Floor 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 floor soundproof device 1 provided to a joint section 2 between floors, comprises: one soundproof panel 6 that has a soundproof member 5 on one side face; the other soundproof panel 7 that has a soundproof member 5 on one side face; an intermediate soundproof panel 8 that sits between the two soundproof panels 6, 7; and support means 9. The support means 9 consists of a pair of laterally extendable support arms 12, a middle-holding mechanism 13, and a connection member 14 that gets the intermediate soundproof panel 8 connected to the top end of it. The soundproof panels 6, 7 have pressing parts formed at the ends of their protruding parts. The pressing parts 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 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 floor soundproofing device provided 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 floor soundproofing device and a soundproofing structure for joints that can efficiently soundproof external sounds and absorb shaking caused by earthquakes without breaking.

[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 floor soundproofing device according to claim 1 of the present invention is a floor soundproofing device provided in a joint between floor surfaces of one frame and another frame, the floor soundproofing device being attached to the one frame, The pressing portion and the upper surface connected to the pressing portion are provided with a soundproofing material. Attached to one soundproof panel and the other body, The pressing portion and the upper surface connected to the pressing portion are provided with a soundproofing material. The other soundproof panel and the one soundproof panel and the other soundproof panel are connected to each other at both left and right ends. One soundproof panel and the above The other soundproof panel and The inclined surface and the upper surface continuing to the inclined surface are provided with soundproofing materials. The soundproofing panel is made up of an intermediate soundproofing panel, and a support means for supporting the intermediate soundproofing panel and positioning it at a predetermined position. The support means is made up of a pair of support arms that expand and contract in the left-right direction, a centering mechanism that connects the pair of support arms and whose center is always located at the approximate center of the joint, and a connecting member that is provided at the approximate center of the centering mechanism so as to be slidable in the up-down direction and whose upper end is connected to the intermediate soundproofing panel. The protruding ends of the one soundproofing panel and the other soundproofing panel are provided with an inclined surface-like protruding portion. The pressing portion are formed respectively. At the same time, the inclined surfaces are formed at both left and right end portions of the intermediate soundproof panel so as to be in a state of approximate surface contact with the pressing portion,When the joint becomes narrower due to an earthquake, the pressing portions of the one soundproofing panel and the other soundproofing panel press against the intermediate soundproofing panel, displacing the intermediate soundproofing panel upward or downward, and when the shaking caused by the earthquake ends, the intermediate soundproofing panel returns to its normal position.

[0009] The pressing portion of the floor soundproofing device according to claim 2 is If the joints become narrower due to an earthquake, The intermediate soundproof panel is configured to be displaced downward by pressing the intermediate soundproof panel, and the support means is provided on the center maintaining mechanism, When the shaking caused by the earthquake has ended, The soundproofing device further includes a biasing tool for biasing the intermediate soundproofing panel upward.

[0010] The floor soundproofing device described in claim 3 is characterized in that both ends of the intermediate soundproofing panel are formed with inclined surfaces that are in approximate surface contact with the pressing portion, and the soundproofing member is also provided on the pressing portion of one of the soundproofing panels, the pressing portion of the other soundproofing panel, and the inclined surface of the intermediate soundproofing panel.

[0011] The soundproofing structure for a joint of the present invention described in claim 4 is a soundproofing structure for a joint between one skeleton and another skeleton 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 skeleton and the other skeleton, a ceiling soundproofing device provided in the joint between the ceiling 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, the floor soundproofing device being a floor soundproofing device provided in the joint between the floor surfaces of the one skeleton and the other skeleton, and being attached to the one skeleton, The pressing portion and the upper surface connected to the pressing portion are provided with a soundproofing material. Attached to one soundproof panel and the other body, The pressing portion and the upper surface connected to the pressing portion are provided with a soundproofing material. The other soundproof panel and the one soundproof panel and the other soundproof panel are connected to each other at both left and right ends. One soundproof panel and the above The other soundproof panel and The inclined surface and the upper surface continuing to the inclined surface are provided with soundproofing materials.The soundproofing panel is made up of an intermediate soundproofing panel, and a support means for supporting the intermediate soundproofing panel and positioning it at a predetermined position. The support means is made up of a pair of support arms that expand and contract in the left-right direction, a centering mechanism that connects the pair of support arms and whose center is always located at the approximate center of the joint, and a connecting member that is provided at the approximate center of the centering mechanism so as to be slidable in the up-down direction and whose upper end is connected to the intermediate soundproofing panel. The protruding ends of the one soundproofing panel and the other soundproofing panel are provided with an inclined surface-like protruding portion. The pressing portion are formed respectively. At the same time, the inclined surfaces are formed at both left and right end portions of the intermediate soundproof panel so as to be in a state of approximate surface contact with the pressing portion, When the joint becomes narrower due to an earthquake, the pressing portions of the one soundproofing panel and the other soundproofing panel press against the intermediate soundproofing panel, displacing the intermediate soundproofing panel upward or downward, and when the shaking caused by the earthquake ends, the intermediate soundproofing panel returns to its normal position.

[0012] The pressing portion of the soundproof structure for the joint portion according to claim 5 is If the joints become narrower due to an earthquake, The intermediate soundproofing panel is configured to be displaced downward by pressing the intermediate soundproofing panel, The support means is provided on the center maintaining mechanism, When the shaking caused by the earthquake has ended, The soundproofing device further includes a biasing tool for biasing the intermediate soundproofing panel upward.

[0013] The soundproofing structure of the joint portion described in claim 6 is characterized in that inclined surfaces are 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. 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) The invention described in claim 3 can also obtain the same effects as those described in (1) and (2) above, and in addition, inclined surfaces are formed at both ends of the intermediate soundproof panel to be in approximate surface contact with the pressing portion, and soundproofing material is also provided on the pressing portion of one soundproof panel, the pressing portion of the other soundproof panel, and the inclined surface of the intermediate soundproof panel, thereby achieving more reliable soundproofing. (4) In the inventions described in claims 4 and 5, 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) The invention described in claim 6 can obtain the same effect as (4) above, and at the same time, inclined surfaces are formed at both ends of the intermediate soundproof panel to be in approximate surface contact with the pressing portion, and soundproofing material is also provided on the pressing portion of one soundproof panel, the pressing portion of the other soundproof panel, and the inclined surface of the intermediate soundproof 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 and right directions, rear (upper in the drawing), and front (lower in the drawing) directions are based on Fig. 1. The lower (lower in the drawing) and upper (upper 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 the term "entrance / exit" refers not only to an entrance / exit with a door or gate, but also to 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 floor soundproofing device that is installed in a joint portion 2 between one body 3 and another body 4.

[0019] 1 and 2, the floor soundproofing device 1 is composed of one soundproofing panel 6 attached to the one frame 3 and having a soundproofing material 5 on at least one side thereof, the other soundproofing panel 7 attached to the other frame 4 and having a soundproofing material 5 on at least one side thereof, an intermediate soundproofing panel 8 provided with a soundproofing material 5 on at least one side thereof and disposed between the one soundproofing panel 6 and the other soundproofing panel 7 so that the left and right ends of the intermediate soundproofing panel 8 are substantially in contact with the one soundproofing panel 6 and the other soundproofing panel 7, respectively, and a support means 9 for supporting the intermediate soundproofing panel 8 and positioning it at a predetermined position. Here, "substantially in contact" includes not only the case where the panels are in contact with each other, but also the case where the panels are disposed with a slight gap therebetween.

[0020] 2, one soundproof panel 6 is a long plate-like cover or shielding member made up of a panel body 6a and a soundproofing member 5 provided on the entire upper surface of this panel body 6a and the entire pressing portion 10. One end of this one soundproof panel 6 on the left side is fixedly attached to the wall surface 3a of one of the frames 3, and the other end (protruding end) on the right side is formed with an inclined pressing portion 10 that presses the intermediate soundproof panel 8 downward.

[0021] The other soundproof panel 7 is formed in a shape that is approximately symmetrical to the one soundproof panel 6, and is a long plate-like cover or shielding member made up of a panel main body 7a and a soundproof member 5 provided on the entire upper surface of this panel main body 7a and the entire pressing portion 10. The other soundproof panel 7 has one end on the right side 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) on the left side has an inclined surface-like pressing portion 10 that presses the intermediate soundproof panel 8 downward, like the one soundproof panel 6.

[0022] Furthermore, the intermediate soundproof panel 8 is a long plate-shaped cover or shielding member, similar to the above-mentioned one soundproof panel 6 and the other soundproof panel 7. In the embodiment, the upper surfaces of these shielding members 6, 7, and 8 are generally flush with each other under normal circumstances.

[0023] Thus, like the one soundproof panel 6 and the other soundproof panel 7, the intermediate soundproof panel 8 is composed of a panel body 8a and a soundproof member 5 provided on the entire upper surface of the panel body 8a and the entire inclined surface 11. The intermediate soundproof panel 8 is supported by support means 9 provided between the one frame 3 and the other frame 4, and is provided at a position such that both end sides of the intermediate soundproof panel 8 are always in approximate contact with the one soundproof panel 6 and the other soundproof panel 7.

[0024] The intermediate soundproof panel 8 has inclined surfaces 11, 11 formed at both left and right end portions thereof so as to come into approximate surface contact with the pressing portions 10, 10 at the other protruding end portions of the soundproof panels 6, 7 positioned to the left and right, respectively.

[0025] Therefore, by providing a soundproofing material 5 on the entire upper surfaces of one soundproofing panel 6 and the other soundproofing panel 7 and on the entire pressing portion 10, and by providing a soundproofing material 5 on the entire upper surface of the intermediate soundproofing panel 8 and on the entire inclined surface 11, 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.

[0026] 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 10 of the one soundproofing panel 6 and one side surface (upper surface in this embodiment) continuing to the pressing portion 10 of the other soundproofing panel 7, and the inclined surface 11 of the intermediate soundproofing panel and one side surface (upper surface in this embodiment) continuing to the pressing portion 10 of the other soundproofing panel 7, but the soundproofing member 5 may be provided on all surfaces, or the soundproofing member 5 may not be provided on the pressing portion 10 or the inclined surface 11. Even if the soundproofing member 5 is not provided on the pressing portion 10 or the inclined surface 11, the soundproofing member 5 can cover the joint portion 2 without any gaps by providing the soundproofing member 5 on one side surface (upper surface) of the one soundproofing panel 6, the other soundproofing panel 7, and the intermediate soundproofing panel 8, thereby obtaining a soundproofing effect.

[0027] In this embodiment, the support means 9 is composed of a pair of support arms 12 that expand and contract in the left-right direction, a center maintaining mechanism 13 that connects the pair of support arms 12 and has a center portion always located approximately in the center of the joint portion, a connection member 14 that is provided approximately in the center of the center maintaining mechanism 13 so as to be slidable in the up-down direction and has an upper end portion to which the intermediate soundproof panel is connected, and a biasing device 15 that is provided on the center maintaining mechanism 13 and biases the intermediate soundproof panel 8 so as to push it upward. In this embodiment, the intermediate soundproof panel 8 is configured to be displaced downward, so the biasing device 15 is necessary, but if the intermediate soundproof panel 8 is configured to be displaced upward, the biasing device 15 does not necessarily have to be used.

[0028] The support arm 12 is composed of a pipe-shaped support arm body 16 having one end attached to one or the other frame, and an insertion support arm body 17 having one end attached to the other frame and having a tip inserted into an opening on the other end side of the support arm body 16. The pair of support arms 12 are composed by attaching the support arms 12 to the left and right frames 3, 4 so as to face each other.

[0029] That is, a pair of support arms is formed by one support arm 12 having a support arm main body 16 attached at one end to one of the frames, and the other support arm 12 which is provided in the vicinity of the first support arm 12 and has a support arm main body 16 attached at one end to the other frame.

[0030] In this embodiment, the center maintaining mechanism 13 is a rack and pinion mechanism having one end attached to one support arm body 16 and the other end attached to the other support arm body 16, and a mounting part 13a is formed in the center to mount the connecting member 14 so that it can slide up and down. The mounting part 13a is also provided with a biasing tool 15 that biases the intermediate soundproof panel 8 upward. A pantograph-type link mechanism may be used as the center maintaining mechanism 13. In such a case, a pivot part located approximately in the center of the link mechanism can be used as the mounting part.

[0031] In this embodiment, this biasing device 15 uses a coil spring, as shown in Figure 2, and is formed so that when the intermediate soundproofing panel 8 is fixed, the upper surface of the intermediate soundproofing panel 8 is approximately flush with the upper surfaces of the one and the other soundproofing panels 6, 7. However, the biasing device may be configured, for example, by providing a stopper or the like so that the upper surface of the intermediate soundproofing panel 8 is approximately flush with the upper surfaces of the one and the other soundproofing panels 6, 7.

[0032] When soundproofing only the joints 2 between floor surfaces, it is possible to achieve this by using the floor 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 18 of the present invention that utilizes the floor soundproofing device 1 of the present invention.

[0033] As shown in Figures 6 to 8, the joint soundproofing structure 18 of the present invention is composed of a pair of wall soundproofing devices 19 installed in the joint 2 between the wall surfaces between one structure 3 and the other structure, a ceiling soundproofing device 20 installed in the joint 2 between the ceilings and installed so as to approximately abut the upper ends of the pair of wall soundproofing devices 19, and a floor soundproofing device 1 of the present invention installed in the joint 2 between floor surfaces and installed so as to approximately abut the lower ends of the pair of wall soundproofing devices 19, respectively.

[0034] In such a joint soundproofing structure 18, the wall soundproofing device 19 is provided between an interior wall joint device 21 and an exterior wall joint device 22 provided in the joint 2 between the wall surfaces of one body 3 and the other body 4. Any type of wall soundproofing device 19 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 21 and the exterior wall joint device 22 as long as they are capable of absorbing shaking caused by an earthquake.

[0035] The ceiling soundproofing device 20 is installed in the joint portion 2 above the ceiling joint device 23 used in the ceiling portion of the connecting passage. Any type of ceiling soundproofing device 20 may be used as long as it can absorb shaking caused by an earthquake and has a soundproofing effect, and any type of ceiling joint device 23 may be used as long as it is a joint device that can absorb shaking caused by an earthquake.

[0036] This ceiling soundproofing device 20 is arranged to protrude outward in the front-to-rear direction beyond the front-to-rear ends of the ceiling joint device 23, and the bottoms on both end sides of the ceiling soundproofing device 20 approximately abut the upper ends of the pair of wall soundproofing devices 19, and are formed with dimensions such that the approximately abutting state will not be released even if the left and right bodies 3, 4 shake due to an earthquake.

[0037] The floor soundproofing device 1 of the present invention is provided in the joint portion 2 below the floor joint device 24 used in the floor portion of the connecting passage. Any type of joint device that can absorb shaking caused by an earthquake may be used as the floor joint device 24.

[0038] Like the ceiling soundproofing device 20, the floor soundproofing device 1 is also arranged to protrude outward in the front-to-rear direction beyond the front-to-rear ends of the floor joint device 24, and the upper parts of both end sides of the floor soundproofing device 1 approximately abut against the lower ends of the 20 pairs of wall soundproofing devices 19, and are sized such that the approximately abutting state is not released even if the left and right bodies 3, 4 shake due to an earthquake.

[0039] In this way, by providing a pair of wall soundproofing devices 19, a ceiling soundproofing device 20 that approximately abuts the upper and lower ends of the pair of wall soundproofing devices 19, and a floor soundproofing device 1, the soundproofing devices 1, 19, and 20 create a soundproofing structure that surrounds the connecting passage like a tunnel, thereby reliably blocking out noise from outside.

[0040] When an earthquake causes the frames 3, 4 to shake left and right and the joints 2 to narrow, the pressing parts 10 of the left and right soundproofing panels 6, 7 press against the inclined surfaces 11 of the middle soundproofing panel 8, causing the middle soundproofing panel 8 to slide downward and absorb the shaking caused by the earthquake, as shown in Figure 9. When the shaking caused by the earthquake ends, the middle soundproofing panel 8 is displaced upward by the biasing force of the biasing device 15 and returns to its normal state (the state shown in Figure 1).

[0041] In addition, the wall soundproofing device 19, ceiling soundproofing device 20, interior wall joint device 21, exterior wall joint device 22, ceiling joint device 23 and floor joint device 24 also follow the shaking caused by the earthquake and absorb the shaking caused by the earthquake without damaging the structure or these devices.

[0042] When an earthquake causes the frames 3, 4 to shake left and right and the joint 2 to widen, the left and right soundproofing panels 6, 7 slide left and right away from each other, and the middle soundproofing panel 8 absorbs the shaking caused by the earthquake without being displaced up and down, as shown in Figure 10. At this time, a temporary gap appears 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 will return to its normal state (the state in Figure 1), and the soundproofing function will also be restored.

[0043] In addition, the wall soundproofing device 19, ceiling soundproofing device 20, interior wall joint device 21, exterior wall joint device 22, ceiling joint device 23 and floor joint device 24 also follow the shaking caused by the earthquake and absorb the shaking caused by the earthquake without damaging the structure or these devices.

[0044] When an earthquake causes the frames 3 and 4 to shake in different forward and backward directions, the soundproofing panels 6, 8 and 7 become misaligned in the forward and backward directions, absorbing the shaking caused by the earthquake (not shown).

[0045] In addition, the wall soundproofing device 19, ceiling soundproofing device 20, interior wall joint device 21, exterior wall joint device 22, ceiling joint device 23, and floor joint device 24 also follow the shaking caused by the earthquake and absorb the shaking caused by the earthquake without damaging the structure or these devices. In this case, it is desirable to configure the pair of wall soundproofing devices 19 so that their lower ends are in approximate contact with the upper surface of the floor soundproofing device 1.

[0046] In the embodiment of the present invention, a centering mechanism using a rack and pinion is used, but a centering mechanism using a pantograph-type link mechanism or the like can also be used. [Industrial Applicability]

[0047] The present invention can be used in industries that manufacture and use floor soundproofing devices and soundproof joint structures. [Explanation of symbols]

[0048] 1: Floor soundproofing device; 2: Joint portion; 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: pressing portion; 11: inclined surface; 12: support arm; 13: center maintaining mechanism; 14: connecting member; 15: biasing tool; 16: support arm body; 17: Insertion support arm body; 18: Soundproofing structure of joint; 19: Soundproofing device for walls, 20: Soundproofing device for ceilings, 21: Joint device for internal walls, 22: Joint device for external walls, 23: Ceiling joint device, 24: Floor joint device.

Claims

1. A floor soundproofing device that is installed in a joint between floor surfaces of one body and another body, the first soundproof panel being attached to the first frame and having a soundproofing material on at least one side thereof; the second soundproof panel being attached to the second frame and having a soundproofing material on at least one side thereof; an intermediate soundproof panel being provided between the first soundproof panel and the second soundproof panel so that both left and right ends of the intermediate soundproof panel are in approximate contact with the first soundproof panel 6 and the second soundproof panel 7, respectively, 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; The support means is composed of a pair of support arms that expand and contract in the left-right direction, a center retention mechanism that connects the pair of support arms and has a center portion always located approximately in the center of the joint portion, and a connection member that is provided approximately in the center of the center retention mechanism so as to be slidable in the up-down direction and has an upper end to which the intermediate soundproofing panel is connected; An inclined surface-shaped pressing portion is formed on the protruding end portion of the one soundproofing panel and the other soundproofing panel, and when the joint portion becomes narrower due to an earthquake, the pressing portions of the one soundproofing panel and the other soundproofing panel press the intermediate soundproofing panel, displacing the intermediate soundproofing panel upward or downward, and when the shaking due to the earthquake ends, the intermediate soundproofing panel returns to its normal position. This soundproofing device for floor surfaces.

2. The pressing portion is formed to press the intermediate soundproof panel to displace the intermediate soundproof panel downward, 2. The floor soundproofing device according to claim 1, wherein the support means further comprises a biasing member provided on the center maintaining mechanism for biasing the intermediate soundproofing panel so as to push it upward.

3. The soundproofing device for floor surfaces described in either claim 1 or claim 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 floor soundproofing device is a floor soundproofing device provided in a joint between floor surfaces of one frame and another frame, the first soundproof panel being attached to the first frame and having a soundproofing material on at least one side thereof; the second soundproof panel being attached to the second frame and having a soundproofing material on at least one side thereof; an intermediate soundproof panel being provided between the first soundproof panel and the second soundproof panel so that both left and right ends of the intermediate soundproof panel are in approximate contact with the first soundproof panel 6 and the second soundproof panel 7, respectively, 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; The support means is composed of a pair of support arms that expand and contract in the left-right direction, a center retention mechanism that connects the pair of support arms and has a center portion always located approximately in the center of the joint portion, and a connection member that is provided approximately in the center of the center retention mechanism so as to be slidable in the up-down direction and has an upper end to which the intermediate soundproofing panel is connected; An inclined surface-shaped pressing portion is formed on the protruding end portion of the one soundproof panel and the other soundproof panel, and when the joint portion becomes narrower 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 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 downward, 5. The soundproof structure for a joint portion according to claim 4, wherein the support means further comprises a biasing tool provided on the center maintaining mechanism for biasing the intermediate soundproof panel upward.

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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