EP0052088A1 - Gegen Zusammenstoss schützende Vorrichtung - Google Patents

Gegen Zusammenstoss schützende Vorrichtung Download PDF

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Publication number
EP0052088A1
EP0052088A1 EP81850197A EP81850197A EP0052088A1 EP 0052088 A1 EP0052088 A1 EP 0052088A1 EP 81850197 A EP81850197 A EP 81850197A EP 81850197 A EP81850197 A EP 81850197A EP 0052088 A1 EP0052088 A1 EP 0052088A1
Authority
EP
European Patent Office
Prior art keywords
vehicle
arms
radiation
elements
devices
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Withdrawn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
EP81850197A
Other languages
English (en)
French (fr)
Inventor
Ewert Lindell
Bertil Wolgast
Göte Granath
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.)
Bygg- och Transportekonomi (BT) AB
Original Assignee
Bygg- och Transportekonomi (BT) AB
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 Bygg- och Transportekonomi (BT) AB filed Critical Bygg- och Transportekonomi (BT) AB
Publication of EP0052088A1 publication Critical patent/EP0052088A1/de
Withdrawn legal-status Critical Current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

  • the present invention relates to an improved collision guard primarily for driverless industrial trucks designed to carry pallets, etc.
  • the vehicle When the vehicle reverses to fetch a pallet or other load it must not run into a human being or other obstacle. It is therefore necessary to "teach" the vehicle to distinguish between obstacles like people, when it must stop, and other objects like pallets which it is to fetch.
  • this problem is solved by providing the vehicle with two rearward-protruding arms located on either side of the load and accordingly straddling it.
  • the arms can themselves cause injury if they strike anyone while the truck is reversing and they are therefore spring-loaded and fitted with switches or corresponding elements which cause the vehicle to stop or at least reduce its speed when the arms come into contact with anything.
  • the arms are fitted with at least two devices which transmit and receive suitable continuous or intermittent acoustic or electromagnetic waves such as infrared light, radar or ultrasonics passing between the arms.
  • the devices control the drive unit of the vehicle in such a manner that an interruption in the beam of the first device causes the vehicle to reduce speed and an interruption in the beam of the second device causes the vehicle to stop unless two sensing elements on each arm between the first and the second device have both indicated that a pallet-like object has been introduced between the arms. For example, if a person is standing in the way between the arms only one or none of these sensing elements will be actuated. The vehicle 6ill accordingly stop.
  • the chassis of the vehicle is designated with the numeral 1 and the load-carrying elements, which consist of forks, for example, with the numeral 2.
  • the vehicle 1 is equipped with rearward-protruding arms 3 which extend beyond the load-carrying elements 2.
  • Each arm consists of an inner portion 3 situated nearest the vehicle 1 and an outer portion 4.
  • the outer portion 4 slides telescopically into the inner portion 3 against spring pressure.
  • One of the aforementioned arms 3 is fitted on the side facing the other arm with at least two radiation-emitting devices (transmitters) 5, 7.
  • transmitters transmitters
  • Opposite the aforementioned radiation-emitting devices 5,7 are radiation-receiving devices 6,8.
  • the latter devices may also consist of reflectors which reflect the beam back to the respective transmitter 5, 7, which is then combined with a receiver.
  • transmitters 5,7 and receivers 6, 8 on each arm are devices 9, 10 which sense objects in their immediate vicinity.
  • devices 9, 10 may consist of switches fitted with actuating "feelers" but may also consist of more complicated apparatus such as radar equipment.
  • the vehicle described above works in the following manner.
  • the pallet is introduced between the arms 3, 4.
  • the beam between the outermost radiation-emitting and receiving devices 5, 6 is then interrupted and the speed of the vehicle 1 is reduced.
  • the pallet is brought into contact with both the sensing elements which then indicate that the intended object is situated between the arms 3, 4 with the result that the vehicle is not qaused to stop when the beam between the inner radiation-emitting and receiving devices 7,8 is interrupted.
  • the outermost ray is interrupted in the same manner as described above and the speed of the vehicle is reduced.
  • the two sensing devices 9, 10 are not actuated simultaneously since the distance between the arms is too great with the result that when the inner beam is interrupted the vehicle 1 is caused to stop.
  • a collision guard has accordingly been achieved which effectively prevents injuries to persons and damage to objects.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Steroid Compounds (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
EP81850197A 1980-11-06 1981-10-23 Gegen Zusammenstoss schützende Vorrichtung Withdrawn EP0052088A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8007824 1980-11-06
SE8007824A SE436184B (sv) 1980-11-06 1980-11-06 Pabackningsskydd

Publications (1)

Publication Number Publication Date
EP0052088A1 true EP0052088A1 (de) 1982-05-19

Family

ID=20342188

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81850197A Withdrawn EP0052088A1 (de) 1980-11-06 1981-10-23 Gegen Zusammenstoss schützende Vorrichtung

Country Status (5)

Country Link
EP (1) EP0052088A1 (de)
DK (1) DK490581A (de)
FI (1) FI813345L (de)
NO (1) NO813545L (de)
SE (1) SE436184B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0309796A2 (de) * 1987-09-29 1989-04-05 Jungheinrich Aktiengesellschaft Sicherheitseinrichtung für Gabelfahrzeuge
WO1996022939A1 (en) * 1995-01-27 1996-08-01 Andersson Hakan Collision protection

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2282201A (en) * 1940-10-18 1942-05-05 Us Patent Dev And Royalty Comp Lift truck
US3034675A (en) * 1959-10-02 1962-05-15 Yale & Towne Mfg Co Carriage control for lift trucks
DE1944786A1 (de) * 1968-08-29 1970-03-05 Simon Handling Eng Ltd Transport- und Stapelvorrichtung
US3672470A (en) * 1969-11-26 1972-06-27 Eaton Yale & Towne Photoelectric control for load handling device
DE2254012A1 (de) * 1972-11-04 1974-05-16 Clark Equipment Co Lichtbezugssystem zur hilfe des bedienungspersonals beim positionieren von lasthebevorrichtungen u. dgl
US4109233A (en) * 1974-12-20 1978-08-22 Honeywell Inc. Proximity sensor
DE7833012U1 (de) * 1978-11-07 1979-03-29 Wirus-Werke W. Ruhenstroth Gmbh, 4830 Guetersloh Schutzvorrichtung an Förderzeugen
DE2904123A1 (de) * 1978-02-15 1979-08-16 Bygg Och Transportekonomie Ab Sicherheitsvorrichtung fuer kraftkarren, insbesondere fuer hubwagen und gabelstapler

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2282201A (en) * 1940-10-18 1942-05-05 Us Patent Dev And Royalty Comp Lift truck
US3034675A (en) * 1959-10-02 1962-05-15 Yale & Towne Mfg Co Carriage control for lift trucks
DE1944786A1 (de) * 1968-08-29 1970-03-05 Simon Handling Eng Ltd Transport- und Stapelvorrichtung
AT300652B (de) * 1968-08-29 1972-08-10 Simon Handling Eng Ltd Transport- und Stapelvorrichtung
US3672470A (en) * 1969-11-26 1972-06-27 Eaton Yale & Towne Photoelectric control for load handling device
DE2254012A1 (de) * 1972-11-04 1974-05-16 Clark Equipment Co Lichtbezugssystem zur hilfe des bedienungspersonals beim positionieren von lasthebevorrichtungen u. dgl
US4109233A (en) * 1974-12-20 1978-08-22 Honeywell Inc. Proximity sensor
DE2904123A1 (de) * 1978-02-15 1979-08-16 Bygg Och Transportekonomie Ab Sicherheitsvorrichtung fuer kraftkarren, insbesondere fuer hubwagen und gabelstapler
DE7833012U1 (de) * 1978-11-07 1979-03-29 Wirus-Werke W. Ruhenstroth Gmbh, 4830 Guetersloh Schutzvorrichtung an Förderzeugen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Materials Handling News, March 1977 London "Now Driverless Lift Too" * page 57, column 3, line 32 to 40 * *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0309796A2 (de) * 1987-09-29 1989-04-05 Jungheinrich Aktiengesellschaft Sicherheitseinrichtung für Gabelfahrzeuge
DE3732724A1 (de) * 1987-09-29 1989-04-13 Jungheinrich Kg Sicherheitseinrichtung fuer gabelfahrzeuge
EP0309796A3 (en) * 1987-09-29 1990-06-20 Jungheinrich Unternehmensverwaltung Kg Security device for fork-lift trucks
WO1996022939A1 (en) * 1995-01-27 1996-08-01 Andersson Hakan Collision protection

Also Published As

Publication number Publication date
SE8007824L (sv) 1982-05-07
SE436184B (sv) 1984-11-19
DK490581A (da) 1982-05-07
FI813345L (fi) 1982-05-07
NO813545L (no) 1982-05-07

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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

Designated state(s): DE FR GB

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

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Withdrawal date: 19821026

RIN1 Information on inventor provided before grant (corrected)

Inventor name: LINDELL, EWERT

Inventor name: GRANATH, GOETE

Inventor name: WOLGAST, BERTIL