To easily perform part number specifying work of maintenance parts to be remarked by designating a part number in a retrieval result and the page of a drawing image of the part number and next displaying a desired drawing image.
A storing part 2a is a main storing part that consists of an ROM which stores a processing program that is carried out by a controlling part 5 and an RAM which is used for temporary storage in input data and processing process, a restoring part 2b stores image information of a maintenance part of an elevator, and a storing part 2c stores maintenance part information of each part number of a maintenance part and temporarily stores maintenance part information that is retrieved by a storing part 2d. The part number in a retrieval result and the page of a drawing image of the part number are designated and next, a desired drawing image is shown on a display part 3 with the drawing image displayed on the part 3.
URATA SEISUKE
HASHIGUCHI SEIJI
KUDO SHINJI
