| 摘要 |
The present invention relates to a pile driver which is construction equipment for punching an excavation hole on the ground or for driving a pile. When a track frame (20) of a caterpiller type pile driver is connected with a lower center frame (10) of a vehicle body (11), a pair of dividing plates (50) are symmetrically hinge-connected with the leading end of a slide bar (40) in both sides of the center frame (10) penetrated and combined with the track frame (20). Moreover, when the track width is reduced, the dividing plate (50) is attached to the track width by symmetrically rotating the dividing plate (50) exposed to the outside of the track frame (20). Therefore, a protrusion is not formed outside the vehicle body (11) of a pile driver where the track width is reduced. According to the present invention, when the track width of the caterpiller type pile driver is reduced, a single protrusion is not formed outside the vehicle body (11). Therefore, the stability and the convenience of moving and transferring can be improved, and the accident due to a protrusion can be prevented when a trailer is mounted and transferred, or when a pile driver is moving by itself. When the track width is expanded, the width between both tracks is expanded as the desired distance, and then the additional extension is automatically suppressed. Therefore, the track width can be safely expanded quickly and conveniently without a separate signaler outside a vehicle. |
