WO1988010231A1 - Grappin - Google Patents

Grappin Download PDF

Info

Publication number
WO1988010231A1
WO1988010231A1 PCT/SE1988/000329 SE8800329W WO8810231A1 WO 1988010231 A1 WO1988010231 A1 WO 1988010231A1 SE 8800329 W SE8800329 W SE 8800329W WO 8810231 A1 WO8810231 A1 WO 8810231A1
Authority
WO
WIPO (PCT)
Prior art keywords
prongs
knee
grapple
bucket
joint mechanism
Prior art date
Application number
PCT/SE1988/000329
Other languages
English (en)
Inventor
Astrid HAMMARBÄCK
Original Assignee
Hammarbaeck Astrid
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 Hammarbaeck Astrid filed Critical Hammarbaeck Astrid
Publication of WO1988010231A1 publication Critical patent/WO1988010231A1/fr
Priority to FI890773A priority Critical patent/FI890773A0/fi
Priority to NO89890722A priority patent/NO890722L/no

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C3/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith and intended primarily for transmitting lifting forces to loose materials; Grabs
    • B66C3/14—Grabs opened or closed by driving motors thereon
    • B66C3/16—Grabs opened or closed by driving motors thereon by fluid motors

Definitions

  • the present invention relates to a grapple device, preferably designed tobe used iriloading and unloading of goods, such as timber or bulk material.
  • Grapple devices for timbe /pulp and bucket devices for pulp material often have different design, although the mechanism performing the opening can be the same for the two devices.
  • Timber grapples have during the last 30 years developed from comparatively heavy constru tions towards smaller and lighter constructions where the geometry of grip- and movement of the grapple device all the time has developed to better suit its purpose.
  • Sometimes the lifetime of the more complex version of the modern grapple devices has become unacceptably short at the same time as the need for service has increased.
  • One explanation to this negative development can probably be found in the choose of just one hydraulic cylinder.
  • the main purpose of the present invention is to obtain a grapple device beeing both compact - low construction hight - and per ⁇ forming a very favourable geometry of movement.
  • An other purpose of the invention is to obtain a grapple device performing a very favourable geometry of forces.
  • Yet an other object of the present invention is to obtain a grapple device combined with a conventional rotator and a crane, which forms very effective device for loading and unloading of pulpwood.
  • the figure is a schematic perspective view of a grapple device according to the invention.
  • the prongs 1 and 2 are both movably articulated around the shaft 3.
  • a knee-joint mechanism 4 and 5 connects the prongs 1 and 2 at both sides of the shaft 3.
  • Between the cross-bars 6 and 7 is a double acting hydraulic piston-cylinder device 7.
  • the inlet of hydraulic fluid at the +-side of the device provides a powerful and slow closing movement and inlet at the —side provides a faster and less powerful opening movement of the " two prongs.
  • a rotator At the upper side of the knee-jointata rotator can be placed.
  • the gripping geometry shown by the prongs 1 and 2 is surprisingly favourable.
  • the prongs can be opened to an extend where their points will be directed substantially in parallell and downwards. This is of advantage for the ability to from above be able to grip into e.g. a pulpwood stack. When the prongs grip the load, this will at the same time be moved a little bit upwards, which in a favourable way makes it easier for the logs to roll in between the prongs.
  • the waist mounting of the hydraulic devices preferably takes place at both sides of the vertical symetrical axis of the grapple device.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Prostheses (AREA)
  • Portable Nailing Machines And Staplers (AREA)

Abstract

Grappin, de préférence destiné à charger et décharger du bois à pâte ou des matériaux en vrac, comprenant deux pinces ou demi-godets mobiles l'un vers l'autre et raccordés à un axe central au niveau de leurs extrémités supérieures. L'invention est caractérisée en ce qu'un mécanisme à genouillère (4, 5) est raccordé entre les pinces (1, 2) ou demi-godets (1, 2) des deux côtés de leur axe central (3), et en ce qu'au moins un dispositif d'application de force (7) est raccordé entre le mécanisme à genouillère et l'une des pinces (2).
PCT/SE1988/000329 1987-03-18 1988-06-16 Grappin WO1988010231A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FI890773A FI890773A0 (fi) 1987-03-18 1989-02-17 Gripanordning.
NO89890722A NO890722L (no) 1987-03-18 1989-02-21 Gripeanordning.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8701108A SE8701108A0 (sv) 1987-03-18 1987-03-18 Hanteringsanordning
SE8701108-6 1987-06-22

Publications (1)

Publication Number Publication Date
WO1988010231A1 true WO1988010231A1 (fr) 1988-12-29

Family

ID=20367896

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1988/000329 WO1988010231A1 (fr) 1987-03-18 1988-06-16 Grappin

Country Status (5)

Country Link
AU (1) AU1959188A (fr)
FI (1) FI890773A0 (fr)
NO (1) NO890722L (fr)
SE (1) SE8701108A0 (fr)
WO (1) WO1988010231A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2862756A (en) * 1955-05-31 1958-12-02 Robert W Larson Pulpwood grapple
SE300288B (fr) * 1966-12-20 1968-04-22 Hydrauliska Ind Ab
GB1311900A (en) * 1970-06-23 1973-03-28 Weimar Kombinat Veb Crane grabs
GB1429219A (en) * 1973-03-20 1976-03-24 Elliot C N Gripping device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2862756A (en) * 1955-05-31 1958-12-02 Robert W Larson Pulpwood grapple
SE300288B (fr) * 1966-12-20 1968-04-22 Hydrauliska Ind Ab
GB1311900A (en) * 1970-06-23 1973-03-28 Weimar Kombinat Veb Crane grabs
GB1429219A (en) * 1973-03-20 1976-03-24 Elliot C N Gripping device

Also Published As

Publication number Publication date
SE8701108D0 (sv) 1987-03-18
NO890722D0 (no) 1989-02-21
NO890722L (no) 1989-02-21
FI890773A (fi) 1989-02-17
AU1959188A (en) 1989-01-19
SE8701108A0 (sv) 1988-12-23
FI890773A0 (fi) 1989-02-17

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