Ceiling soundproof device and soundproof structure of joint section

Abstract

To enable effective blocking of outside sounds and make it possible to absorb earthquake shakes without damages.SOLUTION: A ceiling soundproof device 1 provided at a joint section 2 between ceilings, comprises: a soundproof panel 6 that is fitted to one building frame 3 having a soundproof member 5 on one side face; the other soundproof panel 7 that is fitted to the other building frame 4 having a soundproof member 5 on one side face; an intermediate soundproof panel 8 that is arranged with its both edges roughly butting having a soundproof member 5 on one side face; and support means 9. Inclined plane-shape pressing parts are formed at protruding parts of the soundproof panel 6, 7 to press and reposition upwards or downwards the intermediate soundproof panel 8 in the case the joint section 2 is narrowed due to an earthquake and then to allow the intermediate soundproof panel 8 to recover to the normal position when the earthquake shakes end.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a ceiling soundproofing device installed between left and right building frames and a soundproofing structure for a joint portion. [Background technology]

[0002] In the past, buildings constructed near airports or factories have generally been fitted with soundproofing materials to block out noise generated by these facilities. However, in areas connecting the spaces between separate buildings on the left and right, or in walkways, etc., a distance has been set that takes into account the shaking of the buildings, so general soundproofing materials could not be installed.

[0003] As a soundproofing device installed between two structures, there is described an expansion joint that also has soundproofing performance, the expansion joint comprising: "an expansion joint installed in the gap between the two skeletons of a structure, the expansion joint comprising: at least two fire-resistant sheets; a plate-shaped vacuum insulation material sandwiched between the at least two fire-resistant sheets and having a shorter widthwise length than the at least two fire-resistant sheets; a retaining member that holds in an overlapped state at least two of the fire-resistant sheets extending outward from the widthwise ends of the vacuum insulation material in a laminate formed by overlapping the fire-resistant sheets and the vacuum insulation material; and a support member that supports, via the retaining member, the portions of the at least two fire-resistant sheets in the overlapped state in the laminate that are held by the retaining member to the skeleton" (Patent Document 1).

[0004] However, to achieve a soundproofing effect, it is necessary to efficiently absorb and reflect sound from outside, and a flexible sheet alone like this is unable to efficiently reflect sound, making it impossible to achieve a sufficient soundproofing effect. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2023-028495 A Summary of the Invention [Problem to be solved by the invention]

[0006] In view of the above-mentioned conventional drawbacks, the present invention aims to provide a soundproof partition wall that can efficiently block external sounds and absorb shaking caused by earthquakes without being damaged.

[0007] The above and other objects and novel features of the present invention will become more fully apparent from the following description taken in conjunction with the accompanying drawings. However, the drawings are for illustrative purposes only and are not intended to limit the technical scope of the present invention. [Means for solving the problem]

[0008] In order to achieve the above object, the soundproofing device for ceilings according to claim 1 of the present invention is a soundproofing device for ceilings that is installed in a joint between one frame and another frame, and is composed of: one soundproofing panel that is attached to the one frame and has a soundproofing material on a pressing portion and an underside that is continuous with the pressing portion; another soundproofing panel that is attached to the other frame and has a soundproofing material on a pressing portion and an underside that is continuous with the pressing portion; an intermediate soundproofing panel that is provided between the one soundproofing panel and the other soundproofing panel so that both ends of the intermediate soundproofing panel are approximately abutted against the one soundproofing panel and the other soundproofing panel, respectively, and has an inclined surface and a soundproofing material on an upper surface that is continuous with the inclined surface; and a support means that supports the intermediate soundproofing panel and positions it at a predetermined position. The protruding ends of the one soundproof panel and the other soundproof panel are each formed with an inclined surface-shaped pressing portion, and both left and right ends of the intermediate soundproof panel are formed with an inclined surface that is in approximate surface contact with the pressing portion, so that when the joint portion narrows due to an earthquake, the pressing portions of the one soundproof panel and the other soundproof panel press the intermediate soundproof panel, displacing the intermediate soundproof panel upward or downward, and when the shaking due to the earthquake ends, the intermediate soundproof panel returns to its normal position.

[0009] The pressing portion of the ceiling soundproofing device according to claim 2 is If the joint becomes narrower due to an earthquake, The intermediate soundproofing panel is configured to be displaced upward by pressing it, and the support means is characterized in that it comprises a link member having one end attached to one of the main bodies and the other end attached to the other main body, a support tube provided at the pivot portion of the link member, a connecting member inserted into the support tube so as to be slidable in the vertical direction and having a lower end attached to the intermediate soundproofing panel, and a stopper that limits the downward sliding of the connecting member so that the intermediate soundproofing panel is not displaced downward beyond a predetermined position.

[0010]

[0011] The soundproofing structure for a joint according to claim 3 is a soundproofing structure for a joint between one frame and another frame provided via a joint, and is composed of a pair of wall soundproofing devices provided in the joint between the wall surfaces between the one frame and the other frame, a ceiling soundproofing device provided in the joint between the ceilings and provided so as to be in approximate contact with upper ends of the pair of wall soundproofing devices, and a floor soundproofing device provided in the joint between the floor surfaces and provided so as to be in approximate contact with lower ends of the pair of wall soundproofing devices, and the ceiling soundproofing device comprises one soundproofing panel attached to the one frame and having a soundproofing member on a pressing portion and a lower surface continuous with the pressing portion, and a floor soundproofing device attached to the other frame and having a pressing portion and a lower surface continuous with the pressing portion. the other soundproof panel having a soundproofing member; an intermediate soundproof panel between the one soundproof panel and the other soundproof panel, the intermediate soundproof panel having an inclined surface and a soundproofing member on an upper surface continuous with the inclined surface, and support means for supporting the intermediate soundproof panel and positioning it at a predetermined position, wherein the one soundproof panel and the other soundproof panel have inclined surface-shaped pressing portions formed on the protruding ends of the one soundproof panel and the other soundproof panel, respectively, and the intermediate soundproof panel has inclined surfaces formed on both left and right end portions of the intermediate soundproof panel so as to be in approximate surface contact with the pressing portions, and when the shaking caused by the earthquake ends, the intermediate soundproof panel returns to its normal position.

[0012] The pressing portion of the soundproof structure for the joint portion according to claim 4 is If the joint becomes narrower due to an earthquake, The intermediate soundproofing panel is configured to be displaced upward by pressing it, and the support means is characterized in that it comprises a link member having one end attached to one of the main bodies and the other end attached to the other main body, a support tube provided at the pivot portion of the link member, a connecting member inserted into the support tube so as to be slidable in the vertical direction and having a lower end attached to the intermediate soundproofing panel, and a stopper that limits the downward sliding of the connecting member so that the intermediate soundproofing panel is not displaced downward beyond a predetermined position.

[0013] Effect of the Invention

[0014] As is clear from the above description, the present invention provides the following effects. (1) In each of the inventions described in claims 1 and 2, the joints between one soundproof panel, the other soundproof panel, and the intermediate soundproof panel can be sealed with soundproofing material, thereby efficiently blocking out sound from outside. (2) During an earthquake, the intermediate soundproofing panel displaces upward or downward, allowing it to absorb the shaking caused by the earthquake without being damaged. (3) Inclined surfaces are formed at both ends of the intermediate soundproofing panel to be in approximate surface contact with the pressing portion, and soundproofing material is provided on the pressing portion of one soundproofing panel, the pressing portion of the other soundproofing panel, and the inclined surface of the intermediate soundproofing panel, thereby achieving more reliable soundproofing. (4) In each of the inventions described in claims 3 and 4, the wall soundproofing device, the ceiling soundproofing device, and the floor soundproofing device can be used to surround the area in a roughly tunnel-like shape, so that even structures protruding from a building, such as a walkway, can be reliably soundproofed. (5) Inclined surfaces are formed at both ends of the intermediate soundproofing panel to be in approximate surface contact with the pressing portion, and soundproofing material is provided on the pressing portion of one soundproofing panel, the pressing portion of the other soundproofing panel, and the inclined surface of the intermediate soundproofing panel, thereby achieving more reliable soundproofing. [Brief description of the drawings]

[0015] 1 to 10 are explanatory views showing a first embodiment of the present invention. [Figure 1] 1 is a plan view of a ceiling soundproofing device according to a first embodiment. FIG. [Diagram 2] Cross-sectional view taken along line 2-2 in Figure 1. [Diagram 3] FIG. 4 is an explanatory diagram of one soundproof panel and the other soundproof panel. [Figure 4] An explanatory diagram of an intermediate soundproofing panel. [Diagram 5] Illustrative diagram of supporting means [Figure 6] FIG. 2 is a front view of the soundproof structure for a joint according to the first embodiment. [Figure 7] Cross-sectional view taken along line 7-7 in Figure 6. [Figure 8] Cross-sectional view taken along line 8-8 in Figure 7. [Figure 9] An explanatory diagram of operation when the joint has narrowed due to an earthquake. [Figure 10] An explanatory diagram of operation when the joint has widened due to an earthquake. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] The present invention will be described in detail below with reference to the embodiments shown in the drawings. In this specification, the left-right direction, the front (lower in the drawing) and the rear (upper in the drawing) directions are based on Fig. 1. The top (upper in the drawing) and bottom (lower in the drawing) directions are based on Fig. 2.

[0017] In addition, in the present invention, the term "structure" refers to a structure such as a building, road, slab, elevator shaft, etc. in which a joint plate can be installed, and an entrance / exit includes not only an entrance / exit with a door or gate, but also a passageway through which people, vehicles, etc. can pass.

[0018] In a first embodiment for carrying out the present invention shown in Figs. 1 to 10, reference numeral 1 denotes a ceiling soundproofing device that is installed in a joint portion 2 between one body 3 and another body 4.

[0019] As shown in Fig. 1 and Fig. 2, the ceiling soundproofing device 1 is composed of one soundproof panel 6 attached to the one frame 3 and having a soundproofing material 5 on at least one side thereof, the other soundproof panel 7 attached to the other frame 4 and having a soundproofing material 5 on at least one side thereof, an intermediate soundproof panel 8 provided between the one soundproof panel 6 and the other soundproof panel 7 so that both ends of the intermediate soundproof panel 8 are substantially abutted against the one soundproof panel 6 and the other soundproof panel 7 and having a soundproofing material 5 on at least one side thereof, and a support means 9 for supporting the intermediate soundproof panel 8 and positioning it at a predetermined position. Here, "substantially abutting" includes not only the case where the panels are in contact with each other but also the case where the panels are provided with a small gap. It is desirable to provide a reinforcing member 10 such as a rib for reinforcing strength at one end (attachment end) of the one soundproof panel 6 and the other soundproof panel 7. It is preferable that the reinforcing member 10 has a relief portion so as not to interfere with the intermediate soundproof panel 8 when the joint portion 2 narrows and the intermediate soundproof panel 8 rides up onto the upper surfaces of the one soundproof panel 6 and the other soundproof panel 7. In such a case, it is preferable to configure the lower portion of the reinforcing member 10 so as to be approximately flush with the upper surfaces of the one soundproof panel 6 and the other soundproof panel 7.

[0020] One soundproof panel 6 is composed of a panel body 6a and a soundproof member 5 provided on the entire lower surface of this panel body 6a and the entire pressing portion 11. One end of this one soundproof panel 6 is fixedly attached to the wall surface 3a of one of the frames 3, and the other end (protruding end) is formed with an inclined pressing portion 11 that presses the middle soundproof panel 8 upward.

[0021] The other soundproof panel 7 is formed in a shape that is approximately symmetrical to the one soundproof panel 6, and is composed of a panel main body 7a and a soundproof member 5 provided on the entire lower surface of this panel main body 7a and the entire pressing portion 11. The other soundproof panel 7 has one end fixedly attached to the wall surface of the other body 4 so as to face the one soundproof panel 6, and the other end (protruding end) is formed with an inclined pressing portion 11 that presses the middle soundproof panel 8 upward, similar to the one soundproof panel 6.

[0022] The intermediate soundproof panel 8 is composed of a panel body 8a and a soundproof member 5 provided on the entire lower surface of the panel body 8a and the entire inclined surface 12. The intermediate soundproof panel 8 is supported by a support means 9 provided between one body 3 and the other body 4, and is provided at a position such that both end sides of the intermediate soundproof panel 8 are always in approximate contact with one soundproof panel 6 and the other soundproof panel 7 by the support means 9.

[0023] The intermediate soundproof panel 8 has, at both ends thereof, the inclined surfaces 12 which are in approximate surface contact with the pressing portion 11 .

[0024] In this way, by providing soundproofing material 5 on the entire lower surfaces of one soundproofing panel 6 and the other soundproofing panel 7 and on the entire pressing portion 11, and by providing soundproofing material 5 on the entire lower surface of the intermediate soundproofing panel 8 and on the entire inclined surface 12, the entire joint portion 2 is blocked by the soundproofing material 5, and the joint portion 2 in the ceiling portion can be reliably soundproofed.

[0025] The soundproofing member 5 may be, for example, a sheet-like lead, but it is preferable to use a soft soundproofing sheet containing metal powder or a high-density filler. In this embodiment, the soundproofing member 5 is provided on the pressing portion 11 of one soundproofing panel 6 and one side surface (in this embodiment, the bottom surface) continuing to the pressing portion 11, the pressing portion 11 of the other soundproofing panel 7 and one side surface (in this embodiment, the bottom surface) continuing to the pressing portion 11, and the inclined surface 12 of the intermediate soundproofing panel 8 and one side surface (in this embodiment, the bottom surface) continuing to the inclined surface. However, the soundproofing member 5 may be provided on all surfaces, or the soundproofing member 5 may not be provided on the pressing portion 11 or the inclined surface 12. Even if the soundproofing member 5 is not provided on the pressing portion 11 or the inclined surface 12, by providing the soundproofing member 5 on one side surface (bottom surface) of one soundproofing panel 6, the other soundproofing panel 7, or the intermediate soundproofing panel 8, the soundproofing member 5 can cover the joint portion 2 without any gaps, thereby obtaining a soundproofing effect.

[0026] In this embodiment, the support means 9 is composed of a link member 13 having one end attached to the one of the bodies 3 and the other end attached to the other body 4, a support tube 15 provided at the pivot portion 14 of the link member 13, a connecting member 16 inserted into the support tube 15 so as to be slidable in the vertical direction and having a lower end attached to the intermediate soundproof panel 8, and a stopper 17 that limits the downward sliding of the connecting member 16 so as to prevent the intermediate soundproof panel 8 from being displaced downward beyond a predetermined position.

[0027] In this embodiment, this link member 13 is composed of a long link material 18 having one end attached to the left and right bodies 3, 4, respectively, and the other end connected above the one end and at approximately the center of the joint portion 2, and a pair of link materials 19 having one end connected to approximately the center of this long link material 18 and the other end approximately level with the left and right ends and connected at a position approximately at the center of the joint portion 2, and the support tubes 15, 15a are fixed to the pivot portion 14 of the long link material 18 and the pivot portion 14a of the link material 19.

[0028] In this embodiment, the support cylinder 15 is a substantially pipe-shaped member, into which the connection member 16 is slidably inserted.

[0029] Incidentally, the pivot portion 14a of the link member 19 is substantially horizontal with one end of the long link member 18, so that the link member 14 does not move vertically even if it expands and contracts left and right. Therefore, the support tube 15a attached to the pivot portion 14a does not move vertically.

[0030] This pivot portion 14a and one end of the long link material 18 are positioned slightly above the soundproofing panels 6, 7, and 8, that is, above enough so as not to interfere with the pivot portion 14a or the support tube 15a even if the intermediate soundproofing panel 8 is displaced upward during an earthquake.

[0031] The long link members 18 may be attached directly to the left and right frames, but in this embodiment, they are attached to the reinforcing member 10 via hinge members.

[0032] In this embodiment, the connecting member 16 is a round bar- or round pipe-shaped member that is inserted into the support tubes 15, 15a, and the intermediate soundproof panel 8 is fixed to its lower end. A flange-shaped stopper 17 is formed on this connecting member 16 so as to prevent the lower surface of the intermediate soundproof panel 8 from being displaced downward from a position substantially horizontal with the lower surfaces of the one soundproof panel 6 and the other soundproof panel 7. This stopper 17 abuts against the upper surface of the support tube 15a in a normal state, preventing the intermediate soundproof panel 8 from being displaced downward.

[0033] Although the intermediate soundproof panel 8 is structured to lower downward due to its own weight, it may be structured, for example, by providing a biasing means for biasing the intermediate soundproof panel 8 downward so that the pressing portion 11 and the inclined surface 12 come into closer contact with each other. When the intermediate soundproof panel 8 is structured so as to be displaced downward, it is preferable to provide a biasing means for constantly biasing the intermediate soundproof panel 8 upward and to provide a stopper 17 for preventing the intermediate soundproof panel 8 from being displaced upward beyond a predetermined position.

[0034] When soundproofing only the joints 2 between ceilings, it is possible to do so by using the ceiling soundproofing device 1 of the present invention. However, in order to soundproof the entire periphery of a passage-like part protruding from the left and right structural members, for example, it is advisable to use the joint soundproofing structure 20 of the present invention that utilizes the ceiling soundproofing device 1 of the present invention.

[0035] As shown in Figures 6 to 8, the joint soundproofing structure 20 of the present invention is composed of a pair of wall soundproofing devices 21 provided in the joint 2 between the wall surfaces between one structure 3 and the other structure, a ceiling soundproofing device 1 of the present invention provided in the joint 2 between the ceilings and provided so as to approximately abut the upper ends of the pair of wall soundproofing devices 20, and a floor soundproofing device 22 provided in the joint 2 between the floor surfaces and provided so as to approximately abut the lower ends of the pair of wall soundproofing devices 21, respectively.

[0036] In such a soundproofing structure 20 for a joint, a wall soundproofing device 21 is provided between an interior wall joint device 23 and an exterior wall joint device 24 provided on the wall surfaces of one body 3 and the other body 4. Any type of wall soundproofing device 21 may be used as long as it can absorb shaking caused by an earthquake and has a soundproofing effect, and any type of joint device may be used as the interior wall joint device 23 and the exterior wall joint device 24 as long as they are capable of absorbing shaking caused by an earthquake.

[0037] The ceiling soundproofing device 1 of the present invention is arranged so as to protrude outward in the front-to-rear direction beyond the front-to-rear ends of the ceiling joint device 25, and the bottoms on both end sides of the ceiling soundproofing device 1 approximately abut the upper ends of a pair of wall soundproofing devices 21, and is formed with dimensions such that the approximately abutting state is not released even if the left and right bodies 3, 4 shake due to an earthquake.

[0038] The floor soundproofing device 22 is provided in the joint portion 2 below the floor joint device 26 used in the floor portion of the connecting passage. Any type of floor soundproofing device 22 may be used as long as it can absorb shaking caused by an earthquake and has a soundproofing effect, and any type of floor joint device 26 may be used as long as it is a joint device that can absorb shaking caused by an earthquake.

[0039] Like the ceiling soundproofing device 1, this floor soundproofing device 22 is arranged to protrude outward in the front-to-rear direction beyond the front-to-rear ends of the floor joint device 26, and the upper parts of both end sides of the floor soundproofing device 22 approximately abut against the lower ends of the pair of wall soundproofing devices 21, and is sized such that the approximately abutting state is not released even if the left and right bodies 3, 4 shake due to an earthquake.

[0040] In this way, by providing a pair of wall soundproofing devices 21 and a ceiling soundproofing device 1 and a floor soundproofing device 22 that approximately abut the upper and lower ends of the pair of wall soundproofing devices 21, respectively, a soundproofing structure is created in which the soundproofing devices 1, 21, and 22 surround the connecting passage like a tunnel, thereby reliably blocking out noise from outside.

[0041] When an earthquake causes the frames 3, 4 to shake left and right and the joints 2 to narrow, as shown in Figure 9, the pressing parts 11 of the left and right soundproofing panels 6, 7 press against the inclined surfaces 12 of the middle soundproofing panel 8, causing the middle soundproofing panel 8 to slide upward and absorb the shaking caused by the earthquake. When the shaking caused by the earthquake ends, the center soundproofing panel 8 displaces downward under its own weight and returns to its normal state (the state shown in Figure 1).

[0042] In addition, the wall soundproofing device 21, floor soundproofing device 22, interior wall joint device 23, exterior wall joint device 24, ceiling joint device 25 and floor joint device 26 also follow the shaking caused by the earthquake and absorb the shaking caused by the earthquake without damaging the structure or these devices.

[0043] When the framework 3, 4 shakes left and right due to an earthquake and the joint 2 widens, the left and right soundproofing panels 6, 7 slide left and right so as to move away from each other, and the middle soundproofing panel 8 absorbs the shaking caused by the earthquake without being displaced up and down due to the stopper, as shown in Fig. 10. At this time, a gap is temporarily created between the left and right soundproofing panels 6, 7 and the middle soundproofing panel 8, but once the shaking caused by the earthquake ends, it returns to its normal state (the state shown in Fig. 1), and the soundproofing function is also restored. In addition, the wall soundproofing device 21, floor soundproofing device 22, interior wall joint device 23, exterior wall joint device 24, ceiling joint device 25, and floor joint device 26 also follow the shaking caused by the earthquake and absorb the shaking caused by the earthquake without damaging the framework or these devices.

[0044] When the framework 3, 4 sways in different forward and backward directions due to an earthquake, the one soundproofing panel 6, the middle soundproofing panel 8, and the other soundproofing panel 7 shift forward and backward to absorb the shaking caused by the earthquake (not shown). The wall soundproofing device 21, the floor soundproofing device 22, the interior wall joint device 23, the exterior wall joint device 24, the ceiling joint device 25, and the floor joint device 26 also follow the shaking caused by the earthquake, absorbing the shaking caused by the earthquake without damaging the framework or these devices. In this case, it is desirable to configure the pair of wall soundproofing devices 22 so that the upper ends of the pair are in approximate contact with the lower surface of the ceiling soundproofing device 1.

[0045] In the embodiment of the present invention, the supporting means using the link members or the like is used, but the supporting means using a rack and pinion or the like may also be used. [Industrial Applicability]

[0046] The present invention can be used in industries that manufacture and use ceiling soundproofing devices and soundproof joint structures. [Explanation of symbols]

[0047] 1: Ceiling soundproofing device, 2: Joint section, 3: One body, 4: The other body, 5: soundproofing member; 6: one soundproofing panel; 7: the other soundproof panel; 8: the intermediate soundproof panel; 9: supporting means; 10: reinforcing member; 11: pressing portion; 12: inclined surface; 13: link member; 14: pivot portion; 15: supporting tube; 16: connecting member; 17: stopper, 18: long link material, 19: Link material, 20: Soundproofing structure of joints, 21: Wall soundproofing device; 22: Floor soundproofing device; 23: Joint device for internal walls, 24: Joint device for external walls, 25: Ceiling joint device, 26: Floor joint device.

Claims

1. A ceiling soundproofing device that is installed in a joint between a ceiling of one frame and a ceiling of another frame, a first soundproof panel attached to the first frame and having a soundproofing material on at least one side thereof; a second soundproof panel attached to the second frame and having a soundproofing material on at least one side thereof; an intermediate soundproof panel provided between the first soundproof panel and the second soundproof panel such that both ends of the intermediate soundproof panel are in contact with the first soundproof panel and the second soundproof panel, the intermediate soundproof panel having a soundproofing material on at least one side thereof; and a support means for supporting the intermediate soundproof panel and positioning it at a predetermined position; A sloping pressure portion is formed on the protruding end portions of the one soundproofing panel and the other soundproofing panel, and when the joint portion becomes narrower due to an earthquake, the pressure portions of the one soundproofing panel and the other soundproofing panel press against the middle soundproofing panel, displacing the middle soundproofing panel upward or downward, and when the shaking due to the earthquake ends, the middle soundproofing panel returns to its normal position in this soundproofing device for a ceiling.

2. The pressing portion is formed to press the intermediate soundproof panel to displace the intermediate soundproof panel upward, The soundproofing device for a ceiling as described in claim 1, characterized in that the support means is composed of a link member having one end attached to the one of the main bodies and the other end attached to the other of the main bodies, a support tube provided at the pivot portion of the link member, a connecting member inserted into the support tube so as to be slidable in the vertical direction and having a lower end attached to the intermediate soundproofing panel, and a stopper that limits the downward sliding of the connecting member so that the intermediate soundproofing panel is not displaced downward beyond a predetermined position.

3. The soundproofing device for a ceiling as described in claim 1 or 2, characterized in that an inclined surface is formed at both ends of the intermediate soundproofing panel to be in approximate surface contact with the pressing portion, and the soundproofing member is also provided on the pressing portion of the one soundproofing panel, the pressing portion of the other soundproofing panel, and the inclined surface of the intermediate soundproofing panel.

4. A soundproofing structure for a joint provided in a joint between one body and another body provided through a joint, The soundproofing system is composed of a pair of wall soundproofing devices provided in the joints between the wall surfaces between the one frame and the other frame, a ceiling soundproofing device provided in the joints between the ceilings and provided so as to be in approximate contact with upper ends of the pair of wall soundproofing devices, and a floor soundproofing device provided in the joints between the floor surfaces and provided so as to be in approximate contact with lower ends of the pair of wall soundproofing devices, The ceiling soundproofing device is comprised of: one soundproof panel attached to the one frame and having a soundproofing material on at least one side thereof; another soundproof panel attached to the other frame and having a soundproofing material on at least one side thereof; an intermediate soundproof panel provided between the one soundproof panel and the other soundproof panel and having a soundproofing material on at least one side thereof; and a support means for supporting the intermediate soundproof panel and positioning it at a predetermined position; A sloping pressure portion is formed on the protruding end portions of the one soundproof panel and the other soundproof panel, and when the joint portion becomes narrower due to an earthquake, the pressure portions of the one soundproof panel and the other soundproof panel press against the intermediate soundproof panel, displacing the intermediate soundproof panel upward or downward, and when the shaking caused by the earthquake ends, the intermediate soundproof panel returns to its normal position in this soundproof structure for the joint portion.

5. The pressing portion is formed to press the intermediate soundproof panel to displace the intermediate soundproof panel upward, The soundproofing structure of the joint portion described in claim 4, characterized in that the support means is composed of a link member having one end attached to the one of the structures and the other end attached to the other of the structures, a support tube provided at the pivot portion of the link member, a connecting member inserted into the support tube so as to be slidable in the vertical direction and having a lower end attached to the intermediate soundproofing panel, and a stopper that limits the downward sliding of the connecting member so that the intermediate soundproofing panel does not displace downward beyond a predetermined position.

6. 6. A soundproofing structure for a joint portion as described in claim 4 or claim 5, characterized in that an inclined surface is formed at both ends of the intermediate soundproofing panel to be in approximate surface contact with the pressing portion, and the soundproofing member is also provided on the pressing portion of the one soundproofing panel, the pressing portion of the other soundproofing panel, and the inclined surface of the intermediate soundproofing panel.

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