FR2522036A1 - Barrier for car park - comprises retractable teeth which only allow vehicles to pass in one direction - Google Patents

Abstract

The retractable barrier for preventing vehicles for travelling in a particular direction in a car park comprises an axis carrying a series of teeth which rotates inside a concrete channel formed in the ground. Each tooth consists of a massive lower part acting as a counterweight which causes the pointed upper part to normally project from the channel. Vehicles approaching in one direction cause the teeth to be safely depressed into the channel, allowing the vehicle to pass, whereas vehicles approaching from the other direction cannot depress the teeth, preventing passage of the vehicle.

Description

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The present invention relates to the protection system for entry or exit lanes for all pneumatic vehicles. This protection system can be placed at the entrances or exits of public car parks, petrol stations, toll lanes of all kinds, etc.

Dan. known protection devices for entry or exit routes for all pneumatic vehicles, existing systems operate manually, electrically or electronically, therefore most often using energy or the hand of man. Most often the systems used are of the type of barriers which are raised automatically either by introducing a coin or a punch card or by means of an electronic eye. There are other systems such as for example barriers placed on each side of the track where the vehicle is engaged. These barriers open laterally when the vehicle is moving or entering the protected space.

These protection systems can be fallible in certain cases such as for example in the case where the vehicle is moving at high speed over the barrier and comes to hit hard with this last, certainly the vehicle after having crossed by force the barrier will present damage of body and ice but may also escape under these conditions.

The principle of the retractable harrow according to the invention makes it possible to avoid these drawbacks. Indeed, when a pneumatic vehicle has crossed the retractable harrow it will not be able to turn around) the retractable harrow works mechanically and can be installed or disassembled easily, it suffices only to install it on a corresponding pit aus.mesures de the plate which takes the place of support b the retractable harrow. A cast iron plate corresponding to the measurements of the plate which supports the harrow can occasionally reopen the pit when the retractable harrow is not to be used.

A water drainage system will be installed at the bottom of the pit - connected to the nearest sewer - so as to avoid malfunction or deterioration of the retractable harrow.

The principle of the retractable harrow is as follows t
According to a first variant, the means used for the harrow to retract is the counterweight system. A movable steel plate protruding from the ground composed of a flat part and a perforating upper part is kept inclined by means of the counterweight so that if a pneumatic vehicle comes to touch the flat part, the perforating plate will tilt to give way to the vehicle and return to its original position when the vehicle wheels no longer land on the harrow.

In a second variant, the counterweights are replaced by a return spring which will be fixed on each perforating plate on the one hand and at the bottom of the pit on the other hand.

According to a third variant, for the retractable harrow, a single perforating plate provided with the counterweight or spring system can be used.

It then suffices to trace using cement terminals or using metal rails fixed to the ground a path that must necessarily follow the vehicle in order to roll on the perforating plate.

The appended drawing represents the retractable harrow under the various cuts provided with the counterweight device.

As shown, the device includes a support (2) A-52 which holds and protects the assembly. Under the support is fixed a transverse axis (6)% 28 15 -A-52.

The mobile system of the perforating plates (1) A-52 which rests on the axis comprises counterweights (4) A-52 of the bearings (3) A-52. The transverse axis is placed in bearings (5) 52. There is a pin (7) of type 1 # 6 x 45 XC38 and finally to finish, at the bottom of the pit there is a conduit or two connected to the sewer to evacuate the water.

The device, object of the invention, can be used in all cases where it is desired to protect the place where all the pneumatic vehicles can exit or enter without authorization at the control or toll or as a safety measure. It can be used in public car parks, airports, self service stations, all places where an inflatable vehicle must pass under control, border posts etc.

Claims (3)

1 - Retractable harrow (fixed on a cement pit) composed of an axis fixed on a support comprising perforating plates which are fixed on the mobile axis. The lower part of the perforating plates is located under the support, the upper part comprises a flat surface terminated by a perforating point. Characterized by the fact that it includes a means of tilting the perforating plate or plates or of preventing it from tilting to allow a pneumatic vehicle to pass or to pass. 2 - retractable harrow according to claim 1 characterized in that the means for tilting or pocketing to tilt the perforating plate is a counterweight fixed on the inner part of the perforating plate. 3 - retractable harrow according to claim 1 characterized in that the means for tilting or preventing tilting the perforating plate is a return spring fixed to the bottom of the pit and on the lower part of the perforating plate.