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Title:
SAFETY FENCE OF PILLAR ELEMENTS OF A BUILDING
Document Type and Number:
WIPO Patent Application WO/2014/009792
Kind Code:
A1
Abstract:
The present invention relates to a safety fence of pillar elements of a building comprising a fender beam attached to at least two rotor arrangements for absorbing energy, fixed to the side walls of pillar, in which by means of racks and toothed wheels kinetic energy rotor accumulators (11, 12, 13) are driven, causing a conversion of kinetic energy of progressive movement into kinetic energy of a rotational movement, characterised in that the fender beam (1) is connected with beater elements (5) of rotor arrangements for absorbing energy (2), which comprise at least two serially coupled racks (6, 7, 8) driving toothed wheels (10) of the kinetic energy rotor accumulators (11, 12, 13), wherein between at least two serially coupled racks (6, 7, 8) a shock absorbing elements (9) are situated enabling for translocation of the racks (6, 7, 8) with relation to each other.

Inventors:
GUMULA, Stanislaw (ul. Kijowska 48/40, Kraków, PL-30-079, PL)
RAMUT, Jacek (ul. Karpacka 102, 58-533 Kostrzyca, PL)
LAGIEWKA, Przemyslaw (ul. Wiejska 29/5, Kowary, PL-58-530, PL)
Application Number:
IB2013/001495
Publication Date:
January 16, 2014
Filing Date:
July 10, 2013
Export Citation:
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Assignee:
EPAR SP. Z.O.O. (ul. Łączna 1, Karpacz, PL-58-540, PL)
International Classes:
E01F15/14
Domestic Patent References:
WO2004028864A1
WO2005121593A1
Foreign References:
DE9412166U1
DE4224548A1
US1638501A
US20080083686A1
EP2439339A1
Attorney, Agent or Firm:
KANCELARIA PATENTOVA ŁUKASZYK (ul. Głowackiego 8/6, 41-062 Katowice, Łukaszyk Szymon, PL)
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Claims:
Patent Claims:

1. A safety fence of pillar elements of a building comprising a fender beam attached to at least two rotor arrangements for absorbing energy, fixed to the side walls of pillar, in which by means of racks and toothed wheels kinetic energy rotor accumulators (11 , 12, 13) are driven, causing a conversion of kinetic energy of progressive movement into kinetic energy of a rotational movement, characterized in that the fender beam (1) is connected with beater elements (5) of rotor arrangements for absorbing energy (2), which comprise at least two serially coupled racks (6, 7, 8) driving toothed wheels (10) of the kinetic energy rotor accumulators (11 , 12, 13), wherein between at least two serially coupled racks (6, 7, 8) a shock absorbing elements (9) are situated enabling for translocation of the racks (6, 7, 8) with relation to each other.

2. The safety fence of pillar elements according to Claim 1 , characterized in that the kinetic energy rotor accumulators (11 , 12, 13) have differentiated capability of energy accumulation.

3. The dynamic mooring arrangement according to Claim 1 or 2, characterized in that the kinetic energy rotor accumulators (11 , 12, 13) have differentiated moments of inertia.

4. The safety fence of pillar elements according to Claim 1 or 2 or 3, characterized in that the fender beam is preferably ended with arc-like bends (4) extending on side walls of pillar (3).

Description:
SAFETY FENCE OF PILLAR ELEMENTS OF A BUILDING

The present invention relates to a safety fence of pillar elements of a building, designed especially for protecting protruding elements of a buildings, exposed to effects of impacts with vehicles. The impacts of vehicles with the pillar element of building, in case of high energy impact, may lead to building collapse. The force taken over by the pillar element during the impact depends on many different factors, especially mass of the vehicle, its speed and impact angle.

In order to protect pillar elements of building, elastic impact absorbing materials are used, in a form of shields made of plastic or deformable, spatial metal constructions. Also known solution can be used, converting kinetic energy of progressive movement of the of the vehicle taking part in the collision into kinetic energy of a rotational movement of rotor energy accumulators. Such a solution is known from EP2439339, which discloses a variable geometry road barrier, which in case of collision induces, by means of toothed gears, rotational movement of rotor kinetic energy accumulators.

International patent application WO2004028864 discloses a device for absorbing energy, in which an beater element energy is connected with two toothed bars which by medium of toothed wheels drive kinetic energy rotor accumulators in forms of rods with moveable weights slidably mounted on the rods. An appropriate progressiveness of energy absorption is obtained in this known solution by employment of the moveable weights located as close to the rotation axis of the rotor with the rods as possible in order that a moment of inertia of the rotor in the initial phase of energy absorption be as small as possible. In further movement phase while the rotor starts to rotate, the weights start to translocate under influence of centrifugal force and move away from the rotation axis along the rod axis, until they reach the rod end limiters and in such weight positions the biggest moment of inertia of rotor is achieved that enables for absorption of increased kinetic energy. Intemational application WO2005121593 discloses a rotor device for absorbing and dissipating energy, comprising a beater element cooperating with a toothed bar inducing rotation of an kinetic energy rotor accumulators by means of toothed wheels, causing a conversion of energy resulted from an impact into kinetic energy of a rotational movement of accumulators.

The known solutions do not provide effective shock absorption of energy related with different masses and velocities of vehicles. Therefore the object of the present invention is to provide better efficiency of absorption and dissipation of kinetic energy of impacts of different random amounts.

A safety fence of pillar elements of a building according to the present invention comprises a fender beam attached to at least two rotor arrangements for absorbing energy, fixed to the side walls of pillar, in which by means of racks and toothed wheels kinetic energy rotor accumulators are driven, causing a conversion of kinetic energy of progressive movement into kinetic energy of a rotational movement. The present invention is characterised in that the fender beam is connected with beater elements of rotor arrangements for absorbing energy, which comprise at least two serially coupled racks driving toothed wheels of the kinetic energy rotor accumulators, wherein between at least two serially coupled racks a shock absorbing elements are situated enabling for translocation of the racks with relation to each other.

The kinetic energy rotor accumulators preferably have differentiated capability of energy accumulation.

The kinetic energy rotor accumulators preferably have differentiated moments of inertia. The fender beam is preferably ended with arc-like bends extending on side wails of pillar.

By means of shock absorbing elements situated between at least two serially coupled racks there are provided the gaps between racks, which provide a gradual actuation of successive kinetic energy rotor accumulators enabling for abrupt stepped increase of energy absorption capability. Such a construction provides a possibility of adjustment of capability of shock absorption of safety fence with relation to varied impact energies. By disposing in front of the successive racks the shock absorbing elements, an impact load of the cooperating element at the actuation of the successive kinetic energy rotor accumulators is decreased. Use of differentiated moments of inertia of successive kinetic energy rotor accumulators, especially if kinetic energy rotor accumulator driven by means of the first rack has smaller moment of inertia that the moment of inertia of the kinetic energy rotor accumulator driven by means of the second rack, enables for smooth and gradual increase of capability of accumulation of kinetic energy of impacts. A safety fence according to the present invention is suitable for absorbing energy of low energy impacts as well as for absorbing energy of high energy impacts In the first instance the device provides efficient and very smooth impact energy absorption, as absorption of kinetic energy of progressive movement takes place with using kinetic energy rotor accumulators of the smallest moment of inertia. In the second instance, the device according to the present invention also provides appropriately efficient and uniform shock-absorption of impact energy, as kinetic energy absorption takes place with using several rotor accumulators of increasing energy absorption capabilities.

In case of impacts of greater energy an additional effect occurs in the device according to the present invention consisting in that impact kinetic energy is for the most part accumulated in the kinetic energy rotor accumulators of smaller moment of inertia before the kinetic energy rotor accumulators of bigger moment of inertia are actuated. Such a sequence of energy absorption provides smooth operation of the device according to the present invention during actuation of next rotor accumulators, even those of the greatest moment of inertia.

The exemplary embodiments of the present invention are presented below in connection with the attached drawings on which Fig. 1 shows safety fence mounted on the pillar element of building, Fig. 2 presents an cross-sectional view through rotor arrangements for absorbing energy, and Fig. 3 presents an exploded view of rotor arrangements for absorbing energy.

As shown schematically in the embodiment of Fig. 1 , fender beam 1 is connected with the rotor arrangements for absorbing energy 2 mounted on the side walls of pillar element 3 of building. The arc-like bends 4, formed on the ends of fender beam 1, partially extend on side walls of pillar 3, covering protruding movable beater elements 5 of the rotor arrangements for absorbing energy 2.

As shown in the embodiment of Fig. 2 and Fig. 3 the beater element 5 of kinetic energy absorption rotor arrangement 2 is coupled with three serially connected racks 6, 7, 8. Between the racks 6, 7, 8, as well as between the beater element 5 and the first rack 6, gaps are defined enabling for proper operation of shock absorbing elements and providing relative movement of racks 6, 7, 8 with relation to each other and between the beater element 5. Each of the racks 6, 7, 8 is interengaged with the toothed wheel 10 driving kinetic energy rotor accumulator 11 , 12, 13 wherein for providing increased efficiency of absorption and dissipation of impact energy the first kinetic energy rotor accumulator 1 driven by means of the first rack 6 has the smallest moment of inertia, the second kinetic energy rotor accumulator 12 driven by means of the second rack 7 has the medium moment of inertia, while the third kinetic energy rotor accumulator 13 driven by means of the third rack 8 has the greatest moment of inertia.

The beater element 5 is slidably coupled with the side walls of the housing 14, to which also a guide of racks 6, 7, 8 is fixed. The return spring 15 cooperates with the last rack 8, supporting return of racks 6, 7, 8 to initial position.

As shown in the embodiment of Fig. 3, the slidably mounted guide pins 17 are embaded in the openings 16 of the housing 14. To the side walls of housing 14 screen plate 18 is screwed, bearing one-sidedly pins 19 of kinetic energy rotor accumulators, and to the back wall of housing 14 a back screen plate 20 is mounted, supporting return spring 15. Furthermore, there are the openings 21 in the side wall of housing 14, fixing the rotor arrangement 2 to the side wall of pillar 3.

A progressivity characteristic of absorption of impact energy may be adjusted by appropriate selection of effective diameters of the driving toothed wheels 10 and by appropriate selection of moments of inertia of successive kinetic energy rotor accumulators 11 , 12, 13. In the disclosed exemplary embodiments of the present invention also unidirectional couplings are used (not presented on drawings), disposed between toothed wheels 10 and the kinetic energy rotor accumulator 11 , 12, 13. The function of the unidirectional couplings is to transfer a torque to the kinetic energy rotor. After absorbing the energy of an impact, when the angular velocity of the appropriate toothed wheel 10 shall be smaller than the angular velocity of the appropriate kinetic energy rotor accumulator 11 , 12, 13, then the unidirectional coupling becomes disconnected thus enabling for unrestricted rotation of the kinetic energy rotor accumulator 11 , 12, 13.

Energy acting on beater element 5 during an impact of vehicle with fender beam 1 is transferred by means of the beater element 5 to the racks 6, 7, 8 and to the kinetic energy rotor accumulators 1 , 12, 13. In a result of serial arrangement of the racks 6, 7, 8, is realized a successive actuation of kinetic energy rotor accumulators 11 , 12, 13 starting from the kinetic energy rotor accumulator 11 of the smallest moment of inertia, and ending with the kinetic energy rotor accumulator 13 of the greatest moment of inertia. In the solution according to the present invention, the maximal idle stroke of the beater element 5 relative to the last rack 8 driving the kinetic energy rotor accumulator 13 of the greatest moment of inertia is the sum of the gaps between the beater element 5 and the first rack 6 and between the racks 6, 7, 8.