EP0499097B1 - Antikollisionssicherheitsvorrichtung für Gabelstapler und dergleichen - Google Patents

Antikollisionssicherheitsvorrichtung für Gabelstapler und dergleichen Download PDF

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Publication number
EP0499097B1
EP0499097B1 EP19920101518 EP92101518A EP0499097B1 EP 0499097 B1 EP0499097 B1 EP 0499097B1 EP 19920101518 EP19920101518 EP 19920101518 EP 92101518 A EP92101518 A EP 92101518A EP 0499097 B1 EP0499097 B1 EP 0499097B1
Authority
EP
European Patent Office
Prior art keywords
safety device
vehicle
cam
accordance
fitted
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.)
Expired - Lifetime
Application number
EP19920101518
Other languages
English (en)
French (fr)
Other versions
EP0499097A2 (de
EP0499097A3 (en
Inventor
Roberto Muselli
Armando Neri
Gianluigi Orsi
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.)
GD SpA
Jobs SpA
Original Assignee
GD SpA
Jobs SpA
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Filing date
Publication date
Application filed by GD SpA, Jobs SpA filed Critical GD SpA
Publication of EP0499097A2 publication Critical patent/EP0499097A2/de
Publication of EP0499097A3 publication Critical patent/EP0499097A3/en
Application granted granted Critical
Publication of EP0499097B1 publication Critical patent/EP0499097B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F17/00—Safety devices, e.g. for limiting or indicating lifting force
    • B66F17/003—Safety devices, e.g. for limiting or indicating lifting force for fork-lift trucks

Definitions

  • This invention relates to an anti-collision safety device designed in particular for fork-lift trucks and similar vehicles. More specifically, the invention relates to a device consisting of a bar or bumper, fitted to a telescopic support able to traverse and rotate slightly in relation to the truck, which activates suitable alarm and/or stop devices when it collides with an obstacle.
  • the invention is characterised by the special configuration of the parts, which is designed to improve and increase the practicality of the safety devices currently fitted to elevators, automatic-drive trucks, etc.
  • Safety devices designed to avoid or limit the damage deriving from collisions between the vehicle and an obstacle are already known, being generally fitted to trucks, elevators and vehicles designed for use in factories, construction sites and other workplaces.
  • These devices usually consist of bumpers, feelers or the like fitted to the truck which can counteract the force exerted by elastic elements to perform limited movements and which activate an alarm device or stop the movement of the vehicle in the event of a collision.
  • US-A-3,023,829 shows a safety device for fork-lift trucks comprising a bumper mounted on a pair of sleeve housings.
  • the sleeve housings are secured to the frame of the vehicle and the bumper can slide with respect to each one or both said housings.
  • This movements of the bumper with respect to the housings activate means for stopping the vehicle when the movements of the said bumper exceeds a pre-set value.
  • FR-A-2 633 571 shows a safety device comprising a bumper mounted on an extensible support and comprising telescopically extensible, rearwards directed wings.
  • the invention relates to a safety device for fork-lift trucks, wherein a bumper is mounted on a pair of pistons sliding into corresponding cylinders which can rotate with respect to the chassis of the vehicle, so providing a simple safety apparatus.
  • a useful feature would be safety devices designed to detect obstacles at the sides of the truck when it is turning corners.
  • this invention proposes an anti-collision safety device for vehicles, in particular fork-lift trucks, which comprises a telescopic support to the front of which is fitted a bumper, preferably also telescopic, which can be extended further forward than the load on the forks and which is connected to the vehicle control equipment.
  • This telescopic support can slide and rotate slightly in relation to a pair of guides built into the truck chassis; during these movements it activates a set of microswitches connected to equipment designed to stop the vehicle.
  • the safety device assembly in accordance with the invention is indicated by the number 3.
  • these devices basically consist of a pair of telescopic supports 4 to the end of which is fitted a bumper 5 equipped with a pair of lateral telescopic arms 6, each of which has the end 7 facing backwards.
  • the bumper width and its distance from the truck can therefore be suitably adjusted so that load 8 resting on the forks is surrounded at the front, and the bumper is kept at the most appropriate distance from the load.
  • Telescopic supports 4 comprise a pair of hydraulic cylinders 9, rigidly connected one to another by crosspieces 10, which run inside a pair of guides 11 consisting of two C-sections fixed to the vehicle chassis.
  • Each of guides 11 (fig. 3) is fitted with a pair of horizontal-axis rollers 12 and a vertical-axis roller 13, which project slightly from the contour of the guide.
  • Cylinders 9 can perform limited movements along guides 11 and, resting against rollers 12 and 13 which keep them at a given distance from the said guides, can also rotate slightly around the point of contact with the rollers.
  • the said structure of the telescopic support activates a pair of devices like the one illustrated in fig. 4 and indicated as a whole by the number 14, which are able to activate the vehicle control devices in the event that the bumper collides with an obstacle along the route.
  • control devices comprise a shaft 15, built into one of crosspieces 10, for example, along which a pair of cam elements 16, kept apart by a helical spring 17 or the like, can run against a pair of travel limit elements 18 built into the vehicle chassis.
  • a pair of adjustable retainers 19 limits the movements of the cams along shaft 15.
  • Two microswitches 20 connected to the vehicle control panel or to devices able to stop the vehicle are placed between cam elements 16 and at a distance from them.
  • telescopic support 4 is regulated to bring bumper 5 to the desired distance from the load on the forks; the bumper width is also adjusted in relation to the size of both the load and the vehicle.
  • the telescopic support assembly retracts or rotates slightly in relation to guides 11 to which it is fitted, moving with it shaft 15 which causes one of cams 16 to engage the corresponding microswitch 20, thereby stopping the movement of the vehicle or signalling the presence of the obstacle to the driver.
  • Microswitches 20 will not be placed directly in contact with cams 16 but at a distance from them to prevent the safety devices from being activated, for example, by vibrations transmitted to the structure while the vehicle is moving as a result of uneven flooring and the like.
  • the cam device shown in fig. 4 can also be configured differently, for example as illustrated in fig. 5, where a cam element 21, kept mid-way between two fixed supports 23 by a pair of springs 22, can run along shaft 15.
  • the cam presents a flat section of a certain length to allow the telescopic support a minimum of free travel without the microswitch's being engaged, to prevent small movements caused by vibrations from activating the device.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Vehicle Step Arrangements And Article Storage (AREA)

Claims (6)

  1. Sicherheitsvorrichtung für Gabelstapler,
    umfassend
    einen Stoßfänger (5), der an den Kolben eines teleskopartigen Trägers (4) angebracht ist, dessen Zylinder (9) im Fahrzeugchassis untergebracht sind,
    dadurch gekennzeichnet,
    daß der Stoßfänger sich im Einsatz weiter nach vorne erstreckt als die auf der Gabel befindliche Last, und daß die Zylinder (9) derart im Chassis der Hubgabel untergebracht sind, daß sie bis zu einem begrenzten Ausmaß relativ zu dem Chassis sich verschieben und drehen können, wobei sie mit einer Einrichtung verbunden sind, die dazu ausgelegt ist, Vorrichtungen (14) zu aktivieren, die das Fahrzeug anhalten, wenn die Bewegungen und/oder Verdrehungen der Zylinder einen vorbestimmten Wert überschreiten.
  2. Sicherheitsvorrichtung nach Anspruch 1,
    dadurch gekennzeichnet,
    daß der teleskopartige Träger (4) aus einem Paar von hydraulischen Kolben besteht, die in Zylindern (9) gleiten, die innerhalb von C-förmigen Führungen (11) angeordnet sind, wobei leerlaufende Rollen (12) in den Führungen angebracht sind, und etwas aus diesen vorstehen, so daß sie die Zylinder in einem geringen Abstand von den Seiten der Führung halten und ermöglichen, daß diese sich bis zu einem begrenzten Ausmaß verschieben und/oder drehen können.
  3. Sicherheitsvorrichtung nach den vorhergehenden Ansprüchen,
    wobei der Träger (4) während seiner Bewegungen einen Nocken (16,28) beaufschlagt, der dazu ausgelegt ist, Mikroschalter (20) zu betägigen, die an die Fahrzeugsteuervorrichtungen angeschlossen sind.
  4. Sicherheitsvorrichtung nach Anspruch 3,
    wobei der Nocken (16,21) sich frei bis zu einem gewissen Ausmaß bewegen kann, bevor die Mikroschalter (20) beaufschlagt werden.
  5. Sicherheitsvorrichtung nach Anspruch 3 und 4,
    wobei die Vorrichtungen (14) einen Schaft (15) aufweisen, an dem ein Paar von Nocken (16), die durch elastische Elemente (17) in einem Abstand voneinander gehalten werden, sich bewegen kann, wobei Wegbegrenzungselemente (18), die mit den Nocken in Eingriff treten, in das Fahrzeugchassis eingebaut sind und Mikroschalter (20), die mit den Fahrzeugsteuereinrichtungen in Verbindung stehen, in dem Abstand zwischen diesen Nocken angeordnet sind.
  6. Sicherheitsvorrichtung nach Anspruch 3 und 4,
    dadurch gekennzeichnet,
    daß diese Nockeneinrichtungen (14) einen in den teleskopartigen Träger eingebauten Schaft aufweisen, an dem ein mit einem flachen mittigen Abschnitt versehener Nocken (21) angebracht ist, wobei ein Mikrokschalter 20, der mit den Fahrzeugsteuereinrichtungen verbunden ist, mit dem flachen mittigen Abschnitt dieses Nockens (21) in Eingriff tritt, wenn der teleskopartige Träger (4) mit dem Fahrzeug ausgerichtet ist.
EP19920101518 1991-02-12 1992-01-30 Antikollisionssicherheitsvorrichtung für Gabelstapler und dergleichen Expired - Lifetime EP0499097B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITPC910003U 1991-02-12
IT91PC000003U IT225709Y1 (it) 1991-02-12 1991-02-12 Dispositivo di sicurezza antiurto per carrelli elevatori o simili.

Publications (3)

Publication Number Publication Date
EP0499097A2 EP0499097A2 (de) 1992-08-19
EP0499097A3 EP0499097A3 (en) 1993-03-10
EP0499097B1 true EP0499097B1 (de) 1996-11-06

Family

ID=11388942

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920101518 Expired - Lifetime EP0499097B1 (de) 1991-02-12 1992-01-30 Antikollisionssicherheitsvorrichtung für Gabelstapler und dergleichen

Country Status (5)

Country Link
EP (1) EP0499097B1 (de)
JP (1) JPH05147482A (de)
DE (1) DE69214971T2 (de)
ES (1) ES2093119T3 (de)
IT (1) IT225709Y1 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE503915C2 (sv) * 1995-01-27 1996-09-30 Andersson Hakan Påkörningsskydd
CN100360347C (zh) * 2005-04-12 2008-01-09 赵铁生 可自由伸缩式、缓冲、吸能汽车防撞保险杠
CN102069768A (zh) * 2009-11-25 2011-05-25 凌建军 一种机动车安全防撞装置及带有该防撞装置的机动车底盘
CN102582550B (zh) * 2012-02-29 2014-10-01 长城汽车股份有限公司 一种溃缩防撞梁系统
CN104859440A (zh) * 2015-06-12 2015-08-26 邓莉莉 滑移式agv导航小车
CN114873509A (zh) * 2022-06-06 2022-08-09 中科微至科技股份有限公司 Agv用旋转举升装置

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1922570A (en) * 1932-04-30 1933-08-15 Shano Ray J De Automatic safety brake
US3023829A (en) * 1960-06-10 1962-03-06 Brake And Bearing Service Co I Obstruction operated brake setting mechanism for road vehicle
US3744588A (en) * 1971-12-28 1973-07-10 M Nave Vehicular brake actuating device
FR2499536B1 (fr) * 1981-02-06 1985-07-05 Constr Telephoniques Dispositif de protection pour chariot de manutention
US4397372A (en) * 1981-03-09 1983-08-09 Bell & Howell Company Pendulum suspended bumper assembly
DE3213957C2 (de) * 1982-04-16 1987-04-02 Mannesmann AG, 4000 Düsseldorf Auffahrabschaltung für ein Fahrzeug
US4496274A (en) * 1982-08-11 1985-01-29 Eaton Corporation Material handling vehicle
CH662992A5 (fr) * 1985-03-01 1987-11-13 Jd Technologie Ag Dispositif de protection contre les tamponnements pour vehicules de transport au sol.
DE3732724A1 (de) * 1987-09-29 1989-04-13 Jungheinrich Kg Sicherheitseinrichtung fuer gabelfahrzeuge
FR2633571B1 (fr) * 1988-06-30 1992-01-10 Axter Sa Bouclier de protection a deux positions

Also Published As

Publication number Publication date
IT225709Y1 (it) 1997-01-13
JPH05147482A (ja) 1993-06-15
ITPC910003V0 (it) 1991-02-12
EP0499097A2 (de) 1992-08-19
ITPC910003U1 (it) 1992-08-12
DE69214971T2 (de) 1997-03-06
DE69214971D1 (de) 1996-12-12
ES2093119T3 (es) 1996-12-16
EP0499097A3 (en) 1993-03-10

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