Soundproof panel

Abstract

To provide a soundproof panel body that can minimize the reduction in transmission loss at specific frequencies while keeping the weight increase to a minimum by effectively arranging soundproofing plates. [Solution] A soundproof panel body comprising a panel frame 70 composed of a pair of vertical frames extending in the vertical direction and a pair of horizontal frames 66, 68 extending in the horizontal direction, a single-sided surface plate 72 disposed on one side of the panel frame 70, a second-sided surface plate 74 disposed on the other side of the panel frame 70, and a soundproof plate structure 76 attached to the inner surfaces of the single-sided surface plate 72 and the second-sided surface plate 74. The soundproof plate structure 76 is composed of at least three or more soundproof plates, for example, first to fourth soundproof plates 78 to 84, and these soundproof panels 78 to 84 are arranged in a staggered pattern in the vertical direction on the inner surfaces of the single-sided surface plate 72 and the second-sided surface plate 74.

Description

TECHNICAL FIELD

[0001] The present invention relates to a soundproof panel body used for soundproof doors and the like. BACKGROUND ART

[0002] As a soundproof panel body, there has been proposed a structure in which a soundproof plate is disposed on the inner surface of a surface plate (or a surface plate plus a back surface plate) of a panel main body (for example, see Patent Document 1). This soundproof panel body includes a rectangular panel frame body, a surface plate is disposed on the front surface side of the panel frame body, and a back surface plate is disposed on the back surface side thereof. Further, a soundproof plate is attached to the inner surface of the surface plate, the soundproof plate is composed of a plurality of plate pieces, and the plurality of plate pieces are divided and adhesively fixed to the inner surface of the surface plate. When a soundproof plate is also provided on the back surface plate, a plurality of plate pieces are divided and adhesively fixed to the inner surface of the back surface plate.

[0003] In this soundproof panel body, since the soundproof plate (the plurality of plate pieces) is provided on substantially the entire inner surface of the surface plate (and the back surface plate), a soundproof effect can be obtained by this soundproof plate. On the surface plate side, the free vibration of each plate piece and the free vibration of the surface plate itself combine to form a composite vibration, and on the back surface plate side, the free vibration of each plate piece and the free vibration of the back surface plate itself also combine to form a composite vibration, as a result, it is possible to prevent the transmission loss from being extremely reduced at a specific frequency. PRIOR ART DOCUMENTS PATENT DOCUMENTS

[0004] PATENT DOCUMENT 1 Japanese Unexamined Patent Application Publication No. Hei 7-331763 SUMMARY OF THE INVENTION PROBLEMS TO BE SOLVED BY THE INVENTION

[0005] However, conventional soundproof panels have the following problems that need to be solved. For example, in a soundproof panel with soundproofing plates (multiple plate pieces) on the surface plate side, the effect of having soundproofing plates can be obtained on the surface plate side, but this soundproofing effect cannot be obtained on the back plate side. On the other hand, in a soundproof panel with soundproofing plates (multiple plate pieces) on both the surface plate side and the back plate side, the effect of having soundproofing plates can be obtained on both the surface plate side and the back plate side, but because soundproofing plates are present on both the surface plate side and the back plate side, the weight of the soundproof panel becomes heavy, reducing the workability of transporting and installing it.

[0006] The object of the present invention is to provide a soundproofing panel that can reduce the decrease in transmission loss at specific frequencies while suppressing an increase in weight by effectively arranging soundproofing plates. [Means for solving the problem]

[0007] The soundproof panel body of the present invention comprises a panel frame body composed of a pair of vertical frames extending in the vertical direction and a pair of horizontal frames extending in the horizontal direction, a one-sided surface plate disposed on one side of the panel frame body, a other-sided surface plate disposed on the other side of the panel frame body, and a soundproof plate structure provided on the inner surfaces of the one-sided surface plate and the other-sided surface plate, The soundproofing plate structure is characterized in that it is composed of at least three or more soundproofing plates, and the multiple soundproofing plates are arranged in a staggered pattern in the vertical or horizontal direction on the inner surfaces of the one-sided surface plate and the other-sided surface plate.

[0008] In such a soundproof panel, it is desirable to arrange the adjacent end of one of a pair of staggered adjacent soundproof plates so that it aligns with the adjacent end of the other soundproof plate in the vertical (or horizontal) direction. With this configuration, a soundproof plate from the other surface plate is present on the opposite side of any area on one surface plate where a soundproof plate is absent, and a soundproof plate from the one surface plate is present on the opposite side of any area on the other surface plate where a soundproof plate is absent. As a result, on the one surface plate side, the vibration becomes a combination of the free vibration of the soundproof plate and the free vibration of the one surface plate itself, and on the back plate side, the vibration becomes a combination of the free vibration of the soundproof plate and the free vibration of the back plate itself. This makes it possible to suppress a large decrease in sound transmission loss while keeping the increase in weight of the soundproof plate to a minimum.

[0009] In such a soundproof panel, at least one of the multiple soundproof plates can be made up of two or more plate members, which makes it possible to use small plate members.

[0010] Furthermore, this soundproofing plate structure can be composed of, for example, first to fourth soundproofing plates arranged in order in the vertical direction. In this case, the first soundproofing plate can be attached to the inner surface of one side surface plate, the second soundproofing plate to the inner surface of the other side surface plate, the third soundproofing plate to the inner surface of one side surface plate, and the fourth soundproofing plate to the inner surface of the other side surface plate. [Effects of the Invention]

[0011] According to the soundproof panel body of the present invention, the soundproof plate structure for soundproofing the soundproof panel body is composed of at least three or more soundproof plates, and these soundproof plates are arranged in a staggered pattern in the vertical (or horizontal) direction on the inner surfaces of one side surface plate and the other side surface plate. As a result, soundproof plates are present on both the inner surfaces of one side surface plate and the other side surface plate, and on the side of the one side surface plate, the vibration is a combination of the free vibration of the soundproof plate and the free vibration of the one side surface plate itself, and on the side of the back plate, the vibration is a combination of the free vibration of the soundproof plate and the free vibration of the back plate itself. This makes it possible to suppress a large decrease in sound transmission loss while suppressing an increase in the weight of the soundproof plate. [Brief explanation of the drawing]

[0012] [Figure 1] A front view showing an example of a door structure including a soundproof door according to a first embodiment to which a soundproof panel body according to the present invention is applied. [Figure 2] A longitudinal section view taken along line II-II in Figure 1. [Figure 3] Cross-sectional view along line III-III in Figure 1. [Figure 4] A vertical cross-sectional view showing the soundproof door in Figure 1. [Figure 5] Cross-sectional view shown in Figure 4, along the VV line. [Figure 6] A vertical cross-sectional view showing a soundproof door according to the second embodiment. [Figure 7] Cross-sectional view along line VII-VII in Figure 6. [Figure 8] A vertical cross-sectional view showing a soundproof door according to the third embodiment. [Figure 9] Data showing the test results of the sound transmission loss test for the soundproof door in the example. [Figure 10] Data showing the test results of the sound transmission loss test for the comparative example soundproof door. [Modes for carrying out the invention]

[0013] Hereinafter, various embodiments of the soundproof panel body according to the present invention will be described with reference to the accompanying drawings. In these embodiments, the soundproof panel body according to the present invention is applied to a soundproof door.

[0014] With reference to Figures 1 to 3, an example of a door structure including the soundproof door of the first embodiment will be described. The illustrated door structure includes a door frame 2 and a soundproof door 6 disposed in an opening 4 of the door frame 2, and the door tail side end of the soundproof door 6 is attached to the door frame 2 so as to be openable and closable as will be described later. The illustrated door frame 2 includes a door leading side vertical frame 8 and a door tail side vertical frame 10 extending in the vertical direction (in this example, the longitudinal direction of the opening 4), the upper end portions of the door leading side vertical frame 8 and the door tail side vertical frame 10 are connected by an upper frame 14, the lower end portions thereof are connected by a lower frame 16, and the upper frame and the lower frame 16 extend in the lateral direction (in this example, the transverse direction of the opening 4). The door leading side vertical frame 8, the door tail side vertical frame 10, the upper frame 14 and the lower frame 16 define the opening 4 leading to and from the indoor side, and are formed in a rectangular shape in this example.

[0015] An upper pivot pin 18 is provided at the upper end portion on the door tail side of the soundproof door 6, the upper pivot pin 18 is rotatably received in an upper receiving portion provided at the door tail side end portion of the upper frame 14, a lower pivot pin 20 is provided at the lower end portion on the door tail side thereof, and the lower pivot pin 20 is rotatably received in a lower receiving portion provided on the lower frame 16. The upper pivot pin 18 and the lower pivot pin 20 constitute a pivot axis when the soundproof door 6 is pivoted, and the soundproof door 6 is opened and closed around this pivot axis. When the soundproof door 6 is in the closed state shown in Figures 1 to 3, it closes the opening 4 of the door frame 2, and when it is in the open state (a state pivoted about 90 degrees to the outdoor side from the closed state in Figure 3), the opening 4 of the door frame 2 is opened although not illustrated.

[0016] Next, the door frame 2 will be further described with reference to Figures 2 and 3. The door tail side vertical frame 10 will be described mainly with reference to Figure 3. The door tail side vertical frame 10 is constituted by a bent plate-shaped member, and has a side surface portion 22 extending in the thickness direction of the door frame 2 (the vertical direction in Figure 3) to define the door tail side of the opening 4, and an inner protruding portion 26 extending in the width direction from the side surface portion 22 toward the door leading side vertical frame 8, and this inner protruding portion 26 is provided at an intermediate portion in the thickness direction of the side surface portion 22. The door tail side vertical frame 10 further has a closed side portion 28 extending in the width direction from the closed side end of the side surface portion 24 toward the door leading side vertical frame 8, and a resin-made airtight member 30 is mounted on this closed side portion 28.

[0017] Further, similarly to the door tail side vertical frame 10, the door leading side vertical frame 8 is constituted by a bent plate-shaped member, and has a side surface portion 32 extending in the thickness direction of the door frame 2 to define the door leading side of the opening 4, and a closing portion 34 extending in the width direction from the closed end of this side surface portion 32 toward the door tail side vertical frame 10, and a resin-made airtight member 36 is mounted on this closing portion 34. In this embodiment, a recess 38 is provided on the outdoor side of the side surface portion 32 of the door leading side vertical frame 8. When the soundproof door 6 is in the closed state, as shown in Figure 3, the door leading protrusion 40 of this soundproof door 6 is accommodated in the recess 38 of the door leading side vertical frame 8.

[0018] Next, the upper frame 14 will be described mainly with reference to Figure 2. The illustrated upper frame 14, similarly to the door tail side vertical frame 10 and the door leading side vertical frame 8, is constituted by a bent plate-shaped member, and has an upper side surface portion 42 extending in the thickness direction of the door frame 2 to define the upper side of the opening 4, and an upper closing portion 44 extending in the vertical direction from the closed end of this upper side surface portion 42 toward the lower frame 16, and a resin-made airtight member 46 is mounted on this upper closing portion 44. Further, similarly to the upper frame 14, the illustrated lower frame 16 is constituted by a bent plate-shaped member, and has a lower side surface portion 48 extending in the thickness direction of the door frame 2 to define the lower side of the opening 4, and a lower closing portion 50 extending in the vertical direction from the closed end of this lower side surface portion 48 toward the upper frame 14, and a resin-made airtight member 52 is mounted on this lower closing portion 50.

[0019] As can be seen from Figures 2 and 3, when the soundproof door 6 is closed, these airtight materials 30, 36, 46, and 52 adhere tightly to the surface of the soundproof door 6 (the interior surface), and the space between the interior space 54 and the soundproof door 6 is sealed by these airtight materials 30, 36, 46, and 52.

[0020] Next, the illustrated soundproof door 6 will be described with reference to Figures 4 and 5, along with Figures 2 and 3. This soundproof door 6 has a pair of vertical frames extending in the vertical direction (up and down in Figures 2 and 4, and perpendicular to the plane of the paper in Figures 3 and 5) (i.e., the vertical frame 62 on the door edge side and the vertical frame 64 on the door tail side) and a pair of horizontal frames extending in the horizontal direction (perpendicular to the plane of the paper in Figures 2 and 4, and horizontal in Figures 3 and 5) (i.e., the upper horizontal frame 66 and the lower horizontal frame 68). The upper ends of the pair of vertical frames 62 and 64 are connected by the upper horizontal frame 66, and the lower ends of these vertical frames 62 and 64 are connected by the lower horizontal frame 68. The vertical frames 62 and 64 and the horizontal frames 66 and 68 constitute a rectangular panel frame 70.

[0021] In this embodiment, the vertical frame 62 on the door edge side has a main body portion 62a, an outward projection portion 62b extending outward from one end of the main body portion 62a, and an inward projection portion 62c extending from the other end of the main body portion 62a toward the vertical frame 64 on the door edge side. The vertical frame 64 on the door edge side has a main body portion 64a facing the main body portion 62a of the vertical frame 62, and a pair of outward projection portions 64b and 64c extending outward from both ends of the main body portion 64, and the outward projection portion 64c is provided with an inclined projection portion 64d that extends inclined from its tip.

[0022] Furthermore, the upper horizontal frame 66 has a main body portion 66a and a pair of inwardly extending portions 66b and 66c extending inward from both ends of the main body portion 66a. The lower horizontal frame 68 has a main body portion 68a facing the main body portion 66a of the upper horizontal frame 66, and a pair of inwardly extending portions 68b and 68c extending inward from both ends of the main body portion 68a. The pair of vertical frames 62 and 64 and the pair of horizontal frames 66 and 68 are formed, for example, by bending a metal plate such as a steel plate.

[0023] A one-sided surface plate 72 is provided on one side (for example, the indoor side) of the panel frame 70 so as to cover that one side of the panel frame 70, and a other-sided surface plate 74 is provided on the other side (for example, the outdoor side) so as to cover the other side of the panel frame 70. These one-sided surface plate 72 and other-sided surface plate 74 are formed from metal plates such as steel plates.

[0024] In this configuration, the one-sided surface plate 72 is fixed to the inner protrusion 62c and part of the main body 62a of the door-side vertical frame 62, the outer protrusion 64c and inclined projection 64d of the door-side vertical frame 64, the inner protrusion 66c and part of the main body 66a of the upper horizontal frame 66, and the inner protrusion 68c and part of the main body 68a of the lower horizontal frame 68, for example, by adhesive. The other-sided surface plate 74 is fixed to the outer protrusion 62b and the remaining part of the main body 62a of the door-side vertical frame 62, the outer protrusion 64b and inclined projection 64d of the door-side vertical frame 64, the inner protrusion 66b and the remaining part of the main body 66a of the upper horizontal frame 66, and the inner protrusion 68b and the remaining part of the main body 68a of the lower horizontal frame 68, for example, by adhesive. The portion of the main body portion 62a of the vertical frame 62 between one side surface plate 72 and the other side surface plate 74 is covered by a cover member 75.

[0025] In this soundproof door 6, a soundproof plate structure 76 is further provided in relation to the one-sided surface plate 72 and the other-sided surface plate 74. Referring primarily to Figures 4 and 5, the illustrated soundproof plate structure 76 consists of four soundproof panels, the first to fourth soundproof panels 78, 80, 82, and 84, and the first to fourth soundproof panels 78 to 84 are arranged in a staggered pattern vertically (up and down in Figure 4) on the inner surfaces of one-sided surface plate 72 and the other-sided surface plate 74.

[0026] In this configuration, the first soundproofing plate 78 is arranged on the inner surface of one side surface plate 72 so as to be in contact with the inner projection 66c of the upper horizontal frame 66, and the second soundproofing plate 80 is arranged on the inner surface of the other side surface plate 74 so as to be continuous with the lower end of the first soundproofing plate 78 (in other words, so that the lower end of the first soundproofing plate 78 and the upper end of the second soundproofing plate 80 coincide in the thickness direction of the door). Furthermore, the third soundproofing plate 82 is positioned on the inner surface of one-sided surface plate 72 so as to extend from the lower end of the second soundproofing plate 80 (in other words, so that the lower end of the second soundproofing plate 80 and the upper end of the third soundproofing plate 82 coincide in the thickness direction of the door), and the fourth soundproofing plate 84 is positioned on the inner surface of the other-sided surface plate 74 so as to extend from the lower end of the third soundproofing plate 82 (in other words, so that the lower end of the third soundproofing plate 82 and the upper end of the fourth soundproofing plate 82 coincide in the thickness direction of the door), with the lower end of the fourth soundproofing plate 84 extending to the vicinity of the inner projection 68b of the lower horizontal frame 68. With this configuration, there are no soundproofing plates on the inner surface of the other-sided surface plate 74 facing the first and third soundproofing plates 78 and 82, and there are no soundproofing plates on the inner surface of one-sided surface plate 72 facing the second and fourth soundproofing plates 80 and 84.

[0027] These first to fourth soundproofing plates 78 are formed from a metal plate such as a steel plate and are bonded and fixed to the inner surfaces of the one-sided surface plate 72 and the other-sided surface plate 74, for example, by adhesive. In this embodiment, the first and third soundproofing plates 78 and 82 are provided on the inner surface of the one-sided surface plate 72, and the second and fourth soundproofing plates 80 and 84 are provided on the inner surface of the other-sided surface plate 74. However, conversely, the first and third soundproofing plates 78 and 82 may be provided on the inner surface of the other-sided surface plate 74, and the second and fourth soundproofing plates 80 and 84 may be provided on the inner surface of the one-sided surface plate 72.

[0028] In this embodiment, the upper first soundproofing plate 78 (or second soundproofing plate 80, third soundproofing plate 82) and the lower second soundproofing plate 80 (or third soundproofing plate 82, fourth soundproofing plate 84) are configured to coincide with the thickness direction of the door. However, the same effect can be achieved even if the first soundproofing plate 78 (or second soundproofing plate 80, third soundproofing plate 82) and the lower second soundproofing plate 80 (or third soundproofing plate 82, fourth soundproofing plate 84) are configured to overlap slightly (for example, about 0 to 20 mm) in the thickness direction of the door, or to be separated slightly (for example, about 0 to 20 mm) in the thickness direction of the door.

[0029] A core material 86 (see Figure 3) is housed in the internal space within the panel frame 70, that is, the internal space defined by the vertical frames 62, 64, the horizontal frames 66, 68, the one-sided surface plate 72, and the other-sided surface plate 74. For example, a honeycomb structure is used as such a core material 86. Note that in Figures 2, 4, and 5, this core material 86 is omitted for the sake of clarity.

[0030] In this first embodiment, an operating / opening / closing mechanism 88 (see Figure 1) is provided on the leading edge side of the soundproof door 6. By operating this operating / opening / closing mechanism 88, the soundproof door 6 is opened and closed around the upper pivot pin 18 and the lower pivot pin 20. An auxiliary frame 90 is provided around the operating / opening / closing mechanism 88, and the internal mechanism (not shown) of the operating / opening / closing mechanism 88 is housed in a housing space within this auxiliary frame 90.

[0031] The soundproof door 6 of this first embodiment has the following features. Firstly, since the first to fourth soundproofing plates 78 to 84 are arranged in a staggered pattern on the inner surfaces of the one-sided surface plate 72 and the other-sided surface plate 74, an excellent soundproofing effect can be obtained by these first to fourth soundproofing plates 78 to 84. On the side of the one-sided surface plate 72, the vibration is a combination of the free vibration of the first and third soundproofing plates 78 and 82 and the free vibration of the one-sided surface plate 72 itself, and on the side of the back surface plate 74, the vibration is a combination of the free vibration of the second and fourth soundproofing plates 80 and 84 and the free vibration of the back surface plate 74 itself. As a result, a large reduction in sound transmission loss can be suppressed, and the sound insulation performance can be improved.

[0032] Secondly, since the first and third soundproofing plates 78 and 82 of the first to fourth soundproofing plates 78 to 84 arranged in a staggered pattern are attached to the one-sided surface plate 72, and the second and fourth soundproofing plates 80 and 84 of those plates are attached to the other-sided surface plate 74, the number of soundproofing plates can be reduced despite the structure providing soundproofing plates on both the one-sided surface plate 72 and the other-sided surface plate 74. As a result, the soundproof door 6 can be made lighter and easier to handle.

[0033] Next, a second embodiment of the soundproof door will be described with reference to Figures 6 and 7. In this second embodiment of the soundproof door, some of the first to fourth soundproof plates are composed of multiple plate members. In the following embodiments, the same numbers are used for members that are the same as those in the first embodiment, and their descriptions are omitted.

[0034] In Figure 6, in this embodiment, the first soundproof plate 78B of the soundproof plate structure 76B is composed of two plate members 88 divided vertically (i.e., in the longitudinal direction), and these plate members 88 are arranged to contact each other vertically and are bonded and fixed to the inner surface of the one-sided surface plate 72. Furthermore, as shown in Figure 7, the third soundproof plate 82B is composed of two plate members 90 divided horizontally, and these plate members 90 are arranged to contact each other horizontally and are bonded and fixed to the inner surface of the one-sided surface plate 72.

[0035] Furthermore, as shown in Figures 6 and 7, the fourth soundproofing plate 84B is composed of four plate members 92 divided in the vertical and horizontal directions, and these four plate members 92 are arranged to be in contact with each other in the vertical and horizontal directions and are bonded and fixed to the inner surface of the other side surface plate 74.

[0036] In this embodiment, the first, third, and fourth soundproofing plates 78B, 82B, and 84B are divided into two or four parts. However, any one or two of the four soundproofing plates, or any three or all of the soundproofing plates, may be divided, and the number of divisions can be two or more as appropriate.

[0037] In this second embodiment, the basic configuration is the same as in the first embodiment described above, and the first to fourth soundproofing plates 78B to 84B are arranged in a staggered pattern in the vertical direction on the inner surfaces of the one-sided surface plate 72 and the other-sided surface plate 74, so the same effects and advantages as in the first embodiment are achieved.

[0038] Next, a third embodiment of the soundproof door will be described with reference to Figure 8. In this third embodiment of the soundproof door, the soundproof plate structure consists of six soundproof plates. In Figure 8, this soundproof plate structure 76C consists of six soundproof plates, namely the first to sixth soundproof plates 102, 104, 106, 108, 110, and 112, and the first to sixth soundproof plates 102 to 112 are arranged in a staggered pattern in the vertical direction on the inner surfaces of the one-sided surface plate 72 and the other-sided surface plate 74. Specifically, the first, third, and fifth soundproof plates 102, 106, and 110 are adhesively fixed to the inner surface of the one-sided surface plate 72, and the second, fourth, and sixth soundproof plates 104, 108, and 112 are adhesively fixed to the inner surface of the other-sided surface plate 74.

[0039] In this third embodiment, the soundproofing plate structure is composed of six soundproofing plates, but it may also be composed of four soundproofing plates as in the first and second embodiments. By composing these soundproofing plates from at least three or more soundproofing plates, these soundproofing plates can be arranged in a staggered pattern.

[0040] In this third embodiment, the basic configuration of arranging multiple soundproofing plates in a staggered pattern in the vertical direction is the same as in the first embodiment, and therefore the same effects and advantages as in the first embodiment described above are achieved.

[0041] Although the present invention has been described above by applying a soundproof panel body to a soundproof door, the present invention is not limited to such embodiments, and various changes and modifications are possible without departing from the scope of the present invention.

[0042] For example, in the embodiment described above, multiple soundproofing plates are arranged in a staggered pattern vertically (up and down) on the inner surfaces of one surface plate and the other surface plate. However, the same effect can be obtained by arranging them in a staggered pattern horizontally, rather than being limited to the vertical direction.

[0043] [Examples and Comparative Examples] To confirm the effectiveness of the soundproof door to which the soundproof panel body of the present invention is applied, the following sound insulation performance test (JIS A 4702, 5. Performance) was conducted. In this sound insulation performance test, it was determined whether the sound transmission loss at 16 points from 125 Hz to 4000 Hz conformed to the T3 grade line.

[0044] As an example, a sound insulation performance test was conducted using a soundproof door in the configuration shown in Figures 1 to 5 (with the first to fourth sound insulation plates arranged in a staggered pattern on the inner surfaces of one and the other surface plates). The soundproof door used in this sound insulation performance test had a sample area of ​​2.23 m². 2 The soundproof door was constructed using 0.6mm thick steel plates for one side surface plate and the other side surface plate, and 1.6mm thick steel plates for the first to fourth soundproof plates. The vertical dimensions of the first to fourth soundproof plates were 350mm for the first soundproof plate, 460mm for the second soundproof plate, 730mm for the third soundproof plate, and 540mm for the fourth soundproof plate.

[0045] The measurement results of the sound transmission loss in the sound insulation performance test of the soundproof door of this embodiment are shown in Figure 9. In Figure 9, the measurement results of the sound transmission loss of this embodiment are superimposed on the T-3 grade line, and it was determined whether or not it conformed to the T-3 grade line. As a result of this determination, it was confirmed that the soundproof door of this embodiment conforms to the T-3 grade even when a 1.6 mm thick steel plate is used as the sound insulation plate.

[0046] As a comparative example, a sound insulation performance test was conducted using a conventional soundproof door (with a single soundproof plate placed over almost the entire inner surface of the other side surface plate). The soundproof door used in this sound insulation performance test had a sample area of ​​2.27 m². 2 This was the case. In addition, a steel plate with a thickness of 0.6 mm, similar to the example, was used for the surface plate on one side and the surface plate on the other side of the soundproof door, and a steel plate with a thickness of 2.3 mm and a vertical size of 2080 mm was used as the soundproof plate.

[0047] The measurement results of the sound transmission loss in the sound insulation performance test of the comparative example's soundproof door are shown in Figure 10. In Figure 10, the measurement results of the sound transmission loss of this comparative example are shown side by side with the T-3 grade line, and it was determined whether or not it conformed to the T-3 grade line. It was confirmed that in the case of the structure of this comparative example, conforming to the T-3 grade is achieved by using a 2.3 mm thick steel plate as the soundproofing plate.

[0048] Based on the sound insulation performance test results described above, when attempting to meet the T-3 rating, the first to fourth soundproofing plates in the example could be 1.6 mm thick, but in the comparative example, a thickness of 2.3 mm was required to meet the rating. Comparing the weight of the soundproof doors, the comparative example weighed approximately 65 kg, while the example weighed approximately 55 kg. From this, it was confirmed that by arranging the first to fourth soundproofing plates in a staggered pattern, the weight can be reduced by approximately 10 kg while maintaining the same sound insulation performance as before. [Explanation of symbols]

[0049] 2 Door frame 6. Soundproof door 8. Vertical frame on the front side of the door. 10. Vertical frame on the door end side 14 Upper frame 16 Bottom frame 62,64 Vertical Frames 66,68 Horizontal frames 70 Panel frame 72 Single-sided surface plate 74 Other side surface plate 76, 76B, 76C Soundproofing plate structure 78, 78B, 80, 80B, 82, 82B, 84, 84B, 102, 104, 106, 108, 110, 112 Soundproofing Plate

Claims

1. A soundproof panel comprising a panel frame composed of a pair of vertical frames extending in the vertical direction and a pair of horizontal frames extending in the horizontal direction, a single-sided surface plate disposed on one side of the panel frame, a second-sided surface plate disposed on the other side of the panel frame, and a soundproof plate structure provided on the inner surfaces of the single-sided surface plate and the second-sided surface plate, The soundproofing plate structure is characterized in that it is composed of at least three or more soundproofing panels, and the multiple soundproofing panels are arranged in a staggered pattern in the vertical or horizontal direction on the inner surfaces of the one-sided surface plate and the other-sided surface plate.

2. The soundproof panel body according to claim 1, characterized in that the adjacent end of one of the pairs of soundproof panels that are adjacent to each other in a staggered pattern of the plurality of soundproof panels are arranged so as to coincide in the vertical direction or the horizontal direction.

3. The soundproof panel body according to claim 1, characterized in that at least one of the plurality of soundproof panels is composed of two or more plate members.

4. The soundproofing plate structure is characterized in that it is composed of first to fourth soundproofing panels arranged in order in the vertical direction, the first soundproofing plate is attached to the inner surface of the one-sided surface plate, the second soundproofing panel is attached to the inner surface of the other-sided surface plate, the third soundproofing plate is attached to the inner surface of the one-sided surface plate, and the fourth soundproofing plate is attached to the inner surface of the other-sided surface plate, as described in claim 1.

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