WO1993010321A1 - Lifting pin and system - Google Patents
Lifting pin and system Download PDFInfo
- Publication number
- WO1993010321A1 WO1993010321A1 PCT/GB1992/002155 GB9202155W WO9310321A1 WO 1993010321 A1 WO1993010321 A1 WO 1993010321A1 GB 9202155 W GB9202155 W GB 9202155W WO 9310321 A1 WO9310321 A1 WO 9310321A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pin
- head
- socket
- lifting
- shank
- Prior art date
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
Definitions
- 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.
- a heavy object such as a concrete body
- One specific use in which the invention is seen to good effect is in the placement of segments to build up a tunnel lining. For convenience the invention will be described with reference to that particular use that the invention is not to be limited thereby.
- the pin comprises a shank which is received in the socket and a head which can be engaged by the end of an articulated arm mounted on a crane or the like by which the concrete segment can be lifted into place.
- the arm is disengaged following which the pin is removed and then grout can be pumped through the socket to fill a space behind the segment, e.g. the annulus between the tunnel lining and the tunnel bore wall.
- this method of lifting is unreliable because the pin can unthread itself from the lifting mechanism especially when the concrete segment tends to rotate. Clearly this has safety implications.
- a method of lifting a concrete body for placement e.g. as a segment of a tunnel lining, the method comprising
- the threads of the threaded portion comprise sloping side walls, one of which is relatively steeper and longer than the other.
- the threads are preferably 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 are larger area for the subsequent unthreading.
- the faces are inclined so that the pressure generated at the trailing face is about thre times as great as at the leading face.
- the thread are in a helix.
- the threads are shaped so that ther is a three point start for speed of insertion of the pin in th socket.
- the shank may include a frustoconical portion betwee the threaded portion and the head of the pin to engage with complementary portion of the body.
- the threaded socket is preferably formed of Nylon or like plasti and has side flanges to anchor the socket in the concrete body.
- the concrete wil fill the space behind the threads so providing deep tapere shoulders of set concrete.
- the pin can be used t lift a heavy concrete body.
- a pin of the invention can be use to lift a heavy concrete body and the socket can be used fo 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.
- 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.
- 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.
- the method includes the step of actuating the cam means from outside the hood.
- the invention provides a lifting pin comprising a head and a shank, 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.
- Figure 1 is a side elevation of one embodiment of a lifting pin according 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;
- 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;
- 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 17B) 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 20.
- the socket 20 is cast in the body of concrete 21.
- the socket 20 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 21 of the body 21.
- the intermediate portion 25 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.
- the pin 10 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 30 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 to lift a heavy concrete body.
- the 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 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.
- 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.
- 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.
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)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU29501/92A AU655337B2 (en) | 1991-11-21 | 1992-11-20 | Lifting pin and system |
FI933271A FI933271A (en) | 1991-11-21 | 1993-07-20 | LYFTTAPP OCH -SYSTEM |
NO93932619A NO932619L (en) | 1991-11-21 | 1993-07-20 | LIFTING PLUG AND SYSTEM |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9124780A GB2261650A (en) | 1991-11-21 | 1991-11-21 | Lifting pin |
GB9124780.9 | 1991-11-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1993010321A1 true WO1993010321A1 (en) | 1993-05-27 |
Family
ID=10705022
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB1992/002155 WO1993010321A1 (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) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2312079A (en) * | 1996-04-12 | 1997-10-15 | Sony Uk Ltd | Editing of recorded material |
WO2015187453A1 (en) * | 2014-06-02 | 2015-12-10 | 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 |
Families Citing this family (23)
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---|---|---|---|---|
AU7025200A (en) * | 1999-10-07 | 2001-05-10 | 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 |
WO2014116648A1 (en) | 2013-01-24 | 2014-07-31 | Conxtech, Inc. | Plural-story, pipe-support frame system with modular, removably attachable, lateral-worker-support scaffolding |
JP2016509643A (en) * | 2013-01-27 | 2016-03-31 | コンクステック,インコーポレーテッド | Dual Function Sequential Task Ear Alignment Picking Stack Alignment Building Material Handling System |
WO2014163964A1 (en) | 2013-03-13 | 2014-10-09 | Conxtech, Inc. | Modular, faceted, block-and-shell node system for connecting elongate frame elements |
KR20170010744A (en) | 2014-01-13 | 2017-02-01 | 콘스테크, 아이엔씨. | Clasp-and-lug system |
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 |
USD768466S1 (en) | 2015-03-30 | 2016-10-11 | Conxtech, Inc. | Rail pocket |
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 |
WO2019157393A1 (en) | 2018-02-09 | 2019-08-15 | Conxtech, Inc. | Moment connection component lifting tool assembly |
US11555317B2 (en) | 2018-02-09 | 2023-01-17 | Conxtech, Inc. | Moment connection component clamping tool |
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 |
WO2021168371A1 (en) | 2020-02-19 | 2021-08-26 | Conxtech, Inc. | Modular pipe rack system |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1396982A (en) * | 1963-06-19 | 1965-04-23 | Transport anchor plate, for screw fixing of reinforcing bars used for transporting concrete parts | |
US3433117A (en) * | 1967-06-05 | 1969-03-18 | Standard Pressed Steel Co | High fatigue bolt thread |
DE2514301A1 (en) * | 1975-04-02 | 1976-10-28 | Haeussler Ernst | Reinforced concrete component handling tackle - has shells engaging with bolt head coupled to levers of tongs |
EP0132524A2 (en) * | 1983-07-27 | 1985-02-13 | Deha Ankersysteme GmbH & Co. KG | Connection element to be screwed into a cylindrical anchor embedded in a precast concrete part |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB484261A (en) * | 1937-07-05 | 1938-05-03 | Traylor Engineering & Mfg Comp | Improvements in and relating to suspension means for crusher shafts of gyratory crushers |
GB512307A (en) * | 1939-03-01 | 1939-08-31 | Holman Brothers Ltd | Improvements in or relating to screw and nut elements |
FR1599500A (en) * | 1968-01-31 | 1970-07-15 | ||
US3943817A (en) * | 1974-11-25 | 1976-03-16 | The Dayton Sure-Grip & Shore Company | Split bolt |
CA1051329A (en) * | 1975-10-08 | 1979-03-27 | Horace D. Holmes | Locking thread construction |
US4273175A (en) * | 1979-04-04 | 1981-06-16 | The Lamson & Sessions Co. | Thread convolution |
US4351626A (en) * | 1980-04-18 | 1982-09-28 | Holmes Horace D | Self-locking threaded fastener |
DE4013228C1 (en) * | 1990-04-26 | 1991-06-27 | Man Roland Druckmaschinen Ag, 6050 Offenbach, De |
-
1991
- 1991-11-21 GB GB9124780A patent/GB2261650A/en not_active Withdrawn
-
1992
- 1992-11-20 WO PCT/GB1992/002155 patent/WO1993010321A1/en not_active Application Discontinuation
- 1992-11-20 AU AU29501/92A patent/AU655337B2/en not_active Ceased
- 1992-11-20 GB GB9224376A patent/GB2261651B/en not_active Expired - Fee Related
- 1992-11-20 EP EP19920923890 patent/EP0568677A1/en not_active Withdrawn
- 1992-11-20 CA CA 2100871 patent/CA2100871A1/en not_active Abandoned
-
1993
- 1993-07-20 FI FI933271A patent/FI933271A/en not_active Application Discontinuation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1396982A (en) * | 1963-06-19 | 1965-04-23 | Transport anchor plate, for screw fixing of reinforcing bars used for transporting concrete parts | |
US3433117A (en) * | 1967-06-05 | 1969-03-18 | Standard Pressed Steel Co | High fatigue bolt thread |
DE2514301A1 (en) * | 1975-04-02 | 1976-10-28 | Haeussler Ernst | Reinforced concrete component handling tackle - has shells engaging with bolt head coupled to levers of tongs |
EP0132524A2 (en) * | 1983-07-27 | 1985-02-13 | Deha Ankersysteme GmbH & Co. KG | Connection element to be screwed into a cylindrical anchor embedded in a precast concrete part |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2312079A (en) * | 1996-04-12 | 1997-10-15 | Sony Uk Ltd | Editing of recorded material |
GB2312079B (en) * | 1996-04-12 | 2000-11-15 | Sony Uk Ltd | Editing of recorded material |
US6640044B2 (en) | 1996-04-12 | 2003-10-28 | Sony Corporation | Editing of recorded material using a virtual file representing an edited clip sequence |
WO2015187453A1 (en) * | 2014-06-02 | 2015-12-10 | Applied Materials, Inc. | Lift pin assembly |
CN109390270A (en) * | 2014-06-02 | 2019-02-26 | 应用材料公司 | Go up and down pin assemblies |
US10892180B2 (en) | 2014-06-02 | 2021-01-12 | Applied Materials, Inc. | Lift pin assembly |
CN109390270B (en) * | 2014-06-02 | 2023-04-11 | 应用材料公司 | 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 |
Also Published As
Publication number | Publication date |
---|---|
GB9224376D0 (en) | 1993-01-13 |
GB2261650A (en) | 1993-05-26 |
GB9124780D0 (en) | 1992-01-15 |
EP0568677A1 (en) | 1993-11-10 |
FI933271A0 (en) | 1993-07-20 |
AU2950192A (en) | 1993-06-15 |
FI933271A (en) | 1993-07-20 |
GB2261651B (en) | 1995-01-11 |
CA2100871A1 (en) | 1993-05-22 |
AU655337B2 (en) | 1994-12-15 |
GB2261651A (en) | 1993-05-26 |
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