RU45350U1 - SWIVEL AND EXTENSION STAIR OF THE FREIGHT WAGON - Google Patents

Abstract

The utility model relates to the equipment of railway freight cars, namely to the designs of the stairs of the car doors. The swing-out ladder consists of two sidewalls 1, interconnected by several steps 2. On the upper part of each of the sidewalls 1, the upper stop element 3 is strengthened, and on the lower part - the stop element 4, designed to fix the stairs in the working position and transport positions, respectively . A handle 5 in the form of a bracket is attached to the lower step of the ladder. To fix the stairs in the working or transport positions (Figs. 1, 3), brackets 7 with cushions 8 are mounted on the frame 6 of the car from the outside of the sidewalls 1. To limit the vertical movement of the stairs in the transport position on the frame 6 of the car, a stop 9 installed with the possibility of interaction with the middle part of step 2.

Description

The utility model relates to the equipment of railway freight cars, namely to the designs of the stairs of the car doors.

In the prior art, a swing-out ladder is known comprising a ladder pivotally mounted on a guide platform with rollers, mounted on a guide platform articulated with a ladder, and stops for a movable frame (see ed. St. USSR No. 645881, IPC B 61 D 3/00, 1976).

A disadvantage of the known solution is the design complexity due to the presence of clamps and five rollers that are subject to wear during operation of the ladder as a whole.

The closest to the proposed utility model for the combination of essential features is a retractable vehicle ladder containing two sidewalls interconnected by steps, thrust elements of the upper ends of the sidewalls for fixing the working position of the ladder (see ed. St. USSR No. 1154129, IPC B 61R 3 / 02, 1985).

The disadvantages of this technical solution are the complexity of the design due to the presence of a large number of constituent elements, which complicates the design, increases its weight and, forming additional friction surfaces, reduces the durability of the work.

The technical result when using the proposed utility model is to simplify the design of the stairs and increase the service life.

The specified result is achieved by the fact that the swing-out ladder of a freight car, containing two sidewalls connected between

by steps, thrust elements of the upper ends of the sidewalls for fixing the working position of the stairs, further comprises thrust elements of the lower ends of the sidewalls for fixing the transport position of the stairs and a handle in the form of a bracket attached to the lower step, and a limiter for the vertical movement of the stairs located with the possibility of interaction with the middle part steps, while on the carriage frame brackets are mounted with cantilevers fixed to them by rollers mounted with the possibility of interaction or with emphasis ny elements of the upper ends of the sidewalls, or with resistant elements of the lower ends of the sidewalls.

The utility model is illustrated by drawings.

In Fig.1 shows a swivel-ladder, General view;

figure 2 - a view of figure 1;

figure 3 shows the staircase in the transport position.

The swing-out ladder (Figs. 1, 2) consists of two sidewalls 1, interconnected by several steps 2. On the upper part of each of the sidewalls 1, the upper stop element 3 is strengthened, and on the lower part there is a stop element 4 designed to fix the stairs respectively, in the working position (the ladder is lowered, FIG. 1) and in the transport position (the ladder is raised, FIG. 3). In the working position, the lower part of the ladder goes beyond the design outline of the car’s overall dimensions (line “B”, Fig. 1). A handle 5 in the form of a bracket is attached to the lower step of the ladder. To fix the stairs in the working or transport positions (Figs. 1, 3), brackets 7 are mounted on the frame 6 of the car from the outside of the sidewalls 1 with cushions 8 mounted cantileverly mounted on them and installed either with the upper stop element 3 or with the lower stop element 4. The location of the rollers 7 relative to the frame 6 of the car provides the necessary for ease of use the angle of inclination of the stairs to the vertical.

To limit the vertical movement of the stairs during the movement of the car (in the transport position), a limiter 9 is mounted on the car frame 6, which is installed with the possibility of interaction with the middle part of the step 2.

A swing-out ladder of a freight car works as follows.

To transfer the stairs to the transport position, turn the stairs through the handle 5 relative to the rollers 8 and move under the frame 6 of the car. In this case, the thrust element 4, interacting with the roller 8, fixes the ladder in the transport position.

In the transport position, the step 2 is affected by the horizontal and vertical inertial forces applied to the center of gravity of the ladder, while the center of gravity of the ladder is located so that the horizontal component of the reaction force exceeds the horizontal inertial force, which prevents the ladder from moving under the frame of the car under the action of the horizontal inertial strength.

To transfer the ladder from the transport position to the working position, the ladder is extended using the handle 5 until the contact of the thrust element 3 with the roller 7 and turning the ladder relative to the roller 7 lower it down. In this case, the staircase with the lower part of the thrust elements 3 rests on the roller 7, and the upper part contacts the carriage frame 6 and thereby fixes the staircase in the working position.

Claims (1)

A swing-out ladder of a freight car, comprising two sidewalls interconnected by steps, thrust elements of the upper ends of the sidewalls for fixing the working position of the ladder, characterized in that it further comprises thrust elements of the lower ends of the sidewalls for fixing the conveyor position of the ladder and a handle in the form of a bracket, attached to the lower step, and a limiter for the vertical movement of the stairs, located with the possibility of interaction with the middle part of the step, while strengthening on the frame of the car Lena brackets with cantilevers mounted on them rollers mounted with the possibility of interaction with either the thrust elements of the upper ends of the sidewalls, or with the thrust elements of the lower ends of the sidewalls.