface of the package body 3, but also the first folding piece 18 is formed. The front end of the second turn-back piece 19 is folded back toward the width direction inner side to form a second turn-back piece 19 in a direction parallel to the opening peripheral surface 13, and a gasket 17 is attached to the second turn-back piece 19.

The gasket 17 provided in the soundproof package 1 of the second embodiment uses a rubber gasket having a mounting portion 20 and a hollow portion 21. The mounting portion 20 is mounted on the second folding piece 19 in a pinched state. The hollow portion 21 is to make the inside hollow for easy deformation.

In addition, the above-mentioned second turn-back 19, when the turn-back angle of the first turn-back 18 is 90°, instead of further folding back 270° (that is, -90°) from the lower end of the first turn-back 18, it is turned back from the first The lower end of the folded-back piece 18 is further folded back by 90° (U-shaped type).

That is, the sound-absorbing member 16 and the spacer 17 are provided at the location where the hinge 9 is not provided, and the sound-insulating structure 5 including both the spacer 17 and the sound-absorbing member 16 is arranged. If such a sound insulation structure 5 is provided between the package body 3 and the door 4, the gasket 17 and the sound absorbing member 16 can reliably prevent the noise from leaking from the gap of the opening 2, and therefore can provide a reliable noise source. Sound insulation package 1 for ground sound insulation.

In particular, when there is a door 4 that is opened and closed by a hinge 9, a gap is likely to occur between the door 4 that is opened and closed by the hinge 9 and the package body 3 because the door 4 will tilt due to its own weight in any case. . Therefore, the soundproof package 1 of the second embodiment is particularly suitable when the hinge 9 which is prone to gaps is used.

In addition, in the soundproof package 1 of the second embodiment, a gasket 17 is provided on the second folding piece 19 formed in a direction parallel to the opening peripheral surface 13, and the gasket is arranged between members facing each other in a planar state 17, therefore, the sound insulation effect of the spacer 17 can be more effectively exerted.

In addition, the soundproof package 1 of the second embodiment is the same as the first embodiment, and has a simple structure in which a gasket 17 is provided at the front end of the return flap 15 of the door 4, so that manufacturing costs and assembly work are not increased.

Therefore, the manufacturing cost and assembly work are not increased, and even if the size is increased, the sound leakage from the gap to the outside can be reliably prevented.

The embodiment disclosed this time is only an illustration and not a limitation. In particular, matters not explicitly disclosed in the embodiment disclosed this time, such as operating conditions, working conditions, various parameters, the size, weight, and volume of the structure, are within the scope of general knowledge. A value that can be easily imagined by ordinary knowledgeable persons can be used.

1: Sound insulation package 2: opening 3: Package body 4: door 5: Sound insulation structure 6: Base 7: Frame 8: Top plate 9: Hinge 9a: The first member of the hinge 9b: The second member of the hinge 10: Fixed part 11: Vertical frame 12: Horizontal frame 13: Surface around the opening 14: The main body of the door 15: Fold back 16: Sound-absorbing component 17: liner 18: The first fold 19: The second fold 20: Installation Department 21: Hollow part

[Fig. 1] is an external view of the soundproof package of this embodiment. [Fig. 2] An enlarged view of part A of Fig. 1, showing the opening of the soundproof package. Fig. 3 is a schematic diagram showing how the cross-sectional structure of the soundproof package changes as the opening is opened and closed (first embodiment). [Fig. 4A] is a schematic diagram showing a cross-section taken along the line B-B in Fig. 2 and showing the cross-sectional structure of the part provided with the hinge in the open state (the second embodiment). [Fig. 4B] is a schematic diagram showing a cross-section taken along the line B-B in Fig. 2 and showing the cross-sectional structure of the part provided with the hinge in the closed state (the second embodiment). [Fig. 5A] is a schematic diagram showing a cross-section taken along the line C-C in Fig. 2 and showing the cross-sectional structure of the part where the hinge is not provided in the open state (the second embodiment). [Fig. 5B] is a schematic diagram showing a cross-section taken along the line C-C in Fig. 2, showing the cross-sectional structure of the part where the hinge is not provided in the closed state (the second embodiment).

2: opening

3: Package body

4: door

5: Sound insulation structure

7: Frame

13: Surface around the opening

14: The main body of the door

15: Fold back

16: Sound-absorbing component

17: liner

Claims (4)

A soundproof package is provided with: a package body that houses a noise source and has an opening, a door that can close the opening of the package body, and is arranged between the package body and the door and can be A sound-insulating structure for sound insulation of the noise of the noise source, characterized in that the opening surroundings are formed on the same plane around the opening, and a return flap is provided on the outer peripheral side of the door, and the return flap is directed toward the aforementioned opening. The package body side is folded back and the ends of the package body side are all located on the same plane. The sound insulation structure has an elastically deformable cushion and a compressible sound-absorbing member. The cushion is provided on the back-folded sheet. The main body side of the package is in contact with the surrounding surface of the opening when the opening is closed by the door. The sound absorbing member is arranged closer to the center of the door than the folding piece. When it is in the closed state, the thickness becomes thinner than that in the open state by contacting the surface around the opening. The soundproof package according to claim 1, wherein the turn-back sheet has a first turn-back sheet and a second turn-back sheet, and the first turn-back sheet is provided on the periphery of the door main body provided in the center portion of the door, and is protected by Folded back toward the package body side and formed in a direction that intersects the surface of the package body, the second folding piece is at the front end of the first folding piece and facing The widthwise inner side is folded back and is formed in a direction parallel to the opening peripheral surface, the spacer is attached to the second folding piece, and the sound absorbing member is formed to be thicker than the thickness from the door main body to the second folding piece. The soundproof package according to claim 1 or 2, wherein a hinge that rotatably pivots the door with respect to the main body of the package is provided on one end side in the width direction of the door. On the other end side, a fixing part is provided for fixing the door to the main body of the package. The hinges are provided on the upper and lower sides of the door. The surrounding surface of the opening is extended to be greater than the position where the hinges of the door are provided. Close to the central side of the door. The soundproof package according to claim 1 or 2, wherein a rubber gasket having a mounting part and a hollow part is used as the gasket, the mounting part is mounted on the second folding piece in a pinched state, and the hollow The inside of the department becomes hollow.

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