GB2476493A - Safety moving gate for a station platform - Google Patents

Abstract

The gate is a safety barrier for train passengers which is vertically movable to allow access to train doors and comprises a vertical series of horizontally extending cables. The cables are attached to a series of longitudinally-spaced vertical loops of cables 1 which are moved by motors. The loops of cables 1 are kept in tension by adjustable bolts 5 retaining respective pulleys 4 at the lower ends of the cable loops.

Description

Safety Moving Gate The invention is a safety handrail to protect passenger and prevent accidents in train platforms.

The performance of this invention is based on putting a ring of lifting cable under tension to create a resistant column and provide the needed resistance for the safety guard. By turning the ring and its attached horizontal axis, handrail moves and passengers can cross.

Using static metal column and using gravity and static calculation to build conventional handrails as safety guards would close crossing section to the train. Those designs are based on single strong joint between surface and main static columns, to be able to resist against weight and force. Mentioned conventional designs are used as permanent handrails and modifying them to be moveable, decreases the resistance and performance of the handrail.

Mentioned limitations of the implementation of a reliable safety guard which can operate as a moving gate at the same time to enable passenger to get into the train, is the aim of this invention. Considering current limitations, this invention operate as a reliable safety moving guard with minimum distractive effect on existing platforms.

For the control purposes the safety guards will be connected to main control room or alternatively for train stations can be connected to two electronic eyes at two side of platform.

When the train enters to the platform, safety guards move up (figure 5) and when train stops, the doorways are clear. When train starts to move second electronic eye activates the guard and move handrails in place (figure 4).

In this design the calculations of resistance forces are based on two connection point, one with floor (figure 2) and another one with ceiling (figure 3). Ceiling can be common hard material ceiling like concrete or steel, shelters or alternatively any extension from existing columns. For the connection point to the platform surface we will use expanding bolts connected to a pulley that works as rail for main connection cables. The expanded bolt resists against enormous amount of force and will never fail the connection. An extension to the bolt is designed to adjust the elevation of the lower pulley to enforce the tension in the final system adjustment.

After installing surface and ceiling connections, the cable (1) sits on their pulleys and through adjusting the extension of expanded bolt, the main cable goes under tension force. The vertical cables are connected with horizontal cables which are the main safety guards. By turning the ceiling pulley (6) with an electromotor (7), the tensioned cable turns and the safety guard moves up and enables passengers to cross over The rotary element can be an electromotor or a connection to main rotary beam, Depending on existing elements on the platform or desired final design. Using one electromotor for each vertical column or using one for all of the columns, does not affect the performance of the system.

For the control purposes the safety guards will be connected to main control room or alternatively for train stations can be connected to two electronic eyes at two side of plafform.

When the train enters to the platform, safety guards move up and when train stops, the doorways are clear. When train starts to move second electronic eye activates the guard.

Figure 1 shows a conventional train plafform without safety moving gate.

Figure 2 shows a cross section of floor connection which is a expanding bolt (5) in concrete (2), connected to lower pulley (4) to hold the lifting cable (1) and through adjusting the elevation of pulley force the tension on the cable.

Figure 3 shows a cross section of ceiling (3) connection which contains a base plate to connect upper pulley (6) and electromotor (7).

Figure 4 shows an installed safety moving gate in the platform. In this figure horizontal cables are in lower position and protecting passenger and the gate is closed.

Figure 5 shows the position of the gate when train has stopped in the plafform and the gate is open to enable passengers to get into the train.

Claims (6)

1. Claims 1. Safety moving gate mechanism contains vertical steel lifting cables and horizontal guards are under tension resistant cables.
2. 2. The tensioned ring of lifting cable (1) performs as a strong column to provide resistance.
3. 3. The horizontal axis would be tensioned though vertical main columns.
4. 4. Lower pulley in each vertical column is combination of an expanding bolt and adjustable pulley to create the desirable tension.
5. 5. Ceiling connection contains a joint plate, connected to the pulley and an electromotor to turn the pulley and as the result the cable ring to enable the system to perform as a moving gate.
6. 6. Laser eyes are control tools for the system and they release order to electricity control system. They will detect train entry or exit to the platform. This part also can be replaced with user control systems.