Ramp apparatus

Abstract

A ramp where footboards are always smoothly and stably held in a horizontal position without being affected by soil, pebbles, and dust, and handrails can be held at a constant height. Footboard (3) are each horizontally supported at both ends between two girders each composed of an upper chord member (1) and a lower chord member (2) that are arranged in parallel to each other. At either of the upper chord member (1) and the lower chord member (2), there is supported one end of an adjustment link for adjustably supporting the interval between the upper chord member (1) and the lower chord member (2), and at the other end, there is provided a position fixing member (9) for fixing the other end of the adjustment link at a predetermined position. Sockets (3A) for the handrails are installed in a vertical upright orientation, at side end surfaces of the footboards (3). Loosening prevention mechanisms for preventing loosening of supporting columns (23) of the handrails (22) are installed onthe sockets (3A).

Description

technical field [0001] The present invention relates to a gangway device that is used, for example, when a worker climbs up and down in a construction site such as a construction site, and is placed obliquely between the ground and a high place of work. Background technique [0002] On construction sites, workers use gangway devices to climb up and down a high work site. This gangway device is structured such that a plurality of steps are erected between a pair of left and right chord members along their lengthwise direction. [0003] However, in the conventional gangway device, since the pedals are fixedly attached to the chord members, when the gangway device, that is, the chord members, is erected at a high work site at an angle different from the usual one according to the conditions of the work site, the pedals are not horizontal, and there is a certain problem. Angle of inclination. In such a case, the foot is likely to slip on the pedal, and there is a possibility o...

AI Technical Summary

Problems solved by technology

[0005] However, since the brake parts used to keep the pedals horizontal in this prior art gangway device are arranged at the lower ends of each truss, there is a possibility of rusting easily when the grounding plate is placed on the ground or the like when it is exposed to moisture, and due to soil Or the entry of small stones will hinder the mutual movement of the brake parts and string members, and the gangway device is not easy to use

[0006] Moreover, the gangway device of the prior art is provided with handrails in most cases. Since it is directly fixed on the upper chord member at this time, as the angle of the upper chord member changes, the angle of the handrail also changes. Problems keeping the height of the pedals at a certain level

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