| 摘要 |
PURPOSE:To instantaneously discriminate whether a self-propelling crane vehicle or a large vehicle passes through an anxious place by displaying the min. outside revolving locus and min. inside revolving locus of a vehicle whose reduced scale is equal to that of a map on a transparent member. CONSTITUTION:A passing discrimination device 1 is formed from a transparent member, for example, a plastic plate. The min. inside revolving locus 11 of a self-propelling crane vehicle and a boom leading end revolving locus 12 (min. outside revolving locus) are displayed on the surface of the passing discrimination device 1 in the reduced scale corresponding to the reduced scale of a surveyed map (map) 2. The discrimination device 1 is pressed to the surveyed map 2 and the locus 11 upwardly inclinecd leftward by about 45 deg. from the crossing point of the center line 14A of the discrimination device 1 is brought into contact with a bent angle 4a. When the locus 12 is not brought into contact with an outside bent angle 4b, it is judged that the self-propelling vehicle can pass. When the discrimination device 1 is used, it can be discriminated that the vehicle can pass on the surveyed map at a glance. Therefore, the movability of the self-propelling crane vehicle can be judged in a business stage before execution and the confusion in an execution stage is prevented. |
