AU655337B2 - Lifting pin and system - Google Patents

Lifting pin and system Download PDF

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Publication number
AU655337B2
AU655337B2 AU29501/92A AU2950192A AU655337B2 AU 655337 B2 AU655337 B2 AU 655337B2 AU 29501/92 A AU29501/92 A AU 29501/92A AU 2950192 A AU2950192 A AU 2950192A AU 655337 B2 AU655337 B2 AU 655337B2
Authority
AU
Australia
Prior art keywords
pin
socket
head
lifting
threads
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.)
Ceased
Application number
AU29501/92A
Other versions
AU2950192A (en
Inventor
Frederick John Humphries
Robert David Partridge
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.)
LANESFIELD ENGINEERING LIFTING GEAR Ltd
Original Assignee
LANESFIELD ENG LIFTING
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 LANESFIELD ENG LIFTING filed Critical LANESFIELD ENG LIFTING
Publication of AU2950192A publication Critical patent/AU2950192A/en
Application granted granted Critical
Publication of AU655337B2 publication Critical patent/AU655337B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
    • B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
    • B66C1/62—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means comprising article-engaging members of a shape complementary to that of the articles to be handled
    • B66C1/66—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means comprising article-engaging members of a shape complementary to that of the articles to be handled for engaging holes, recesses, or abutments on articles specially provided for facilitating handling thereof
    • B66C1/666—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means comprising article-engaging members of a shape complementary to that of the articles to be handled for engaging holes, recesses, or abutments on articles specially provided for facilitating handling thereof for connection to anchor inserts embedded in concrete structures
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/14—Conveying or assembling building elements
    • E04G21/142—Means in or on the elements for connecting same to handling apparatus

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Lining And Supports For Tunnels (AREA)
  • Paper (AREA)

Description

k OPI DATE 15/p6/93 AOJP DATE 19/08/93 PCT NUMBER PCT/GB92/02155 AU9229501 IN 1C N1 I EO/I I~jN tAI 1-rrL1%_'.jI OI~JN rUOLI3rflCL) u 'I Jrr' In r rtA ICINI rK/ 1 UIN 1 Kr,.ix i j trCT) (51) International Patent Classification 5 (11) International Publication Number: WO 93/10321] E04G 21/14, B66C 1/66, At (43) International Publication Date: 27 Mayi 1993 (27.05,93) (21) International Application Number: Pk2TG B92 /02155 (74) Agent: SHAW. Laurence:* George House. GeorgeRod Edgbaston, Birmingham B15 I PG (GB).
(2 2 In te rn a tio n a l F ilin g D a te 2 0 N o v e m b e r 1 9 9 2 (2 0 .1 1 .9 2 8 D s g a e S t e A T A U B G B R C C H C Priority data: DE, DK. ES. Fl. GB. HU. JP, KP. KR. LK. LU. MG.
9124730.9 21 November 1991 (21.11.91) GB3 N. MWV. NL. NO. PL. RO. RU. SD. SE. US. European patent (AT. BE. CH. DE. DK. ES. FR. GB. GR, IE, IT. LU. MC. NL. SE). GAPI patent (BF. BJ. CF.
-(7+4~4en fo Pdc4oidSa9--S-LA--& CG, CI. CM. GA. GN. MIL. MIR. SN. TD. TG).
-\VNI-4-,R-L(CrB)7-Published WI it/h internatiooal score/ report.
(72) Inventors; and Befowe thie exjinration of t/ie i/ow limit for ooiend(Ija 11w Insentors/Applicants (for US on/i) HUM PH RIES, Freder- c/Oiti5 and to be repuh/k/ied inii/ ti eii o/ thie eipt'i qf ick, John PARTRIDGE. Robert. David [GB amniments.
GB]; Johnson Street. Woodcross. Coselev. Bilston. WestDI Midlands kV14 9RL (GB).
6vG/A,53A' (54)Title: LIFTING PIN AND SYSTEM (57) Abstract A lifting pin (10) has a lifting head (11) and a threaded shank i the shank being received in the threaded portion (25) of a socket formed in the concrete body (21) to be lifted.
12 14 13 is 24A 1 6 21A 17 24 0 2O21 22 47 23 LIFTING PIN AND SYSTEM The invention relates to a lifting pin and more particularly to a system of lifting a heavy object such as a concrete body to be placed in an intended location. One specific use in which the invention is seen to good effect is in the placement of segments to build up a tunnel liring. For convenience the invention will be described with reference to that particular use that the invention is not to be limited thereby.
It is known to cast a threaded socket in a concrete segment and to locate a threaded pin in that socket. The pin comprises a shank which is received in Sthe socket and a head which can be engaged by the end of o. an articulated arm mounted on a crane or the like by which the concrete segment can be lifted into place.
00 o
S
The arm is disengaged following which the pin is removed .and then grout can be pumped through the socket to fill Sa space behind the segment, e.g. the annulus between the tunnel lining and the tunnel bore wall. Unfortunately, this method of lifting is unreliable because the pin can 20 unthread itself from the lifting mechanism especially when the concrete segment tends to rotate. Clearly this has safety implications.
It is therefore an object of the present invention to overcome or ameliorate at least some of K N'~i -67 -8 1 2 these deficiencies of the prior art.
According to the invention in one aspect there is provided a method of lifting a concrete body for placement, e.g. as a segment of a tunnel lining, the method comprising engaging a lifting pin in a threaded socket therefor in the body, the pin having a head and a threaded shank, the socket and the pin having complementary threads shaped to cause the pin to interengage with the socket so as to enable the pin to engage the body for lifting and the threads of the pin being shaped to prevent unintentional threading of the pin from the socket; (ii) engaging the head of the pin with a lifting r 15 device and then moving the body to the intended place, separating the lifting device from the pin and *(iii) releasing the pin from the socket.
Preferably the threads of the threaded shank comprise sloping sidewalls, one of which is steeper and shorter than the other and in this embodiment the
I:
threads should be arranged so that the lead in face of each thread, i.e. the one which leads into the socket, is the shorter and steeper and so presents minimal resistance whereas the trailing face presents a larger area for the subsequent unthreading. Preferably the faces are inclined
.W
I
V'J
WO 93/10321 PCT/GB92/02155 3 that the pressure generated at the trailing face is about three times as great as at the leading face. Preferably the threads are in a helix. Preferably the threads are shaped so that there is a three point start for speed of insertion of the pin in the socket. The shank may include a frustoconical portion between the threaded portion and the head of the pin to engage with a complementary portion of the body.
1 The threaded socket is preferably formed of Nylon or like plastic and has side flanges to anchor the socket in the concrete body.
When the socket is cast in the concrete body, the concrete will j fill the space behind the threads so providing deep tapered iv shoulders of set concrete. As a result of the interengagement of the threads of the pin and those of the socket and the concrete II shoulders behind those socket threads, the pin can be used to i lift a heavy concrete body. A pin of the invention can be used Sto lift a heavy concrete body and the socket can be used for 1 other purposes, e.g. grouting.
The head of the pin may be generally spherical and have sockets to receive a bar used to rotate the pin out of the socket.
Most preferably the method of lifting includes the step of locating the hood of a lifting means over the head of the pin, the hood containing a clamping device actuable to engage the head of the pin, and engaging the clamping device with the pin.
L -1 C- L~LI-- 1 1. _1--I WO 93/10321 PCT/GB92/02155 4 Preferably the clamping device comprises an upper bulb like body surrounded by a plurality of segmental fingers, the lower portion of the fingers being shaped to engage the head of the pin, and actuating cam means to urge the fingers to engage the head of the pin. Preferably the method includes the step of actuating the cam means from outside the hood.
In another aspect the invention provides a lifting pin comprising a head and a shan:,, the shank having a threaded portion, the threads being arranged in a helical path, the walls of the threads being shaped to prevent unintentional unthreading from a socket for the threaded shank and each having a relatively steep lead in angled face and a relatively shallow trailing angled face and the head of the pin being shaped for lifting.
In order that the invention may be well understood it will now be described with reference to the accompanying diagrammatic S. drawings, in which Figure 1 is a side elevation of one embodiment of a lifting pin accordino to the invention overlying and partly in a socket therefor set in a concrete segment; Figure 2A is an elevation partly in section of a lifting device about to engage the pin of Figure 1 and Figure 2B is a sectional view taken along lines II-II on Figure 2A; I '7 WO 93/10321 PCT/GB92/02155 I Figure 3A corresponds to Figure 2A showing the device in clasping engagement with the pin and Figure 3B is a sectional view taken along lines III-III on Figure 3A; and Figure 4A is a plan view and Figure 4B a vertical section of a plug used to seal the socket shown in Figure 1 The lifting pin 10 comprises an elongate steel body comprising a spherical head 11 on top of a neck 12 mounted on an annulus 13 having side flats 14. The pin may be made in any convenient way, for example by being machined from a length of bar. Below the annulus is a frustoconical portion 15 beneath which is a helically threaded shank 16. The threading is of helical form, each thread 17 comprising one relatively longer side wall 17A and one relatively shorter sidewall 17B. The ratio of the side walls may be selected so that there is a steep lead-in angle (side wall S17B) and a relatively shallower trailing angle (side wall 17A); the ratio may be about 3:1. The thread is a three point start for speed of insertion into a socket The socket 20 is cast in the body of concrete 21. The socket has a conical base portion 22 having an annular anchoring rim 23 at the lower face 21B of the concrete body. The top portion 24 of the socket is funnel shaped, having an annular rim 24A set in the upper face 21A of the body 21. The intermediate portion I cL cF ~I WO 93/10321 PCT/GB92/02155 6 of the socket 21 is threaded in a helix to complement that of the shank 16 of the pin 10. Because the socket 21 is cast in the concrete shoulders of set concrete are present behind the threads of the socket. The socket 20 is made of 2mm nominal thickness in a plastics such as NYLON.
In use, to lift the body 21 the pin 10 is threaded into the socket 20, the shape of the threads of the helix serving to engage the parts together and to lock them against unintentional unthreading. The body may then be lifted using the lifting device shown in Figures 2 and 3. Because of the engagement of the threads of the shank and those of the socket and the concrete behind, the pin may be used tso lift a heavy concrete body. The i!device comprises a hood 31 having a central socket 32 in the roof thereof for connection to an articulated limb or crane chain, neither of which is shown. A bulb-like body 33 depends from the I centre of the hood and is surrounded by a plurality of segmental fingers 34. The inner walls of the fingers 34 have upper and lower arcuate portions 35 adapted to engage the bulb body 33 and the head 11 of the pin 10 respectively. The outer surface of the fingers has a depression 36 at a position about 2/3 of the height. Opposite cam members 37 are present along the side walls of the hood 30, and can be moved vertically by bars 38 projecting beyond the hood and travelling in slots therefor. The slots are inclined along a helical path. When the cam members 37 are lowered from the raised condition shown in Figure 2 to the WO 93/10321 PCT/GB92/02155 7 lowered condition shown in Figure 3 the f.ingers are brought together so that they engage the head 11 of the pin 10, the free ends 39 of the fingers resting against the wall of the neck 12.
In this condition the concrete body 21 may be lifted, with confidence that the pin 11 is securely clamped to the lifting device 30 and is also held secure against any movement (axial or torsional) relative to the socket 30. After placement, the fingers 34 of the clamping device 30 are released from the head 11 of the pin 10 and the pin 10 is then unthreaded.
A plastics plug 40 shown in Figure 4 is then threaded into the socket 20, the plug corresponding in shape to the interior of the socket. The plug has a bore 41 and a blind end wall 42. The plug is used to block the socket 20 after pumping of grout behind the placed segment. The mouth of the plug may then be sealed.
The invention is not limited to the embodiment shown. The socket may comprise the threaded portion only and may not extend the full thickness of the body. One more sockets may be present per body but usually only one is needed. The plug may be serrated to destroy the socket. The body need not be a segment and may not be formed of concrete.

Claims (15)

1. A method of lifting a concrete body for placement, e.g. as a segment of a tunnel lining, the method comprising engaging a lifting pin in a threaded socket theref or in the body, the pin having a head and a threaded shank, the socket and the pin having complementary threads shaped to cause the pin to interengage with the socket so as to enable the pin to engage the body for lifting and the threads of the pin being shaped to prevent unintentional threading of the pin from the socket; (ii) engaging the head of t*ile pin with a lifting device and then moving the body to the intended place, separating the lifting device from the pin and 12 15 (iii) releasing the pin from the socket.
2. A method according to Claim 1, wherein the 4: threads of the threaded shank each comprise sloping sidewalls, one face of which leads into the socket and is steeper and shorter than the other trailing face.
3. A method according to Claim 1 or 2, wherein the I walls of the threads are shaped so that the pressure generated at the trailing face is about three times as great as at the lead in face.
4. A method according to Claim 1, 2 or 3 wherein the threads are in a helix and include a three point start.
P -X- 4 ic tt ir b U 1 T1-T1-T1-T1-T1-T1-T1-T1-T1-T1-T1-~i~~nmY 9 A method according to Claim 1, 2, 3 or 4 wherein the threaded socket is formed of plastic and has side flanges to ancho the socket in the concrete body.
6. A method according to Claim 5, wherein the socket is cast into the body so that concrete shoulders are formed in the threaded portion.
7. A method according to any preceding Claim, wherein the pin includes a frustoconical portion between the threaded shank and the head. 10
8. A method according to Claim 7, wherein the head of the pin is mounted on a neck portion.
9. A method according to any preceding Claim, in which the lifting device includes a hood which is located over the head of the pin, the hood containing a clamping device actuable to engage the head of the pin, and engaging the clamping device to the pin.
A method according t:c Claim 9, wherein the clamping device comprises an upper bulk like body surrounded by a plurality of segmental fingers, the lower port 4 on of the fingers being shaped to engage the head of the pin, and actuating cam means to urge the fingers to engage the head of the pin.
11. A method according to Claim 10, including actuating the cam means from outside the hood.
12. A lifting pin comprising a head and a shank, the L R .i ~1 1 r eo a n ooo 9 a oe a o o o a 9 o a shank having a threaded portion, the threads being arranged in a helical path, the walls of the threads being shaped to prevent unintentional unthreading from a socket for the threaded shank and the head being shaped for lifting.
13. A pin according to Claim 12, wherein the threading includes a three point start.
14. A pin according to Claim 12 or 13, including a frustoconical portion between the head and the threaded 10 portion of the shank.
15. A pin according to any of Claims 12 to 14, wherein the head of the pin is spherical and is connected by a neck portion to the shank. DATED this 12th day of October 1994 LANESFIELD ENGINEERING LIFTING GEAR LIMITED Attorney: LEON K. ALLEN Fellow Institute of Patent Attorneys of Australia of SHELSTON WATERS H e H 0 0 fl I as ~h- i :I Qr"
AU29501/92A 1991-11-21 1992-11-20 Lifting pin and system Ceased AU655337B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9124780 1991-11-21
GB9124780A GB2261650A (en) 1991-11-21 1991-11-21 Lifting pin
PCT/GB1992/002155 WO1993010321A1 (en) 1991-11-21 1992-11-20 Lifting pin and system

Publications (2)

Publication Number Publication Date
AU2950192A AU2950192A (en) 1993-06-15
AU655337B2 true AU655337B2 (en) 1994-12-15

Family

ID=10705022

Family Applications (1)

Application Number Title Priority Date Filing Date
AU29501/92A Ceased AU655337B2 (en) 1991-11-21 1992-11-20 Lifting pin and system

Country Status (6)

Country Link
EP (1) EP0568677A1 (en)
AU (1) AU655337B2 (en)
CA (1) CA2100871A1 (en)
FI (1) FI933271A (en)
GB (2) GB2261650A (en)
WO (1) WO1993010321A1 (en)

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NZ517869A (en) 1999-10-07 2003-02-28 Martin Thompson Panels and lifting implements therefor
GB2441763B (en) * 2006-09-16 2011-08-24 Jack Moody Ltd Method and apparatus for forming a building block
GB0701543D0 (en) 2007-01-26 2007-03-07 Airbus Uk Ltd Fitting,crane hook,and crane hook assembly
DE102008019912A1 (en) * 2008-04-21 2009-10-29 Carl Stahl Gmbh Slings and load lifting system for use with such a sling
DE102009050139A1 (en) * 2009-10-20 2011-04-21 Carl Stahl Gmbh Slings and load lifting system for use with such a sling
KR101220995B1 (en) * 2011-02-23 2013-01-10 김상기 Installing method of concrete block
US9109874B2 (en) 2012-12-29 2015-08-18 Conxtech, Inc. Modular, six-axis-adjustable, concrete-pour form-structure system
JP2016508553A (en) 2013-01-24 2016-03-22 コンクステック，インコーポレーテッド Multi-storey pipe support frame system with a modular side worker support scaffold that can be removably mounted
US9103132B2 (en) * 2013-01-27 2015-08-11 Conxtech, Inc. Dual-function, sequential-task, lug-registry, pick and stack-align building-component handling system
WO2014163964A1 (en) 2013-03-13 2014-10-09 Conxtech, Inc. Modular, faceted, block-and-shell node system for connecting elongate frame elements
EP3094588B1 (en) 2014-01-13 2022-05-04 Conxtech, Inc. Clasp-and-lug system
US10892180B2 (en) * 2014-06-02 2021-01-12 Applied Materials, Inc. Lift pin assembly
DE202015100568U1 (en) * 2015-02-06 2016-05-09 Philipp Gmbh Transport anchor and concrete component with at least one such transport anchor
USD768466S1 (en) 2015-03-30 2016-10-11 Conxtech, Inc. Rail pocket
USD796774S1 (en) 2015-03-30 2017-09-05 Conxtech, Inc. Rail pallet
USD768420S1 (en) 2015-03-30 2016-10-11 Conxtech, Inc. Toe kick
USD777947S1 (en) 2015-03-30 2017-01-31 Conxtech, Inc. Modular ladder
CN105696840B (en) * 2016-02-29 2018-04-24 杨春霞 A kind of construction and installation method of water tower
GB2569551A (en) * 2017-12-19 2019-06-26 Tophat Industries Ltd Lifting system
US11555317B2 (en) 2018-02-09 2023-01-17 Conxtech, Inc. Moment connection component clamping tool
WO2019157393A1 (en) 2018-02-09 2019-08-15 Conxtech, Inc. Moment connection component lifting tool assembly
GB2583459B (en) * 2019-04-05 2023-01-18 Berkeley Modular Ltd Post connector
GB2586023B (en) * 2019-07-29 2023-08-02 S C H Site Services Ltd Lifting Interface
DE102020201341A1 (en) 2020-02-04 2021-08-05 Zf Friedrichshafen Ag Method for grasping and moving in a lifting direction a component having a protruding socket by means of a lifting tool and a lifting tool with a plurality of gripping elements for grasping and moving in a lifting direction a component having a projecting socket
US11761560B2 (en) 2020-02-19 2023-09-19 Conxtech, Inc. Modular pipe rack system

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Also Published As

Publication number Publication date
AU2950192A (en) 1993-06-15
GB2261651A (en) 1993-05-26
EP0568677A1 (en) 1993-11-10
GB2261651B (en) 1995-01-11
WO1993010321A1 (en) 1993-05-27
GB9124780D0 (en) 1992-01-15
GB9224376D0 (en) 1993-01-13
CA2100871A1 (en) 1993-05-22
FI933271A0 (en) 1993-07-20
FI933271A (en) 1993-07-20
GB2261650A (en) 1993-05-26

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