SU1371935A1 - Vehicle retractable stairway - Google Patents

Abstract

The invention relates to the field of engineering and can be used on vehicles to provide access to service and control platforms, as well as to the salon. The aim of the invention is to improve the usability and improve the layout on the vehicle. For this, the mounting device fixed on the viewing platform is made in the form of a U-shaped guide, forming a duct, inside of which a retaining element and a ladder are hingedly articulated. In this case, the retaining element consists of three plates connected to each other by means of an axis, forming a vertical hinge. The ladder is connected to the middle plate, and the outer plates are connected at the end by a transverse bar, which in turn interacts with the stops in the guide and two stoppers limiting the movement of the retaining element in the rail. At the free end of the ramp, a V-shaped support element is pivotally fixed, which in the working position of the ramp rests on the ground and thereby stabilizes the ramp from swinging and also provides for its inclined placement, which is convenient for the user. Due to the vertical swivel of the plates of the holding member, the ladder can be easily rotated to the desired position, which provides access to the viewing platform from any direction. 1 hp f-ly, 3 ill. S (L: o: o: ate

Description

The invention relates to mechanical engineering and can be used on vehicles to provide access to service and control platforms, as well as to the salon.

The aim of the invention is to improve ease of operation and improve the layout of the vehicle.

Figure 1 shows the proposed ladder, in the transport position, a general view; figure 2 - stairs with extended ladder, General view; Fig. 3 shows a layout of the retractable ladder on the vehicle (ladder in the working position).

The cleaning ladder contains a platform 1 fixed horizontally on the vehicle or tiltable to a horizontal position to provide maintenance and repair (for example, a power plant), and a U-shaped guide 2 forming a duct open with a platform 1 one of the ends of the platform I. Inside the box there is a retaining element 3, consisting of three plates housed over d: mounted and 4 plates 5 and 6 connected by a vertical hinge. The outer plates 5 are fastened along the end with with the power of the transverse bar 7, and the inner plate 6 is pivotally connected by means of a horizontal axis 8 to a ladder 9 formed by two sidewalls 10 and transverse steps 11 and 12. At the free end of the ladder 9 a V-shaped support element 14 is pivotally fixed by means of the horizontal axis 13, which can also be performed with additional steps. To limit the retaining element 3 in the guide 2, the latter is made with an emphasis 15 and stoppers 16, with the first of which the transverse bar 7 of the retaining element 3 interacts in the transport one and with the second in the working position of the device.

The device works as follows.

For maintenance or repair of the vehicle, the platform 1 is folded back to the horizontal position and, after the step 12, the ladder 9 is extended from the guide 2 to the stop of the cross bar 7

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the retaining element 3 in the stoppers 16. After that, the ladder 9 is turned around the vertical hinge 4, the supporting element 14 is folded back and, having chosen a place free of foreign objects, the ladder 9 is tilted down. At the same time, the free end of the element 14, resting in the ground, reliably stabilizes the ladder 9 in an inclined position, convenient for use, and prevents its swinging.

Cleaning the ladder 9 to guide 2 upon completion of maintenance is performed in the reverse sequence. In this case, the stop 15, interacting with the bar 7, ensures the retention of the ladder 9 in the transport position. Platform 1 after cleaning the ladder 9 also returns to its original position.

Claims (2)

1.The vehicle's ladder that contains a mounting device, including a supporting platform mounted on the vehicle and a U-shaped guide installed in the plane of the platform and forming with it a duct with a hole on the platform side, and an articulated device formed from two sides and cross ramps connected by a horizontal hinge with a holding element and mounted with the possibility of reciprocating relative to the installation device and stopper movement of the ladder, characterized in that, in order to improve ease of operation and improve the layout on the vehicle, the retaining element is formed by three plates placed one above the other and connected by a vertical hinge, while the outer plates are fastened along the end by a transverse bar having protrusions for limiting the stroke in the guide, and the middle plate is hingedly connected with a ladder. 2. A wedge-down ladder according to claim 1, characterized in that it is provided with a V-shaped element for supporting it on the ground, hinged on the free end of the ladder. 1 / 73 G2 g-- 14 Srig.G. l FIG.