FR2714404A1 - Lightweight bar for deploying row of spikes across road - Google Patents

Abstract

The apparatus consists of spikes (8) on a bar which can be deployed across a road to puncture the tyres of a vehicle passing over it. The bar is in the form of a series of links (7) attached to a flexible belt (9) which can be unrolled by a motor (3) rotating a screw (4) in a nut (5). In variants, the bar can be a lever mechanism or a flat housing with rotatable spikes, and the drive mechanism can incorporate gears, endless screws, racks, cams, cylinders, cables, belts or chains.

Description

The present invention relates to a complete or even partial device or assembly for placing the roadblock harrow of the gendarmerie by mechanical means.

Currently, this harrow is manually pulled by a gendarme. The latter being exposed to danger of death, because of probable shooters, must wear a bulletproof vest for his protection.

The apparatus according to the invention having a remote triggering system avoids this major drawback.

The device according to the invention can be integrated or as an accessory to the box containing the harrow, indeed has as a first characteristic a motor assembly driving a screw or a nut to push the nail holder supports to block a traffic route. These supports are currently nail holder plates or a form of lever braces expandable or fixed in a threshold predisposed by interlocking elements. In some cases the device can be used to remove the harrow. This device can actuate the harrow on its entirety or be stored therein for a partial drive of its length. It makes it possible to place a harrow from its box or to be stored or fixed to it at any point of its open or closed length.

One or more sets of screws and nuts can be replaced by levers, gears, worms, eccentrics, racks, cylinders, cables, belts or various chains.

The autonomy of the device is ensured by an electric battery or any other accumulator. A chable or pipe of a certain length ensures the triggering of the device by a remote switch.

According to particular embodiments, the energy source can also be made by counterweight, springs or by thermal, pneumatic or hydraulic tripping force.

The device can also include a launch lever system.

Figure 1 shows the device according to the invention applied to a set of wound harrows.

Figure 2,3,4,5 shows the device according to the invention in its initial form or derivatives applied to pull or push a harrow with extendable braces lever.

FIG. 6 represents a derivative of the invention applied to a set of harrows in the form of a soft threshold.

 Referring to Figure I, shows the set of coiled harrows (2).

 It is composed of several nail-holding plates (7) pulled by a belt (9) or by cables. The soft pads (7) are formed to be torn off after entering a car tire. A box (I) containing the harrow composed of the nail-holding plates (7) together on a belt (9) and wound (2). A motor (3) drives a screw (4) and actuates a nut (5) anchored the belt (9) to exert a traction force on the plates (7), these are pressed against the support (6), straightened , and therefore unrolled across the road.

A launch lever (10) can facilitate the unwinding. It is possible to replace the motor, screw and nut with a pneumatic cylinder receiving its energy from a pressure accumulator.

FIG. 2 shows the device of the invention in application with a harrow with extendable cross braces (II). The motor (3) pushes or pulls by its screw (4) the nut (5), fixed to an indirect spider or by intermediate elements by exerting a force to push the harrow across the road. FIG. 3 represents the device of the invention for the extraction of a harrow with extendable cross braces (11) with two or more nuts. Launching or support systems (10) can be provided to facilitate positioning of the harrow.

Figure 4 shows a derivative of the invention. A motor (3) driving a lever (12) direct or intermediate extendable braces to push or position the harrow across the road.

Figure 5 shows a derivative of the invention for placing a harrow by mechanical means designed for a harrow with extendable braces, a piston (14) in a simple or telescopic cylinder (13) attached to any lever of the harrow (11 ) pulls or pushes it to block the road.

The source of energy can be a container (15) under pressure or vaccine prior or designed on site. The triggering by a valve (16) can be direct manual, electric, pneumatic, hydraulic or other means and remotely.

This derivative also makes it possible to remove the harrow. FIG. 6 shows the device of the invention for blocking a road by mechanical means by a set of harrows in the form of a soft sill (17) predisposed as embotable elements on the road. A motor (3) drives, by an eccentric system, (18) the connecting rod (19) and a lever (20) fixed to the nail-holding shaft (21). The soft (22) at rest protected by the threshold can be held on the shaft (21) so as to replace them. It is possible to provide a notch (23) to allow tearing them off after being planted in a car tire.

Reference 27 of Table 1/4, shows forms of soft fixed or with possible mobility.

The possibility of equipping the soft ones with an explosive charge to burst solid tires is not excluded. A retractable red warning light (24), for example, is recommended. The possibility of actuating the button (26) of the remote control (25) by wire or wave puts the service personnel out of danger.

The device according to the invention is particularly intended for the gendarmerie to block the roads in the event of a hit and run.

Claims (4)

RF-VENDlCATlON  1) The light, mobile and portable device with hDm-ne arms for placing the harrows of roadblocks by mechanical means, characterized in that it comprises an element designed to unwind, unfold, raise or push a dam harrow road.  2) The apparatus according to claim 1, characterized in that the action element can be one or more sets of screws and nuts, single or compound lever, gear, worm, racks, eccentrics, cylinders, targets, belts or various chains.  3) The apparatus according to claim 2, characterized in that the source of force for the drive may be electric, by counterweight, by springs, thermal, p.neumatic or hydraulic.  4) The apparatus according to claim 1, any of claims of I to 3, characterized in that the remote triggering is done with or without wire.