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Patent Searching and Data


Title:
FOOTSTEP OF ESCALATOR
Document Type and Number:
Japanese Patent JPH03284594
Kind Code:
A
Abstract:

PURPOSE: To form a riser with its gap not so spread by forming a circular arc which passes through a riser upper end in the intermediate between a circular arc, provided with a center point of a footstep front wheel serving as the center and a distance to the riser upper end serving as radius, and a circular arc provided with a point in a footstep point end part serving as the center and a distance to the riser upper end serving as the radius.

CONSTITUTION: A surface of a riser 4 is formed so that its sectional shape obtains a circular arc M of radius T with a point E on A to C serving as the center. The circular arc M is positioned in the intermediate between a circular arc L, in which an L distance S of connecting the center, when a footstep is floated, that is the center C of a front wheel to an upper end B of the riser serves as the radius, and a circular arc K of radius R of connecting the conventional A and B, and further the circular arc M is formed by connecting a position D enough for only holding a gap between adjacent footsteps. That is, the circular arc is formed with an almost intermediate point on a line, connecting the point of the above- mentioned footstep point end part to the center point of the front wheel, serving as the center and a distance from this center to the riser upper end part serving as the radius. Consequently, in the case of the footstep floated by force applied to the riser 4 by foreign matter, possibility of further drop in thereof is eliminated by almost not increasing a gap G between the riser 4 and the point end part of the rear adjacent footstep.


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Inventors:
NAKAJIMA MOTOHIRO
Application Number:
JP1990000081103
Publication Date:
December 16, 1991
Filing Date:
March 30, 1990
Export Citation:
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Assignee:
TOSHIBA CORP
International Classes:
B66B29/02; B66B23/12; (IPC1-7): B66B23/12; B66B29/02