FR2754552A1 - Motorised gantry to restrict vehicle entry by height with adjustable bar - Google Patents

Abstract

The gantry has two columns (A1, A2) joined by an upper cross bar (D), an adjustable bar (C) which can move vertically, supported by two chains (J1, J2) which pass around a shaft (1) which turns in bearings (2) attached to the cross bar driven by toothed gears (3). The gantry is assembled on two base blocks (B1, B2). The adjustable bar is attached to counterweights (E1, E2) heavier than the bar, by the chains. The motor (M) controls the movement of the bar and the counterweights by the chains which are attached to bearings at the base (G/H1, G/H2). This prevents the bar being raised other than by using the motor. The controls are contained in a locked housing (F). There is a hinged shutter (L) held in position by an electromagnetic suction pad (K) which allows access to the control lever in a power cut.

Description

PREAMBLE
The presence of different types of vehicles that can access industrial or commercial sites has made site managers obliged to select these vehicles according to their sizes.

To this end, we have seen the installation of "Gantries" intended to limit the heights of vehicles that can access these sites and reserve access to light vehicles.

These gantries are mostly fixed level and limit the passage heights to 2.10 meters;
This limitation does not comply with the requirements of the emergency services which require, with good reason, that these gantry cranes absolutely do not limit their access in case of necessity.

The present invention describes a system capable of adjusting the heights of access on demand and of allowing emergency services to access at all times, without any restriction, even when the gantries are no longer supplied with electric current.

In this case, the device described below allows them immediate access, without recourse to any system or material external to the device.
During their interventions, the mobile beam contained in the gantry, may, under the effect of the counterweights contained in the system, go up immediately to the most e'1..evé level to let the vehicles pass the Heavy goods vehicle gauge.

 It also has the advantage of being able to be installed without interrupting traffic, its mounting being carried out on two foundation blocks, external to the track to be equipped.

 I1 therefore does not require any excavation or c-lacution of rainwater, all of its elements being 'when ground.

The present invention relates to a gantry system comprising a horizontal beam which can be moved vertically between two posts.

This gantry is characterized by original solutions making it possible to simultaneously fulfill different functions and to present installation facilities.

It mainly consists of BOARD I / III by a mechanically welded assembly comprising two vertical posts (A 1) and (A 2) Semi-detached and parallel, resting on two foundation blocks (B 1) and (B2) in reinforced concrete, arranged on either side of the track to be equipped.

These blocks (B 1) and (B2) are sufficiently dimensioned, according to the nature of the grounds in which they are poured "in situ", in formwork designed for this purpose.

Between the two vertical posts (Al) and (A2) can slide a horizontal beam (C)
These two posts (Al) and (A2) are also intended to take up the horizontal forces to which the beam could be subjected in the event of frontal impacts caused by vehicles.

This beam (C) PLANK 11/111 in commercial steel is sized to resist vandalism.

It is filled with concrete, poured around a steel frame, so as to make it rigid, heavy and difficult to cut by unprofessional means.

A crosspiece (D) located in the upper part connects the two posts (Al) and (M) and contains a suspension assembly of the beam (C) consisting of a shaft (1) supported by bearings (2) fixed on the crosspiece (D)
This shaft (1) of sufficient length and section composes at its two ends, two toothed sprockets (3) supporting each of the chains (J1) and (J2) connected, on the one hand, and at c, at each end, to the above the beam (C) and on the other hand to two counterweights (E1) and (E2) situated inside the posts (Al) and (A2) and being able freely: to slide r inside these posts.

These counterweights (El) and (E2) are heavier than the beam (C);
Under the effect of their action, the beam (C) is required to go up in the upper part of the gantry.

The chains (J1) and (J2) pass through the counterweights, (El) and (E2) to which they are fixed by suitable fasteners and descend to the lower bearing and toothed pinion systems (G / H 1) and ( G / H 2) then they go back up to come and fix themselves under the beam (C)
The beam (C) is controlled by the chains (J1) and (J2) whose movements are symmetrical and synchronous by means of the shaft (2) and the toothed sprockets (3)
Therefore, this particular assembly of chains (J1) and (J2) neutralizes any attempt to raise the beam (C)
In the lower part of the post (A2) BOARD IIHII, a box (F) contains on the one hand: 1 "A motorization assembly (M) driving the chain (J2) via the toothed pinion (G / H 2 )
This motorization assembly comprises a reversible reduction motor, capable of the movements of the beam (C) and of the abnormal forces consecutive to sabotage or malicious attempts, powered by an electric current source and is equipped with a brake system. lack of current;
In the absence of electric current, the gear motor is blocked and keeps the beam in the position where it is 2 ". On the other hand, an electrical control and system control box.

The reinforced box (F) is closed with security keys.

A fire brigade rescue device is arranged on one side of the box (F);
It consists of an articulated flap (L) held in place by a high power electromagnetic lock (K).

As long as the gantry is supplied with electrical power, the electromagnetic lock (K) is supplied and keeps the shutter (L) closed.

During a power failure, it is possible to move the flap (L) and access the brake release lever (N) of the reversible gear motor which can then rotate freely.

Under the action of the counterweights (El) and (E2) the beam (C) automatically rises in the upper part of the gantry to free the passage of vehicles to the Heavy goods vehicle gauge

Claims (2)

 motor reducer brake.  (K) can give, in the event of a lack of current, access to the lever (N) for controlling the  consisting of an articulated flap (L) held in place by an electromagnetic suction cup  in the box (7) under security key and including a firefighters rescue device  (C) by means other than motorization. The control set being contained  on the lower bearings (G / H / 1) and (G / H / 2) which prevents lifting of the beam  and counterweight (El) and (E2) via the chains (J1) and (J2) which are looped  equipped with a lack of current brake allows the mobilization of the poutrc assembly (C)  beam. A motorization (M) consisting of a reversible electric reduction motor  is connected by chains (J1) and (J2) to the counterweights (El) and (E2) heavier than the  require equipment or digging the track itself. The mobile beam (C)  foundation (B1) and (B2) arranged on each side of the track to be protected, without  e-ltra ^ mated by toothed gables (3). This set being placed on two blocks of  a shaft (1) rotating in bearings (2) fixed on the upper crosspiece (D) and  (C) movable vertically and supported by two chains (I) and (J2) supported by  and (A2) twinned, linked together by an upper crosspiece (D), a horizontal beam  Motorized gantry, characterized in that it comprises, in a set of posts (Ai)  Claims 2 motorized gantry, according to claim -1- characterized in that the two posts (Al) and  (A2) are paired; 3 Motorized gantry, according to revepdication -1- characterized in that the counterweights (El) and  (E2) are heavier than the beam (C) and tend to raise it 4 Gantry. motorized, according to claim -1- characterized in that the beam (C) is  filled with concrete poured around a reinforcement 5 Motorized gantry, according to claim -l-Characterized in that the chains (J1) and (J14  are buckled on the toothed gears (3) and t G / H 1) and G / H 2) to prevent  lifting of the beam (C) 6 Motorized gantry, according to claim -1- characterized in that the control of  rescue consists of an articulated flap (L) held in place by a suction cup  electromagnetic (1Ç) which controls the brake release lever (N) of the  Reversible gearmotor (M)