Abstract:
A vibration-damping material which can be arranged without gaps along the shape of the outer surface of a base material, that is, a vibration-damping material which is attached to a convex curved outer surface of a base material and comprises a vibration-damping member capable of bending deformation and having multiple cuts in an attachment surface to be adhered to the outer surface, thereby dividing the attachment surface into multiple blocks, with the surface of each block opposite the attachment surface being formed connected to each other.

Description:
TECHNICAL FIELD 
       [0001]    The present invention relates to a vibration-damping material attached to an outer surface of a base material, the vibration of which is desired to be suppressed, and to a method for attaching a vibration-damping material in which a vibration-damping material is attached to a base material. 
       BACKGROUND ART 
       [0002]    In the related art, a multi-layer soundproofing material disclosed in PTL 1 is applied to an uneven-surface base material (structural member) having a convex surface or the like. The multi-layer soundproofing material is a multi-layer sheet-like object in which a vibration-damping member, that is, a viscoelastic member, is provided on a base material side, and a sound absorbing member is provided on the outside of the vibration-damping member. Cuts are provided in the sound absorbing member so as, to correspond to a convex surface, and the sound absorbing member is attached to the base material with gaps formed in cut portions. 
       CITATION LIST 
     Patent Literature 
       [0003]    [PTL 1] Japanese Unexamined Patent Application Publication No. 64-42227 
       SUMMARY OF INVENTION 
     Technical Problem 
       [0004]    According to technology disclosed in PTL 1, the vibration-damping member is formed of a viscoelastic member, and conforms to and is in close contact with the convex surface of the uneven-surface base material. The vibration-damping member may be able to conform to the shape of an outer surface of a straight portion (straight tubular portion) of a pipe. In contrast, the vibration-damping member is unlikely to be able to conform to the shape of an outer surface of a bent portion of a pipe, which is deformed in a complex manner in multiple directions. In this case, the vibration-damping material may be wrinkled, and thus gaps between the vibration-damping member and the base material are formed, and vibration damping performance is decreased. According to the technology disclosed in PTL 1, the conformation of the vibration-damping member to the shape of the base material is obtained by thermally softening the vibration-damping material, and then the vibration-damping member is hardened by a curing agent, thereby requiring an amount of labor and time for attaching the vibration-damping member to the base material. 
         [0005]    The present invention is made to solve this problem, and an object of the present invention is to provide a vibration-damping material which can be disposed along the shape of an outer surface of a base material without gaps between the vibration-damping material and the base material, and a method for attaching a vibration-damping material. 
       Solution to Problem 
       [0006]    According to an aspect of the present invention, in order to achieve the aforementioned object, there is provided a vibration-damping material which is attached to a convex outer surface of a base material, the material including: a vibration-damping member which can be deformed in a bending manner, is partitioned into multiple blocks by multiple cuts which are formed in an attachment surface adhered to the outer surface, and is formed by connecting together portions of the blocks, with the portions positioned close to a surface which is opposite to the attachment surface. 
         [0007]    In the vibration-damping material, since the surface opposite to the attachment surface is continuously formed, when the attachment surface of the vibration-damping member is adhered to the outer surface of the base material, in a state where the separation of the portions (positioned close to the surface) of the blocks from each other by the cuts is restricted, facing surfaces of the blocks are in close contact with each other with the cuts interposed between the facing surfaces, and the vibration-damping member is continuously attached to the outer surface of the base material along the convex shape of the outer surface without gaps between the vibration-damping member and the outer surface. As a result, the entirety of the vibration-damping member can be deformed in a bending manner sufficiently to dissipate vibration energy of the base material, and it is possible to considerably suppress vibration of the base material. In addition, since the vibration-damping member is disposed in such a way that the facing surfaces of the multiple blocks are in close contact with each other with the cuts interposed between the facing surfaces, vibration energy of the base material is dissipated by frictional resistance of the surfaces in close contact with each other. As a result, it is possible to improve vibration suppressing performance of the vibration-damping material. 
         [0008]    In the vibration-damping material of the present invention, the vibration-damping member is partitioned into the multiple blocks by the cuts, and is formed by connecting together the portions of the blocks via a sheet-like member, with the portions positioned close to the surface which is opposite to the attachment surface. 
         [0009]    In the vibration-damping material, since the blocks are held by the sheet-like member in order for the cuts to suppress the separation of the portions (positioned close to the surface) of the blocks from the sheet-like member, close contact between the facing surfaces of the blocks of the vibration-damping member can be improved with the cuts interposed between the facing surfaces. As a result, it is possible to improve vibration suppressing performance. 
         [0010]    In the vibration-damping material of the present invention, each of the cuts of the vibration-damping member is formed into the shape of a V-shaped groove, the width of which gradually increases toward the attachment surface. 
         [0011]    In the vibration-damping material, since each of the cuts is formed into the shape of a V-shaped groove, the width of which gradually increases toward the attachment surface, when the vibration-damping member is attached to the convex outer surface of the base material, in a case where the facing surfaces of the blocks of the vibration-damping member are in close contact with each other with the cuts interposed between the facing surfaces, deformation of the vibration-damping member can be suppressed by the V-shaped grooves. As a result, it is possible to ensure the amount of bending deformation of the vibration-damping member caused by vibration of the base material, and to improve vibration suppressing performance. 
         [0012]    In the vibration-damping material of the present invention, the attachment surface of the vibration-damping member is partitioned into polygonal blocks by the cuts. 
         [0013]    In the damping-vibration material, since the attachment surface, which is partitioned in a polygonal pattern, is adopted, the vibration-damping material can be attached to the outer surface of the base material, which is formed into various convex shapes. 
         [0014]    According to another aspect of the present invention, in order to achieve the aforementioned object, there is provided a method for attaching a vibration-damping material in which a vibration-damping material is attached to a convex outer surface of a base material, in which a vibration-damping member is partitioned into multiple blocks by forming cuts in an attachment surface of the vibration-damping member adhered to the outer surface of the base material, the vibration-damping material is formed by connecting together the blocks via the provision of a sheet-like member on portions of the blocks, with the portions positioned close to a surface which is opposite to the attachment surface, and the attachment surface of the vibration-damping member is adhered to the outer surface of the base material. 
         [0015]    According to the method for attaching a vibration-damping material, since the portions (positioned close to the surface) of the blocks partitioned from each other by the cuts are connected to each other via the sheet-like member, when the sheet-like member is wrapped around the base material along the convex shape of the outer surface of the base material, the blocks of the vibration-damping member can be adhered to the outer surface of the base material along the convex shape of the outer surface. As a result, it is possible to easily attach the vibration-damping material to the outer surface of the base material. 
         [0016]    In the method for attaching a vibration-damping material of the present invention, each of the cuts of the vibration-damping member is formed into the shape of a V-shaped groove, the width of which gradually increases toward the attachment surface. 
         [0017]    According to the vibration-damping material attachment method, since each of the cuts is formed into the shape of a V-shaped groove, the width of which gradually increases toward the attachment surface, when the vibration-damping member is attached to the convex outer surface of the base material, in a case where the facing surfaces of the blocks of the vibration-damping member are in close contact with each other with the cuts interposed between the facing surfaces, deformation of the vibration-damping member can be suppressed by the V-shaped grooves. As a result, resilience of the vibration-damping member caused by deformation is suppressed, and thus, it is possible to easily attach the vibration-damping material to the outer surface of the base material. 
       Advantageous Effects of Invention 
       [0018]    According to the present invention, a vibration-damping material can be disposed along the shape of an outer surface of a base material without gaps between the vibration-damping material and the base material. 
     
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         [0019]      FIG. 1  is a sectional view of a vibration-damping material in an embodiment of the present invention. 
           [0020]      FIG. 2  is a top view of the vibration-damping material in the embodiment of the present invention. 
           [0021]      FIG. 3  is a sectional view illustrating an attachment state of the vibration-damping material in the embodiment of the present invention. 
           [0022]      FIG. 4  is a sectional view illustrating another example of the vibration-damping material in the embodiment of the present invention. 
           [0023]      FIG. 5  is a sectional view illustrating still another example of the vibration-damping material in the embodiment of the present invention. 
           [0024]      FIG. 6  is a top view illustrating still another example of the vibration-damping material in the embodiment of the present invention. 
           [0025]      FIG. 7  is a top view illustrating still another example of the vibration-damping material in the embodiment of the present invention. 
           [0026]      FIG. 8  is a top view illustrating still another example of the vibration-damping material in the embodiment of the present invention. 
       
    
    
     DESCRIPTION OF EMBODIMENTS 
       [0027]    Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. The present invention is not limited by this embodiment. Configuration elements in the embodiment include elements which can be easily replaced by the skilled person in the art, or substantially the same elements. 
         [0028]      FIG. 1  is a sectional view of a vibration-damping material in the embodiment.  FIG. 2  is a top view of the vibration-damping material in the embodiment.  FIG. 3  is a sectional view illustrating an attachment state of the vibration-damping material in the embodiment.  FIGS. 4 and 5  are sectional views illustrating other examples of the vibration-damping material in the embodiment.  FIGS. 6 to 8  are top views illustrating other examples of the vibration-damping material in the embodiment. 
         [0029]    As illustrated in  FIGS. 1 . to  3 , a vibration-damping material  1  in the embodiment is adhered to a convex outer surface  10   a  (as illustrated in  FIG. 3 ) of a base material  10 . In  FIG. 3 , a pipe is illustrated as the base material  10 . The sectional shape (illustrated in  FIG. 3 ) of a straight portion (straight pipe portion) of a pipe is continuously formed straightly, and in a bent portion of the pipe, bends in multiple directions are formed in a complex manner on an outer surface of the bent portion by adding bent convexities to a convex sectional shape, and a partial spherical shape is formed. The base material  10  is not limited to a pipe. The base material  10  may be a plate-like member, a columnar member, or the like insofar as each of these members includes the convex outer surface  10   a.    
         [0030]    The vibration-damping material  1  includes a vibration-damping member  2 . The vibration-damping member  2  is adhered to the outer surface  10   a  of the base material  10 , and suppresses vibration of the base material  10  by dissipating vibration energy of the base material  10  mainly via bending deformation. Accordingly, a vibration-damping member adopted as the vibration-damping member  2  can be deformed in a bending manner by vibration energy of the base material  10 . 
         [0031]    The vibration-damping member  2  includes an attachment surface  2   a  adhered to the outer surface  10   a  of the base material  10 , and a surface  2   b  provided opposite to the attachment surface  2   a  in a thickness direction (a direction in which the surface  2   b  is positioned away from the outer surface  10   a  of the base material  10 ). Multiple cuts  2   c  are formed in the attachment surface  2   a  of the vibration-damping member  2 . The cuts  2   c  are formed in the attachment surface  2   a  in such a way as to intersect with each other, and thus, the vibration-damping member  2  is partitioned into multiple blocks  2   d . In  FIG. 2 , the cuts  2   c  are formed in such a way as to intersect with each other in a matrix pattern, and the multiple blocks  2   d  having a rectangular shape in a top view are formed. 
         [0032]    The vibration-damping member  2  is formed in such a way that portions (positioned close to the surface  2   b ) of the multiple blocks  2   d  are connected to each other. With regard to the configuration of connection, as illustrated in  FIGS. 1 and 3 , a sheet-like member  3  is provided on the surface  2   b  of the vibration-damping member  2 , and thus, portions (positioned close to the surface  2   b ) of the blocks  2   d  partitioned from each other by the cuts  2   c  are connected to each other via the sheet-like member  3 . When the vibration-damping material  1  is attached to the outer surface  10   a  of the base material  10  as illustrated in  FIG. 3 , a member adopted as the sheet-like member  3  can be deformed in a bending manner along the convex shape of the outer surface  10   a . Specifically, a rubber member, a non-woven polyester-based fabric, or the like is preferably used as the sheet-like member  3 . 
         [0033]    With regard to the configuration of the connection of the multiple blocks  2   d  in the vibration-damping member  2 , as illustrated in  FIG. 4 , the cuts  2   c  may be provided to end in the middle of the vibration-damping member  2  in the thickness direction without passing through the surface  2   b  such that the vibration-damping member  2  is partitioned into the blocks  2   d , and the portions (positioned close to the surface  2   b ) of the blocks  2   d  are connected to each other. 
         [0034]    As illustrated in  FIG. 3 , the attachment surface  2   a  of the vibration-damping member  2  is adhered to the outer surface  10   a  of the base material  10  such that the vibration-damping material  1  is attached to the base material  10 . The vibration-damping member  2  may be adhered to the base material  10  using an adhesive, a double-sided adhesive sheet, or the like. Since the surface  2   b  opposite to the attachment surface  2   a  is continuously formed, the vibration-damping member  2  is disposed along the convex shape of the outer surface  10   a  of the base material  10  in a state where the separation of the portions (positioned close to the surface  2   b ) of the blocks  2   d  from each other by the cuts  2   c  is restricted. For this reason, while facing surfaces of the blocks  2   d  are in close contact with each other with the cuts  2   c  interposed between the facing surfaces, the vibration-damping member  2  can be deformed in a bending manner such that the vibration-damping member  2  is continuously attached to the outer surface  10   a  of the base material  10  along the convex shape of the outer surface  10   a  without gaps between the vibration-damping member  2  and the outer surface  10   a . Since the cuts  2   c  are formed in the attachment surface  2   a  of the vibration-damping member  2  in such a way as to intersect with each other, while the facing surfaces of the blocks  2   d  are in close contact with each other, the vibration-damping member  2  is deformed to conform to the convex outer surface  10   a  which is deformed in a complex manner in multiple directions along the bent portion of the pipe. The cuts  2   c  may be formed straightly with respect to the convex outer surface  10   a  having a uniform curvature like the straight portion (straight pipe portion) of the pipe. The vibration-damping member  2  is deformed to conform to the shape of the outer surface  10   a  while the facing surfaces of the blocks  2   d  are in close contact with each other. 
         [0035]    In a case where the vibration-damping material  1  includes the sheet-like member  3 , since the portions (positioned to close to the surface  2   b ) of the blocks  2   d  partitioned from each other by the cuts  2   c  are connected to each other via the sheet-like member  3 , when the vibration-damping material  1  is wrapped around the base material  10  along the convex shape of the outer surface  10   a  of the base material  10 , it is possible to adhere the blocks  2   d  of the vibration-damping member  2  to the outer surface  10   a  of the base material  10  along the convex shape of the outer surface  10   a.    
         [0036]    As such, the vibration-damping material  1  in the embodiment is attached to the convex outer surface  10   a  of the base material  10 . The vibration-damping material  1  includes the vibration-damping member  2  which can be deformed in a bending manner, is partitioned into the multiple blocks  2   d  by the multiple cuts  2   c  which is formed in the attachment surface  2   a  adhered to the outer surface  10   a , and is formed by connecting together the portions (positioned close to the surface  2   b  which is opposite to the attachment surface  2   a ) of the blocks  2   d.    
         [0037]    In the vibration-damping material  1 , since the surface  2   b  opposite to the attachment surface  2   a  is continuously formed, when the attachment surface  2   a  of the vibration-damping member  2  is adhered to the outer surface  10   a  of the base material  10 , in a state where the separation of the portions (positioned close to the surface  2   b ) of the blocks  2   d  from each other by the cuts  2   c  is restricted, the facing surfaces of the blocks  2   d  are in close contact with each other with the cuts  2   c  interposed between the facing surfaces, and the vibration-damping member  2  is continuously attached to the outer surface  10   a  of the base material  10  along the convex shape of the outer surface  10   a  without gaps between the vibration-damping member  2  and the outer surface  10   a . As a result, the entirety of the vibration-damping member  2  can be deformed in a bending manner sufficiently enough to dissipate vibration energy of the base material  10 , and it is possible to considerably suppress vibration of the base material  10 . In addition, in the vibration-damping material  1 , since the vibration-damping member  2  is disposed in such a way that the facing surfaces of the multiple blocks  2   d  are in close contact with each other with the cuts  2   c  interposed between the facing surfaces, vibration energy of the base material  10  is dissipated by frictional resistance of the surfaces in close contact with each other. As a result, it is possible to improve vibration suppressing performance of the vibration-damping material  1 . 
         [0038]    In the vibration-damping material  1  in the embodiment, the vibration-damping member  2  is partitioned into the multiple blocks  2   d  by the cuts  2   c , and the portions (positioned close to the surface  2   b  opposite to the attachment surface  2   a ) of the blocks  2   d  are connected to each other via the sheet-like member  3 . 
         [0039]    In the vibration-damping material  1 , since the blocks  2   d  are held by the sheet-like member  3 , and the separation of the portions (positioned close to the surface  2   b ) of the blocks  2   d  from each other by the cuts  2   c  is suppressed, close contact between the facing surfaces of the blocks  2   d  of the vibration-damping member  2  can be improved with the cuts  2   c  interposed between the facing surfaces. As a result, it is possible to improve vibration suppressing performance. 
         [0040]    In the vibration-damping material  1  in the embodiment, as illustrated in  FIG. 5 , each of the cuts  2   c  of the vibration-damping member  2  is preferably formed into the shape of a V-shaped groove, the width of which gradually increases toward the attachment surface  2   a.    
         [0041]    In the vibration-damping material  1 , since each of the cuts  2   c  is formed into the shape of a V-shaped groove, the width of which gradually increases toward the attachment surface  2   a , when the vibration-damping member  2  is attached to the convex outer surface  10   a  of the base material  10 , in a case where the facing surfaces of the blocks  2   d  of the vibration-damping member  2  are in close contact with each other with the cuts  2   c  interposed between the facing surfaces, deformation of the vibration-damping member  2  can be suppressed by the V-shaped grooves. As a result, it is possible to ensure the amount of bending deformation of the vibration-damping member  2  caused by vibration of the base material  10 , and to improve vibration suppressing performance. 
         [0042]    In the vibration-damping material  1  in the embodiment, as illustrated in  FIGS. 2, and 6 to 8 , the attachment surface  2   a  of the vibration-damping member  2  is preferably partitioned into polygonal blocks  2   d  by the cuts  2   c.    
         [0043]      FIG. 2  is a view illustrating a pattern in which the vibration-damping member  2  is partitioned into the rectangular blocks  2   d  by the cuts  2   c .  FIG. 6  is a view illustrating a pattern in which the vibration-damping member  2  is partitioned into triangular blocks  2   d  by the cuts  2   c .  FIG. 7  is a view illustrating a pattern in which the vibration-damping member  2  is partitioned into pentagonal blocks  2   d  by the cuts  2   c .  FIG. 8  is a view illustrating a pattern in which the vibration-damping member  2  is partitioned into hexagonal blocks  2   d  by the cuts  2   c . Since the attachment surface  2   a  of the vibration-damping member  2 , which is partitioned in a polygonal pattern, is adopted, the vibration-damping material  1  can be attached to the outer surface  10   a  of the base material  10 , which is formed into various convex shapes. 
         [0044]    A method for attaching a vibration-damping material in the embodiment is a method of attaching vibration-damping material  1  to the convex outer surface  10   a  of the base material  10 . The vibration-damping member  2  is partitioned into the multiple blocks  2   d  by forming the cuts  2   c  in the attachment surface  2   a  of the vibration-damping member  2  adhered to the outer surface  10   a  of the base material  10 . The vibration-damping material  1  is formed by connecting together the blocks  2   d  via the provision of the sheet-like member  3  on the portions of the blocks  2   d , with the portions positioned close to the surface  2   b  which is opposite to the attachment surface  2   a . The attachment surface  2   a  of the vibration-damping member  2  is adhered to the outer surface  10   a  of the base material  10 . 
         [0045]    According to the method for attaching a vibration-damping material, since the portions (positioned close to the surface  2   b ) of the blocks  2   d  partitioned from each other by the cuts  2   c  are connected to each other via the sheet-like member  3 , when the sheet-like member  3  is wrapped around the base material  10  along the convex shape of the outer surface  10   a  of the base material  10 , the blocks  2   d  of the vibration-damping member  2  can be adhered to the outer surface  10   a  of the base material  10  along the convex shape of the outer surface  10   a . As a result, it is possible to easily attach the vibration-damping material  1  to the outer surface  10   a  of the base material  10 . 
         [0046]    According to the vibration-damping material attachment method in the embodiment, each of the cuts  2   c  of the vibration-damping member  2  is preferably formed into the shape of a V-shaped groove, the width of which gradually increases toward the attachment surface  2   a.    
         [0047]    According to the vibration-damping material attachment method, since each of the cuts  2   c  is formed into the shape of a V-shaped groove, the width of which gradually increases toward the attachment surface  2   a , when the vibration-damping member  2  is attached to the convex outer surface  10   a  of the base material  10 , in a case where the facing surfaces of the blocks  2   d  of the vibration-damping member  2  are in close contact with each other with the cuts  2   c  interposed between the facing surfaces, deformation of the vibration-damping member  2  can be suppressed by the V-shaped grooves. As a result, resilience of the vibration-damping member  2  caused by deformation is suppressed, and thus, it is possible to easily attach the vibration-damping material  1  to the outer surface  10   a  of the base material  10 . 
       REFERENCE SIGNS LIST 
       [0048]      1 : VIBRATION-DAMPING MATERIAL 
         [0049]      2 : VIBRATION-DAMPING MEMBER 
         [0050]      2   a : ATTACHMENT SURFACE 
         [0051]      2   b : SURFACE 
         [0052]      2   c : CUT 
         [0053]      2   d : BLOCK 
         [0054]      3 : SHEET-LIKE MEMBER 
         [0055]      10 : BASE MATERIAL 
         [0056]      10   a : OUTER SURFACE