| 摘要 |
PROBLEM TO BE SOLVED: To heighten a vibration frequency, and easily resonate with idling because right and left ends of a connection pipe are fused to right and left frame members and the right and left frame members are connected and integrated to each other with the connection pipe into a highly rigid body. SOLUTION: A guide pin 28 is fused to left and right frame members 20L, 20R and projected on their inner faces, and right and left ends of a connection pipe 22 are freely fitted with the guide pin 28. Only one end, for example the left end 22L of the connection pipe 22 is fused to the guide pin 28, and the right end of the connection pipe 22 is freely fitted to the guide pin 28 and is not fused, so that rigidity of connection of the connection pipe 22 and the left and right frame members 20L, 20R is different on right and left sides. COPYRIGHT: (C)2009,JPO&INPIT
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