Equipment for ejection doors for railway and tramway vehicles

Abstract: Equipment for ejection doors for railway and tramway vehicles, composed of a motion transmission and ejection control assembly (1), a wing translation, drive and support assembly (3), wherein: the assembly (1) is composed of a motor means (7) transmitting the motion to two conjugate belts (9), two wing-dragging slides (13), integral with the belts (9) and supported by ball guides (15), two brackets (17) to connect wings-slide-track, engaged with the wing-dragging slides (13) and with the sliding tracks (19), rectilinear for a section and then inwardly arc-bent; the assembly (3) is composed of a wing-supporting guide (27) with bearings (29), a pantograph (31) connecting wing and support, a fixed guide (33) connected to the assembly (1), a wing-driving arm (35) connected to a sliding support (37) realizing, through a torsion spring (39), a first, manual, spreading-apart stroke of the wings (5), in case of emergency.

Description: The present invention refers to an equipment operating ejection doors for railway and tramway vehicles. Systems are known to be currently used on railway and tramway coaches and/or vehicles, to open and close their doors. These systems are essentially based on rotation devices, and sometimes on ejection devices with a subsequent translation. In the first systems, the basic problem was the overall dimensions, or the space required by the door movement to be opened and closed, that is usually very high. In ejection systems with subsequent translation, the overall dimensions are greatly reduced with respect to the above-mentioned rotation systems, but the complexity of these controls remains. FR-A-2 094 969, which is the closest prior art, discloses a sliding door with pivoting supports. Purpose of the present invention is realizing a door opening and closing system for railway and tramway vehicles of the above-mentioned type with ejection and translation, simple and reliable, that allows easy operation of the doors themselves, guaranteeing at the same time minimum overall dimensions required for their opening and closing. The equipment operating ejection doors for railway and tramway vehicles being considered is that disclosed in Claim 1. The invention will now be described in detail with particular reference to the enclosed drawings, provided as a non-limiting example, in which: figure 1 is a schematic view of the equipment composition; figure 2 is a perspective view showing the motion transmission and ejection control assembly with electric control; figure 3 is a schematic top view of the wing, bracket, sliding track assembly; figure 4 is a schematic side view, partially sectioned, of the motion transmission and ejection control assembly in figure 2; figure 5 is a perspective view showing the motion transmission and ejection control assembly with pneumatic control; figure 6 is a perspective view showing the wing translation, releasing and support assembly; figure 7 is an exploded schematic view, from the top, showing the wing translation, releasing and support assembly and the motion transmission and ejection control assembly; figure 8 is a schematic side view, partially sectioned, of the wing translation, releasing and support assembly in figure 6, connected to the motion transmission and ejection control assembly in figure 4. Referring to the figures, the equipment operating ejection doors for railway and tramway vehicles being considered comprises: a motion transmission and ejection control assembly 1, at least two wings 5, where each one of the wings 5 is associated with a track providing a slideway 19, and a wing translation, releasing and support assembly 3. The motion transmission and ejection control assembly 1 is substantially composed of a motor means 7 that transmits through respective toothed driving wheels 11 opposed conjugate motion to two aligned endless toothed belts 9. The motion transmission and ejection control assembly 1 further comprises, for each one of the wings 5, a wing-drawing slide 13, integrally attached to one of the two endless belts 9 and linearly slidably supported along a ball guide 15; and a bracket 17 interconnecting wing 5, slide 13 and track 19. The bracket 17 is fixedly attached to the corresponding wing 5 and is laterally slidably engaged, at an upper portion, with the corresponding wing-drawing slide 13 to move longitudinally therewith and is also slidably engaged, at a lower portion, to slide longitudinally in the slideway of the respective track 19; these tracks 19 are provided in fixed shelf-like elements 21 so as to be rectilinear along a section corresponding to a longitudinal stroke of each wing 5, and then inwardly curved at an inner extremity thereof so as to induce a transverse, respectively ejection or closure, stroke of the wing 5. In figure 2, the motor means of the assembly 1 is composed of an electric motor 7; in figure 5, said motor means is composed of a cylinder 23 with fluid pressure, in particular of a pneumatic cylinder. The brackets 17 connecting wings 5, slides 13 and tracks 19 are equipped at their free ends with rolling bearings 25 suitable to be engaged to the track 19 in the shelf 21 and in the seat of the wing-drawing slide 13. The wing translation, releasing and support assembly 3 is substantially composed of: a wing-supporting guide 27 slidably supported via a linear ball bearing 29 on a fixed guide 33 attached to the motion transmission and ejection control assembly 1; a pantograph system 31 (involving at least two arms 31 per wing 5) pivotally connecting the wing to the wing-supporting guide; a pivotally mounted releasing arm 35 linked to a sliding support 37 provided on the wing 5 so as to guide the wing 5 during its translation and applying, by means of a torsion spring 39, a release stroke for initially spreading the wings 5 apart, which stroke permits insertion of hands between the wings to facilitate their opening in case of emergency; and an adjusting screw 41, for positioning the wing translation, releasing and support assembly 3 with respect to a fixed vehicle framework 45 by adjusting the longitudinal sliding of the assembly 3 during the final closure stage. Reference number 43 shows the rolling bearings provided at the end of the releasing arm 35. The edge 45 of the fixed framework is the one with respect to which the wings 5 move, during their ejection or closure. The torsion spring 39 is wound around a column 47, running vertically and shown interrupted downwards: hinging of the wings 5 in their lower part is a mirror image of the above-described hinging with releasing arm 35, sliding support 37 and torsion spring 39 placed on the lower side and connected to the lower end, not shown, of the column 47. The wings 5 comprise a frame of light-alloy extruded members, panelled with two sheets made of materials such as aluminium or the like, with the internal volumes filled with a honey-comb structure made of the same materials. Gaskets are housed on the perimeter of wings and framework edges, guaranteeing their seal when the doors are closed; some cuff gaskets, also working as "sensible edge", being housed along the vertical edges of the wings; said gaskets being made of self-extinguishing materials, complying with the safety standards related to fires in railway rolling stock.

Claims: Equipment operating ejection doors for railway and tramway vehicles, comprising: a motion transmission and ejection control assembly (1), at least two wings (5), each one of said wings (5) being associated with a track providing a slideway (19), and a wing translation, releasing and support assembly (3); characterized in that the motion transmission and ejection control assembly (1) is composed of: a motor means (7) that transmits through respective toothed driving wheels (11) opposed conjugate motion to two aligned endless toothed belts (9); and for each one of said wings (5), a wing-drawing slide (13), integrally attached to one of the two endless belts (9) and linearly slidably supported along a ball guide (15), and a bracket (17) interconnecting said wing (5), slide (13) and track (19), one bracket being fixedly attached to each wing, being laterally slidably engaged, at an upper portion, with the corresponding wing-drawing slide (13) to move longitudinally therewith and also being slidably engaged, at a lower portion, to slide longitudinally in the slideway of the respective track (19); said tracks (19) being provided in fixed shelf-like elements (21) so as to be rectilinear along a section corresponding to a longitudinal stroke of each wing (5), and then inwardly curved at an inner extremity thereof so as to induce a transverse, respectively ejection or closure, stroke of the wing; in that the wing translation, releasing and support assembly (3) is composed of: a wing-supporting guide (27) slidably supported via a linear ball bearing (29) on a fixed guide (33) attached to the motion transmission and ejection control assembly (1); a pantograph system (31) involving at least two arms (31) per wing and pivotally connecting the wing to the wing-supporting guide; a pivotally mounted releasing arm (35) linked to a sliding support (37) provided on the wing (5) so as to guide the wing (5) during its translation and applying, by means of a torsion spring (39), a release stroke for initially spreading the wings (5) apart, which stroke permits insertion of hands between the wings to facilitate their opening in case of emergency; and an adjusting screw (41) for positioning the wing translation, releasing and support assembly (3) with respect to a fixed vehicle framework (45) by adjusting the longitudinal sliding of said assembly (3) during the final closure stage; and in that the wings (5) comprise a frame of light-alloy extruded members, panelled with two sheets made of material such as aluminium, the internal volumes being filled with a honey-comb structure made of the same material. Equipment operating ejection doors for railway and tramway vehicles according to claim 1, characterized in that the motor means (7) of the motion transmission and ejection control assembly (1) is composed of an electric motor with direct current power. Equipment operating ejection doors for railway and tramway vehicles according to claim 1, characterized in that the motor means (7) of the motion transmission and ejection control assembly (1) is composed of a cylinder (23) with fluid pressure, generally a pneumatic cylinder. Equipment operating ejection doors for railway and tramway vehicles according to any one of the previous claims, characterized in that the hinging of the wings (5) in their lower part is a mirror image of the hinging of the column (47) with the wing-driving arm (35) and the sliding support (37) provided in the wing translation, releasing and support assembly (3); around said column (47) being provided also in its lower part a torsion spring (39) suitable to allow with the torsion spring (39) provided in the upper part, a first spreading-apart stroke of the wings (5), stroke allowing the insertion of hands between the wings to facilite their opening in case of emergency. Equipment operating ejection doors for railway and tramway vehicles according to any one of the previous claims, characterized in that gaskets are housed on the perimeter of the wings (5) and the framework edges (45), guaranteeing their seal when the doors are closed; some cuff gaskets, also working as "sensible edge", being housed along the vertical edges of the wings; said gaskets being made of self-extinguishing materials, complying with the safety standards related to fires in railway rolling stock.

Inventors: LOSITO PIETRO, LOSITO, PIETRO
Applicants: OCLAP SRL, O.C.L.A.P. S.R.L.
Application year: 1992
Main classification: E05F15
IPC codes: B60J5, E05D15, B61D19, E05F15