JP7121492B2 - Vibration damping sheet and its installation method - Google Patents

Description

TECHNICAL FIELD The present invention relates to a vibration damping sheet and a method for installing the same.

The damping target of the damping sheet is a vibrating body such as a floor, a wall, or a housing of a mechanical device. The damping sheet is installed on the vibrating body in order to suppress problems such as noise caused by the vibration of the vibrating body.

The damping sheet is adhered to the object to be damped using, for example, an adhesive. Also, the damping sheet is fixed to the object to be damped by welding, for example.

JP 2017-129162 A JP-A-8-229687 Utility Model Application Publication No. 59-160224

Vibration damping sheets are installed, for example, on floors and walls in ships. In ships, the floors and walls are generally made of thick steel plates (having a thickness of 8 mm or more), and noise mainly in the low frequency range (around 400 to 1000 Hz) is generated due to vibration. However, since the conventional vibration damping sheet is thin, it may not have a sufficient vibration damping effect (loss coefficient) for suppressing noise in the low frequency range. In addition, the vibration damping sheet may not be sufficiently fixed to the floor or wall, and the vibration damping sheet may come off.

In particular, in ships, the surface of the steel plate used for walls and the like often has large unevenness, and the vibration damping sheet does not adhere sufficiently to the walls and the like, and the vibration damping sheet tends to come off. Furthermore, if the thickness of the damping sheet is increased in order to improve the damping effect, the possibility of detachment increases. A similar problem may occur even when the object to be damped is something other than a ship.

Therefore, the problem to be solved by the present invention is to provide a vibration damping sheet that improves the vibration damping effect and can suppress the occurrence of detachment, and a method for installing the same.

A damping sheet of the present invention comprises a restraining plate, a damping material provided on the restraining plate, and an adhesive layer provided on the surface of the damping material opposite to the surface of the restraining plate, wherein the restraining plate is a damping material. It is installed so as to face the object to be damped via the material and the adhesive layer. The constraining plate has a central portion and corner portions located at the corners of the central portion. The corner portion includes an inclined portion that is inclined with respect to the central portion so that the outer end portion is located on the side of the object to be damped. A gap is interposed between the inclined portion and the damping material, and a portion of the end portion of the inclined portion located on the side of the object to be damped and a surface of the damping material located on the side of the object to be damped. A gap is interposed between the extended surface and the plurality of damping sheets are adhered to the damping target by the adhesive layer in a matrix , and the plurality of damping sheets are one The end of the inclined portion provided on the vibration damping sheet and the end of the inclined portion provided on the other vibration damping sheet adjacent to one of the plurality of vibration damping sheets are common to each other It is joined to the damping object by fillet welding through the weld metal .

ADVANTAGE OF THE INVENTION According to this invention, the vibration damping sheet which can suppress the generation|occurrence|production of detachment which improves the damping effect, and its installation method can be provided.

FIG. 1 is a diagram schematically showing a damping sheet 1 according to the first embodiment. FIG. 2 is a diagram schematically showing the damping sheet 1 according to the first embodiment. FIG. 3 is a diagram schematically showing a method of installing the damping sheet 1 according to the first embodiment. FIG. 4 is a diagram schematically showing a method of installing the damping sheet 1 according to the modification of the first embodiment. FIG. 5 is a diagram schematically showing a method of installing the damping sheet 1 according to the modification of the first embodiment. FIG. 6 is a diagram schematically showing the damping sheet 1 according to the second embodiment. FIG. 7 is a diagram schematically showing the damping sheet 1 according to the second embodiment. FIG. 8 is a diagram schematically showing the damping sheet 1 according to the third embodiment. FIG. 9 is a diagram schematically showing the damping sheet 1 according to the third embodiment. FIG. 10 is a diagram schematically showing a method of installing the damping sheet 1 according to the third embodiment.

Embodiments of the invention will be described below with reference to the drawings. In addition, the invention is not limited to the contents of the drawings. Moreover, the drawings are only schematic representations, and the dimensional ratios of the respective parts do not necessarily match the actual ones. In addition, the same reference numerals are given to the same components, and overlapping descriptions are omitted as appropriate.

<First Embodiment>
[A] Configuration FIGS. 1 and 2 are diagrams schematically showing a damping sheet 1 according to a first embodiment. FIG. 1 shows the upper surface of the vibration damping sheet 1. As shown in FIG. FIG. 2 shows a cross section of the vibration damping sheet 1 taken along line A1-A1 in FIG. FIG. 2 also shows how the damping sheet 1 is installed on the damping object 80 .

In this embodiment, the damping sheet 1 includes a restraining plate 10 and a damping material 20, as shown in FIGS. installed facing the The vibration damping object 80 of the vibration damping sheet 1 is, for example, a steel plate that constitutes the floor or wall of a ship, and the vibration damping sheet 1 damps vibrations transmitted to the vibration damping object 80 and suppresses solid-borne noise. is configured to

The details of each part constituting the damping sheet 1 will be described in order.

[A-1] Restraint plate 10
In the damping sheet 1, the restraint plate 10 is a metal plate formed using a metal material such as steel or aluminum, for example. The restraining plate 10 may be a resin plate made of polyvinyl chloride, acrylic resin, acrylonitrile-butadiene-styrene copolymer synthetic resin (ABS resin), polycarbonate, polypropylene, or the like, in addition to the metal plate. The constraining plate 10 is formed using a material appropriately selected according to the material of the object 80 to be damped.

The constraining plate 10 has a central portion 11 and corner portions 12 . The center portion 11 is a portion located in the center of the restraint plate 10 . On the other hand, the corner portion 12 is a portion located at the corner of the constraining plate 10 and includes an inclined portion 121 .

Inclined portion 121 is formed, for example, by bending all four corner portions 12 of a rectangular (here, square) plate-like body. For example, the inclined portion 121 is formed by folding a rectangular plate-like body with a line that intersects a diagonal line at right angles as a crease.

The inclined portion 121 is inclined with respect to the central portion 11 so that the end located on the outside is located on the vibration damping target 80 side. In addition, the portion of the outer end portion of the inclined portion 121 that is located on the vibration damping target 80 side is closer to the central portion 11 than the surface of the damping material 20 that is located on the vibration damping target 80 side. To position. That is, between the portion 121A located on the vibration damping target 80 side of the end portion located on the outer side of the inclined portion 121 and the surface of the vibration damping material 20 that is an extension of the surface located on the vibration damping target 80 side. A gap L is interposed in . In other words, the thickness T of the damping material 20 is thicker than the depth D of the inclined portion 121 in the facing direction.

[A-2] Damping material 20
In the vibration damping sheet 1, the vibration damping material 20 is made of, for example, a mixture of synthetic rubber and other materials at a predetermined ratio.

The damping material 20 is provided on the restraining plate 10 . Here, the damping material 20 is provided on one surface of the restraining plate 10 that is positioned on the vibration damping target 80 side when the damping sheet 1 is placed on the vibration damping target 80 . The damping material 20 is adhered to the restraint plate 10, for example.

In this embodiment, the damping material 20 is not provided in the central portion 11 near the corner portions 12 . Moreover, the damping material 20 is not provided at the corner portion 12 . Therefore, in this embodiment, a gap G is interposed between the inclined portion 121 of the corner portion 12 and the damping material 20 .

[A-3] Adhesive layer 30
In addition to the above, the damping sheet 1 of this embodiment includes an adhesive layer 30 . The adhesive layer 30 is provided on one surface of the damping material 20 located on the damping target 80 side.

[A-4] Others In the damping sheet 1 of the present embodiment, the thickness of the damping material 20 and the thickness of the restraining plate 10 are arbitrary according to the frequency of vibration to be suppressed, etc. However, the damping material 20 is preferably thicker than the thickness of the constraining plate 10 . As a result, the damping material 20 can be evenly attached to the damping target 80, so that the damping effect is improved and the occurrence of detachment can be suppressed. For example, the thickness of the damping material 20 ranges from 1.0 mm to 6.0 mm, while the thickness of the restraining plate 10 ranges from 0.6 mm to 3.2 mm.

[B] Installation Method An installation method for installing the vibration damping sheet 1 on the vibration damping object 80 will be described. Here, the installation method of the damping sheet 1 will be described using FIG. 3 together with FIG. 2 .

FIG. 3 is a diagram schematically showing a method of installing the damping sheet 1 according to the first embodiment. Similar to FIG. 2, FIG. 3 shows a cross section of the vibration damping sheet 1 taken along line A1-A1 of FIG.

When installing the vibration damping sheet 1 on the vibration damping object 80, first, as shown in FIG. 2, the vibration damping sheet 1 is prepared.

Here, the damping sheet 1 is prepared so that the restraining plate 10 faces the damping object 80 via the damping material 20 . Then, the vibration damping sheet 1 is brought closer to the vibration damping object 80 . As a result, the damping sheet 1 is adhered to the damping object 80 by the adhesive layer 30 .

Next, as shown in FIG. 3, the inclined portion 121 is joined to the vibration damping object 80 .

Here, the inclined portion 121 is joined to the damping target 80 by welding. Specifically, the welding is fillet welding, and the inclined portion 121 is joined to the damping target 80 via the weld metal 50 formed by fillet welding.

[C] Summary As described above, in the vibration damping sheet 1 of the present embodiment, the corner portions 12 of the restraining plate 10 are arranged with respect to the center portion 11 so that the outer ends are positioned on the vibration damping target 80 side. It includes an inclined ramp 121 . The damping sheet 1 of the present embodiment is adhered to the damping target 80 by the adhesive layer 30, and the inclined portion 121 is joined to the damping target 80 by welding. Therefore, this embodiment can effectively prevent the vibration damping sheet from coming off. As a result, the damping effect can be fully exhibited.

As described above, the vibration damping sheet 1 of this embodiment has the gap G between the inclined portion 121 and the vibration damping material 20 . Therefore, the heat used when welding the inclined portion 121 to the damping object 80 is blocked by the gap G and is less likely to be transmitted to the damping material 20 . As a result, in the present embodiment, decomposition of the damping material 20 due to the heat of welding is suppressed, so that it is possible to suppress the generation of an offensive odor due to the decomposition gas, the adverse effect of the decomposition gas on welding, and the like. .

In the present embodiment, the portion of the end portion of the inclined portion 121 that is located on the vibration damping target 80 side is closer to the central portion than the surface of the damping material 20 that is located on the vibration damping target 80 side, as described above. Located on the 11th side. Therefore, when the inclined portion 121 is welded to the vibration damping target 80, the vibration damping material 20 does not intervene between the vibration damping material 20 and the vibration damping target 80. It will be in close contact with 80. As a result, in this embodiment, it is possible to improve the damping effect.

[D] Modification Figs. 4 and 5 are diagrams schematically showing a method of installing the damping sheet 1 according to a modification of the first embodiment. FIG. 4 shows the upper surface of the damping sheet 1. As shown in FIG. FIG. 5 shows a cross section of the A2-A2 portion of FIG.

As shown in FIGS. 4 and 5, a plurality of (four in this case) damping sheets 1 may be arranged in a matrix and placed on the damping object 80 . In this case, the inclined portion 121 provided on one damping sheet 1 and the inclined portion 121 provided on the other damping sheet 1 adjacent to the one damping sheet 1 are welded by fillet welding. 80 may be joined at the same time. That is, the inclined portion 121 provided on one damping sheet 1 and the inclined portion 121 provided on the other damping sheet 1 are joined to the damping target 80 via the common weld metal 50. good too. Thereby, installation work of a plurality of damping sheets 1 can be performed efficiently.

<Second embodiment>
[A] Configuration FIGS. 6 and 7 are diagrams schematically showing a damping sheet 1 according to a second embodiment. FIG. 6 shows the upper surface of the damping sheet 1, like FIG. Similar to FIG. 2, FIG. 7 shows a cross section of the damping sheet 1 taken along line A1-A1 of FIG. FIG. 7 also shows how the damping sheet 1 is installed on the damping object 80 .

As shown in FIGS. 6 and 7, the vibration damping sheet 1 of this embodiment differs from that of the first embodiment in the form of the corner portions 12 of the restraining plate 10. As shown in FIGS. Except for this point and points related thereto, this embodiment is the same as the case of the first embodiment, so explanations of overlapping matters will be omitted as appropriate.

In this embodiment, the corner portion 12 of the constraining plate 10 includes an inclined portion 121 as in the first embodiment. In addition, in this embodiment, the corner portion 12 further includes a parallel portion 122 unlike the case of the first embodiment.

The parallel portion 122 is provided at the outer end of the inclined portion 121 . The parallel portion 122 is formed, for example, by bending all four corner portions 12 of a rectangular (here, square) plate-like body, similarly to the inclined portion 121 . For example, similar to the inclined portion 121 , the parallel portion 122 is formed by folding a rectangular plate with a line that intersects the diagonal at right angles as a crease.

Here, the parallel portion 122 is parallel to the central portion 11 . That is, the parallel portion 122 is formed so that the surface of the parallel portion 122 and the surface of the central portion 11 are along each other. In addition, the surface of the parallel portion 122 located on the vibration damping target 80 side is located closer to the central portion 11 than the surface of the damping material 20 located on the vibration damping target 80 side.

[B] Installation Method An installation method for installing the vibration damping sheet 1 on the vibration damping target 80 will be described with reference to FIG. 7 .

When installing the damping sheet 1 on the damping object 80, the restraining plate 10 faces the damping object 80 via the damping material 20, as in the case of the first embodiment. is brought close to the object 80 to be damped, the damping sheet 1 is adhered to the object 80 to be damped.

Next, as shown in FIG. 7, the parallel portion 122 is joined to the vibration damping object 80 .

Here, the parallel portion 122 is joined to the damping target 80 by welding. In this embodiment, the welding is spot welding, and the parallel portion 122 is joined to the damping target 80 which is a plate-like body. Here, a pair of electrodes 90 are installed so as to sandwich both the parallel portion 122 and the damping target 80, and spot welding is performed by applying pressure so that the parallel portion 122 and the damping target 80 are in close contact. be.

[C] Summary As described above, in the vibration damping sheet 1 of the present embodiment, the corner portion 12 of the restraining plate 10 has the parallel portion 122 parallel to the central portion 11 and the inclined portion 121 at the outer end. is provided. The damping sheet 1 of this embodiment is adhered to the damping target 80 by the adhesive layer 30, and the parallel portion 122 is joined to the damping target 80 by welding such as spot welding. Therefore, this embodiment can effectively prevent the vibration damping sheet from coming off. As a result, the damping effect can be fully exhibited.

<Third Embodiment>
[A] Configuration FIGS. 8 and 9 are diagrams schematically showing a damping sheet 1 according to a third embodiment. FIG. 8 shows the upper surface of the damping sheet 1, like FIG. FIG. 9, like FIG. 2, shows a cross section of the vibration damping sheet 1 taken along line A1-A1 of FIG. FIG. 9 also shows how the vibration damping sheet 1 is installed on the vibration damping object 80 .

As shown in FIGS. 8 and 9, the vibration damping sheet 1 of this embodiment differs from that of the first embodiment in the form of the corner portions 12 of the restraining plate 10. As shown in FIGS. Further, the vibration damping sheet 1 of this embodiment is formed with a through hole K1. Except for these points and points related to them, the present embodiment is the same as the first embodiment, and thus overlapping descriptions will be omitted as appropriate.

In the vibration damping sheet 1 of the present embodiment, the corner portion 12 of the restraining plate 10 includes the inclined portion 121 as in the first embodiment, but the inclined portion 121 is larger than in the first embodiment. .

In the first embodiment, as shown in FIG. 1, in a rectangular plate-like body, a line located closer to the vertex v than the midpoint m of the line connecting the center point C and the vertex v is folded. Thus, an inclined portion 121 is formed. On the other hand, in the present embodiment, as shown in FIG. 8, the rectangular plate is folded using a line that intersects the midpoint m of the line connecting the center point C and the vertex v as a crease. , an inclined portion 121 is formed.

In this embodiment, the through hole K1 is formed so as to penetrate the constraining plate 10, the damping material 20, and the adhesive layer 30. As shown in FIG. Here, the through hole K1 is formed so as to penetrate the center point C of the restraining plate 10. As shown in FIG.

[B] Installation Method An installation method for installing the vibration damping sheet 1 on the vibration damping object 80 will be described. Here, the installation method of the damping sheet 1 will be described using FIG. 10 together with FIG.

FIG. 10 is a diagram schematically showing a method of installing the damping sheet 1 according to the third embodiment. 10, like FIG. 9, shows a cross section of the vibration damping sheet 1 taken along line A1-A1 of FIG.

When installing the vibration damping sheet 1 on the vibration damping object 80, first, as shown in FIG.

Here, the damping sheet 1 is brought closer to the damping target 80 with the restraint plate 10 facing the damping target 80 via the damping material 20, and the stud bolt 81 is passed through the through hole K1.

Next, as shown in FIG. 3, a nut 82 is tightened on the stud bolt 81 penetrating through the through hole K1, and the inclined portion 121 is joined to the damping object 80. Next, as shown in FIG.

[C] Summary As described above, the damping sheet 1 of the present embodiment includes the through holes K1. Then, after the stud bolt 81 provided in the damping target 80 is passed through the through hole K1, the nut 82 is tightened to the stud bolt 81 passing through the through hole K1. As a result, the damping material 20 is pressed toward the object 80 to be damped, so that the damping material 20 can be brought into close contact with the object 80 to be damped. As a result, this embodiment can effectively prevent the vibration damping sheet from coming off, and can sufficiently exhibit the vibration damping effect.

In addition, when the damping material 20 is brought into close contact with the damping target 80, part of the air existing between the damping material 20 and the damping target 80 passes through the through hole K1. Therefore, the vibration damping sheet 1 can be evenly attached to the vibration damping object 80 .

[D] Modification In the above embodiment, the case where the inclined portion 121 is welded to the damping target 80 has been described, but the present invention is not limited to this. When the vibration damping sheet 1 is sufficiently fixed to the vibration damping target 80 by tightening the nut 82 to the stud bolt 81 passing through the through hole K1, the inclined portion 121 can be welded to the vibration damping target 80. It does not have to be joined. When welding is not performed, the damping material 20 is not heated by welding, so the gap G does not need to be interposed between the inclined portion 121 and the damping material 20 . The damping sheet 1 may be configured such that the damping material 20 is interposed between the inclined portion 121 and the damping object 80 .

In the above-described embodiment, the diameter of the through hole K1 is the same in both the restraint plate 10 and the damping material 20, but the diameter is not limited to this. For example, through hole K<b>1 may have a larger diameter at the portion formed in damping material 20 than at the portion formed in constraining plate 10 . As a result, for example, when the stud bolt 81 is welded to the vibration damping object 80 in order to fix the stud bolt 81 to the vibration damping object 80, the weld metal formed around the stud bolt 81 is removed from the through hole K1. It is accommodated in the part formed in the damping material 20 among them.

<Others>
Although the embodiments of the invention have been described above, the invention is not limited to the contents described above, and, of course, various omissions, replacements, and modifications can be made without departing from the gist of the invention.

For example, in the above-described embodiment, all the four corners 12 of the rectangular plate are bent to form the inclined portions 121 at all the four corners 12, but this is not the only option. do not have. The inclined portions 121 may be formed in some of the corner portions 12 instead of all of the four corner portions 12 . Also, the inclined portions 121 may be formed in at least some of the plurality of corner portions 12 of the plate-like body having a polygonal shape (for example, a triangular shape) other than a quadrilateral shape.

DESCRIPTION OF SYMBOLS 1... Vibration damping sheet 10... Restraint plate 11... Center part 12... Corner part 20... Vibration damping material 30... Adhesive layer 50... Weld metal 80... Object to be damped 81... Stud bolt 82... Nut 90 Electrode 121 Inclined portion 122 Parallel portion C Center point G Gap K1 Through hole m Middle point v Vertex

Claims (6)

a restraint plate;
a damping material provided on the restraint plate;
and an adhesive layer provided on the other side of the damping material, wherein the restraining plate is installed so as to face the object to be damped via the damping material and the adhesive layer. A vibration sheet,
The constraining plate is
a central part;
and a corner portion located at a corner of the central portion,
The corner portion is
an inclined portion inclined with respect to the central portion such that the outer end portion is located on the side of the object to be damped;
A gap is interposed between the inclined portion and the damping material, and a portion of the end portion of the inclined portion located on the side of the object to be damped and the object to be damped of the damping material. There is a gap between the extended surface of the surface located on the side of
an end portion of an inclined portion provided on one of the plurality of vibration damping sheets in a state in which the plurality of vibration damping sheets are adhered to the vibration damping object by the adhesive layer in a matrix ; In the plurality of vibration damping sheets, the ends of the inclined portions provided on the other vibration damping sheets adjacent to the one vibration damping sheet are mutually common via the weld metal, and the vibration damping is performed by fillet welding. bonded to the object,
damping sheet. the gap and the gap are in communication;
The damping sheet according to claim 1. The thickness of the damping material is thicker than the thickness of the restraint plate,
The damping sheet according to claim 1 or 2. a through hole penetrating through the restraint plate, the damping material, and the adhesive layer so as to penetrate the center point of the restraint plate;
The damping sheet according to any one of claims 1 to 3. After the through hole of the vibration damping sheet is passed through a stud bolt provided on the vibration damping target, a nut is tightened on the stud bolt passing through the through hole, thereby connecting the vibration damping material to the vibration damping target. to adhere to
The installation method of the damping sheet according to claim 4. a restraint plate;
a damping material provided on the restraint plate;
A damping sheet comprising: the constraining plate of the damping material and an adhesive layer provided on the other side thereof is arranged so that the constraining plate faces an object to be damped via the damping material and the adhesive layer. A method for installing a damping sheet, comprising:
The constraining plate is
a central part;
and a corner portion located at a corner of the central portion,
The corner portion is
an inclined portion inclined with respect to the central portion such that the outer end portion is located on the side of the object to be damped;
A gap is interposed between the inclined portion and the damping material, and a portion of the end portion of the inclined portion located on the side of the object to be damped and the object to be damped of the damping material. There is a gap between the extended surface of the surface located on the side of
The installation method of the damping sheet is
a step of adhering a plurality of the damping sheets to the damping object by means of the adhesive layer in a matrix ;
In the plurality of vibration damping sheets adhered to the vibration damping object, the end of the inclined portion provided on one vibration damping sheet and the other vibration damping sheet adjacent to the one vibration damping sheet and joining the end of the sloped portion to the damping target by fillet welding via a common weld metal .
Installation method of damping sheet.

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