An example of a conventional engine support structure is described in Unexamined Japanese Patent Application Publication No. 2002-160663, Vehicle Body Front Portion Structure. For the structure described in Unexamined Japanese Patent Application Publication No. 2002-160663, as shown in FIG. 4 (a), sub-frame 51 is disposed below vehicle body front frame member 50, which extends in the front to rear direction of the vehicle, so that a predetermined distance is formed above and below said vehicle body front frame member 50 and so that it extends in the front to rear direction of the vehicle, and the front end of aforementioned vehicle body front frame member 50 and the front end of sub-frame 51 are connected by means of connecting member 52, which extends in the upper to lower direction. In addition, the engine is loaded onto aforementioned sub-frame 51.
Therefore, when a predetermined load or more is input from the front of the vehicle toward the rear due to a collision, a means is devised to increase the energy absorbing efficiency of this input load by collapsing and deforming the aforementioned vehicle body front frame member 50.
Conventionally, as cited in Unexamined Japanese Patent Application Publication No. 2003-246276, for example, the vehicle body and sub-frame are connected via a supporting elastic body, such as an insulator for absorbing the vibration, and a spacer for filling the space that is formed between the vehicle body and the sub-frame.
For the technology disclosed in aforementioned Unexamined Japanese Patent Application Publication No. 2003-246276, a spacer is disposed between the vehicle body and the sub-frame into which an insulator has been inserted. This spacer and insulator are securely tightened to the vehicle body by means of a bolt that penetrates in the upper to lower direction through the bottom of the sub-frame. In addition, below the insulator and sub-frame is disposed a stopper for preventing the sub-frame from falling out due to breakage caused by deterioration of the insulator over time.