Heat insulator and fastening structure for same

Abstract

A heat insulator fastening structure includes: a heat insulator which is configured so as to cover an exhaust manifold; and fasteners which are configured so as to fasten the heat insulator to an object to which the heat insulator is to be fastened, the heat insulator being fastened so as to be displaceable in a predetermined range. The heat insulator has: a single first region which is configured so as to vibrate in the same phase; and a single second region which is different from the first region and which is configured so as to vibrate in the same phase. At least one of the fasteners fastens the first region to the object to which the heat insulator is to be fastened. At least another one of the fasteners fastens the second region to the object to which the heat insulator is to be fastened.

1 . A heat insulator fastening structure comprising:
 a heat insulator adapted to cover an exhaust manifold; and   a plurality of fasteners adapted to fasten the heat insulator to a fastening target object in a manner in which the heat insulator is movable within a predetermined range, wherein   the heat insulator includes a first area, which is adapted to vibrate in a single phase, and a second area, which is different from the first area and is adapted to vibrate in a single phase,   the first area is fastened to the fastening target object with at least one of the fasteners, and   the second area is fastened to the fastening target object with at least another one of the fasteners.   
     
     
         2 . The heat insulator fastening structure according to  claim 1 , wherein the heat insulator is adapted to be fastened to the fastening target object only in the first area and the second area. 
     
     
         3 . The heat insulator fastening structure according to  claim 1 , wherein
 the first area is located at an upper portion of the heat insulator, and   the second area is located in a center in an up-down direction of the heat insulator.   
     
     
         4 . The heat insulator fastening structure according to  claim 1 , wherein
 the heat insulator has two opposite end portions and a central portion located between the end portions,   the first area is located in one of the end portions, and   the second area is located in the central portion.   
     
     
         5 . The heat insulator fastening structure according to  claim 1 , wherein the heat insulator is fastened to the fastening target object at two positions in the first area and is fastened to the fastening target object at two positions in the second area. 
     
     
         6 . The heat insulator fastening structure according to  claim 1 , wherein the heat insulator is fastened to the fastening target object at two positions in the first area and is fastened to the fastening target object at one position in the second area. 
     
     
         7 . The heat insulator fastening structure according to  claim 1 , wherein the fastening target object is the exhaust manifold. 
     
     
         8 . A heat insulator, which is adapted to cover an exhaust manifold and be fastened to a fastening target object with a plurality of fasteners in a manner in which the heat insulator is movable within a predetermined range, the heat insulator comprising:
 a first area having a fastened portion adapted to vibrate in a single phase and be fastened to the fastening target object with at least one of the fasteners; and   a second area having a fastened portion adapted to vibrate in a single phase and be fastened to the fastening target object with at least another one of the fasteners.