DISPOSIÇÃO CONSTRUTIVA APLICADA EM REDUTOR DE VÃO PARA PORTAS DE PLATAFORMA METROVIÁRIAS E FERROVIÁRIAS

Description

/ 6 “CONSTRUCTIVE ARRANGEMENT APPLIED IN A GAP REDUCER FOR METRO AND RAILWAY PLATFORM DOORS”. TECHNICAL FIELD

[001] This utility model patent application pertains to the railway infrastructure and public transport safety segment, specifically for use in doors in the gap between the train and the platform. It aims to reduce the gap between the platform and the trains circulating on the metro and rail network, preventing passengers from becoming trapped when the doors close. The device covers both platforms and trains. The structure is made of polyurethane, a low-density material with high resistance to lateral and axial loads. Its low weight allows for the correct functioning of platform doors, reducing the need for frequent maintenance. HISTORY OF THE TECHNIQUE

[002] Originally, many railway platforms were designed in a simple manner, without much attention to standardization of height and distance from trains. Each station was built independently, which led to considerable variations in platform height and distance to the train, creating the gap problem we know today.

[003] With the increased importance of accessibility, especially from the 1970s onwards, efforts began to standardize platform heights. In the United States, for example, the Americans with Disabilities Act (ADA) of 1990 spurred the adaptation of platforms for people with reduced mobility, wheelchair users, and the elderly. Other countries followed suit, establishing standards for platform height and width to facilitate safe boarding and disembarking.

[004] In recent decades, platform screen doors have become one of the major advances in safety at subway and train stations. These doors act as a Petition 870250038667, dated 05 / 13 / 2025, page 5 / 15 / 6 physical barrier between passengers and the railway line, opening only when the train is completely stopped and aligned. They are especially common in subway systems of large cities such as Tokyo, Paris, London and São Paulo. In addition to preventing falls, these doors reduce the risk of suicides and accidents caused by reckless approach to the edge of the platform.

[005] Many modern platforms now include sensors that detect the presence of people or objects near the edge, alerting when someone is in a danger zone. Another important evolution is the inclusion of specific areas on the platform for wheelchair users and people with special needs, with ramps or other adaptations that allow for easier boarding. These spaces ensure that passengers with limitations have greater safety when boarding and disembarking.

[006] These innovations are part of a global movement to transform train and metro platforms into safer, more accessible environments that are better integrated with the daily flow of passengers. State of the Art Analysis

[007] Research conducted in specialized databases revealed documents relating to protective devices applied in subway and train stations, such as document no. BR 102016011468-3, which deals with a “DEVICE APPLIED IN SUBWAY AND TRAIN STATIONS FOR PASSENGER PROTECTION”. The present object refers to a safety fence equipped with a system that, when activated, prevents passage into the subway and train track trench, preventing passengers from being injured or even risking death by falling, and when not activated, allows passengers to access the subway or train car without exposing themselves to the trench. Its structure allows the fence to be opened and closed horizontally or vertically, releasing and blocking passage.

[008] Document No. KR20240088241, which deals with a “DEVICE FOR FILLING GAPS IN VEHICLES AND PLATFORMS FOR URBAN RAILWAYS”, the present invention refers to a safety crossing plate device for Petition 870250038667, dated 05 / 13 / 2025, page 6 / 15 / 6 an urban railway freight train, comprising: a rotating transmission shaft installed on the floor of an electric train where an electric train door is located; a drive means to rotate the rotating transmission shaft; a first crossing plate connected to the rotating transmission shaft and capable of being rotated by the drive means and connecting the electric train door and a platform; a second crossing plate hinged to the first crossing plate and unfolded from the first crossing plate while being rotated by the drive means when the drive means is actuated; and a drive means control device to control the driving of the drive means.When installing a rolling container so that cargo can be loaded onto an electric train on an urban railway and used as a freight train, and smoothly transporting the rolling container from the electric train to the platform, a safety crossing plate is installed on the floor of the electric train door to supplement the gap between the electric train and the platform, thus allowing smooth movement when loading / unloading the cargo and preventing impact on the cargo.

[009] Document No. US2010224097A1 concerning a “SAFETY GAP FILLING FOR RAILWAY PLATFORMS”, the present invention provides a safety gap filler that is provided on an edge of a railway platform that is adjacent to the rails so as to minimize a gap between the platform and a train. The safety gap filler of the present invention includes a base body, which is fixed to the edge of the platform in a direction parallel to the rails, and support bars, which project in predetermined lengths from the surface of the base body towards the rails at positions spaced from each other at regular intervals. Each support bar is inclined at a predetermined angle relative to the base body in a direction in which the train travels, so that the support bars are elastically placed in sliding contact with the side wall of the train.

[010] Although the documents mentioned belong to the same field of activity, they do not have the same functionality and characteristics. The Petition 870250038667, dated 05 / 13 / 2025, page 7 / 15 / 6 devices currently used in the market have a high weight, which impairs the operation of platform doors and increases the need for frequent maintenance over time.

[011] Thus, it is a fact that the documents cited in the paragraphs above, despite belonging to the same field of application, do not present any of the characteristics of the object now improved, thus guaranteeing that it meets the legal requirements for patentability. BRIEF DESCRIPTION

[012] Taking into account all the problems that have been presented in the state of the art, the inventor, who has notorious knowledge of the sector, created and developed the aforementioned “CONSTRUCTIVE ARRANGEMENT APPLIED IN A GAP REDUCER FOR METRO AND RAILWAY PLATFORM DOORS”, which aims to reduce the gap between platform doors and trains circulating on the metro and railway network, preventing users from being trapped when the doors close, both platform doors and train doors.

[013] The objective of the present utility model is to present a gap reduction device, made of ether or ester polyurethane, with a hardness between 60 and 95 Shore A, with a density between 0.6 and 0.75 g / cm3. It has a low weight, allowing for the correct functioning of platform doors. In addition, it has a suitable profile to prevent passengers from being between the train door and the platform door.

[014] The present utility model takes into account not only the mechanical and functional qualities, but also the form, arrangement and strategic location of its parts and components which, correctly positioned, brought about an increase in efficiency without causing any burden to the users. DESCRIPTION OF THE FIGURES Petition 870250038667, dated 05 / 13 / 2025, page 8 / 15 / 6

[015] To complement the present description in order to obtain a better understanding of the characteristics of the present utility model and in accordance with a preferred practical embodiment thereof, a set of drawings is attached to the description, where, in an exemplary, though not limiting, manner, its operation is represented: Fig. 1 illustrates a previous image of the gap reducer for platform doors; Fig. 2 shows a top perspective view of the present device; Fig. 3 shows a top perspective view of the present component applied to the door; and Fig. 4 shows a top perspective view of the span reducer in use. DETAILED DESCRIPTION

[016] With reference to the illustrated drawings, the present utility model patent refers to “CONSTRUCTIVE ARRANGEMENT APPLIED IN A GAP REDUCER FOR METRO AND RAILWAY PLATFORM DOORS”, more precisely a gap reducer (1) for metro and railway platform doors (2).

[017] According to the present utility model, it is made of polyurethane ether or ester with a low density, fixed to the platform door (2), on the moving leaves, by means of screws. It has a rectangular base (6) with fixing holes (7), and housing extrusions (4) on its surface with rounded edges (5). It moves along with the door (2) during opening and closing. For the door closing mechanism (2) to detect the presence of an obstruction, whether a person or object, a normal force against the mechanism is required, generating between 8 and 12 kg of axial force, opposite to the movement of the door (2). When the mechanism detects an excessive load, the door (2) reopens, preventing the train (3) from starting. If the doors (2) Petition 870250038667, dated 05 / 13 / 2025, page 9 / 15 / 6 platform if they close first, the device (1) will prevent the user from remaining in the existing space between the train (3) and the platform door (2).

[018] Said element (1) may have varying dimensions, depending on the spacing found and types of platforms (2), since each station and platform has unique characteristics. Therefore, a specific study and dimensioning is necessary for each case.

[019] It is understood that when the present utility model is put into practice, modifications may be introduced with regard to certain details of construction and form, without this implying a departure from the fundamental principles that are clearly substantiated in the claims, it being understood that the terminology used was not intended to be limiting. Petition 870250038667, dated 05 / 13 / 2025, page 10 / 15

Claims

CLAIMS 1) “CONSTRUCTIVE ARRANGEMENT APPLIED IN SPAN REDUCER FOR "METRO AND RAILWAY PLATFORM DOORS", designs a gap reducer (1) for metro and railway train platform doors (2); characterized by having a rectangular base (6) with fixing holes (7), housing extrusions (4) on its surface with rounded edges (5), made of ether and ester polyurethane. Petition 870250038667, dated 05 / 13 / 2025, p. 11 / 15

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