Reclamation pipe boring apparatus for sewerage

Abstract

A reclamation pipe boring apparatus for sewerage wherein a vehicle body ( 14 ) is provided with an outrigger ( 20 ) upwardly projecting via the center thereof and actuated by hydraulic pressure, a cutting device ( 25 ) disposed in the front region of the vehicle body ( 14 ), actuated by hydraulic pressure and having a rotary cutter ( 24 ) at the front end, lift means ( 30 ) actuated by hydraulic pressure to move the cutting device ( 25 ) up and down, reach means ( 35 ) actuated by hydraulic pressure to move the cutting device ( 25 ) back and forth, and swing means ( 40 ) actuated by hydraulic pressure to turn the cutting device ( 25 ) clockwise and counterclockwise.

What is claimed is:  
     
         1 . A reclamation pipe boring apparatus for sewerage, comprising: 
 a vehicle body  14 ;    an outrigger upwardly projecting via the center of said vehicle body  14  and actuated by hydraulic pressure;    a cutting device  25  disposed in the front region of said vehicle body  14  and actuated by hydraulic pressure, said cutting device having a rotary cutter  24  at the front end of said cutting device;    lift means  30  actuated by hydraulic pressure to vertically move said cutting device  25 ;    reach means  35  disposed in said vehicle body and actuated by hydraulic pressure to longitudinally move said cutting device  25 ; and    swing means  40  disposed within said vehicle body and actuated by hydraulic pressure to laterally turn said cutting device  25 .    
     
     
         2 . A reclamation pipe boring apparatus for sewerage as defined in    claim 1   , which includes an outrigger control valve  51  to control the hydraulic pressure for actuating said outrigger  20 , a cutting control valve  52  to control the hydraulic pressure for actuating said rotary cutter  24  of said cutting device  25 , a lift control valve  53  to control the hydraulic pressure for actuating said lift means  30 , a reach control valve  54  to control the hydraulic pressure for actuating said reach means  35 , and a swing control valve  55  to control the hydraulic pressure for actuating said swing means  40 .  
     
     
         3 . A reclamation pipe boring apparatus for sewerage as defined in    claim 1    or    2   , wherein said vehicle body  14  is comprised of a plurality of longitudinally separated segments, wherein said segments are detachably coupled through a coupling section of said vehicle body, respectively.  
     
     
         4 . A reclamation pipe boring apparatus for sewerage as defined in either one of    claims 1    to    3   , wherein said cutting device  25  includes a laser beam emitting section  28  for emitting a laser beam toward the region to be cut by said rotary cutter  24 .  
     
     
         5 . A reclamation pipe boring apparatus for sewerage as defined in    claim 4   , wherein said laser beam emitting section  28  is pluralized, wherein said plurality of laser beam emitting sections are arranged at positions symmetrical with respect to the rotation center of said rotary cutter  24 , respectively.  
     
     
         6 . A reclamation pipe boring apparatus for sewerage as defined in either one of    claims 1    to    5   , wherein said lift means  30  includes a link  87  having a fulcrum located at one end of said link, a movable point located at another end of said link to provide the vertical movement of said cutting device  25 , and an actuated point located at the midpoint of said link and actuated by hydraulic pressure, wherein a link ratio of said link  87  is adapted to provide the amount of displacement of said movable point larger than that of said actuated point.