MEASURING METHOD FOR CAMBER OF CRANE GIRDER

Title:

MEASURING METHOD FOR CAMBER OF CRANE GIRDER

Document Type and Number:

Japanese Patent JPH03195910

Kind Code:

A

Abstract:

PURPOSE:To obtain a measuring method of a camber of a crane girder which is safe and reliable and requires a shorter time of operation, by fixing the position of a laser light emitting member and by moving a laser light sensing member on the girder. CONSTITUTION:First a light-emitting member 32 is disposed at the center of one saddle part 14 of a girder 12. When the girder 12 is inclined in the longitudinal direction, an optical axis is adjusted so that a laser light be parallel to an angle of this inclina tion. Next, a light-sensing member 52 is moved along the longitudinal direction of the girder 12 and a support 54 is erected at a plurality of places. The number of measuring points is varied in accordance with a span. The main body 56 of a light- sensing element of the light-sensing member 52 is moved up or down along the support 54 by an operation of a remote controller 64 at each measuring point, and thereby the light-sensing element, i.e. a target plate 58, is set at a position whereat the laser light is sensed. In this state the height position of the target plate 58 is detected by a gage of the support 54 and a height indicating function of the main body 56. By determining a height difference between the measuring points from the data on the height positions of the target plate 58 obtained at the measuring points, lastly, a camber of the girder 12 can be calculated.

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Inventors:

TSUNODA KAKICHI
MIZOHATA HIKARI
IKEDA TAMOTSU

Application Number:

JP33478689A

Publication Date:

August 27, 1991

Filing Date:

December 26, 1989

Export Citation:

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Assignee:

NIPPON KOKAN KK

International Classes:

G01B11/24; B66C6/00; B66C17/00; (IPC1-7): B66C6/00; B66C17/00; G01B11/24

Attorney, Agent or Firm:

Takehiko Suzue (2 outside)

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