GB2158805A - Suspension fitting for heavy steel structural units - Google Patents
Suspension fitting for heavy steel structural units Download PDFInfo
- Publication number
- GB2158805A GB2158805A GB08421628A GB8421628A GB2158805A GB 2158805 A GB2158805 A GB 2158805A GB 08421628 A GB08421628 A GB 08421628A GB 8421628 A GB8421628 A GB 8421628A GB 2158805 A GB2158805 A GB 2158805A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cable
- suspension fitting
- bollard
- base portion
- steel structural
- 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.)
- Granted
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
- B66C1/12—Slings comprising chains, wires, ropes, or bands; Nets
-
- 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
Abstract
A suspension fitting of cast steel for use in the lifting of heavy steel structural units comprises a base portion (1) and a bollard device (2) projecting from the base portion with a peripheral cable groove (3) extending at least partially round its circumference. The base portion (1) is made mushroom-shaped and the bollard device (2) projects from the inside of the base portion. From the baseline (4) of the bollard device there runs a surface of revolution (5) extending in the cable zone through at least 90 DEG with the central axis (6) of the bollard device as its axis of rotation and with a curve (7) as its generatrix, with the surface of revolution (5) extending from the cable groove tangentially to the baseline (4) and defining a forwardly facing opening (9) to receive the cable of a lifting crane. <IMAGE>
Description
SPECIFICATION
Suspension fitting for heavy steel structural units
This invention relates to suspension fittings, pref
erably of cast steel, for use in the lifting of heavy
steel structural units.The suspension fittings com- prise bollard means projecting from a base mem
ber and provided with a groove for a wire, cable or the like extending around at least part of the bol
lard circumference.
In drilling for oil from below the sea bed it is
known to build islands in the sea on which large steel containers are placed. Such a container is fitted out on land with all the equipment necessary for carrying out its particular purpose (for example drills, power supplies, cleaning equipment, water supplies, personnel accommodation) and can have
a weight of up to about 3,000 tonnes. As a rule, such containers are fitted out with four or six attachment points for the anchoring of a crane cable.
These attachment points are conventionally constructed as tubes which are welded into a girder or carrying frame which is welded together from sheet metal. These constructions are very expensive to manufacture, primarily because of the very considerable weight of the containers. They also often have the disadvantage that they are positioned above the top level of the container where, after the container has been set down in place, they are a hindrance in the further building of the platform and therefore have to be cut away.
As an alternative, with a view to improving this, attachment points have been provided of cast steel with thick walls and in the form of a bollard adapted to take the crane cable. However, all these are based upon the principle that one such bollard should project from each side of a thick, girder-like base member. Since the bollards are arranged approximately at the centre of the base member and the base member is coupled at each of its ends to the intersection points of the container carrying elements, high bending moments are induced in the container structure.
It is an object of the present invention to provide a suspension fitting which can be made relatively inexpensively and which is compact and which in order to reduce the bending moments can be arranged at the intersection points of the carrying elements of the steel container.
This object is achieved in accordance with the present invention by a suspension fitting for lifting heavy steel structural units, the fitting comprising a mushroom-shaped base portion, bollard means projecting at the inner side of the base portion and having a peripheral cable groove extending at least partially around its circumference, wherein from the baseline of the bollard means there runs a surface of revolution extending in the cable zone through at least 90" with the central axis of the bollard means as its axis of rotation and with a curve as its generatrix, and wherein the surface of revolution extends from the cable groove of the bollard means tangentially to the baseline and defines a forwardly facing opening to receive a lifting cable.
In this way one of the two bollards which con
ventionally are used is made unnecessary and the
one bollard device which is used can be positioned
within a mushroom-shaped base portion which is
arranged substantially centrally at the point of in
tersection of the juxtaposed rods or walls of the
steel structural unit.
The suspension fitting of the present invention is
so compact that it can safely take up the high
loads imposed by the cable tension and by the
steel structural unit. Preferably, the suspension fit
ting is simultaneously so designed that it is possi
ble easily to position the crane cable around the
bollard means.
According to a preferred embodiment of the in
vention, the forwardly facing opening of the sus
pension fitting has a radial width dimension which
is 1.1 to 3 times the axial width of the cable
groove. Thus, and on account of the mushroomshaped internal surface of the fitting, it is possible quickly and automatically to release the steel cable from the fitting after the steel structural unit has
been set down in place, thereby avoiding expen
sive waiting time for the crane-carrying ship.
Profiled members or sheet metal pieces of any type can be welded directly on to the sides of the
mushroom-shaped base portion which face towards the steel structural unit. In a preferred arrangement attachment sections are cast integrally with the base portion and to which elements of the steel structural unit can be welded.
The axis of the bollard means can be positioned inclined to the horizontal, depending upon how the suspension fitting is to be welded on to the steel structural unit.
In order that the invention may be fully understood, two preferred embodiments of suspension fitting in accordance with the invention will now be described by way of example and with reference to the accompanying schematic drawing, in which:
Figure 1 is a front view of a first embodiment of suspension fitting positioned at an attachment point;
Figure 2 is a plan view, taken in section along the line II- II of Fig. 1;
Figure 3 is a sectional view taken along the line Ill-Ill of Fig. 1; and,
Figure 4 shows a modified embodiment of suspension fitting in which the axis of the bollard is inclined to the horizontal.
The suspension fitting as shown in the drawing comprises a mushroom-shaped base member 1 which is provided on its inward side with a bollard 2 which has a peripheral groove 3 for a cable, wire, rope or the like 8. This groove 3 extends at least partially around the circumference of the bollard.
From a baseline 4 which runs tangentially to the axially inner margin of the cable groove 3 there extends a surface of revolution 5. This surface of revolution 5 extends around at least 90 of the fitting, with the central longitudinal axis 6 of the bollard as its axis of rotation and with a curve 7 as its generatrix. The surface of revolution 5 runs tangentially from the cable groove 3 and defines a forwardly facing opening 9 to receive the crane ca ble 8. This forwardly facing opening 9 is dimensioned to be approximately 1.1 to 3 times the axial width 10 of the cable groove 3.
Attachment sections 11 are cast integrally with the base member 1 to enable these sections to be welded to elements, indicated by chain-dotted lines, of the associated steel structural unit.
In the embodiment shown in Fig. 3, the central longitudinal axis 6 of the bollard is shown to lie horizontally. In this embodiment the base member 1 extends up to the upper edge 12, shown by chain-dotted lines, of the associated steel structural unit.
In the embodiment shown in Fig. 4, the central longitudinal axis 13 of the bollard is inclined at an angle to the horizontal, so that the crane cable 8, which is not shown in detail in this Figure of the drawings, can be used without a crane traverse which keeps the crane cable vertical and at a distance above the attachment point.
Claims (6)
1. A suspension fitting for lifting heavy steel structural units, the fitting comprising a mushroom-shaped base portion, bollard means projecting at the inner side of the base portion and having a peripheral cable groove extending at least partially around its circumference, wherein from the baseline of the bollard means there runs a surface of revolution extending in the cable zone through at least 90" with the central axis of the bollard means as its axis of rotation and with a curve as its generatrix, and wherein the surface of revolution extends from the cable groove of the bollard means tangentially to the baseline and defines a forwardly facing opening to receive a lifting cable.
2. A suspension fitting as claimed in claim 1, in which the forwardly facing opening for the lifting cable has a radial width dimension which is 1.1 to 3 times the axial width of the cable groove in the bollard means.
3. A suspension fitting as claimed in claim 1 or 2, in which the base portion has attachment sections cast integrally therewith to be welded to elements of a steel structural unit to be lifted.
4. A suspension fitting as claimed in any preceding claim, in which the central axis of the bollard means is inclined to the horizontal.
5. A suspension fitting as claimed in any preceding claim, made of cast steel.
6. A suspension fitting substantially as hereinbefore described with reference to Figs. 1 to 3 or Fig. 4 of the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3335909A DE3335909C2 (en) | 1983-10-03 | 1983-10-03 | Cast steel attachment for lifting heavy steel structures |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8421628D0 GB8421628D0 (en) | 1984-09-26 |
| GB2158805A true GB2158805A (en) | 1985-11-20 |
| GB2158805B GB2158805B (en) | 1986-07-16 |
Family
ID=6210837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08421628A Expired GB2158805B (en) | 1983-10-03 | 1984-08-25 | Suspension fitting for heavy steel structural units |
Country Status (6)
| Country | Link |
|---|---|
| JP (2) | JPS60106793A (en) |
| DE (1) | DE3335909C2 (en) |
| FR (1) | FR2552739B1 (en) |
| GB (1) | GB2158805B (en) |
| NL (1) | NL189730C (en) |
| NO (1) | NO160347C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2171389A (en) * | 1985-02-27 | 1986-08-28 | Hoesch Stahl Ag | Suspension member for structure whereby the structure can be lifted |
| US4921291A (en) * | 1987-07-22 | 1990-05-01 | River Don Castings Limited | Load lifting apparatus |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH676973A5 (en) * | 1988-09-01 | 1991-03-28 | Fischer Ag Georg | |
| JPH055792U (en) * | 1991-05-08 | 1993-01-26 | 株式会社東芝 | Lifting rope hanging device |
| GB9210601D0 (en) * | 1992-05-18 | 1992-07-01 | River Don Castings Ltd | Improvements in or relating to lifting devices |
| US5735563A (en) * | 1992-05-18 | 1998-04-07 | River Don Castings Limited | Lifting devices |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1121961B (en) * | 1958-11-07 | 1962-01-11 | E J Bean Ltd | Device for mooring ships or the like. |
| DE1217287B (en) * | 1959-07-02 | 1966-05-18 | Alfred Rexroth | Cast niche bollard housing |
| DE1178568B (en) * | 1962-03-28 | 1964-09-24 | Siemens Ag | Carrying device |
| DE1295152B (en) * | 1964-07-21 | 1969-05-14 | Zeier Josef | Handle for stacking and transporting formwork timber, pipes, reinforcement inserts and the like. like |
| JPS51146661U (en) * | 1975-05-19 | 1976-11-25 | ||
| JPS5513354U (en) * | 1978-07-12 | 1980-01-28 | ||
| JPS5537589U (en) * | 1978-09-04 | 1980-03-11 |
-
1983
- 1983-10-03 DE DE3335909A patent/DE3335909C2/en not_active Expired
-
1984
- 1984-08-25 GB GB08421628A patent/GB2158805B/en not_active Expired
- 1984-09-17 NO NO843697A patent/NO160347C/en not_active IP Right Cessation
- 1984-09-26 NL NLAANVRAGE8402932,A patent/NL189730C/en active Search and Examination
- 1984-10-02 FR FR8415086A patent/FR2552739B1/en not_active Expired
- 1984-10-03 JP JP59206483A patent/JPS60106793A/en active Pending
-
1989
- 1989-07-03 JP JP1989078684U patent/JPH072550Y2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2171389A (en) * | 1985-02-27 | 1986-08-28 | Hoesch Stahl Ag | Suspension member for structure whereby the structure can be lifted |
| US4921291A (en) * | 1987-07-22 | 1990-05-01 | River Don Castings Limited | Load lifting apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3335909C2 (en) | 1986-04-10 |
| JPH0215986U (en) | 1990-02-01 |
| JPH072550Y2 (en) | 1995-01-25 |
| GB8421628D0 (en) | 1984-09-26 |
| DE3335909A1 (en) | 1985-04-25 |
| FR2552739A1 (en) | 1985-04-05 |
| NO160347C (en) | 1989-04-12 |
| NL189730B (en) | 1993-02-01 |
| GB2158805B (en) | 1986-07-16 |
| NL8402932A (en) | 1985-05-01 |
| NL189730C (en) | 1993-07-01 |
| NO160347B (en) | 1989-01-02 |
| JPS60106793A (en) | 1985-06-12 |
| NO843697L (en) | 1985-04-09 |
| FR2552739B1 (en) | 1987-12-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
| 732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20020828 |