Title:
MANHOLE COVER FRAME REMOVING TOOL AND REMOVING METHOD THEREOF
Document Type and Number:
Japanese Patent JP2595466
Kind Code:
B2
Abstract:
PURPOSE: To provide a tool which adopts a hydraulic cylinder/jack as a drive means of a stopper for its expansion adjustment and eliminates deformations produced by an angle previously adopted and increases its rigidity, and what is more, secures prompt workability.
CONSTITUTION: A hydraulic jack 1 for a wedge material and a stopper hydraulic jack 4 are installed to a base plate 9 in the radial direction. The expansion opposed end face of each of the hydraulic jacks 1 and 4 forms a groove in the vertical direction around a removing tool of a manhole frame placed in contact with a center block 2 and a manhole frame 17. A chipped recessed part is formed in the horizontal direction at the removal position. The tip of a wedge material 6 of the removing tool is chipped so as to create a recessed part, which is maintained. The wedge material 6 is penetrated in the radial direction so as to cause the generation of cracks. When the cracks have reached the groove, the penetration of the wedge material 6 is arranged to come to a halt.
Inventors:
Shibuya Shoichi
Application Number:
JP11400194A
Publication Date:
April 02, 1997
Filing Date:
April 27, 1994
Export Citation:
Assignee:
Shibuya Shoichi
International Classes:
E02D29/14; E02D29/12; (IPC1-7): E02D29/12
Domestic Patent References:
| JP6250527A | ||||
| JP62100984U | ||||
| JP3115145U |
Attorney, Agent or Firm:
Akiyama High