| 摘要 |
PURPOSE:To reinforce a case with a simple structure and no large cost increase without making it large-sized by connecting wall plates provided between the top plate and the bottom plate of the case with reinforcing materials. CONSTITUTION:Wall plates 1b, 1c, 1d, 1e are provided between the body bottom plate 1a of a case and the top plate 2a of a cover, a breaker and built-in components are stored in the space between the wall plates. Reinforcing materials 3' and 3 are provided between adjacent well plates 1c and 1e end between 1d and 1b respectively. Both end sections 3b and 3d of the reinforcing material 3 are coupled with receiving grooves 4b and 4d provided on the wall plates respectively. It is the same for the reinforcing material 3'. The span of each wall plate with the lengthy direction size is divided by the reinforcing material, its deformation quantity is reduced against the load such as the pressure of the arc gas generated by the action of a circuit breaker. |
