EP0360761A1 - Corps pneumatique avec flèche de fonction contrôlée pour absorber les chocs de véhicules - Google Patents

Corps pneumatique avec flèche de fonction contrôlée pour absorber les chocs de véhicules Download PDF

Info

Publication number
EP0360761A1
EP0360761A1 EP89830333A EP89830333A EP0360761A1 EP 0360761 A1 EP0360761 A1 EP 0360761A1 EP 89830333 A EP89830333 A EP 89830333A EP 89830333 A EP89830333 A EP 89830333A EP 0360761 A1 EP0360761 A1 EP 0360761A1
Authority
EP
European Patent Office
Prior art keywords
tubular element
pneumatic bag
tubular
valve body
slots
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP89830333A
Other languages
German (de)
English (en)
Inventor
Paolo Marangoni
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MAMMUTH TYRES Srl
Original Assignee
MAMMUTH TYRES Srl
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MAMMUTH TYRES Srl filed Critical MAMMUTH TYRES Srl
Publication of EP0360761A1 publication Critical patent/EP0360761A1/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F15/00—Safety arrangements for slowing, redirecting or stopping errant vehicles, e.g. guard posts or bollards; Arrangements for reducing damage to roadside structures due to vehicular impact
    • E01F15/14—Safety arrangements for slowing, redirecting or stopping errant vehicles, e.g. guard posts or bollards; Arrangements for reducing damage to roadside structures due to vehicular impact specially adapted for local protection, e.g. for bridge piers, for traffic islands
    • E01F15/145—Means for vehicle stopping using impact energy absorbers

Definitions

  • the present invention relates to a con­trolled-yielding pneumatic bag for absorbing impacts of vehicles and self-moving apparatus in general.
  • each road path comprises zones or portions of great potential danger, there­at there are usually arranged anti-accident protect­ing means.
  • these pro­tecting means consist generally of rigid systems (walls and the like) or semirigid systems (such as guard-rails) or systems adapted for being permanent­ly deformed (such as metal posts) which are convent­ionall arranged at the edge portions of a road.
  • a guard-­rail operates as an impact damper element exclusi­vely if it is tangentially impacted, so as to elong­ate as far as possible the contact region with the impacting vehicle, the damping effect depending on the permanent deformations of said guard-rail.
  • Metal posts are efficient ex­clusively if they are suitably deformed, that is ex­clusively if the impacting vehicle trajectory coin­cides with the subsequent positions of these posts.
  • the present invention sets out to overcome the above mentioned drawbacks, by providing a pneumatic bag or "cushion" member,adap­ted to absorb impacts from vehicles in general,which is exclusively operated by atmospheric pressure air.
  • a main object of the present invention is to provide such a vehicle impact absorbing pneumatic bag which is very simple construction-wise and very reliable in operation.
  • Another object of the present invention is to provide such a pneumatic bag which can be speci­fically designed depending on the use requirements and can be constructed as a modular unit adapted for association with a plurality of like intercon­nected modular units.
  • a controlled-­yielding pneumatic bag for absorbing impacts of vehicles characterized in that said bag essentially consists of a flexible tubular element closed at the two ends thereof by corresponding disc members, one of said disc members coaxially supporting a hollow body which communicates with the inside of said tubular element and with the outside environ­ment through suitably arranged slots; inside said hollow body, or valve body, being provided two coaxial tubular bodies adapted to slide in opposite direc­tions, each of said coaxial tubular bodies being counterbiassed by a respective spring, said coaxial tubular bodies being also provided with circumferen­tial slots, said tubular bodies being arranged and designed so as to interrupt, upon sliding, the communication between the inside of said tubular element and outside environment, so as to cause said tubular element to fully absorb an impact caused by a colliding vehicle.
  • the anti-accident pneumatic bag according to the invention comprises a flexible tubu­lar element 1 consisting of metal and/or synthetic and/or naturally occurring threads, said structure being coated by vulcanized rubber.
  • This tubular element is closed, at the two ends thereof, by corresponding closure disc mem­bers 2 and 3 which respectively coaxially support a hollow body or valve body 4 and a rigid buffer or stopper 5.
  • valve body is pro­vided with an intermediate narrowed portion 6 which defines an outer chamber 7 and inner chamber 8 with respect to said tubular element.
  • first tubular body or slider 11 which is also pro­vided with circumferential slots 12 and being counter­biassed by a helical coil spring 13.
  • first tubular body 14 coaxially ex­tending inside the first tubular body and being in turn counterbiassed by a respective helical coil spring 15 engaging against the mentioned narrowed portion 6.
  • the mentioned rigid stopper 5 operates as a bearing member for the thus constructed assembly against the abutment member 16 adapted to operate as a reaction member against an impact caused by a colliding vehicle, and also adapted to operate as an end of stroke stop element for the valve body 4.
  • the mentioned valve body 4 is so designed and arranged that the sole connections of said valve body between the inner volume of the tubular element and the atmosphere consist of the mentioned slots 9 and 10.
  • valve body 4 As a vehicle, or self-­moving apparatus, as indicated generally by the arrow 17, having a given speed and, accordingly, a given motion amount, collides against the front of the subject pneumatic bag, the valve body 4, closure and locking disc member 2 and front portion of the tubular element 1 will instantaneously pass from a zero speed to the colliding vehicle speed.
  • the slider member 14 will be subjected to such a force that it will overcome the counter­biassing spring 15 force and "cover" as shown in figure 2, the slots 10 so as to trap all of the air contained at atmospheric pressure in the envelope or tubular member 1.
  • the kinetic energy of the colliding vehicles starts to be transferred to the inside of the tubular element and this tubular element, as it volume is decreased because of its resiliency and deforming properties, will allow for air con­tained therein to be adiabatically pressed (in fact, because of the very short duration of the phenomenon it is possible to assume that there is no energy dis­persion by thermal transmission through the walls of the tubular element).
  • the inner air energy increase will correspond, instant by instant, to the kinetic energy being lost by the colliding vehicle.
  • valve body 4 During the energy absorbing period, the valve body 4 will be subjected to an inertial force having an opposite direction to that generated by the impact.
  • valve closure character­istic can be considered as a continuous closure cha­racteristic and, accordingly, also the kinetic ener­gu will be absorbed in a continuous manner.
  • the slider members 11 and 14 will be relocated at the home positions (figure 4) and will open the connection between the inside of the tubular element 1 and atmosphere, thereby allowing for pressurized air to be immediately discharged so as to prevent a undesired recoiling phenomenon from occurring.
  • This slider member which closes the valve at the impact instant, holds the valve in a closed condition as far as the impact energy holds said slider member at its slot 10 covering position be­cause of the resilient deforming of the biassing spring and during the relocating step.
  • valve body is properly de­signed, then the opening time will be so short that it will not appreciably limit the operating character­ists of the system.
  • the above disclosed anti-accident absorbing bag is adapted, by using atmospheric pressure air, to firstly absorb and then dissipate the kinetic energy of a moving vehi­cle.
  • valve body is insensible, in its designing range to the physical characteristics of the motion of the colliding vehicle; this is due to the fact that the sole physical factor which controls its operation consists of the status varia­tion of the motion of the component elements of the system. Accordingly, under motion conditions, the inertial unbalancing of the slider members 11 and 14 will provide absorbing favorable positions.
  • the en­velope 1 which preferably consists of a vulcanized and belted rubber cylinder, likewise to a smooth pneumatic tire, has such a shape and volume which is related to the provided absorbing capabilities and, if desired, it can also be made as a bellows or the like elements.
  • the specific horizontal axis structure of the subject anti-accident bag affords the possibility of arranging a plurality of like bags in a coupled relationship with respect to one another, the connection being made by slide floor sliding supporting elements so as to provide a very effi­cient and high absorbing capability system.
  • the subject system operates substantially as a plunger which, as it is subjected to an impact, will press an air chamber or bladder closed by a plug, which is disengaged, at the end of the pressing phenomenon (with the colliding vehi­cle in a stop condition), that is before the kinematic discharging of the inner pressure energy.
  • the geometric characteristics of the envelope will be designed so as to allow for a sufficient braking space in order not to exceed deceleration values greater than those which has been experimentally found as dangerous (the highest decelerations occur, at the end of the braking as the reaction due to the pressure of the air held in the envelope is the highest).
  • the spring included in the subject system have ben mechanically designed so as to slight­ly advance the valve opening with respect to the colliding vehicle stopping.
  • the deformation of the spring, and related displacement of the slider members and hence the closure of the outflow duct will be proportional to the impact intensity, and, accordingly, the valve closure time will be effective­ly optimal.
EP89830333A 1988-08-25 1989-07-18 Corps pneumatique avec flèche de fonction contrôlée pour absorber les chocs de véhicules Withdrawn EP0360761A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2175388 1988-08-25
IT2175388 1988-08-25

Publications (1)

Publication Number Publication Date
EP0360761A1 true EP0360761A1 (fr) 1990-03-28

Family

ID=11186385

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89830333A Withdrawn EP0360761A1 (fr) 1988-08-25 1989-07-18 Corps pneumatique avec flèche de fonction contrôlée pour absorber les chocs de véhicules

Country Status (1)

Country Link
EP (1) EP0360761A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0738802A1 (fr) * 1995-04-19 1996-10-23 SNOLINE S.p.A. Glissière de sécurité routière modulaire pour absorber progressivement l'énergie de choc des véhicules
WO1998033985A1 (fr) * 1997-02-03 1998-08-06 Kredietbank Dispositif barriere routiere
WO1999009258A1 (fr) * 1997-08-13 1999-02-25 Roller Joseph A Appareil pour la protection de supports de construction
CN105839568A (zh) * 2016-05-18 2016-08-10 长安大学 一种桥墩主动迎撞装置及防撞方法
CN107059698A (zh) * 2017-04-07 2017-08-18 周肇梅 一种安装固定在靠近高速道路超车道的防撞护栏
CN108221775A (zh) * 2018-03-16 2018-06-29 招商局重庆交通科研设计院有限公司 双向受拉耗能阻尼元件
CN113389160A (zh) * 2021-07-31 2021-09-14 马世永 一种道路交通安全气囊防护栏
CN113502769A (zh) * 2021-07-31 2021-10-15 马世永 一种交通道路紧急保护防护栏

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT281892B (de) * 1966-06-14 1970-06-10 Alberto Guzzardella Sicherheitseinrichtung an Fahrbahnen
US3661359A (en) * 1970-01-12 1972-05-09 Brooks Walker Energy absorber
US3690619A (en) * 1970-12-10 1972-09-12 Menasco Mfg Co Energy absorbing guardrail
DE7420685U (de) * 1974-06-18 1974-10-31 Schoemburg H Aufpralldämpfer für Motorradrennstrecken
DE2510106A1 (de) * 1974-03-08 1975-09-18 Road Research Ltd Stossdaempfer
EP0165738A2 (fr) * 1984-06-13 1985-12-27 Energy Absorption Systems, Inc. Coussin pneumatique pour l'absorption de l'énergie d'un impact

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT281892B (de) * 1966-06-14 1970-06-10 Alberto Guzzardella Sicherheitseinrichtung an Fahrbahnen
US3661359A (en) * 1970-01-12 1972-05-09 Brooks Walker Energy absorber
US3690619A (en) * 1970-12-10 1972-09-12 Menasco Mfg Co Energy absorbing guardrail
DE2510106A1 (de) * 1974-03-08 1975-09-18 Road Research Ltd Stossdaempfer
DE7420685U (de) * 1974-06-18 1974-10-31 Schoemburg H Aufpralldämpfer für Motorradrennstrecken
EP0165738A2 (fr) * 1984-06-13 1985-12-27 Energy Absorption Systems, Inc. Coussin pneumatique pour l'absorption de l'énergie d'un impact

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0738802A1 (fr) * 1995-04-19 1996-10-23 SNOLINE S.p.A. Glissière de sécurité routière modulaire pour absorber progressivement l'énergie de choc des véhicules
WO1998033985A1 (fr) * 1997-02-03 1998-08-06 Kredietbank Dispositif barriere routiere
WO1999009258A1 (fr) * 1997-08-13 1999-02-25 Roller Joseph A Appareil pour la protection de supports de construction
US6102611A (en) * 1997-08-13 2000-08-15 Hero Products, Inc. Apparatus for protecting structural supports
US6244781B1 (en) 1997-08-13 2001-06-12 Hero Products, Inc. Apparatus for protecting structural supports
US6494640B2 (en) 1997-08-13 2002-12-17 Hero Products, Inc. Apparatus for protecting structural supports
CN105839568A (zh) * 2016-05-18 2016-08-10 长安大学 一种桥墩主动迎撞装置及防撞方法
CN105839568B (zh) * 2016-05-18 2017-12-12 长安大学 一种桥墩主动迎撞装置及防撞方法
CN107059698A (zh) * 2017-04-07 2017-08-18 周肇梅 一种安装固定在靠近高速道路超车道的防撞护栏
CN107059698B (zh) * 2017-04-07 2019-04-26 河北上兴路桥工程有限公司 一种安装固定在靠近高速道路超车道的防撞护栏
CN108221775A (zh) * 2018-03-16 2018-06-29 招商局重庆交通科研设计院有限公司 双向受拉耗能阻尼元件
CN113389160A (zh) * 2021-07-31 2021-09-14 马世永 一种道路交通安全气囊防护栏
CN113502769A (zh) * 2021-07-31 2021-10-15 马世永 一种交通道路紧急保护防护栏
CN113389160B (zh) * 2021-07-31 2023-08-08 冠县鼎高交通设施有限公司 一种道路交通安全气囊防护栏
CN113502769B (zh) * 2021-07-31 2023-10-31 广东建工德晟工程有限公司 一种交通道路紧急保护防护栏

Similar Documents

Publication Publication Date Title
US4674911A (en) Energy absorbing pneumatic crash cushion
EP2451675B1 (fr) Appareil d'absorption d'energie
US3752462A (en) Elastomeric spring and frictional damping shock absorber
US3743266A (en) Energy absorbing isolation system
US5443146A (en) Impact-absorbing shock absorber with deformation body
EP0360761A1 (fr) Corps pneumatique avec flèche de fonction contrôlée pour absorber les chocs de véhicules
US6027105A (en) Impact damper
US6299211B1 (en) Tensioner for a safety belt
WO2005085014A1 (fr) Dispositif de levage
US4352514A (en) Shock absorbing device
US6179356B1 (en) Impact damper for a motor vehicle and method of making same
US20040262829A1 (en) Resilient and deformable member for absorbing kinetic energy
EP1506111B1 (fr) Systeme amortisseur adaptatif
JP2506324B2 (ja) エネルギ吸収空気衝撃クツシヨン
US6752423B2 (en) Protective assembly for a motor vehicle passenger's lower limbs
US3715114A (en) Shock absorbing bumper
US20080035438A1 (en) Damping Device with Power-Assisted Deceleration and Use Thereof for the Damping of the Retractable Steering Column of a Motor Vehicle
US3960397A (en) Energy-absorbing bumper system
WO2010086888A2 (fr) Système d'absorption et de blocage d'énergie découlant d'un impact ou d'une collision d'un véhicule
KR100199805B1 (ko) 차량의 충격흡수 및 분산장치
US3476434A (en) Vehicle with shock absorbing mounting
US3823969A (en) Pneumatic shock absorbing bumper
KR101235628B1 (ko) 안전벨트 충격완충장치
KR100196174B1 (ko) 차량충돌시 충격을 완화하는 범퍼와 충격완화장치
CN207984775U (zh) 碰撞吸能装置及车辆防撞梁总成

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE ES FR GB LI NL

17P Request for examination filed

Effective date: 19900723

17Q First examination report despatched

Effective date: 19910717

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19911128