GB2190352A - Lifting apparatus - Google Patents

Lifting apparatus Download PDF

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Publication number
GB2190352A
GB2190352A GB08610585A GB8610585A GB2190352A GB 2190352 A GB2190352 A GB 2190352A GB 08610585 A GB08610585 A GB 08610585A GB 8610585 A GB8610585 A GB 8610585A GB 2190352 A GB2190352 A GB 2190352A
Authority
GB
United Kingdom
Prior art keywords
lifting
truck
fork
stay
pivotally attached
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Withdrawn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
GB08610585A
Other versions
GB8610585D0 (en
Inventor
Peter Grant
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.)
WOOD TREATMENT Ltd
Original Assignee
WOOD TREATMENT Ltd
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 WOOD TREATMENT Ltd filed Critical WOOD TREATMENT Ltd
Priority to GB08610585A priority Critical patent/GB2190352A/en
Publication of GB8610585D0 publication Critical patent/GB8610585D0/en
Publication of GB2190352A publication Critical patent/GB2190352A/en
Withdrawn legal-status Critical Current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
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/061—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks characterised by having a lifting jib

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Forklifts And Lifting Vehicles (AREA)

Abstract

Lifting apparatus (10) for use with a fork lift truck (11) to enable large loads (21) to be lifted through large height ranges, comprises a beam (15) pivotally attached at a mid location to the slide (12) of the mast (13) of the truck (11). The forward end (17) of the beam (15) has a lifting tine attached thereto, whilst the rear end is pivotally attached to stay (19) itself pivotally attached to a the counterbalance weight (14) of the truck (11). Raising the slide (12) causes a load (21) attached to the tine to be raised by a greater distance than the slide (12). The beam (15) and stay are secured by quick release pins (16,20) for ease of attachment and removal. <IMAGE>

Description

SPECIFICATION Lifting apparatus This invention relates to lifting apparatus, and in particular to lifting apparatus for use with a fork-lift truck for lifting heavy loads through a large height range.
The invention provides lifting apparatus comprising a beam adapted to be pivotally attached at a mid-location thereof to a mast of a fork-lift truck, stay means having one end thereof pivotally attached to one end of said beam and the other end adapted to be pivotally attached to said truck, and load lifting means disposed at the other end of said beam.
One embodiment of lifting apparatus will now be described with reference to the accompanying drawings in which; Fig. 1 is a side elevation with the lifting means in a lowered position, and, Fig. 2 is a side elevation with the lifting means in a raised position.
Referring now to the figures there is shown a lifting means 10 attached to a fork-lift truck 11. The fork-lift truck 11 has a slide 12 mounted on a mast 13 at the front of the truck 11 and movable upwardly relative thereto by means of an hydraulic piston and cylinder device or devices (not shown). To counter-balance the weight of any load carried by the fork-lift truck, such loads usually being carried by tines (not shown) attached to the slide 12, there is a counterbalance weight 14 provided at the rear of the truck 11.
The lifting means 10 comprises a beam 15 which is pivotally secured to the top of the slide 12 by means of a quick-release pin 16.
The beam 15 tapers from a mid-region, through which the pivot pin 16 passes, to its ends. At the forward end 17 of the beam 15 is a load lifting tine 18. Other forms of load lifting means may be provided such as a hook, clamp, lugs with a pin passing therethrough, or the like. At the rear end 18 of the beam 15, one end of a stay 19 is pivotally secured. The other end of the stay 19 is pivotally secured by means of a second quickrelease pin 20 to a lug provided on the counterbalance weight 14 of the truck 11.
Removal of the quick-release pins 16 and 20 enables the lifting apparatus 10 to be easily removed from the truck 11 when not required, and it may be easily replaced when required.
With the slide 12 in its lowered position relative to the mast 13, as shown in Fig. 1, a load such as for example a bag 21 may be engaged by the tine 18. The slide 12 may then be raised in conventional manner relative to the mast 13, as shown in Fig. 2. Since the rear end 18 of the beam 15 is restrained by the stay 19 to remain at a fixed distance from the counterbalance weight 14, the beam 15 will rotate about the pivot pin 16 and the forward end 17 of the beam will rise by a considerably greater extent than does the slide 12. The ratio of tine lift to slide lift will de pend upon the relative distances of the tine 18 and the pivot pin 16 from the rear end 18 of the beam 15, for example if the pivot pin 16 is located centrally. of the beam 15 the aforementioned ratio will be approximately 2.
By means of the invention, large, heavy loads, for example large bags of approximately 1 tonne in weight, may be easily lifted to a considerable height. Any fork-lift truck can be readily adapted for the mounting thereon of the lifting apparatus of the present invention, and when so adapted the lifting apparatus can be easily and quickly fitted or removed when necessary. In addition the loads may be lifted at an extended reach in relation to the fork-lift -truck, which may be an advantage in certain cases when the truck cannot be positioned close to either the load or the place to which it is to be moved.
1. Lifting apparatus comprising a beam adapted to be pivotally attached at a mid location thereof to a mast of a fork-lift truck, stay means having one end thereof pivotally attached to one end part of said beam, and load lifting means disposed at the other end part of said beam.
2. Lifting means according to claim 1 wherein said beam comprises pivot means at said mid-location, and said pivot means com prises a pivot pin.
3. Lifting means according to claim 2 wherein said pin is a quick-release pin.
4. Lifting means according to any one of claims 1 to 3 wherein said end parts of said beam taper away from said mid-location to wards the ends thereof.
5. Lifting means according to any one of claims 1 to 4 wherein said load lifting means comprises a load lifting tine.
6. Lifting means according to any one of claims 1 to 5 wherein the other end of said stay means has connecting means attached thereto, said connecting means being adapted to pivotally connect said stay means to a fork lift truck.
7. Lifting means according to claim 6 wherein said stay connecting means com prises a quick-release pin.
8. Lifting means substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
9. A fork-lift truck having lifting apparatus attached thereto, said lifting apparatus com prising a beam pivotally attached at a mid location thereof to a mast of said truck, stay means having one end thereof pivotally attached to one end part of said beam and the other end thereof pivotally attached to said truck, and load lifting means disposed at the
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (1)

  1. **WARNING** start of CLMS field may overlap end of DESC **.
    SPECIFICATION Lifting apparatus This invention relates to lifting apparatus, and in particular to lifting apparatus for use with a fork-lift truck for lifting heavy loads through a large height range.
    The invention provides lifting apparatus comprising a beam adapted to be pivotally attached at a mid-location thereof to a mast of a fork-lift truck, stay means having one end thereof pivotally attached to one end of said beam and the other end adapted to be pivotally attached to said truck, and load lifting means disposed at the other end of said beam.
    One embodiment of lifting apparatus will now be described with reference to the accompanying drawings in which; Fig. 1 is a side elevation with the lifting means in a lowered position, and, Fig. 2 is a side elevation with the lifting means in a raised position.
    Referring now to the figures there is shown a lifting means 10 attached to a fork-lift truck 11. The fork-lift truck 11 has a slide 12 mounted on a mast 13 at the front of the truck 11 and movable upwardly relative thereto by means of an hydraulic piston and cylinder device or devices (not shown). To counter-balance the weight of any load carried by the fork-lift truck, such loads usually being carried by tines (not shown) attached to the slide 12, there is a counterbalance weight 14 provided at the rear of the truck 11.
    The lifting means 10 comprises a beam 15 which is pivotally secured to the top of the slide 12 by means of a quick-release pin 16.
    The beam 15 tapers from a mid-region, through which the pivot pin 16 passes, to its ends. At the forward end 17 of the beam 15 is a load lifting tine 18. Other forms of load lifting means may be provided such as a hook, clamp, lugs with a pin passing therethrough, or the like. At the rear end 18 of the beam 15, one end of a stay 19 is pivotally secured. The other end of the stay 19 is pivotally secured by means of a second quickrelease pin 20 to a lug provided on the counterbalance weight 14 of the truck 11.
    Removal of the quick-release pins 16 and 20 enables the lifting apparatus 10 to be easily removed from the truck 11 when not required, and it may be easily replaced when required.
    With the slide 12 in its lowered position relative to the mast 13, as shown in Fig. 1, a load such as for example a bag 21 may be engaged by the tine 18. The slide 12 may then be raised in conventional manner relative to the mast 13, as shown in Fig. 2. Since the rear end 18 of the beam 15 is restrained by the stay 19 to remain at a fixed distance from the counterbalance weight 14, the beam 15 will rotate about the pivot pin 16 and the forward end 17 of the beam will rise by a considerably greater extent than does the slide
    12. The ratio of tine lift to slide lift will de pend upon the relative distances of the tine 18 and the pivot pin 16 from the rear end 18 of the beam 15, for example if the pivot pin 16 is located centrally. of the beam 15 the aforementioned ratio will be approximately 2.
    By means of the invention, large, heavy loads, for example large bags of approximately 1 tonne in weight, may be easily lifted to a considerable height. Any fork-lift truck can be readily adapted for the mounting thereon of the lifting apparatus of the present invention, and when so adapted the lifting apparatus can be easily and quickly fitted or removed when necessary. In addition the loads may be lifted at an extended reach in relation to the fork-lift -truck, which may be an advantage in certain cases when the truck cannot be positioned close to either the load or the place to which it is to be moved.
    1. Lifting apparatus comprising a beam adapted to be pivotally attached at a mid location thereof to a mast of a fork-lift truck, stay means having one end thereof pivotally attached to one end part of said beam, and load lifting means disposed at the other end part of said beam.
    2. Lifting means according to claim 1 wherein said beam comprises pivot means at said mid-location, and said pivot means com prises a pivot pin.
    3. Lifting means according to claim 2 wherein said pin is a quick-release pin.
    4. Lifting means according to any one of claims 1 to 3 wherein said end parts of said beam taper away from said mid-location to wards the ends thereof.
    5. Lifting means according to any one of claims 1 to 4 wherein said load lifting means comprises a load lifting tine.
    6. Lifting means according to any one of claims 1 to 5 wherein the other end of said stay means has connecting means attached thereto, said connecting means being adapted to pivotally connect said stay means to a fork lift truck.
    7. Lifting means according to claim 6 wherein said stay connecting means com prises a quick-release pin.
    8. Lifting means substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
    9. A fork-lift truck having lifting apparatus attached thereto, said lifting apparatus com prising a beam pivotally attached at a mid location thereof to a mast of said truck, stay means having one end thereof pivotally attached to one end part of said beam and the other end thereof pivotally attached to said truck, and load lifting means disposed at the other end part of said beam.
    10. A fork lift truck according to claim 9 wherein said beam and said stay are pivotally attached to said truck by means of quick release pins.
    11. A fork lift truck according to claim 9 or claim 10 comprising a counterbalance weight, wherein said stay is pivotally attached to said counterbalance weight.
    12. A fork lift truck substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
GB08610585A 1986-04-30 1986-04-30 Lifting apparatus Withdrawn GB2190352A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08610585A GB2190352A (en) 1986-04-30 1986-04-30 Lifting apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08610585A GB2190352A (en) 1986-04-30 1986-04-30 Lifting apparatus

Publications (2)

Publication Number Publication Date
GB8610585D0 GB8610585D0 (en) 1986-06-04
GB2190352A true GB2190352A (en) 1987-11-18

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
GB08610585A Withdrawn GB2190352A (en) 1986-04-30 1986-04-30 Lifting apparatus

Country Status (1)

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GB (1) GB2190352A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2222814A (en) * 1988-09-15 1990-03-21 Jack Worsnop Hoists, particularly for lifting disabled persons

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB293628A (en) * 1927-11-25 1928-07-12 Arthur James Pascoe An improved hoisting device
GB658579A (en) * 1949-06-02 1951-10-10 James Edward Peters Improvements relating to hydraulic hoists
GB778741A (en) * 1955-02-26 1957-07-10 Joseph Armstrong Whittall Improvements in, or relating to, cranes
GB800272A (en) * 1954-08-13 1958-08-20 Portasilo Ltd Improvements in or relating to lifting and lowering mechanism
US3851777A (en) * 1972-06-13 1974-12-03 M Dilny Adjustable boom attachment
GB1501432A (en) * 1975-04-03 1978-02-15 Generale Engrais Sa Tractor having apparatus for use in loading a distributing hopper
GB2163126A (en) * 1984-08-18 1986-02-19 Bamford Excavators Ltd A boom and method of operating it
US4579504A (en) * 1983-09-12 1986-04-01 Lemme Daniel C Crane for lifting device such as fork lift

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB293628A (en) * 1927-11-25 1928-07-12 Arthur James Pascoe An improved hoisting device
GB658579A (en) * 1949-06-02 1951-10-10 James Edward Peters Improvements relating to hydraulic hoists
GB800272A (en) * 1954-08-13 1958-08-20 Portasilo Ltd Improvements in or relating to lifting and lowering mechanism
GB778741A (en) * 1955-02-26 1957-07-10 Joseph Armstrong Whittall Improvements in, or relating to, cranes
US3851777A (en) * 1972-06-13 1974-12-03 M Dilny Adjustable boom attachment
GB1501432A (en) * 1975-04-03 1978-02-15 Generale Engrais Sa Tractor having apparatus for use in loading a distributing hopper
US4579504A (en) * 1983-09-12 1986-04-01 Lemme Daniel C Crane for lifting device such as fork lift
GB2163126A (en) * 1984-08-18 1986-02-19 Bamford Excavators Ltd A boom and method of operating it

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2222814A (en) * 1988-09-15 1990-03-21 Jack Worsnop Hoists, particularly for lifting disabled persons

Also Published As

Publication number Publication date
GB8610585D0 (en) 1986-06-04

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)