GB2464448A - Plate having holes for securing a loop in a wire rope - Google Patents
Plate having holes for securing a loop in a wire rope Download PDFInfo
- Publication number
- GB2464448A GB2464448A GB0814246A GB0814246A GB2464448A GB 2464448 A GB2464448 A GB 2464448A GB 0814246 A GB0814246 A GB 0814246A GB 0814246 A GB0814246 A GB 0814246A GB 2464448 A GB2464448 A GB 2464448A
- Authority
- GB
- United Kingdom
- Prior art keywords
- holes
- wire rope
- hole
- loop
- locking device
- 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- Withdrawn
Links
- 238000000034 method Methods 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims 1
- 239000010959 steel Substances 0.000 claims 1
- 239000002184 metal Substances 0.000 description 27
- 238000004378 air conditioning Methods 0.000 description 2
- 238000002788 crimping Methods 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
- F16G11/00—Means for fastening cables or ropes to one another or to other objects; Caps or sleeves for fixing on cables or ropes
- F16G11/04—Means for fastening cables or ropes to one another or to other objects; Caps or sleeves for fixing on cables or ropes with wedging action, e.g. friction clamps
- F16G11/044—Means for fastening cables or ropes to one another or to other objects; Caps or sleeves for fixing on cables or ropes with wedging action, e.g. friction clamps friction clamps deforming the cable, wire, rope or cord
- F16G11/046—Means for fastening cables or ropes to one another or to other objects; Caps or sleeves for fixing on cables or ropes with wedging action, e.g. friction clamps friction clamps deforming the cable, wire, rope or cord by bending the cable around a surface
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
- F16G11/00—Means for fastening cables or ropes to one another or to other objects; Caps or sleeves for fixing on cables or ropes
- F16G11/14—Devices or coupling-pieces designed for easy formation of adjustable loops, e.g. choker hooks; Hooks or eyes with integral parts designed to facilitate quick attachment to cables or ropes at any point, e.g. by forming loops
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Connection Of Plates (AREA)
Abstract
A locking device 1 suitable for securing a loop 46 in a length of wire rope 42. The device comprises a plate 10 having first and second sets of holes 12 and 18. The first set of holes 12 comprises at least two holes 14, 16 and the second set of holes 18 comprises at least three holes 20, 22, 24. The loop 46 in the length of wire rope may be secured by passing an end of the wire rope through a first hole of the first set of holes in a first direction, a second hole of the first set of holes 12 in a second direction, a first hole of the second set of holes in a third direction, a second hole of the second set of holes in a fourth direction, and a third hole of the second set of holes in the third direction. The first and second direction are opposite and the third and fourth directions are opposite. The device is preferably used as a hanger for suspending an object 60.
Description
LOCKING DEVICE
The present invention relates to a locking device for securing rope, in particular, a locking plate for use with wire rope suspensions.
In the construction industry, devices, known as "hangers", may be used to suspend various objects from horizontal fixed structures, such as a concrete beams.
Hangers usually comprise a length of metal bar, wire or wire rope having one end fixed to the horizontal structure and the other end attached to the object to be suspended. Objects suspended in this way include electrical or mechanical services such as bundles of electric cables or air conditioning ducts.
One known hanger comprises a length of metal wire rope having a ioop at the top and a loop at the bottom.
The top loop is formed by returning a free end of the rope and crimping a ferrule around it and an adjacent portion of the wire rope. Lengths of wire rope may be provided with the top loop pre-formed. In use, the top loop is used to attach the length of wire rope to a bracket or other fixing on a fixed horizontal structure.
The free end is then passed around the object to be suspended. A bottom loop is formed by passing the free-end around the object and securing it using a locking device such as a rope grip. Examples of rope grips are described in GB 2 210 517 and GB 2 415 012.
GB 2 415 012 discloses a rope grip comprising a body having a first and a second passage, each passage having associated with it a spring and a locking wedge. A secure loop may be formed by passing a free-end of the wire rope through the first passage in a first direction and then through the second passage in a second direction, the second direction being opposite to the first direction. The springs and the locking wedges are arranged so that the wire rope cannot be moved through the first passage in the second direction or through the second passage in the second direction.
The above-described rope grip has the advantage that a loop of wire rope, or indeed a connection between two separate wire ropes, may be formed quickly and easily.
However, it is relatively expensive to manufacture due to the number of separate parts that must be assembled.
Suspended ceilings can also be suspended using hangers. Suspended ceilings comprise a number of metal joists that run parallel to each other, each metal joist being suspended from a horizontal fixed structure by a number of hangers. The suspended metal joists support tiles, such as polystyrene tiles, in order to provide a suspended ceiling. A large number of hangers are needed to suspend a suspended ceiling since the metal joists are usually spaced at l.2m intervals and are typically provided in 2.4rn or 3.6m sections. Metal wire rope hangers using the above-described rope grip are therefore not usually used due to their relatively high cost.
Instead, metal wire hangers having single top and bottom loops are used. Both the top loop and the bottom loop are secured by twisting the metal wire. This process is time consuming and it can be difficult to finely adjust the length of the hanger. Further, metal wire is provided in reels and must be uncoiled before use.
According to a first aspect of the invention there is provided a locking device suitable for securing a loop in a length of wire rope comprising: a plate having a first set of holes and a second set of holes, the first set of holes comprising at least two holes and the second set of holes comprising at least three holes; wherein: the loop in the length of wire rope may be secured by passing an end of the wire rope through a first hole of the first set of holes in a first direction, a second hole of the first set of holes in a second direction, a first hole of the second set of holes in a third direction, a second hole of the second set of holes in a fourth direction, and a third hole of the second set of holes in the third direction; and the first and second directions are opposite and the third and fourth directions are opposite.
The first set of holes may be aligned in a first line and the second set of holes may be aligned in a second line. The first and second lines may be substantially parallel.
The holes may be countersunk on both sides of the plate and the countersink angle may be approximately 45°.
The second set of holes may comprise three holes.
According to a second aspect of the invention there is provided a hanger suitable for suspending an object from a fixed structure, comprising a length of wire rope having a first end and a second end; wherein the second end of the wire rope has a ioop arranged to be attached to an object, the loop being secured using a locking
device according to any statement herein.
The first end of the wire rope may have a loop that is arranged to attach the wire rope to the fixed structure. The loop of the first end of the wire rope may be secured with a ferrule or other suitable end fixing and the loop of the first end of the wire rope may be pre-formed. Alternatively, the ioop of the first end of the wire rope may be secured using a locking device
according to any statement herein.
According to a third aspect of the invention there is provided a method of forming a secure loop of wire rope using a locking device according to any statement herein comprising the steps of: passing an end of the wire rope through a first hole of the first set of holes in a first direction, a second hole of the first set of holes in a second direction, a first hole of the second set of holes in a third direction, a second hole of the second set of holes in a fourth direction, and a third hole of the second set of holes in the third direction; wherein the first and second directions are opposite and the third and fourth directions are opposite.
According to a fourth aspect of the invention there is provided a method of suspending an object from a fixed structure using a length of wire rope and a locking device according to any statement herein comprising the steps of: attaching a first end of the wire rope to the fixed structure; passing a second end of the wire rope through a first hole of the first set of holes in a first direction, a second hole of the first set of holes in a second direction, wherein the first and second directions are opposite; passing the second end of the wire rope around or through the object; and passing the second end of the wire rope through a first hole of the second set of holes in a third direction, a second hole of the second set of holes in a fourth direction, and a third hole of the second set of holes in the third direction; wherein the third and fourth directions are opposite.
According to a fifth aspect of the invention there is provided a friction restraint for rope portions, comprising: a plate member having first and second sets of holes through which first and second portions of rope are arranged to pass in use, the first and second sets of holes being aligned in substantially straight first and second lines which are spaced apart and substantially parallel, wherein the first and second sets of holes are arranged respectively to retain the first and second rope portions in juxtaposition by friction engagement.
Embodiments of the present invention will now be described, by way of example only, with reference to the accompanying drawings, in which: Figure 1 schematically shows a locking device according to an embodiment of the present invention; Figure 2 schematically shows two cross-sectional views of the locking device of Figure 1 along the lines A-A and B-B; Figure 3 schematically shows a hanger using a locking device according to an embodiment of the present invention; Figure 4 schematically shows two cross-sectional views of the locking device of Figure 1 along the lines IA-A and B-B when the locking device is in use; and Figure 5 schematically shows a locking device according to the present invention for attaching two lengths of wire rope.
Referring to Figure 1 a locking device 1 comprises a flat rectangular metal plate 10 having a first set of holes 12 and a second set of holes 18. The first set of holes comprises two holes 14, 16 and the second set of holes comprises three holes 20, 22, 24. The holes are all located in the plane of the metal plate. The first set of holes 12 are located on a first line 26 and the second set of holes are located on a second line 28, the first and second lines being spaced apart and substantially parallel. Although the locking device 1 has been described as being a metal plate, in other embodiments other materials, such as plastic may be used.
Figure 2 shows two cross-sectional views of the locking device 1 along the lines A-A and B-B shown in Figure 1. The holes of the first set of holes 12 and the holes of the second set of holes 18 are countersunk on both sides of the metal plate 10. The countersink angle may be approximately 45g. Although in this embodiment the holes are countersunk on both sides of the metal plate 10, it may be desirable to countersink the holes on only one side or not at all.
The locking device 1 can be manufactured easily, quickly and cheaply, by, for example punching it from a sheet of metal. The countersunk holes may be cut out at the same time or they may be drilled and countersunk in a separate operation. Since the locking devices are made from a single workpiece they are extremely cheap to manufacture.
Figure 3 shows a hanger 40, suspending a metal joist 60, using a locking device 1. Although the hanger 40 is described as suspending a metal joist 60, any other object may be suspended using the hanger 40. Such examples include, but are not limited to, basket trays, light trunking, air conditioning ducts, data cables, power cables, water pipes and waste pipes.
The hanger comprises a length of metal wire rope 42 with a top loop 44 formed at a first end of the rope 42 and a bottom loop 46 formed at a second end of the rope 42. The top loop 44 is attached to a fixed structure such as a concrete beam 50 and the bottom loop 46 is attached to the metal joist 60.
Lengths of wire rope 42 may be provided with the top loop pre-formed. Alternatively, the wire rope may be provided on a reel with individual lengths then being cut and the top loop being formed, in-situ. The top loop 42 may be formed by crimping a metal ferrule around a free-end of the wire rope and an adjacent lower portion of the wire rope. However, as will be readily apparent to one skilled in the art, other methods of forming a loop may be used. In one embodiment, the top loop 44 may be formed by using a locking device 1 according to any
statement herein.
Various fixing methods may be used to attach the top loop 44 of the wire rope hanger to the fixed structure 50. For example, a wire anchor 52, a hook, or a bolt may be used. Alternatively, the top loop 44 may be passed around a beam and the lower end of the wire rope inserted through the top loop. It is not essential that the wire rope hanger comprises a top loop 44. There are a wide variety of fixing methods that may be used to secure the top of the wire rope hanger to a fixed structure without having a top ioop.
In order to attach the metal joist 60 to the hanger a locking device 1, such as the locking device illustrated in Figure 1, is used. With reference to Figure 4 the bottom free-end of the wire rope is passed through one of the holes 14 of the first set of holes 12 in a first direction and is then subsequently passed through the second hole 16 of the first set of holes 12 in a second opposed direction. A length of wire rope is left protruding from the second hole 16 of the first set of holes. This is then passed through a hole in the metal joist 60 and then through a first hole 20 of the second set of holes 18 in a third direction, the second hole 22 of the second set of holes 18 in a fourth opposed direction, and then through the third hole 24 (otherwise known as the locking hole) of the second set of holes 18 in the third direction. The first and the third directions may be the same, alternatively, the first and fourth directions may be the same. The locking device 1 provides a secure loop 46 of wire rope that is capable of supporting the metal joist 60.
With the locking device 1 it is possible quickly and easily to secure a loop of wire rope in-situ by hand, without the need for any special tools. Further, the locking device 1 forms a connection that can withstand a large load. If desired, it is possible to undo the connection formed by the locking device 1 without damaging the wire rope.
Referring once again to Figure 4, the locking mechanism of the locking device 1 will be explained in more detail. As can be seen from the cross-sectional view B-B along the line of first set of holes 12, the wire rope 42 is in tension along the same line both above and below the locking device 1. This is because above the locking device 1 an end of the wire rope 42 is attached to a fixed structure and 50 and below the locking device 1 the loop 46 suspends the metal joist 60.
Due to the action of gravity on the metal joist 60, the tensional forces in the wire rope 42 are parallel to each other both above and below the locking device 1. The tensional forces are also in a direction that is substantially parallel to the plane of the locking plate 10. This, in conjunction with the diameter and spacing of the holes 12 and the thickness of the plate 10, causes the locking device 1 to be firmly held in position on the first set of holes 12 due to the friction between the edge of the holes and the rope. As can be seen from Figure 4 B-B, the angle that the wire rope 42 exits the holes 14, 16 on either side of the plate is approximately 45°, this ensures that the locking plate 10 is securely attached to the wire rope 42 by the first set of holes 12. The angle that the wire rope 42 exits the holes may be comparable to the countersink angle of the holes.
Countersinking the holes also increases the surface area over which the wire rope 42 is in contact with the plate.
This reduces localised friction and may help to prevent the wire rope 42 from damage.
Referring to the cross-sectional view A-A along the second set of holes 18 below the locking device 1, the wire rope 42 is in tension because it is part of the loop 46 that suspends the metal joist 60. However, the portion of the wire rope 42 above the locking device 1 that protrudes from the third locking hole 24 is not in tension. This is why the second set of holes 18 requires the third locking hole 24. As can be seen from A-A, the angle that the wire rope 42 exits the first and second hole 20, 22 on either side of the plate is approximately 45°, this ensures that the locking device is securely attached to the wire rope 42 by the second set of holes 18 due to the friction between the edge of the holes and the rope. However, the wire rope 42 exits the third locking hole 24 in a direction that is approximately perpendicular to the plate 10. This is because the free end of the wire rope 42 is not in tension in a direction that is substantially parallel to the plane of the locking plate 10. Therefore, if the third locking hole 24 was not present then the free end of the wire rope 42 would exit the second hole 22 in a direction that is approximately perpendicular to the plate and the locking device would riot be securely attached to the device by the second set of holes 18.
As described above, the locking action between the wire rope 42 and the first set of holes 12 and thesecond set of holes 18 forms a secure loop that can withstand a large force.
The locking force provided between a wire rope having a specific diameter and the sets of holes can be varied by altering the diameter of the holes, the pitch of the holes and the thickness of the plate. It is desirable to select the above parameters so that the angle with which the wire rope exits the holes is approximately 45°. As discussed above, this provides a good locking action.
Although the locking device 1 has been described with reference to forming a loop 46 of wire rope 42, it may also be used to join two lengths of wire rope together. Turning to Figure 5, in this example, both the first set of holes 12 and the second set of holes 18 comprise three holes. This is because each of the lengths of wire rope 42, 42' has a free end that is not in tension, therefore, each set of holes requires a third locking hole in order to ensure locking between the length of wire rope 42 and the first set of holes 12 and the length of wire rope 42' and the second set of holes.
Claims (14)
- CLAIMS: 1. A locking device (1) suitable for securing a loop (46) in a length of wire rope (42) comprising: a plate (10) having a first set of holes (12) and a second set of holes (18), the first set of holes (12) comprising at least two holes (14, 16) and the second set of holes (18) comprising at least three holes (20, 22, 24); wherein: the loop (46) in the length of wire rope (42) may be secured by passing an end of the wire rope (42) through a first hole (14) of the first set of holes (12) in a first direction, a second hole (16) of the first set of holes (12) in a second direction, a first hole (20) of the second set of holes (18) in a third direction, a second hole (22) of the second set of holes (18) in a fourth direction, and a third hole (24) of the second set of holes (18) in the third direction; and the first and second directions are opposite and the third and fourth directions are opposite.
- 2. The locking device (1) according to claim 1, wherein the first set of holes (12) are aligned in a first line (26) and the second set of holes (18) are aligned in a second line (28), the first and second lines being parallel.
- 3. The locking device (1) according to claim 1 or 2, wherein the holes (14, 16, 20, 22,24) are countersunk on both sides of the plate.
- 4. The locking device (1) according to claim 3, wherein the countersink angle is approximately 45°.
- 5. The locking device (1) according to any preceding claim, wherein the plate (10) is made from steel.
- 6. The locking device (1) according to any preceding claim, wherein the second set of holes (18) comprises three holes.
- 7. A hanger suitable for suspending an object (60) from a fixed structure (50), comprising a length of wire rope (42) having a first end and a second end; wherein the second end of the wire rope (42) has a loop (46) arranged to be attached to an object, the loop being secured using a locking device (1) according to any of claims 1-6.
- 8. The hanger according to claim 7, wherein the first end of the wire rope (42) has a loop (44) that is arranged to attach the wire rope (42) to the fixed structure (50)
- 9. The hanger according to claim 8, wherein the loop (44) of the first end of the wire rope (42) is secured with a ferrule.
- 10. The hanger according to claim 8 or 9, wherein the loop (44) of the first end of the wire rope (42) is pre-formed.
- 11. The hanger according to claim 8 or 9, wherein the loop (44) of the first end of the wire rope (42) is secured using a locking device (1) according to any of claims 1-6.
- 12. A method of forming a secure loop (46) of wire rope (42) using a locking device (1) according to any of claims 1-6 comprising the steps of: passing an end of the wire rope (42) through a first hole (14) of *the first set of holes (12) in a first direction, a second hole (16) of the first set of holes (12) in a second direction, a first hole (20) of the second set of holes (18) in a third direction, a second hole (22) of the second set of holes (18) in a fourth direction, and a third hole (24) of the second set of holes (18) in the third direction; wherein the first and second directions are opposite and the third and fourth directions are opposite.
- 13. A method of suspending an object (60) from a fixed structure (50) using a length of wire rope (42) and a locking device (1) according to any of claims 1-6, comprising the steps of: attaching a first end of the wire rope (42) to the fixed structure (50); passing a second end of the wire rope (42) through a first hole (14) of the first set of holes (12) in a first direction, a second hole (16) of the first set of holes (12) in a second direction, wherein the first and second directions are opposite; passing the second end of the wire rope (42) around or through the object (60); and passing the second end of the wire rope (42) through a first hole (20) of the second set of holes (18) in a third direction, a second hole (22) of the second set of holes (18) in a fourth direction, and a third hole (24) of the second set of holes (18) in the third direction; wherein the third and fourth directions are opposite.-13 -
- 14. A friction restraint for rope portions, comprising: a plate member having first and second sets of holes through which first and second portions of rope are arranged to pass in use, the first and second sets of holes being aligned in substantially straight first and second lines which are spaced apart and substantially parallel, wherein the first and second sets of holes are arranged respectively to retain the first and second rope portions in juxtaposition by friction engagement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0814246A GB2464448A (en) | 2008-08-04 | 2008-08-04 | Plate having holes for securing a loop in a wire rope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0814246A GB2464448A (en) | 2008-08-04 | 2008-08-04 | Plate having holes for securing a loop in a wire rope |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB0814246D0 GB0814246D0 (en) | 2008-09-10 |
| GB2464448A true GB2464448A (en) | 2010-04-21 |
Family
ID=39767491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0814246A Withdrawn GB2464448A (en) | 2008-08-04 | 2008-08-04 | Plate having holes for securing a loop in a wire rope |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2464448A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022185237A1 (en) * | 2021-03-03 | 2022-09-09 | Vaico Limited | A support system and components thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2217768A (en) * | 1987-12-29 | 1989-11-01 | Matthew Wessel Moolman | Cord cleat |
| GB2244089A (en) * | 1990-05-15 | 1991-11-20 | Peter Frederick Nash | Securing device for line(s) |
| US20040034972A1 (en) * | 2002-08-26 | 2004-02-26 | Brown Jason Aaron | Rope-securing device |
| DE10256756A1 (en) * | 2002-12-05 | 2004-06-24 | Jurii Orlov | Connecting element for flexible cord or cable has holes passing through flat body in same plane and symmetrically spaced from each other at right angle or diagonally |
-
2008
- 2008-08-04 GB GB0814246A patent/GB2464448A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2217768A (en) * | 1987-12-29 | 1989-11-01 | Matthew Wessel Moolman | Cord cleat |
| GB2244089A (en) * | 1990-05-15 | 1991-11-20 | Peter Frederick Nash | Securing device for line(s) |
| US20040034972A1 (en) * | 2002-08-26 | 2004-02-26 | Brown Jason Aaron | Rope-securing device |
| DE10256756A1 (en) * | 2002-12-05 | 2004-06-24 | Jurii Orlov | Connecting element for flexible cord or cable has holes passing through flat body in same plane and symmetrically spaced from each other at right angle or diagonally |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022185237A1 (en) * | 2021-03-03 | 2022-09-09 | Vaico Limited | A support system and components thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| GB0814246D0 (en) | 2008-09-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |